Merge branch 'develop' of git.pleroma.social:pleroma/pleroma into issue/2115

CHANGELOG.md

@@ -5,14 +5,51 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 
 ## Unreleased
 
+### Added
+- Experimental websocket-based federation between Pleroma instances.
+
 ### Changed
 
 - Renamed `:await_up_timeout` in `:connections_pool` namespace to `:connect_timeout`, old name is deprecated.
 - Renamed `:timeout` in `pools` namespace to `:recv_timeout`, old name is deprecated.
+- The `discoverable` field in the `User` struct will now add a NOINDEX metatag to profile pages when false.
+- Users with the `discoverable` field set to false will not show up in searches.
+- Minimum lifetime for ephmeral activities changed to 10 minutes and made configurable (`:min_lifetime` option).
+
+### Added
+- Media preview proxy (requires media proxy be enabled; see `:media_preview_proxy` config for more details).
+- Pleroma API: Importing the mutes users from CSV files.
 
 ### Removed
 
-- **Breaking:** Removed `Pleroma.Workers.Cron.StatsWorker` setting from Oban `:crontab`.
+- **Breaking:** `Pleroma.Workers.Cron.StatsWorker` setting from Oban `:crontab` (moved to a simpler implementation).
+- **Breaking:** `Pleroma.Workers.Cron.ClearOauthTokenWorker` setting from Oban `:crontab` (moved to scheduled jobs).
+- **Breaking:** `Pleroma.Workers.Cron.PurgeExpiredActivitiesWorker` setting from Oban `:crontab` (moved to scheduled jobs).
+- Removed `:managed_config` option. In practice, it was accidentally removed with 2.0.0 release when frontends were
+switched to a new configuration mechanism, however it was not officially removed until now.
+
+
+## [2.1.2] - 2020-09-17
+
+### Security
+
+- Fix most MRF rules either crashing or not being applied to objects passed into the Common Pipeline (ChatMessage, Question, Answer, Audio, Event).
+
+### Fixed
+
+- Welcome Chat messages preventing user registration with MRF Simple Policy applied to the local instance.
+- Mastodon API: the public timeline returning an error when the `reply_visibility` parameter is set to `self` for an unauthenticated user.
+- Mastodon Streaming API: Handler crashes on authentication failures, resulting in error logs.
+- Mastodon Streaming API: Error logs on client pings.
+- Rich media: Log spam on failures. Now the error is only logged once per attempt.
+
+### Changed
+
+- Rich Media: A HEAD request is now done to the url, to ensure it has the appropriate content type and size before proceeding with a GET.
+
+### Upgrade notes
+
+1. Restart Pleroma
 
 ## [2.1.1] - 2020-09-08
 
@@ -29,6 +66,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/).
 ### Added
 - Rich media failure tracking (along with `:failure_backoff` option).
 
+<details>
+  <summary>Admin API Changes</summary>
+
+- Add `PATCH /api/pleroma/admin/instance_document/:document_name` to modify the Terms of Service and Instance Panel HTML pages via Admin API
+</details>
+
 ### Fixed
 - Default HTTP adapter not respecting pool setting, leading to possible OOM.
 - Fixed uploading webp images when the Exiftool Upload Filter is enabled by skipping them

README.md

@@ -18,15 +18,16 @@ If you are running Linux (glibc or musl) on x86/arm, the recommended way to inst
 ### From Source
 If your platform is not supported, or you just want to be able to edit the source code easily, you may install Pleroma from source.
 
-- [Debian-based](https://docs-develop.pleroma.social/backend/installation/debian_based_en/)
-- [Debian-based (jp)](https://docs-develop.pleroma.social/backend/installation/debian_based_jp/)
 - [Alpine Linux](https://docs-develop.pleroma.social/backend/installation/alpine_linux_en/)
 - [Arch Linux](https://docs-develop.pleroma.social/backend/installation/arch_linux_en/)
+- [CentOS 7](https://docs-develop.pleroma.social/backend/installation/centos7_en/)
+- [Debian-based](https://docs-develop.pleroma.social/backend/installation/debian_based_en/)
+- [Debian-based (jp)](https://docs-develop.pleroma.social/backend/installation/debian_based_jp/)
+- [FreeBSD](https://docs-develop.pleroma.social/backend/installation/freebsd_en/)
 - [Gentoo Linux](https://docs-develop.pleroma.social/backend/installation/gentoo_en/)
 - [NetBSD](https://docs-develop.pleroma.social/backend/installation/netbsd_en/)
 - [OpenBSD](https://docs-develop.pleroma.social/backend/installation/openbsd_en/)
 - [OpenBSD (fi)](https://docs-develop.pleroma.social/backend/installation/openbsd_fi/)
-- [CentOS 7](https://docs-develop.pleroma.social/backend/installation/centos7_en/)
 
 ### OS/Distro packages
 Currently Pleroma is not packaged by any OS/Distros, but if you want to package it for one, we can guide you through the process on our [community channels](#community-channels). If you want to change default options in your Pleroma package, please **discuss it with us first**.

config/config.exs

@@ -130,6 +130,7 @@ config :pleroma, Pleroma.Web.Endpoint,
     dispatch: [
       {:_,
        [
+         {"/api/fedsocket/v1", Pleroma.Web.FedSockets.IncomingHandler, []},
          {"/api/v1/streaming", Pleroma.Web.MastodonAPI.WebsocketHandler, []},
          {"/websocket", Phoenix.Endpoint.CowboyWebSocket,
           {Phoenix.Transports.WebSocket,
@@ -148,6 +149,16 @@ config :pleroma, Pleroma.Web.Endpoint,
     "SameSite=Lax"
   ]
 
+config :pleroma, :fed_sockets,
+  enabled: false,
+  connection_duration: :timer.hours(8),
+  rejection_duration: :timer.minutes(15),
+  fed_socket_fetches: [
+    default: 12_000,
+    interval: 3_000,
+    lazy: false
+  ]
+
 # Configures Elixir's Logger
 config :logger, :console,
   level: :debug,
@@ -216,7 +227,6 @@ config :pleroma, :instance,
   allow_relay: true,
   public: true,
   quarantined_instances: [],
-  managed_config: true,
   static_dir: "instance/static/",
   allowed_post_formats: [
     "text/plain",
@@ -424,6 +434,8 @@ config :pleroma, :media_proxy,
   proxy_opts: [
     redirect_on_failure: false,
     max_body_length: 25 * 1_048_576,
+    # Note: max_read_duration defaults to Pleroma.ReverseProxy.max_read_duration_default/1
+    max_read_duration: 30_000,
     http: [
       follow_redirect: true,
       pool: :media
@@ -438,6 +450,14 @@ config :pleroma, Pleroma.Web.MediaProxy.Invalidation.Http,
 
 config :pleroma, Pleroma.Web.MediaProxy.Invalidation.Script, script_path: nil
 
+# Note: media preview proxy depends on media proxy to be enabled
+config :pleroma, :media_preview_proxy,
+  enabled: false,
+  thumbnail_max_width: 600,
+  thumbnail_max_height: 600,
+  image_quality: 85,
+  min_content_length: 100 * 1024
+
 config :pleroma, :chat, enabled: true
 
 config :phoenix, :format_encoders, json: Jason
@@ -530,8 +550,10 @@ config :pleroma, Oban,
   log: false,
   queues: [
     activity_expiration: 10,
+    token_expiration: 5,
     federator_incoming: 50,
     federator_outgoing: 50,
+    ingestion_queue: 50,
     web_push: 50,
     mailer: 10,
     transmogrifier: 20,
@@ -543,8 +565,6 @@ config :pleroma, Oban,
   ],
   plugins: [Oban.Plugins.Pruner],
   crontab: [
-    {"0 0 * * *", Pleroma.Workers.Cron.ClearOauthTokenWorker},
-    {"* * * * *", Pleroma.Workers.Cron.PurgeExpiredActivitiesWorker},
     {"0 0 * * 0", Pleroma.Workers.Cron.DigestEmailsWorker},
     {"0 0 * * *", Pleroma.Workers.Cron.NewUsersDigestWorker}
   ]
@@ -655,7 +675,7 @@ config :pleroma, :rate_limit,
   account_confirmation_resend: {8_640_000, 5},
   ap_routes: {60_000, 15}
 
-config :pleroma, Pleroma.ActivityExpiration, enabled: true
+config :pleroma, Pleroma.Workers.PurgeExpiredActivity, enabled: true, min_lifetime: 600
 
 config :pleroma, Pleroma.Plugs.RemoteIp, enabled: true
 
@@ -743,8 +763,8 @@ config :pleroma, :pools,
   ],
   media: [
     size: 50,
-    max_waiting: 10,
+    max_waiting: 20,
-    recv_timeout: 10_000
+    recv_timeout: 15_000
   ],
   upload: [
     size: 25,
@@ -789,6 +809,8 @@ config :tzdata, :http_client, Pleroma.HTTP.Tzdata
 
 config :ex_aws, http_client: Pleroma.HTTP.ExAws
 
+config :web_push_encryption, http_client: Pleroma.HTTP
+
 config :pleroma, :instances_favicons, enabled: false
 
 config :floki, :html_parser, Floki.HTMLParser.FastHtml

config/description.exs

@@ -270,6 +270,19 @@ config :pleroma, :config_description, [
       }
     ]
   },
+  %{
+    group: :pleroma,
+    key: :fed_sockets,
+    type: :group,
+    description: "Websocket based federation",
+    children: [
+      %{
+        key: :enabled,
+        type: :boolean,
+        description: "Enable FedSockets"
+      }
+    ]
+  },
   %{
     group: :pleroma,
     key: Pleroma.Emails.Mailer,
@@ -764,12 +777,6 @@ config :pleroma, :config_description, [
           "*.quarantined.com"
         ]
       },
-      %{
-        key: :managed_config,
-        type: :boolean,
-        description:
-          "Whenether the config for pleroma-fe is configured in this config or in static/config.json"
-      },
       %{
         key: :static_dir,
         type: :string,
@@ -1880,6 +1887,7 @@ config :pleroma, :config_description, [
         suggestions: [
           redirect_on_failure: false,
           max_body_length: 25 * 1_048_576,
+          max_read_duration: 30_000,
           http: [
             follow_redirect: true,
             pool: :media
@@ -1900,6 +1908,11 @@ config :pleroma, :config_description, [
               "Limits the content length to be approximately the " <>
                 "specified length. It is validated with the `content-length` header and also verified when proxying."
           },
+          %{
+            key: :max_read_duration,
+            type: :integer,
+            description: "Timeout (in milliseconds) of GET request to remote URI."
+          },
           %{
             key: :http,
             label: "HTTP",
@@ -1946,6 +1959,43 @@ config :pleroma, :config_description, [
       }
     ]
   },
+  %{
+    group: :pleroma,
+    key: :media_preview_proxy,
+    type: :group,
+    description: "Media preview proxy",
+    children: [
+      %{
+        key: :enabled,
+        type: :boolean,
+        description:
+          "Enables proxying of remote media preview to the instance's proxy. Requires enabled media proxy."
+      },
+      %{
+        key: :thumbnail_max_width,
+        type: :integer,
+        description:
+          "Max width of preview thumbnail for images (video preview always has original dimensions)."
+      },
+      %{
+        key: :thumbnail_max_height,
+        type: :integer,
+        description:
+          "Max height of preview thumbnail for images (video preview always has original dimensions)."
+      },
+      %{
+        key: :image_quality,
+        type: :integer,
+        description: "Quality of the output. Ranges from 0 (min quality) to 100 (max quality)."
+      },
+      %{
+        key: :min_content_length,
+        type: :integer,
+        description:
+          "Min content length to perform preview, in bytes. If greater than 0, media smaller in size will be served as is, without thumbnailing."
+      }
+    ]
+  },
   %{
     group: :pleroma,
     key: Pleroma.Web.MediaProxy.Invalidation.Http,
@@ -2290,8 +2340,6 @@ config :pleroma, :config_description, [
         type: {:list, :tuple},
         description: "Settings for cron background jobs",
         suggestions: [
-          {"0 0 * * *", Pleroma.Workers.Cron.ClearOauthTokenWorker},
-          {"* * * * *", Pleroma.Workers.Cron.PurgeExpiredActivitiesWorker},
           {"0 0 * * 0", Pleroma.Workers.Cron.DigestEmailsWorker},
           {"0 0 * * *", Pleroma.Workers.Cron.NewUsersDigestWorker}
         ]
@@ -2397,7 +2445,7 @@ config :pleroma, :config_description, [
   %{
     group: :pleroma,
     key: Pleroma.Formatter,
-    label: "Auto Linker",
+    label: "Linkify",
     type: :group,
     description:
       "Configuration for Pleroma's link formatter which parses mentions, hashtags, and URLs.",
@@ -2474,14 +2522,20 @@ config :pleroma, :config_description, [
   },
   %{
     group: :pleroma,
-    key: Pleroma.ActivityExpiration,
+    key: Pleroma.Workers.PurgeExpiredActivity,
     type: :group,
-    description: "Expired activity settings",
+    description: "Expired activities settings",
     children: [
       %{
         key: :enabled,
         type: :boolean,
-        description: "Whether expired activities will be sent to the job queue to be deleted"
+        description: "Enables expired activities addition & deletion"
+      },
+      %{
+        key: :min_lifetime,
+        type: :integer,
+        description: "Minimum lifetime for ephemeral activity (in seconds)",
+        suggestions: [600]
       }
     ]
   },

config/test.exs

@@ -19,6 +19,11 @@ config :logger, :console,
   level: :warn,
   format: "\n[$level] $message\n"
 
+config :pleroma, :fed_sockets,
+  enabled: false,
+  connection_duration: 5,
+  rejection_duration: 5
+
 config :pleroma, :auth, oauth_consumer_strategies: []
 
 config :pleroma, Pleroma.Upload,

docs/API/admin_api.md

@@ -1334,3 +1334,166 @@ Loads json generated from `config/descriptions.exs`.
 { }
 
 ```
+
+## GET /api/pleroma/admin/users/:nickname/chats
+
+### List a user's chats
+
+- Params: None
+
+- Response:
+
+```json
+[
+   {
+      "sender": {
+        "id": "someflakeid",
+        "username": "somenick",
+        ...
+      },
+      "receiver": {
+        "id": "someflakeid",
+        "username": "somenick",
+        ...
+      },
+      "id" : "1",
+      "unread" : 2,
+      "last_message" : {...}, // The last message in that chat
+      "updated_at": "2020-04-21T15:11:46.000Z"
+   }
+]
+```
+
+## GET /api/pleroma/admin/chats/:chat_id
+
+### View a single chat
+
+- Params: None
+
+- Response:
+
+```json
+{
+  "sender": {
+    "id": "someflakeid",
+    "username": "somenick",
+    ...
+  },
+  "receiver": {
+    "id": "someflakeid",
+    "username": "somenick",
+    ...
+  },
+  "id" : "1",
+  "unread" : 2,
+  "last_message" : {...}, // The last message in that chat
+  "updated_at": "2020-04-21T15:11:46.000Z"
+}
+```
+
+## GET /api/pleroma/admin/chats/:chat_id/messages
+
+### List the messages in a chat
+
+- Params: `max_id`, `min_id`
+
+- Response:
+
+```json
+[
+  {
+    "account_id": "someflakeid",
+    "chat_id": "1",
+    "content": "Check this out :firefox:",
+    "created_at": "2020-04-21T15:11:46.000Z",
+    "emojis": [
+      {
+        "shortcode": "firefox",
+        "static_url": "https://dontbulling.me/emoji/Firefox.gif",
+        "url": "https://dontbulling.me/emoji/Firefox.gif",
+        "visible_in_picker": false
+      }
+    ],
+    "id": "13",
+    "unread": true
+  },
+  {
+    "account_id": "someflakeid",
+    "chat_id": "1",
+    "content": "Whats' up?",
+    "created_at": "2020-04-21T15:06:45.000Z",
+    "emojis": [],
+    "id": "12",
+    "unread": false
+  }
+]
+```
+
+## DELETE /api/pleroma/admin/chats/:chat_id/messages/:message_id
+
+### Delete a single message
+
+- Params: None
+
+- Response:
+
+```json
+{
+  "account_id": "someflakeid",
+  "chat_id": "1",
+  "content": "Check this out :firefox:",
+  "created_at": "2020-04-21T15:11:46.000Z",
+  "emojis": [
+    {
+      "shortcode": "firefox",
+      "static_url": "https://dontbulling.me/emoji/Firefox.gif",
+      "url": "https://dontbulling.me/emoji/Firefox.gif",
+      "visible_in_picker": false
+    }
+  ],
+  "id": "13",
+  "unread": false
+}
+```
+
+## `GET /api/pleroma/admin/instance_document/:document_name`
+
+### Get an instance document
+
+- Authentication: required
+
+- Response:
+
+Returns the content of the document
+
+```html
+<h1>Instance panel</h1>
+```
+
+## `PATCH /api/pleroma/admin/instance_document/:document_name`
+- Params:
+  - `file` (the file to be uploaded, using multipart form data.)
+
+### Update an instance document
+
+- Authentication: required
+
+- Response:
+
+``` json
+{
+  "url": "https://example.com/instance/panel.html"
+}
+```
+
+## `DELETE /api/pleroma/admin/instance_document/:document_name`
+
+### Delete an instance document
+
+- Response:
+
+``` json
+{
+  "url": "https://example.com/instance/panel.html"
+}
+```

docs/API/pleroma_api.md

@@ -44,6 +44,22 @@ Request parameters can be passed via [query strings](https://en.wikipedia.org/wi
 * Response: HTTP 200 on success, 500 on error
 * Note: Users that can't be followed are silently skipped.
 
+## `/api/pleroma/blocks_import`
+### Imports your blocks.
+* Method: `POST`
+* Authentication: required
+* Params:
+    * `list`: STRING or FILE containing a whitespace-separated list of accounts to block
+* Response: HTTP 200 on success, 500 on error
+
+## `/api/pleroma/mutes_import`
+### Imports your mutes.
+* Method: `POST`
+* Authentication: required
+* Params:
+    * `list`: STRING or FILE containing a whitespace-separated list of accounts to mute
+* Response: HTTP 200 on success, 500 on error
+
 ## `/api/pleroma/captcha`
 ### Get a new captcha
 * Method: `GET`

docs/configuration/cheatsheet.md

@@ -18,7 +18,7 @@ To add configuration to your config file, you can copy it from the base config.
 * `notify_email`: Email used for notifications.
 * `description`: The instance’s description, can be seen in nodeinfo and ``/api/v1/instance``.
 * `limit`: Posts character limit (CW/Subject included in the counter).
-* `discription_limit`: The character limit for image descriptions.
+* `description_limit`: The character limit for image descriptions.
 * `chat_limit`: Character limit of the instance chat messages.
 * `remote_limit`: Hard character limit beyond which remote posts will be dropped.
 * `upload_limit`: File size limit of uploads (except for avatar, background, banner).
@@ -40,7 +40,6 @@ To add configuration to your config file, you can copy it from the base config.
 * `allow_relay`: Enable Pleroma’s Relay, which makes it possible to follow a whole instance.
 * `public`: Makes the client API in authenticated mode-only except for user-profiles. Useful for disabling the Local Timeline and The Whole Known Network. Note that there is a dependent setting restricting or allowing unauthenticated access to specific resources, see `restrict_unauthenticated` for more details.
 * `quarantined_instances`: List of ActivityPub instances where private (DMs, followers-only) activities will not be send.
-* `managed_config`: Whenether the config for pleroma-fe is configured in [:frontend_configurations](#frontend_configurations) or in ``static/config.json``.
 * `allowed_post_formats`: MIME-type list of formats allowed to be posted (transformed into HTML).
 * `extended_nickname_format`: Set to `true` to use extended local nicknames format (allows underscores/dashes). This will break federation with
     older software for theses nicknames.
@@ -226,6 +225,16 @@ Enables the worker which processes posts scheduled for deletion. Pinned posts ar
 
 * `enabled`: whether expired activities will be sent to the job queue to be deleted
 
+## FedSockets
+FedSockets is an experimental feature allowing for Pleroma backends to federate using a persistant websocket connection as opposed to making each federation a seperate http connection. This feature is currently off by default. It is configurable throught he following options.
+
+### :fedsockets
+* `enabled`: Enables FedSockets for this instance. `false` by default.
+* `connection_duration`: Time an idle websocket is kept open.
+* `rejection_duration`: Failures to connect via FedSockets will not be retried for this period of time.
+* `fed_socket_fetches` and `fed_socket_rejections`: Settings passed to `cachex` for the fetch registry, and rejection stacks. See `Pleroma.Web.FedSockets` for more details.
+
+
 ## Frontends
 
 ### :frontend_configurations
@@ -315,6 +324,14 @@ This section describe PWA manifest instance-specific values. Currently this opti
   * `enabled`: Enables purge cache
   * `provider`: Which one of  the [purge cache strategy](#purge-cache-strategy) to use.
 
+## :media_preview_proxy
+
+* `enabled`: Enables proxying of remote media preview to the instance’s proxy. Requires enabled media proxy (`media_proxy/enabled`).
+* `thumbnail_max_width`: Max width of preview thumbnail for images (video preview always has original dimensions).
+* `thumbnail_max_height`: Max height of preview thumbnail for images (video preview always has original dimensions).
+* `image_quality`: Quality of the output. Ranges from 0 (min quality) to 100 (max quality).
+* `min_content_length`: Min content length to perform preview, in bytes. If greater than 0, media smaller in size will be served as is, without thumbnailing.
+
 ### Purge cache strategy
 
 #### Pleroma.Web.MediaProxy.Invalidation.Script
@@ -691,9 +708,8 @@ Pleroma has the following queues:
 
 Pleroma has these periodic job workers:
 
-`Pleroma.Workers.Cron.ClearOauthTokenWorker` - a job worker to cleanup expired oauth tokens.
+* `Pleroma.Workers.Cron.DigestEmailsWorker` - digest emails for users with new mentions and follows
-
+* `Pleroma.Workers.Cron.NewUsersDigestWorker` - digest emails for admins with new registrations
-Example:
 
 ```elixir
 config :pleroma, Oban,
@@ -705,7 +721,8 @@ config :pleroma, Oban,
     federator_outgoing: 50
   ],
   crontab: [
-    {"0 0 * * *", Pleroma.Workers.Cron.ClearOauthTokenWorker}
+    {"0 0 * * 0", Pleroma.Workers.Cron.DigestEmailsWorker},
+    {"0 0 * * *", Pleroma.Workers.Cron.NewUsersDigestWorker}
   ]
 ```
 
@@ -972,7 +989,7 @@ Configure OAuth 2 provider capabilities:
 
 * `token_expires_in` - The lifetime in seconds of the access token.
 * `issue_new_refresh_token` - Keeps old refresh token or generate new refresh token when to obtain an access token.
-* `clean_expired_tokens` - Enable a background job to clean expired oauth tokens. Defaults to `false`. Interval settings sets in configuration periodic jobs [`Oban.Cron`](#obancron)
+* `clean_expired_tokens` - Enable a background job to clean expired oauth tokens. Defaults to `false`.
 
 ## Link parsing
 
@@ -1091,3 +1108,10 @@ config :pleroma, :frontends,
 ```
 
 This would serve the frontend from the the folder at `$instance_static/frontends/pleroma/stable`. You have to copy the frontend into this folder yourself. You can choose the name and ref any way you like, but they will be used by mix tasks to automate installation in the future, the name referring to the project and the ref referring to a commit.
+
+## Ephemeral activities (Pleroma.Workers.PurgeExpiredActivity)
+
+Settings to enable and configure expiration for ephemeral activities
+
+* `:enabled` - enables ephemeral activities creation
+* `:min_lifetime` - minimum lifetime for ephemeral activities (in seconds). Default: 10 minutes.

installation/pleroma.nginx

@@ -9,6 +9,12 @@
 proxy_cache_path /tmp/pleroma-media-cache levels=1:2 keys_zone=pleroma_media_cache:10m max_size=10g
                  inactive=720m use_temp_path=off;
 
+# this is explicitly IPv4 since Pleroma.Web.Endpoint binds on IPv4 only
+# and `localhost.` resolves to [::0] on some systems: see issue #930
+upstream phoenix {
+    server 127.0.0.1:4000 max_fails=5 fail_timeout=60s;
+}
+
 server {
     server_name    example.tld;
 
@@ -63,19 +69,16 @@ server {
 
     # the nginx default is 1m, not enough for large media uploads
     client_max_body_size 16m;
+    ignore_invalid_headers off;
 
-    location / {
     proxy_http_version 1.1;
     proxy_set_header Upgrade $http_upgrade;
     proxy_set_header Connection "upgrade";
     proxy_set_header Host $http_host;
     proxy_set_header X-Forwarded-For $proxy_add_x_forwarded_for;
 
-        # this is explicitly IPv4 since Pleroma.Web.Endpoint binds on IPv4 only
+    location / {
-        # and `localhost.` resolves to [::0] on some systems: see issue #930
+        proxy_pass http://phoenix;
-        proxy_pass http://127.0.0.1:4000;
-
-        client_max_body_size 16m;
     }
 
     location ~ ^/(media|proxy) {
@@ -83,12 +86,16 @@ server {
         slice              1m;
         proxy_cache_key    $host$uri$is_args$args$slice_range;
         proxy_set_header   Range $slice_range;
-        proxy_http_version 1.1;
         proxy_cache_valid  200 206 301 304 1h;
         proxy_cache_lock   on;
         proxy_ignore_client_abort on;
         proxy_buffering    on;
         chunked_transfer_encoding on;
-        proxy_pass         http://127.0.0.1:4000;
+        proxy_pass         http://phoenix;
+    }
+
+    location /api/fedsocket/v1 {
+        proxy_request_buffering off;
+        proxy_pass http://phoenix/api/fedsocket/v1;
     }
 }

lib/mix/tasks/pleroma/config.ex

@@ -32,7 +32,8 @@ defmodule Mix.Tasks.Pleroma.Config do
 
   @spec migrate_to_db(Path.t() | nil) :: any()
   def migrate_to_db(file_path \\ nil) do
-    if Pleroma.Config.get([:configurable_from_database]) do
+    with true <- Pleroma.Config.get([:configurable_from_database]),
+         :ok <- Pleroma.Config.DeprecationWarnings.warn() do
       config_file =
         if file_path do
           file_path
@@ -46,7 +47,8 @@ defmodule Mix.Tasks.Pleroma.Config do
 
       do_migrate_to_db(config_file)
     else
-      migration_error()
+      :error -> deprecation_error()
+      _ -> migration_error()
     end
   end
 
@@ -120,6 +122,10 @@ defmodule Mix.Tasks.Pleroma.Config do
     )
   end
 
+  defp deprecation_error do
+    shell_error("Migration is not allowed until all deprecation warnings have been resolved.")
+  end
+
   if Code.ensure_loaded?(Config.Reader) do
     defp config_header, do: "import Config\r\n\r\n"
     defp read_file(config_file), do: Config.Reader.read_imports!(config_file)

lib/mix/tasks/pleroma/database.ex

@@ -99,7 +99,7 @@ defmodule Mix.Tasks.Pleroma.Database do
       where: fragment("(?)->>'likes' is not null", object.data),
       select: %{id: object.id, likes: fragment("(?)->>'likes'", object.data)}
     )
-    |> Pleroma.RepoStreamer.chunk_stream(100)
+    |> Pleroma.Repo.chunk_stream(100, :batches)
     |> Stream.each(fn objects ->
       ids =
         objects
@@ -133,8 +133,7 @@ defmodule Mix.Tasks.Pleroma.Database do
     days = Pleroma.Config.get([:mrf_activity_expiration, :days], 365)
 
     Pleroma.Activity
-    |> join(:left, [a], u in assoc(a, :expiration))
+    |> join(:inner, [a], o in Object,
-    |> join(:inner, [a, _u], o in Object,
       on:
         fragment(
           "(?->>'id') = COALESCE((?)->'object'->> 'id', (?)->>'object')",
@@ -144,14 +143,20 @@ defmodule Mix.Tasks.Pleroma.Database do
         )
     )
     |> where(local: true)
-    |> where([a, u], is_nil(u))
     |> where([a], fragment("(? ->> 'type'::text) = 'Create'", a.data))
-    |> where([_a, _u, o], fragment("?->>'type' = 'Note'", o.data))
+    |> where([_a, o], fragment("?->>'type' = 'Note'", o.data))
-    |> Pleroma.RepoStreamer.chunk_stream(100)
+    |> Pleroma.Repo.chunk_stream(100, :batches)
     |> Stream.each(fn activities ->
       Enum.each(activities, fn activity ->
-        expires_at = Timex.shift(activity.inserted_at, days: days)
+        expires_at =
-        Pleroma.ActivityExpiration.create(activity, expires_at, false)
+          activity.inserted_at
+          |> DateTime.from_naive!("Etc/UTC")
+          |> Timex.shift(days: days)
+
+        Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
+          activity_id: activity.id,
+          expires_at: expires_at
+        })
       end)
     end)
     |> Stream.run()

lib/mix/tasks/pleroma/emoji.ex

@@ -183,7 +183,7 @@ defmodule Mix.Tasks.Pleroma.Emoji do
 
     IO.puts("Downloading the pack and generating SHA256")
 
-    binary_archive = Tesla.get!(client(), src).body
+    {:ok, %{body: binary_archive}} = Pleroma.HTTP.get(src)
     archive_sha = :crypto.hash(:sha256, binary_archive) |> Base.encode16()
 
     IO.puts("SHA256 is #{archive_sha}")
@@ -252,7 +252,7 @@ defmodule Mix.Tasks.Pleroma.Emoji do
   end
 
   defp fetch("http" <> _ = from) do
-    with {:ok, %{body: body}} <- Tesla.get(client(), from) do
+    with {:ok, %{body: body}} <- Pleroma.HTTP.get(from) do
       {:ok, body}
     end
   end
@@ -271,13 +271,5 @@ defmodule Mix.Tasks.Pleroma.Emoji do
     )
   end
 
-  defp client do
-    middleware = [
-      {Tesla.Middleware.FollowRedirects, [max_redirects: 3]}
-    ]
-
-    Tesla.client(middleware)
-  end
-
   defp default_manifest, do: Pleroma.Config.get!([:emoji, :default_manifest])
 end

lib/mix/tasks/pleroma/user.ex

@@ -179,7 +179,7 @@ defmodule Mix.Tasks.Pleroma.User do
     start_pleroma()
 
     Pleroma.User.Query.build(%{nickname: "@#{instance}"})
-    |> Pleroma.RepoStreamer.chunk_stream(500)
+    |> Pleroma.Repo.chunk_stream(500, :batches)
     |> Stream.each(fn users ->
       users
       |> Enum.each(fn user ->
@@ -370,7 +370,7 @@ defmodule Mix.Tasks.Pleroma.User do
     start_pleroma()
 
     Pleroma.User.Query.build(%{local: true})
-    |> Pleroma.RepoStreamer.chunk_stream(500)
+    |> Pleroma.Repo.chunk_stream(500, :batches)
     |> Stream.each(fn users ->
       users
       |> Enum.each(fn user ->

lib/pleroma/activity.ex

@@ -7,7 +7,6 @@ defmodule Pleroma.Activity do
 
   alias Pleroma.Activity
   alias Pleroma.Activity.Queries
-  alias Pleroma.ActivityExpiration
   alias Pleroma.Bookmark
   alias Pleroma.Notification
   alias Pleroma.Object
@@ -60,8 +59,6 @@ defmodule Pleroma.Activity do
     # typical case.
     has_one(:object, Object, on_delete: :nothing, foreign_key: :id)
 
-    has_one(:expiration, ActivityExpiration, on_delete: :delete_all)
-
     timestamps()
   end
 
@@ -304,14 +301,14 @@ defmodule Pleroma.Activity do
     |> Repo.all()
   end
 
-  def follow_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
+  def follow_requests_for_actor(%User{ap_id: ap_id}) do
     ap_id
     |> Queries.by_object_id()
     |> Queries.by_type("Follow")
     |> where([a], fragment("? ->> 'state' = 'pending'", a.data))
   end
 
-  def following_requests_for_actor(%Pleroma.User{ap_id: ap_id}) do
+  def following_requests_for_actor(%User{ap_id: ap_id}) do
     Queries.by_type("Follow")
     |> where([a], fragment("?->>'state' = 'pending'", a.data))
     |> where([a], a.actor == ^ap_id)

lib/pleroma/activity_expiration.ex

@@ -1,74 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.ActivityExpiration do
-  use Ecto.Schema
-
-  alias Pleroma.Activity
-  alias Pleroma.ActivityExpiration
-  alias Pleroma.Repo
-
-  import Ecto.Changeset
-  import Ecto.Query
-
-  @type t :: %__MODULE__{}
-  @min_activity_lifetime :timer.hours(1)
-
-  schema "activity_expirations" do
-    belongs_to(:activity, Activity, type: FlakeId.Ecto.CompatType)
-    field(:scheduled_at, :naive_datetime)
-  end
-
-  def changeset(%ActivityExpiration{} = expiration, attrs, validate_scheduled_at) do
-    expiration
-    |> cast(attrs, [:scheduled_at])
-    |> validate_required([:scheduled_at])
-    |> validate_scheduled_at(validate_scheduled_at)
-  end
-
-  def get_by_activity_id(activity_id) do
-    ActivityExpiration
-    |> where([exp], exp.activity_id == ^activity_id)
-    |> Repo.one()
-  end
-
-  def create(%Activity{} = activity, scheduled_at, validate_scheduled_at \\ true) do
-    %ActivityExpiration{activity_id: activity.id}
-    |> changeset(%{scheduled_at: scheduled_at}, validate_scheduled_at)
-    |> Repo.insert()
-  end
-
-  def due_expirations(offset \\ 0) do
-    naive_datetime =
-      NaiveDateTime.utc_now()
-      |> NaiveDateTime.add(offset, :millisecond)
-
-    ActivityExpiration
-    |> where([exp], exp.scheduled_at < ^naive_datetime)
-    |> limit(50)
-    |> preload(:activity)
-    |> Repo.all()
-    |> Enum.reject(fn %{activity: activity} ->
-      Activity.pinned_by_actor?(activity)
-    end)
-  end
-
-  def validate_scheduled_at(changeset, false), do: changeset
-
-  def validate_scheduled_at(changeset, true) do
-    validate_change(changeset, :scheduled_at, fn _, scheduled_at ->
-      if not expires_late_enough?(scheduled_at) do
-        [scheduled_at: "an ephemeral activity must live for at least one hour"]
-      else
-        []
-      end
-    end)
-  end
-
-  def expires_late_enough?(scheduled_at) do
-    now = NaiveDateTime.utc_now()
-    diff = NaiveDateTime.diff(scheduled_at, now, :millisecond)
-    diff > @min_activity_lifetime
-  end
-end

lib/pleroma/application.ex

@@ -99,7 +99,7 @@ defmodule Pleroma.Application do
           {Oban, Config.get(Oban)}
         ] ++
         task_children(@env) ++
-        streamer_child(@env) ++
+        dont_run_in_test(@env) ++
         chat_child(@env, chat_enabled?()) ++
         [
           Pleroma.Web.Endpoint,
@@ -188,16 +188,17 @@ defmodule Pleroma.Application do
 
   defp chat_enabled?, do: Config.get([:chat, :enabled])
 
-  defp streamer_child(env) when env in [:test, :benchmark], do: []
+  defp dont_run_in_test(env) when env in [:test, :benchmark], do: []
 
-  defp streamer_child(_) do
+  defp dont_run_in_test(_) do
     [
       {Registry,
        [
          name: Pleroma.Web.Streamer.registry(),
          keys: :duplicate,
          partitions: System.schedulers_online()
-       ]}
+       ]},
+      Pleroma.Web.FedSockets.Supervisor
     ]
   end
 

lib/pleroma/chat.ex

@@ -8,6 +8,7 @@ defmodule Pleroma.Chat do
   import Ecto.Changeset
   import Ecto.Query
 
+  alias Pleroma.Chat
   alias Pleroma.Repo
   alias Pleroma.User
 
@@ -85,4 +86,12 @@ defmodule Pleroma.Chat do
       conflict_target: [:user_id, :recipient]
     )
   end
+
+  @spec for_user_query(FlakeId.Ecto.CompatType.t()) :: Ecto.Query.t()
+  def for_user_query(user_id) do
+    from(c in Chat,
+      where: c.user_id == ^user_id,
+      order_by: [desc: c.updated_at]
+    )
+  end
 end

lib/pleroma/config/deprecation_warnings.ex

@@ -8,7 +8,7 @@ defmodule Pleroma.Config.DeprecationWarnings do
   require Logger
   alias Pleroma.Config
 
-  @type config_namespace() :: [atom()]
+  @type config_namespace() :: atom() | [atom()]
   @type config_map() :: {config_namespace(), config_namespace(), String.t()}
 
   @mrf_config_map [
@@ -26,6 +26,10 @@ defmodule Pleroma.Config.DeprecationWarnings do
       !!!DEPRECATION WARNING!!!
       You are using the old configuration mechanism for the hellthread filter. Please check config.md.
       """)
+
+      :error
+    else
+      :ok
     end
   end
 
@@ -47,16 +51,26 @@ defmodule Pleroma.Config.DeprecationWarnings do
 
       config :pleroma, :mrf_user_allowlist, #{inspect(rewritten, pretty: true)}
       """)
+
+      :error
+    else
+      :ok
     end
   end
 
   def warn do
-    check_hellthread_threshold()
+    with :ok <- check_hellthread_threshold(),
-    mrf_user_allowlist()
+         :ok <- mrf_user_allowlist(),
-    check_old_mrf_config()
+         :ok <- check_old_mrf_config(),
-    check_media_proxy_whitelist_config()
+         :ok <- check_media_proxy_whitelist_config(),
-    check_welcome_message_config()
+         :ok <- check_welcome_message_config(),
-    check_gun_pool_options()
+         :ok <- check_gun_pool_options(),
+         :ok <- check_activity_expiration_config() do
+      :ok
+    else
+      _ ->
+        :error
+    end
   end
 
   def check_welcome_message_config do
@@ -73,6 +87,10 @@ defmodule Pleroma.Config.DeprecationWarnings do
       \n* `config :pleroma, :instance, welcome_user_nickname` is now `config :pleroma, :welcome, :direct_message, :sender_nickname`
       \n* `config :pleroma, :instance, welcome_message` is now `config :pleroma, :welcome, :direct_message, :message`
       """)
+
+      :error
+    else
+      :ok
     end
   end
 
@@ -100,8 +118,11 @@ defmodule Pleroma.Config.DeprecationWarnings do
           end
       end)
 
-    if warning != "" do
+    if warning == "" do
+      :ok
+    else
       Logger.warn(warning_preface <> warning)
+      :error
     end
   end
 
@@ -114,6 +135,10 @@ defmodule Pleroma.Config.DeprecationWarnings do
       !!!DEPRECATION WARNING!!!
       Your config is using old format (only domain) for MediaProxy whitelist option. Setting should work for now, but you are advised to change format to scheme with port to prevent possible issues later.
       """)
+
+      :error
+    else
+      :ok
     end
   end
 
@@ -156,6 +181,25 @@ defmodule Pleroma.Config.DeprecationWarnings do
       Logger.warn(Enum.join([warning_preface | pool_warnings]))
 
       Config.put(:pools, updated_config)
+      :error
+    else
+      :ok
     end
   end
+
+  @spec check_activity_expiration_config() :: :ok | nil
+  def check_activity_expiration_config do
+    warning_preface = """
+    !!!DEPRECATION WARNING!!!
+      Your config is using old namespace for activity expiration configuration. Setting should work for now, but you are advised to change to new namespace to prevent possible issues later:
+    """
+
+    move_namespace_and_warn(
+      [
+        {Pleroma.ActivityExpiration, Pleroma.Workers.PurgeExpiredActivity,
+         "\n* `config :pleroma, Pleroma.ActivityExpiration` is now `config :pleroma, Pleroma.Workers.PurgeExpiredActivity`"}
+      ],
+      warning_preface
+    )
+  end
 end

lib/pleroma/config/oban.ex

@@ -5,7 +5,11 @@ defmodule Pleroma.Config.Oban do
     oban_config = Pleroma.Config.get(Oban)
 
     crontab =
-      [Pleroma.Workers.Cron.StatsWorker]
+      [
+        Pleroma.Workers.Cron.StatsWorker,
+        Pleroma.Workers.Cron.PurgeExpiredActivitiesWorker,
+        Pleroma.Workers.Cron.ClearOauthTokenWorker
+      ]
       |> Enum.reduce(oban_config[:crontab], fn removed_worker, acc ->
         with acc when is_list(acc) <- acc,
              setting when is_tuple(setting) <-

lib/pleroma/gun/conn.ex

@@ -50,10 +50,10 @@ defmodule Pleroma.Gun.Conn do
 
     with open_opts <- Map.delete(opts, :tls_opts),
          {:ok, conn} <- Gun.open(proxy_host, proxy_port, open_opts),
-         {:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]),
+         {:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]),
          stream <- Gun.connect(conn, connect_opts),
          {:response, :fin, 200, _} <- Gun.await(conn, stream) do
-      {:ok, conn}
+      {:ok, conn, protocol}
     else
       error ->
         Logger.warn(
@@ -88,8 +88,8 @@ defmodule Pleroma.Gun.Conn do
       |> Map.put(:socks_opts, socks_opts)
 
     with {:ok, conn} <- Gun.open(proxy_host, proxy_port, opts),
-         {:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]) do
+         {:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
-      {:ok, conn}
+      {:ok, conn, protocol}
     else
       error ->
         Logger.warn(
@@ -106,8 +106,8 @@ defmodule Pleroma.Gun.Conn do
     host = Pleroma.HTTP.AdapterHelper.parse_host(host)
 
     with {:ok, conn} <- Gun.open(host, port, opts),
-         {:ok, _} <- Gun.await_up(conn, opts[:connect_timeout]) do
+         {:ok, protocol} <- Gun.await_up(conn, opts[:connect_timeout]) do
-      {:ok, conn}
+      {:ok, conn, protocol}
     else
       error ->
         Logger.warn(

lib/pleroma/gun/connection_pool/worker.ex

@@ -15,7 +15,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
 
   @impl true
   def handle_continue({:connect, [key, uri, opts, client_pid]}, _) do
-    with {:ok, conn_pid} <- Gun.Conn.open(uri, opts),
+    with {:ok, conn_pid, protocol} <- Gun.Conn.open(uri, opts),
          Process.link(conn_pid) do
       time = :erlang.monotonic_time(:millisecond)
 
@@ -27,8 +27,12 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
       send(client_pid, {:conn_pid, conn_pid})
 
       {:noreply,
-       %{key: key, timer: nil, client_monitors: %{client_pid => Process.monitor(client_pid)}},
+       %{
-       :hibernate}
+         key: key,
+         timer: nil,
+         client_monitors: %{client_pid => Process.monitor(client_pid)},
+         protocol: protocol
+       }, :hibernate}
     else
       err ->
         {:stop, {:shutdown, err}, nil}
@@ -53,14 +57,20 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
   end
 
   @impl true
-  def handle_call(:add_client, {client_pid, _}, %{key: key} = state) do
+  def handle_call(:add_client, {client_pid, _}, %{key: key, protocol: protocol} = state) do
     time = :erlang.monotonic_time(:millisecond)
 
-    {{conn_pid, _, _, _}, _} =
+    {{conn_pid, used_by, _, _}, _} =
       Registry.update_value(@registry, key, fn {conn_pid, used_by, crf, last_reference} ->
         {conn_pid, [client_pid | used_by], crf(time - last_reference, crf), time}
       end)
 
+    :telemetry.execute(
+      [:pleroma, :connection_pool, :client, :add],
+      %{client_pid: client_pid, clients: used_by},
+      %{key: state.key, protocol: protocol}
+    )
+
     state =
       if state.timer != nil do
         Process.cancel_timer(state[:timer])
@@ -83,12 +93,8 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
       end)
 
     {ref, state} = pop_in(state.client_monitors[client_pid])
-    # DOWN message can receive right after `remove_client` call and cause worker to terminate
+
-    state =
+    Process.demonitor(ref, [:flush])
-      if is_nil(ref) do
-        state
-      else
-        Process.demonitor(ref)
 
     timer =
       if used_by == [] do
@@ -98,10 +104,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
         nil
       end
 
-        %{state | timer: timer}
+    {:reply, :ok, %{state | timer: timer}, :hibernate}
-      end
-
-    {:reply, :ok, state, :hibernate}
   end
 
   @impl true
@@ -131,7 +134,7 @@ defmodule Pleroma.Gun.ConnectionPool.Worker do
   @impl true
   def handle_info({:DOWN, _ref, :process, pid, reason}, state) do
     :telemetry.execute(
-      [:pleroma, :connection_pool, :client_death],
+      [:pleroma, :connection_pool, :client, :dead],
       %{client_pid: pid, reason: reason},
       %{key: state.key}
     )

lib/pleroma/helpers/media_helper.ex

@@ -0,0 +1,150 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Helpers.MediaHelper do
+  @moduledoc """
+  Handles common media-related operations.
+  """
+
+  alias Pleroma.HTTP
+
+  def image_resize(url, options) do
+    with executable when is_binary(executable) <- System.find_executable("convert"),
+         {:ok, args} <- prepare_image_resize_args(options),
+         {:ok, env} <- HTTP.get(url, [], pool: :media),
+         {:ok, fifo_path} <- mkfifo() do
+      args = List.flatten([fifo_path, args])
+      run_fifo(fifo_path, env, executable, args)
+    else
+      nil -> {:error, {:convert, :command_not_found}}
+      {:error, _} = error -> error
+    end
+  end
+
+  defp prepare_image_resize_args(
+         %{max_width: max_width, max_height: max_height, format: "png"} = options
+       ) do
+    quality = options[:quality] || 85
+    resize = Enum.join([max_width, "x", max_height, ">"])
+
+    args = [
+      "-resize",
+      resize,
+      "-quality",
+      to_string(quality),
+      "png:-"
+    ]
+
+    {:ok, args}
+  end
+
+  defp prepare_image_resize_args(%{max_width: max_width, max_height: max_height} = options) do
+    quality = options[:quality] || 85
+    resize = Enum.join([max_width, "x", max_height, ">"])
+
+    args = [
+      "-interlace",
+      "Plane",
+      "-resize",
+      resize,
+      "-quality",
+      to_string(quality),
+      "jpg:-"
+    ]
+
+    {:ok, args}
+  end
+
+  defp prepare_image_resize_args(_), do: {:error, :missing_options}
+
+  # Note: video thumbnail is intentionally not resized (always has original dimensions)
+  def video_framegrab(url) do
+    with executable when is_binary(executable) <- System.find_executable("ffmpeg"),
+         {:ok, env} <- HTTP.get(url, [], pool: :media),
+         {:ok, fifo_path} <- mkfifo(),
+         args = [
+           "-y",
+           "-i",
+           fifo_path,
+           "-vframes",
+           "1",
+           "-f",
+           "mjpeg",
+           "-loglevel",
+           "error",
+           "-"
+         ] do
+      run_fifo(fifo_path, env, executable, args)
+    else
+      nil -> {:error, {:ffmpeg, :command_not_found}}
+      {:error, _} = error -> error
+    end
+  end
+
+  defp run_fifo(fifo_path, env, executable, args) do
+    pid =
+      Port.open({:spawn_executable, executable}, [
+        :use_stdio,
+        :stream,
+        :exit_status,
+        :binary,
+        args: args
+      ])
+
+    fifo = Port.open(to_charlist(fifo_path), [:eof, :binary, :stream, :out])
+    fix = Pleroma.Helpers.QtFastStart.fix(env.body)
+    true = Port.command(fifo, fix)
+    :erlang.port_close(fifo)
+    loop_recv(pid)
+  after
+    File.rm(fifo_path)
+  end
+
+  defp mkfifo do
+    path = Path.join(System.tmp_dir!(), "pleroma-media-preview-pipe-#{Ecto.UUID.generate()}")
+
+    case System.cmd("mkfifo", [path]) do
+      {_, 0} ->
+        spawn(fifo_guard(path))
+        {:ok, path}
+
+      {_, err} ->
+        {:error, {:fifo_failed, err}}
+    end
+  end
+
+  defp fifo_guard(path) do
+    pid = self()
+
+    fn ->
+      ref = Process.monitor(pid)
+
+      receive do
+        {:DOWN, ^ref, :process, ^pid, _} ->
+          File.rm(path)
+      end
+    end
+  end
+
+  defp loop_recv(pid) do
+    loop_recv(pid, <<>>)
+  end
+
+  defp loop_recv(pid, acc) do
+    receive do
+      {^pid, {:data, data}} ->
+        loop_recv(pid, acc <> data)
+
+      {^pid, {:exit_status, 0}} ->
+        {:ok, acc}
+
+      {^pid, {:exit_status, status}} ->
+        {:error, status}
+    after
+      5000 ->
+        :erlang.port_close(pid)
+        {:error, :timeout}
+    end
+  end
+end

lib/pleroma/helpers/qt_fast_start.ex

@@ -0,0 +1,131 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Helpers.QtFastStart do
+  @moduledoc """
+  (WIP) Converts a "slow start" (data before metadatas) mov/mp4 file to a "fast start" one (metadatas before data).
+  """
+
+  # TODO: Cleanup and optimizations
+  # Inspirations: https://www.ffmpeg.org/doxygen/3.4/qt-faststart_8c_source.html
+  #               https://github.com/danielgtaylor/qtfaststart/blob/master/qtfaststart/processor.py
+  #               ISO/IEC 14496-12:2015, ISO/IEC 15444-12:2015
+  #               Paracetamol
+
+  def fix(<<0x00, 0x00, 0x00, _, 0x66, 0x74, 0x79, 0x70, _::bits>> = binary) do
+    index = fix(binary, 0, nil, nil, [])
+
+    case index do
+      :abort -> binary
+      [{"ftyp", _, _, _, _}, {"mdat", _, _, _, _} | _] -> faststart(index)
+      [{"ftyp", _, _, _, _}, {"free", _, _, _, _}, {"mdat", _, _, _, _} | _] -> faststart(index)
+      _ -> binary
+    end
+  end
+
+  def fix(binary) do
+    binary
+  end
+
+  # MOOV have been seen before MDAT- abort
+  defp fix(<<_::bits>>, _, true, false, _) do
+    :abort
+  end
+
+  defp fix(
+         <<size::integer-big-size(32), fourcc::bits-size(32), rest::bits>>,
+         pos,
+         got_moov,
+         got_mdat,
+         acc
+       ) do
+    full_size = (size - 8) * 8
+    <<data::bits-size(full_size), rest::bits>> = rest
+
+    acc = [
+      {fourcc, pos, pos + size, size,
+       <<size::integer-big-size(32), fourcc::bits-size(32), data::bits>>}
+      | acc
+    ]
+
+    fix(rest, pos + size, got_moov || fourcc == "moov", got_mdat || fourcc == "mdat", acc)
+  end
+
+  defp fix(<<>>, _pos, _, _, acc) do
+    :lists.reverse(acc)
+  end
+
+  defp faststart(index) do
+    {{_ftyp, _, _, _, ftyp}, index} = List.keytake(index, "ftyp", 0)
+
+    # Skip re-writing the free fourcc as it's kind of useless.
+    # Why stream useless bytes when you can do without?
+    {free_size, index} =
+      case List.keytake(index, "free", 0) do
+        {{_, _, _, size, _}, index} -> {size, index}
+        _ -> {0, index}
+      end
+
+    {{_moov, _, _, moov_size, moov}, index} = List.keytake(index, "moov", 0)
+    offset = -free_size + moov_size
+    rest = for {_, _, _, _, data} <- index, do: data, into: []
+    <<moov_head::bits-size(64), moov_data::bits>> = moov
+    [ftyp, moov_head, fix_moov(moov_data, offset, []), rest]
+  end
+
+  defp fix_moov(
+         <<size::integer-big-size(32), fourcc::bits-size(32), rest::bits>>,
+         offset,
+         acc
+       ) do
+    full_size = (size - 8) * 8
+    <<data::bits-size(full_size), rest::bits>> = rest
+
+    data =
+      cond do
+        fourcc in ["trak", "mdia", "minf", "stbl"] ->
+          # Theses contains sto or co64 part
+          [<<size::integer-big-size(32), fourcc::bits-size(32)>>, fix_moov(data, offset, [])]
+
+        fourcc in ["stco", "co64"] ->
+          # fix the damn thing
+          <<version::integer-big-size(32), count::integer-big-size(32), rest::bits>> = data
+
+          entry_size =
+            case fourcc do
+              "stco" -> 32
+              "co64" -> 64
+            end
+
+          [
+            <<size::integer-big-size(32), fourcc::bits-size(32), version::integer-big-size(32),
+              count::integer-big-size(32)>>,
+            rewrite_entries(entry_size, offset, rest, [])
+          ]
+
+        true ->
+          [<<size::integer-big-size(32), fourcc::bits-size(32)>>, data]
+      end
+
+    acc = [acc | data]
+    fix_moov(rest, offset, acc)
+  end
+
+  defp fix_moov(<<>>, _, acc), do: acc
+
+  for size <- [32, 64] do
+    defp rewrite_entries(
+           unquote(size),
+           offset,
+           <<pos::integer-big-size(unquote(size)), rest::bits>>,
+           acc
+         ) do
+      rewrite_entries(unquote(size), offset, rest, [
+        acc | <<pos + offset::integer-big-size(unquote(size))>>
+      ])
+    end
+  end
+
+  defp rewrite_entries(_, _, <<>>, acc), do: acc
+end

lib/pleroma/helpers/uri_helper.ex

@@ -3,18 +3,22 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Helpers.UriHelper do
-  def append_uri_params(uri, appended_params) do
+  def modify_uri_params(uri, overridden_params, deleted_params \\ []) do
     uri = URI.parse(uri)
-    appended_params = for {k, v} <- appended_params, into: %{}, do: {to_string(k), v}
+
-    existing_params = URI.query_decoder(uri.query || "") |> Enum.into(%{})
+    existing_params = URI.query_decoder(uri.query || "") |> Map.new()
-    updated_params_keys = Enum.uniq(Map.keys(existing_params) ++ Map.keys(appended_params))
+    overridden_params = Map.new(overridden_params, fn {k, v} -> {to_string(k), v} end)
+    deleted_params = Enum.map(deleted_params, &to_string/1)
 
     updated_params =
-      for k <- updated_params_keys, do: {k, appended_params[k] || existing_params[k]}
+      existing_params
+      |> Map.merge(overridden_params)
+      |> Map.drop(deleted_params)
 
     uri
     |> Map.put(:query, URI.encode_query(updated_params))
     |> URI.to_string()
+    |> String.replace_suffix("?", "")
   end
 
   def maybe_add_base("/" <> uri, base), do: Path.join([base, uri])

lib/pleroma/instances/instance.ex

@@ -156,16 +156,12 @@ defmodule Pleroma.Instances.Instance do
   defp scrape_favicon(%URI{} = instance_uri) do
     try do
       with {:ok, %Tesla.Env{body: html}} <-
-             Pleroma.HTTP.get(to_string(instance_uri), [{"accept", "text/html"}],
+             Pleroma.HTTP.get(to_string(instance_uri), [{"accept", "text/html"}], pool: :media),
-               adapter: [pool: :media]
+           {_, [favicon_rel | _]} when is_binary(favicon_rel) <-
-             ),
+             {:parse,
-           favicon_rel <-
+              html |> Floki.parse_document!() |> Floki.attribute("link[rel=icon]", "href")},
-             html
+           {_, favicon} when is_binary(favicon) <-
-             |> Floki.parse_document!()
+             {:merge, URI.merge(instance_uri, favicon_rel) |> to_string()} do
-             |> Floki.attribute("link[rel=icon]", "href")
-             |> List.first(),
-           favicon <- URI.merge(instance_uri, favicon_rel) |> to_string(),
-           true <- is_binary(favicon) do
         favicon
       else
         _ -> nil

lib/pleroma/mfa/token.ex

@@ -10,10 +10,11 @@ defmodule Pleroma.MFA.Token do
   alias Pleroma.Repo
   alias Pleroma.User
   alias Pleroma.Web.OAuth.Authorization
-  alias Pleroma.Web.OAuth.Token, as: OAuthToken
 
   @expires 300
 
+  @type t() :: %__MODULE__{}
+
   schema "mfa_tokens" do
     field(:token, :string)
     field(:valid_until, :naive_datetime_usec)
@@ -24,6 +25,7 @@ defmodule Pleroma.MFA.Token do
     timestamps()
   end
 
+  @spec get_by_token(String.t()) :: {:ok, t()} | {:error, :not_found}
   def get_by_token(token) do
     from(
       t in __MODULE__,
@@ -33,33 +35,40 @@ defmodule Pleroma.MFA.Token do
     |> Repo.find_resource()
   end
 
-  def validate(token) do
+  @spec validate(String.t()) :: {:ok, t()} | {:error, :not_found} | {:error, :expired_token}
-    with {:fetch_token, {:ok, token}} <- {:fetch_token, get_by_token(token)},
+  def validate(token_str) do
-         {:expired, false} <- {:expired, is_expired?(token)} do
+    with {:ok, token} <- get_by_token(token_str),
+         false <- expired?(token) do
       {:ok, token}
-    else
-      {:expired, _} -> {:error, :expired_token}
-      {:fetch_token, _} -> {:error, :not_found}
-      error -> {:error, error}
     end
   end
 
-  def create_token(%User{} = user) do
+  defp expired?(%__MODULE__{valid_until: valid_until}) do
-    %__MODULE__{}
+    with true <- NaiveDateTime.diff(NaiveDateTime.utc_now(), valid_until) > 0 do
-    |> change
+      {:error, :expired_token}
-    |> assign_user(user)
+    end
-    |> put_token
-    |> put_valid_until
-    |> Repo.insert()
   end
 
-  def create_token(user, authorization) do
+  @spec create(User.t(), Authorization.t() | nil) :: {:ok, t()} | {:error, Ecto.Changeset.t()}
+  def create(user, authorization \\ nil) do
+    with {:ok, token} <- do_create(user, authorization) do
+      Pleroma.Workers.PurgeExpiredToken.enqueue(%{
+        token_id: token.id,
+        valid_until: DateTime.from_naive!(token.valid_until, "Etc/UTC"),
+        mod: __MODULE__
+      })
+
+      {:ok, token}
+    end
+  end
+
+  defp do_create(user, authorization) do
     %__MODULE__{}
-    |> change
+    |> change()
     |> assign_user(user)
-    |> assign_authorization(authorization)
+    |> maybe_assign_authorization(authorization)
-    |> put_token
+    |> put_token()
-    |> put_valid_until
+    |> put_valid_until()
     |> Repo.insert()
   end
 
@@ -69,15 +78,19 @@ defmodule Pleroma.MFA.Token do
     |> validate_required([:user])
   end
 
-  defp assign_authorization(changeset, authorization) do
+  defp maybe_assign_authorization(changeset, %Authorization{} = authorization) do
     changeset
     |> put_assoc(:authorization, authorization)
     |> validate_required([:authorization])
   end
 
+  defp maybe_assign_authorization(changeset, _), do: changeset
+
   defp put_token(changeset) do
+    token = Pleroma.Web.OAuth.Token.Utils.generate_token()
+
     changeset
-    |> change(%{token: OAuthToken.Utils.generate_token()})
+    |> change(%{token: token})
     |> validate_required([:token])
     |> unique_constraint(:token)
   end
@@ -89,18 +102,4 @@ defmodule Pleroma.MFA.Token do
     |> change(%{valid_until: expires_in})
     |> validate_required([:valid_until])
   end
-
-  def is_expired?(%__MODULE__{valid_until: valid_until}) do
-    NaiveDateTime.diff(NaiveDateTime.utc_now(), valid_until) > 0
-  end
-
-  def is_expired?(_), do: false
-
-  def delete_expired_tokens do
-    from(
-      q in __MODULE__,
-      where: fragment("?", q.valid_until) < ^Timex.now()
-    )
-    |> Repo.delete_all()
-  end
 end

lib/pleroma/migration_helper/notification_backfill.ex

@@ -19,13 +19,13 @@ defmodule Pleroma.MigrationHelper.NotificationBackfill do
     query
     |> Repo.chunk_stream(100)
     |> Enum.each(fn notification ->
-      type =
+      if notification.activity do
-        notification.activity
+        type = type_from_activity(notification.activity)
-        |> type_from_activity()
 
         notification
         |> Ecto.Changeset.change(%{type: type})
         |> Repo.update()
+      end
     end)
   end
 
@@ -72,8 +72,7 @@ defmodule Pleroma.MigrationHelper.NotificationBackfill do
         "pleroma:emoji_reaction"
 
       "Create" ->
-        activity
+        type_from_activity_object(activity)
-        |> type_from_activity_object()
 
       t ->
         raise "No notification type for activity type #{t}"

lib/pleroma/moderation_log.ex

@@ -320,6 +320,19 @@ defmodule Pleroma.ModerationLog do
     |> insert_log_entry_with_message()
   end
 
+  @spec insert_log(%{actor: User, action: String.t(), subject_id: String.t()}) ::
+          {:ok, ModerationLog} | {:error, any}
+  def insert_log(%{actor: %User{} = actor, action: "chat_message_delete", subject_id: subject_id}) do
+    %ModerationLog{
+      data: %{
+        "actor" => %{"nickname" => actor.nickname},
+        "action" => "chat_message_delete",
+        "subject_id" => subject_id
+      }
+    }
+    |> insert_log_entry_with_message()
+  end
+
   @spec insert_log_entry_with_message(ModerationLog) :: {:ok, ModerationLog} | {:error, any}
   defp insert_log_entry_with_message(entry) do
     entry.data["message"]
@@ -627,6 +640,17 @@ defmodule Pleroma.ModerationLog do
     "@#{actor_nickname} updated users: #{users_to_nicknames_string(subjects)}"
   end
 
+  @spec get_log_entry_message(ModerationLog) :: String.t()
+  def get_log_entry_message(%ModerationLog{
+        data: %{
+          "actor" => %{"nickname" => actor_nickname},
+          "action" => "chat_message_delete",
+          "subject_id" => subject_id
+        }
+      }) do
+    "@#{actor_nickname} deleted chat message ##{subject_id}"
+  end
+
   defp nicknames_to_string(nicknames) do
     nicknames
     |> Enum.map(&"@#{&1}")

lib/pleroma/object/containment.ex

@@ -44,13 +44,6 @@ defmodule Pleroma.Object.Containment do
     nil
   end
 
-  # TODO: We explicitly allow 'tag' URIs through, due to references to legacy OStatus
-  # objects being present in the test suite environment.  Once these objects are
-  # removed, please also remove this.
-  if Mix.env() == :test do
-    defp compare_uris(_, %URI{scheme: "tag"}), do: :ok
-  end
-
   defp compare_uris(%URI{host: host} = _id_uri, %URI{host: host} = _other_uri), do: :ok
   defp compare_uris(_id_uri, _other_uri), do: :error
 

lib/pleroma/object/fetcher.ex

@@ -12,6 +12,7 @@ defmodule Pleroma.Object.Fetcher do
   alias Pleroma.Web.ActivityPub.ObjectValidator
   alias Pleroma.Web.ActivityPub.Transmogrifier
   alias Pleroma.Web.Federator
+  alias Pleroma.Web.FedSockets
 
   require Logger
   require Pleroma.Constants
@@ -98,8 +99,8 @@ defmodule Pleroma.Object.Fetcher do
       {:containment, _} ->
         {:error, "Object containment failed."}
 
-      {:transmogrifier, {:error, {:reject, nil}}} ->
+      {:transmogrifier, {:error, {:reject, e}}} ->
-        {:reject, nil}
+        {:reject, e}
 
       {:transmogrifier, _} = e ->
         {:error, e}
@@ -182,27 +183,20 @@ defmodule Pleroma.Object.Fetcher do
     end
   end
 
-  def fetch_and_contain_remote_object_from_id(id) when is_binary(id) do
+  def fetch_and_contain_remote_object_from_id(prm, opts \\ [])
+
+  def fetch_and_contain_remote_object_from_id(%{"id" => id}, opts),
+    do: fetch_and_contain_remote_object_from_id(id, opts)
+
+  def fetch_and_contain_remote_object_from_id(id, opts) when is_binary(id) do
     Logger.debug("Fetching object #{id} via AP")
 
-    date = Pleroma.Signature.signed_date()
-
-    headers =
-      [{"accept", "application/activity+json"}]
-      |> maybe_date_fetch(date)
-      |> sign_fetch(id, date)
-
-    Logger.debug("Fetch headers: #{inspect(headers)}")
-
     with {:scheme, true} <- {:scheme, String.starts_with?(id, "http")},
-         {:ok, %{body: body, status: code}} when code in 200..299 <- HTTP.get(id, headers),
+         {:ok, body} <- get_object(id, opts),
-         {:ok, data} <- Jason.decode(body),
+         {:ok, data} <- safe_json_decode(body),
          :ok <- Containment.contain_origin_from_id(id, data) do
       {:ok, data}
     else
-      {:ok, %{status: code}} when code in [404, 410] ->
-        {:error, "Object has been deleted"}
-
       {:scheme, _} ->
         {:error, "Unsupported URI scheme"}
 
@@ -214,8 +208,44 @@ defmodule Pleroma.Object.Fetcher do
     end
   end
 
-  def fetch_and_contain_remote_object_from_id(%{"id" => id}),
+  def fetch_and_contain_remote_object_from_id(_id, _opts),
-    do: fetch_and_contain_remote_object_from_id(id)
+    do: {:error, "id must be a string"}
 
-  def fetch_and_contain_remote_object_from_id(_id), do: {:error, "id must be a string"}
+  defp get_object(id, opts) do
+    with false <- Keyword.get(opts, :force_http, false),
+         {:ok, fedsocket} <- FedSockets.get_or_create_fed_socket(id) do
+      Logger.debug("fetching via fedsocket - #{inspect(id)}")
+      FedSockets.fetch(fedsocket, id)
+    else
+      _other ->
+        Logger.debug("fetching via http - #{inspect(id)}")
+        get_object_http(id)
+    end
+  end
+
+  defp get_object_http(id) do
+    date = Pleroma.Signature.signed_date()
+
+    headers =
+      [{"accept", "application/activity+json"}]
+      |> maybe_date_fetch(date)
+      |> sign_fetch(id, date)
+
+    case HTTP.get(id, headers) do
+      {:ok, %{body: body, status: code}} when code in 200..299 ->
+        {:ok, body}
+
+      {:ok, %{status: code}} when code in [404, 410] ->
+        {:error, "Object has been deleted"}
+
+      {:error, e} ->
+        {:error, e}
+
+      e ->
+        {:error, e}
+    end
+  end
+
+  defp safe_json_decode(nil), do: {:ok, nil}
+  defp safe_json_decode(json), do: Jason.decode(json)
 end

lib/pleroma/plugs/oauth_scopes_plug.ex

@@ -53,7 +53,7 @@ defmodule Pleroma.Plugs.OAuthScopesPlug do
     |> assign(:token, nil)
   end
 
-  @doc "Filters descendants of supported scopes"
+  @doc "Keeps those of `scopes` which are descendants of `supported_scopes`"
   def filter_descendants(scopes, supported_scopes) do
     Enum.filter(
       scopes,

lib/pleroma/repo.ex

@@ -49,7 +49,21 @@ defmodule Pleroma.Repo do
     end
   end
 
-  def chunk_stream(query, chunk_size) do
+  @doc """
+  Returns a lazy enumerable that emits all entries from the data store matching the given query.
+
+  `returns_as` use to group records. use the `batches` option to fetch records in bulk.
+
+  ## Examples
+
+  # fetch records one-by-one
+  iex> Pleroma.Repo.chunk_stream(Pleroma.Activity.Queries.by_actor(ap_id), 500)
+
+  # fetch records in bulk
+  iex> Pleroma.Repo.chunk_stream(Pleroma.Activity.Queries.by_actor(ap_id), 500, :batches)
+  """
+  @spec chunk_stream(Ecto.Query.t(), integer(), atom()) :: Enumerable.t()
+  def chunk_stream(query, chunk_size, returns_as \\ :one) do
     # We don't actually need start and end funcitons of resource streaming,
     # but it seems to be the only way to not fetch records one-by-one and
     # have individual records be the elements of the stream, instead of
@@ -69,7 +83,12 @@ defmodule Pleroma.Repo do
 
             records ->
               last_id = List.last(records).id
+
+              if returns_as == :one do
                 {records, last_id}
+              else
+                {[records], last_id}
+              end
           end
       end,
       fn _ -> :ok end

lib/pleroma/repo_streamer.ex

@@ -1,34 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.RepoStreamer do
-  alias Pleroma.Repo
-  import Ecto.Query
-
-  def chunk_stream(query, chunk_size) do
-    Stream.unfold(0, fn
-      :halt ->
-        {[], :halt}
-
-      last_id ->
-        query
-        |> order_by(asc: :id)
-        |> where([r], r.id > ^last_id)
-        |> limit(^chunk_size)
-        |> Repo.all()
-        |> case do
-          [] ->
-            {[], :halt}
-
-          records ->
-            last_id = List.last(records).id
-            {records, last_id}
-        end
-    end)
-    |> Stream.take_while(fn
-      [] -> false
-      _ -> true
-    end)
-  end
-end

lib/pleroma/reverse_proxy/client/tesla.ex

@@ -28,7 +28,7 @@ defmodule Pleroma.ReverseProxy.Client.Tesla do
              url,
              body,
              headers,
-             Keyword.put(opts, :adapter, opts)
+             opts
            ) do
       if is_map(response.body) and method != :head do
         {:ok, response.status, response.headers, response.body}

lib/pleroma/reverse_proxy/reverse_proxy.ex

@@ -17,6 +17,9 @@ defmodule Pleroma.ReverseProxy do
   @failed_request_ttl :timer.seconds(60)
   @methods ~w(GET HEAD)
 
+  def max_read_duration_default, do: @max_read_duration
+  def default_cache_control_header, do: @default_cache_control_header
+
   @moduledoc """
   A reverse proxy.
 
@@ -391,6 +394,8 @@ defmodule Pleroma.ReverseProxy do
 
   defp body_size_constraint(_, _), do: :ok
 
+  defp check_read_duration(nil = _duration, max), do: check_read_duration(@max_read_duration, max)
+
   defp check_read_duration(duration, max)
        when is_integer(duration) and is_integer(max) and max > 0 do
     if duration > max do

lib/pleroma/signature.ex

@@ -39,7 +39,7 @@ defmodule Pleroma.Signature do
   def fetch_public_key(conn) do
     with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
          {:ok, actor_id} <- key_id_to_actor_id(kid),
-         {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
+         {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id, force_http: true) do
       {:ok, public_key}
     else
       e ->
@@ -50,8 +50,8 @@ defmodule Pleroma.Signature do
   def refetch_public_key(conn) do
     with %{"keyId" => kid} <- HTTPSignatures.signature_for_conn(conn),
          {:ok, actor_id} <- key_id_to_actor_id(kid),
-         {:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id),
+         {:ok, _user} <- ActivityPub.make_user_from_ap_id(actor_id, force_http: true),
-         {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id) do
+         {:ok, public_key} <- User.get_public_key_for_ap_id(actor_id, force_http: true) do
       {:ok, public_key}
     else
       e ->

lib/pleroma/telemetry/logger.ex

@@ -7,7 +7,8 @@ defmodule Pleroma.Telemetry.Logger do
     [:pleroma, :connection_pool, :reclaim, :start],
     [:pleroma, :connection_pool, :reclaim, :stop],
     [:pleroma, :connection_pool, :provision_failure],
-    [:pleroma, :connection_pool, :client_death]
+    [:pleroma, :connection_pool, :client, :dead],
+    [:pleroma, :connection_pool, :client, :add]
   ]
   def attach do
     :telemetry.attach_many("pleroma-logger", @events, &handle_event/4, [])
@@ -62,7 +63,7 @@ defmodule Pleroma.Telemetry.Logger do
   end
 
   def handle_event(
-        [:pleroma, :connection_pool, :client_death],
+        [:pleroma, :connection_pool, :client, :dead],
         %{client_pid: client_pid, reason: reason},
         %{key: key},
         _
@@ -73,4 +74,17 @@ defmodule Pleroma.Telemetry.Logger do
       }"
     end)
   end
+
+  def handle_event(
+        [:pleroma, :connection_pool, :client, :add],
+        %{clients: [_, _ | _] = clients},
+        %{key: key, protocol: :http},
+        _
+      ) do
+    Logger.info(fn ->
+      "Pool worker for #{key}: #{length(clients)} clients are using an HTTP1 connection at the same time, head-of-line blocking might occur."
+    end)
+  end
+
+  def handle_event([:pleroma, :connection_pool, :client, :add], _, _, _), do: :ok
 end

lib/pleroma/user.ex

@@ -25,7 +25,6 @@ defmodule Pleroma.User do
   alias Pleroma.Object
   alias Pleroma.Registration
   alias Pleroma.Repo
-  alias Pleroma.RepoStreamer
   alias Pleroma.User
   alias Pleroma.UserRelationship
   alias Pleroma.Web
@@ -276,9 +275,9 @@ defmodule Pleroma.User do
   @spec account_status(User.t()) :: account_status()
   def account_status(%User{deactivated: true}), do: :deactivated
   def account_status(%User{password_reset_pending: true}), do: :password_reset_pending
-  def account_status(%User{approval_pending: true}), do: :approval_pending
+  def account_status(%User{local: true, approval_pending: true}), do: :approval_pending
 
-  def account_status(%User{confirmation_pending: true}) do
+  def account_status(%User{local: true, confirmation_pending: true}) do
     if Config.get([:instance, :account_activation_required]) do
       :confirmation_pending
     else
@@ -1686,42 +1685,6 @@ defmodule Pleroma.User do
 
   def perform(:deactivate_async, user, status), do: deactivate(user, status)
 
-  @spec perform(atom(), User.t(), list()) :: list() | {:error, any()}
-  def perform(:blocks_import, %User{} = blocker, blocked_identifiers)
-      when is_list(blocked_identifiers) do
-    Enum.map(
-      blocked_identifiers,
-      fn blocked_identifier ->
-        with {:ok, %User{} = blocked} <- get_or_fetch(blocked_identifier),
-             {:ok, _block} <- CommonAPI.block(blocker, blocked) do
-          blocked
-        else
-          err ->
-            Logger.debug("blocks_import failed for #{blocked_identifier} with: #{inspect(err)}")
-            err
-        end
-      end
-    )
-  end
-
-  def perform(:follow_import, %User{} = follower, followed_identifiers)
-      when is_list(followed_identifiers) do
-    Enum.map(
-      followed_identifiers,
-      fn followed_identifier ->
-        with {:ok, %User{} = followed} <- get_or_fetch(followed_identifier),
-             {:ok, follower} <- maybe_direct_follow(follower, followed),
-             {:ok, _, _, _} <- CommonAPI.follow(follower, followed) do
-          followed
-        else
-          err ->
-            Logger.debug("follow_import failed for #{followed_identifier} with: #{inspect(err)}")
-            err
-        end
-      end
-    )
-  end
-
   @spec external_users_query() :: Ecto.Query.t()
   def external_users_query do
     User.Query.build(%{
@@ -1750,21 +1713,6 @@ defmodule Pleroma.User do
     Repo.all(query)
   end
 
-  def blocks_import(%User{} = blocker, blocked_identifiers) when is_list(blocked_identifiers) do
-    BackgroundWorker.enqueue("blocks_import", %{
-      "blocker_id" => blocker.id,
-      "blocked_identifiers" => blocked_identifiers
-    })
-  end
-
-  def follow_import(%User{} = follower, followed_identifiers)
-      when is_list(followed_identifiers) do
-    BackgroundWorker.enqueue("follow_import", %{
-      "follower_id" => follower.id,
-      "followed_identifiers" => followed_identifiers
-    })
-  end
-
   def delete_notifications_from_user_activities(%User{ap_id: ap_id}) do
     Notification
     |> join(:inner, [n], activity in assoc(n, :activity))
@@ -1775,7 +1723,7 @@ defmodule Pleroma.User do
   def delete_user_activities(%User{ap_id: ap_id} = user) do
     ap_id
     |> Activity.Queries.by_actor()
-    |> RepoStreamer.chunk_stream(50)
+    |> Repo.chunk_stream(50, :batches)
     |> Stream.each(fn activities ->
       Enum.each(activities, fn activity -> delete_activity(activity, user) end)
     end)
@@ -1821,12 +1769,12 @@ defmodule Pleroma.User do
 
   def html_filter_policy(_), do: Config.get([:markup, :scrub_policy])
 
-  def fetch_by_ap_id(ap_id), do: ActivityPub.make_user_from_ap_id(ap_id)
+  def fetch_by_ap_id(ap_id, opts \\ []), do: ActivityPub.make_user_from_ap_id(ap_id, opts)
 
-  def get_or_fetch_by_ap_id(ap_id) do
+  def get_or_fetch_by_ap_id(ap_id, opts \\ []) do
     cached_user = get_cached_by_ap_id(ap_id)
 
-    maybe_fetched_user = needs_update?(cached_user) && fetch_by_ap_id(ap_id)
+    maybe_fetched_user = needs_update?(cached_user) && fetch_by_ap_id(ap_id, opts)
 
     case {cached_user, maybe_fetched_user} do
       {_, {:ok, %User{} = user}} ->
@@ -1899,8 +1847,8 @@ defmodule Pleroma.User do
 
   def public_key(_), do: {:error, "key not found"}
 
-  def get_public_key_for_ap_id(ap_id) do
+  def get_public_key_for_ap_id(ap_id, opts \\ []) do
-    with {:ok, %User{} = user} <- get_or_fetch_by_ap_id(ap_id),
+    with {:ok, %User{} = user} <- get_or_fetch_by_ap_id(ap_id, opts),
          {:ok, public_key} <- public_key(user) do
       {:ok, public_key}
     else
@@ -2315,6 +2263,11 @@ defmodule Pleroma.User do
       max_pinned_statuses = Config.get([:instance, :max_pinned_statuses], 0)
       params = %{pinned_activities: user.pinned_activities ++ [id]}
 
+      # if pinned activity was scheduled for deletion, we remove job
+      if expiration = Pleroma.Workers.PurgeExpiredActivity.get_expiration(id) do
+        Oban.cancel_job(expiration.id)
+      end
+
       user
       |> cast(params, [:pinned_activities])
       |> validate_length(:pinned_activities,
@@ -2327,9 +2280,19 @@ defmodule Pleroma.User do
     |> update_and_set_cache()
   end
 
-  def remove_pinnned_activity(user, %Pleroma.Activity{id: id}) do
+  def remove_pinnned_activity(user, %Pleroma.Activity{id: id, data: data}) do
     params = %{pinned_activities: List.delete(user.pinned_activities, id)}
 
+    # if pinned activity was scheduled for deletion, we reschedule it for deletion
+    if data["expires_at"] do
+      {:ok, expires_at, _} = DateTime.from_iso8601(data["expires_at"])
+
+      Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
+        activity_id: id,
+        expires_at: expires_at
+      })
+    end
+
     user
     |> cast(params, [:pinned_activities])
     |> update_and_set_cache()

lib/pleroma/user/import.ex

@@ -0,0 +1,85 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.User.Import do
+  use Ecto.Schema
+
+  alias Pleroma.User
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Workers.BackgroundWorker
+
+  require Logger
+
+  @spec perform(atom(), User.t(), list()) :: :ok | list() | {:error, any()}
+  def perform(:mutes_import, %User{} = user, [_ | _] = identifiers) do
+    Enum.map(
+      identifiers,
+      fn identifier ->
+        with {:ok, %User{} = muted_user} <- User.get_or_fetch(identifier),
+             {:ok, _} <- User.mute(user, muted_user) do
+          muted_user
+        else
+          error -> handle_error(:mutes_import, identifier, error)
+        end
+      end
+    )
+  end
+
+  def perform(:blocks_import, %User{} = blocker, [_ | _] = identifiers) do
+    Enum.map(
+      identifiers,
+      fn identifier ->
+        with {:ok, %User{} = blocked} <- User.get_or_fetch(identifier),
+             {:ok, _block} <- CommonAPI.block(blocker, blocked) do
+          blocked
+        else
+          error -> handle_error(:blocks_import, identifier, error)
+        end
+      end
+    )
+  end
+
+  def perform(:follow_import, %User{} = follower, [_ | _] = identifiers) do
+    Enum.map(
+      identifiers,
+      fn identifier ->
+        with {:ok, %User{} = followed} <- User.get_or_fetch(identifier),
+             {:ok, follower} <- User.maybe_direct_follow(follower, followed),
+             {:ok, _, _, _} <- CommonAPI.follow(follower, followed) do
+          followed
+        else
+          error -> handle_error(:follow_import, identifier, error)
+        end
+      end
+    )
+  end
+
+  def perform(_, _, _), do: :ok
+
+  defp handle_error(op, user_id, error) do
+    Logger.debug("#{op} failed for #{user_id} with: #{inspect(error)}")
+    error
+  end
+
+  def blocks_import(%User{} = blocker, [_ | _] = identifiers) do
+    BackgroundWorker.enqueue(
+      "blocks_import",
+      %{"user_id" => blocker.id, "identifiers" => identifiers}
+    )
+  end
+
+  def follow_import(%User{} = follower, [_ | _] = identifiers) do
+    BackgroundWorker.enqueue(
+      "follow_import",
+      %{"user_id" => follower.id, "identifiers" => identifiers}
+    )
+  end
+
+  def mutes_import(%User{} = user, [_ | _] = identifiers) do
+    BackgroundWorker.enqueue(
+      "mutes_import",
+      %{"user_id" => user.id, "identifiers" => identifiers}
+    )
+  end
+end

lib/pleroma/user/search.ex

@@ -52,6 +52,7 @@ defmodule Pleroma.User.Search do
     |> base_query(following)
     |> filter_blocked_user(for_user)
     |> filter_invisible_users()
+    |> filter_discoverable_users()
     |> filter_internal_users()
     |> filter_blocked_domains(for_user)
     |> fts_search(query_string)
@@ -122,6 +123,10 @@ defmodule Pleroma.User.Search do
     from(q in query, where: q.invisible == false)
   end
 
+  defp filter_discoverable_users(query) do
+    from(q in query, where: q.discoverable == true)
+  end
+
   defp filter_internal_users(query) do
     from(q in query, where: q.actor_type != "Application")
   end

lib/pleroma/web/activity_pub/activity_pub.ex

@@ -5,7 +5,6 @@
 defmodule Pleroma.Web.ActivityPub.ActivityPub do
   alias Pleroma.Activity
   alias Pleroma.Activity.Ir.Topics
-  alias Pleroma.ActivityExpiration
   alias Pleroma.Config
   alias Pleroma.Constants
   alias Pleroma.Conversation
@@ -85,7 +84,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   defp increase_replies_count_if_reply(_create_data), do: :noop
 
-  @object_types ~w[ChatMessage Question Answer Audio Event]
+  @object_types ~w[ChatMessage Question Answer Audio Video Event Article]
   @spec persist(map(), keyword()) :: {:ok, Activity.t() | Object.t()}
   def persist(%{"type" => type} = object, meta) when type in @object_types do
     with {:ok, object} <- Object.create(object) do
@@ -102,7 +101,9 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
              local: local,
              recipients: recipients,
              actor: object["actor"]
-           }) do
+           }),
+         # TODO: add tests for expired activities, when Note type will be supported in new pipeline
+         {:ok, _} <- maybe_create_activity_expiration(activity) do
       {:ok, activity, meta}
     end
   end
@@ -111,23 +112,14 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   def insert(map, local \\ true, fake \\ false, bypass_actor_check \\ false) when is_map(map) do
     with nil <- Activity.normalize(map),
          map <- lazy_put_activity_defaults(map, fake),
-         true <- bypass_actor_check || check_actor_is_active(map["actor"]),
+         {_, true} <- {:actor_check, bypass_actor_check || check_actor_is_active(map["actor"])},
-         {_, true} <- {:remote_limit_error, check_remote_limit(map)},
+         {_, true} <- {:remote_limit_pass, check_remote_limit(map)},
          {:ok, map} <- MRF.filter(map),
          {recipients, _, _} = get_recipients(map),
          {:fake, false, map, recipients} <- {:fake, fake, map, recipients},
          {:containment, :ok} <- {:containment, Containment.contain_child(map)},
-         {:ok, map, object} <- insert_full_object(map) do
+         {:ok, map, object} <- insert_full_object(map),
-      {:ok, activity} =
+         {:ok, activity} <- insert_activity_with_expiration(map, local, recipients) do
-        %Activity{
-          data: map,
-          local: local,
-          actor: map["actor"],
-          recipients: recipients
-        }
-        |> Repo.insert()
-        |> maybe_create_activity_expiration()
-
       # Splice in the child object if we have one.
       activity = Maps.put_if_present(activity, :object, object)
 
@@ -138,6 +130,15 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
       %Activity{} = activity ->
         {:ok, activity}
 
+      {:actor_check, _} ->
+        {:error, false}
+
+      {:containment, _} = error ->
+        error
+
+      {:error, _} = error ->
+        error
+
       {:fake, true, map, recipients} ->
         activity = %Activity{
           data: map,
@@ -150,8 +151,24 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
         Pleroma.Web.RichMedia.Helpers.fetch_data_for_activity(activity)
         {:ok, activity}
 
-      error ->
+      {:remote_limit_pass, _} ->
-        {:error, error}
+        {:error, :remote_limit}
+
+      {:reject, _} = e ->
+        {:error, e}
+    end
+  end
+
+  defp insert_activity_with_expiration(data, local, recipients) do
+    struct = %Activity{
+      data: data,
+      local: local,
+      actor: data["actor"],
+      recipients: recipients
+    }
+
+    with {:ok, activity} <- Repo.insert(struct) do
+      maybe_create_activity_expiration(activity)
     end
   end
 
@@ -164,13 +181,19 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     stream_out_participations(participations)
   end
 
-  defp maybe_create_activity_expiration({:ok, %{data: %{"expires_at" => expires_at}} = activity}) do
+  defp maybe_create_activity_expiration(
-    with {:ok, _} <- ActivityExpiration.create(activity, expires_at) do
+         %{data: %{"expires_at" => %DateTime{} = expires_at}} = activity
+       ) do
+    with {:ok, _job} <-
+           Pleroma.Workers.PurgeExpiredActivity.enqueue(%{
+             activity_id: activity.id,
+             expires_at: expires_at
+           }) do
       {:ok, activity}
     end
   end
 
-  defp maybe_create_activity_expiration(result), do: result
+  defp maybe_create_activity_expiration(activity), do: {:ok, activity}
 
   defp create_or_bump_conversation(activity, actor) do
     with {:ok, conversation} <- Conversation.create_or_bump_for(activity),
@@ -744,7 +767,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   defp restrict_replies(query, %{
-         reply_filtering_user: user,
+         reply_filtering_user: %User{} = user,
          reply_visibility: "self"
        }) do
     from(
@@ -760,7 +783,7 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
   end
 
   defp restrict_replies(query, %{
-         reply_filtering_user: user,
+         reply_filtering_user: %User{} = user,
          reply_visibility: "following"
        }) do
     from(
@@ -818,7 +841,14 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     from(
       [activity, object: o] in query,
       where: fragment("not (? = ANY(?))", activity.actor, ^blocked_ap_ids),
-      where: fragment("not (? && ?)", activity.recipients, ^blocked_ap_ids),
+      where:
+        fragment(
+          "((not (? && ?)) or ? = ?)",
+          activity.recipients,
+          ^blocked_ap_ids,
+          activity.actor,
+          ^user.ap_id
+        ),
       where:
         fragment(
           "recipients_contain_blocked_domains(?, ?) = false",
@@ -1247,10 +1277,12 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
 
   def fetch_follow_information_for_user(user) do
     with {:ok, following_data} <-
-           Fetcher.fetch_and_contain_remote_object_from_id(user.following_address),
+           Fetcher.fetch_and_contain_remote_object_from_id(user.following_address,
+             force_http: true
+           ),
          {:ok, hide_follows} <- collection_private(following_data),
          {:ok, followers_data} <-
-           Fetcher.fetch_and_contain_remote_object_from_id(user.follower_address),
+           Fetcher.fetch_and_contain_remote_object_from_id(user.follower_address, force_http: true),
          {:ok, hide_followers} <- collection_private(followers_data) do
       {:ok,
        %{
@@ -1324,8 +1356,8 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     end
   end
 
-  def fetch_and_prepare_user_from_ap_id(ap_id) do
+  def fetch_and_prepare_user_from_ap_id(ap_id, opts \\ []) do
-    with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id),
+    with {:ok, data} <- Fetcher.fetch_and_contain_remote_object_from_id(ap_id, opts),
          {:ok, data} <- user_data_from_user_object(data) do
       {:ok, maybe_update_follow_information(data)}
     else
@@ -1367,13 +1399,13 @@ defmodule Pleroma.Web.ActivityPub.ActivityPub do
     end
   end
 
-  def make_user_from_ap_id(ap_id) do
+  def make_user_from_ap_id(ap_id, opts \\ []) do
     user = User.get_cached_by_ap_id(ap_id)
 
     if user && !User.ap_enabled?(user) do
       Transmogrifier.upgrade_user_from_ap_id(ap_id)
     else
-      with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id) do
+      with {:ok, data} <- fetch_and_prepare_user_from_ap_id(ap_id, opts) do
         if user do
           user
           |> User.remote_user_changeset(data)

lib/pleroma/web/activity_pub/mrf.ex

@@ -5,16 +5,34 @@
 defmodule Pleroma.Web.ActivityPub.MRF do
   @callback filter(Map.t()) :: {:ok | :reject, Map.t()}
 
-  def filter(policies, %{} = object) do
+  def filter(policies, %{} = message) do
     policies
-    |> Enum.reduce({:ok, object}, fn
+    |> Enum.reduce({:ok, message}, fn
-      policy, {:ok, object} -> policy.filter(object)
+      policy, {:ok, message} -> policy.filter(message)
       _, error -> error
     end)
   end
 
   def filter(%{} = object), do: get_policies() |> filter(object)
 
+  def pipeline_filter(%{} = message, meta) do
+    object = meta[:object_data]
+    ap_id = message["object"]
+
+    if object && ap_id do
+      with {:ok, message} <- filter(Map.put(message, "object", object)) do
+        meta = Keyword.put(meta, :object_data, message["object"])
+        {:ok, Map.put(message, "object", ap_id), meta}
+      else
+        {err, message} -> {err, message, meta}
+      end
+    else
+      {err, message} = filter(message)
+
+      {err, message, meta}
+    end
+  end
+
   def get_policies do
     Pleroma.Config.get([:mrf, :policies], []) |> get_policies()
   end

lib/pleroma/web/activity_pub/mrf/activity_expiration_policy.ex

@@ -31,10 +31,10 @@ defmodule Pleroma.Web.ActivityPub.MRF.ActivityExpirationPolicy do
 
   defp maybe_add_expiration(activity) do
     days = Pleroma.Config.get([:mrf_activity_expiration, :days], 365)
-    expires_at = NaiveDateTime.utc_now() |> Timex.shift(days: days)
+    expires_at = DateTime.utc_now() |> Timex.shift(days: days)
 
     with %{"expires_at" => existing_expires_at} <- activity,
-         :lt <- NaiveDateTime.compare(existing_expires_at, expires_at) do
+         :lt <- DateTime.compare(existing_expires_at, expires_at) do
       activity
     else
       _ -> Map.put(activity, "expires_at", expires_at)

lib/pleroma/web/activity_pub/mrf/keyword_policy.ex

@@ -20,9 +20,17 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
     String.match?(string, pattern)
   end
 
-  defp check_reject(%{"object" => %{"content" => content, "summary" => summary}} = message) do
+  defp object_payload(%{} = object) do
+    [object["content"], object["summary"], object["name"]]
+    |> Enum.filter(& &1)
+    |> Enum.join("\n")
+  end
+
+  defp check_reject(%{"object" => %{} = object} = message) do
+    payload = object_payload(object)
+
     if Enum.any?(Pleroma.Config.get([:mrf_keyword, :reject]), fn pattern ->
-         string_matches?(content, pattern) or string_matches?(summary, pattern)
+         string_matches?(payload, pattern)
        end) do
       {:reject, "[KeywordPolicy] Matches with rejected keyword"}
     else
@@ -30,12 +38,12 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
     end
   end
 
-  defp check_ftl_removal(
+  defp check_ftl_removal(%{"to" => to, "object" => %{} = object} = message) do
-         %{"to" => to, "object" => %{"content" => content, "summary" => summary}} = message
+    payload = object_payload(object)
-       ) do
+
     if Pleroma.Constants.as_public() in to and
          Enum.any?(Pleroma.Config.get([:mrf_keyword, :federated_timeline_removal]), fn pattern ->
-           string_matches?(content, pattern) or string_matches?(summary, pattern)
+           string_matches?(payload, pattern)
          end) do
       to = List.delete(to, Pleroma.Constants.as_public())
       cc = [Pleroma.Constants.as_public() | message["cc"] || []]
@@ -51,35 +59,24 @@ defmodule Pleroma.Web.ActivityPub.MRF.KeywordPolicy do
     end
   end
 
-  defp check_replace(%{"object" => %{"content" => content, "summary" => summary}} = message) do
+  defp check_replace(%{"object" => %{} = object} = message) do
-    content =
+    object =
-      if is_binary(content) do
+      ["content", "name", "summary"]
-        content
+      |> Enum.filter(fn field -> Map.has_key?(object, field) && object[field] end)
-      else
+      |> Enum.reduce(object, fn field, object ->
-        ""
+        data =
-      end
-
-    summary =
-      if is_binary(summary) do
-        summary
-      else
-        ""
-      end
-
-    {content, summary} =
           Enum.reduce(
             Pleroma.Config.get([:mrf_keyword, :replace]),
-        {content, summary},
+            object[field],
-        fn {pattern, replacement}, {content_acc, summary_acc} ->
+            fn {pat, repl}, acc -> String.replace(acc, pat, repl) end
-          {String.replace(content_acc, pattern, replacement),
-           String.replace(summary_acc, pattern, replacement)}
-        end
           )
 
-    {:ok,
+        Map.put(object, field, data)
-     message
+      end)
-     |> put_in(["object", "content"], content)
+
-     |> put_in(["object", "summary"], summary)}
+    message = Map.put(message, "object", object)
+
+    {:ok, message}
   end
 
   @impl true

lib/pleroma/web/activity_pub/mrf/media_proxy_warming_policy.ex

@@ -12,17 +12,21 @@ defmodule Pleroma.Web.ActivityPub.MRF.MediaProxyWarmingPolicy do
 
   require Logger
 
-  @options [
+  @adapter_options [
     pool: :media,
     recv_timeout: 10_000
   ]
 
   def perform(:prefetch, url) do
-    Logger.debug("Prefetching #{inspect(url)}")
+    # Fetching only proxiable resources
+    if MediaProxy.enabled?() and MediaProxy.url_proxiable?(url) do
+      # If preview proxy is enabled, it'll also hit media proxy (so we're caching both requests)
+      prefetch_url = MediaProxy.preview_url(url)
 
-    url
+      Logger.debug("Prefetching #{inspect(url)} as #{inspect(prefetch_url)}")
-    |> MediaProxy.url()
+
-    |> HTTP.get([], @options)
+      HTTP.get(prefetch_url, [], @adapter_options)
+    end
   end
 
   def perform(:preload, %{"object" => %{"attachment" => attachments}} = _message) do

lib/pleroma/web/activity_pub/mrf/simple_policy.ex

@@ -66,7 +66,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicy do
            "type" => "Create",
            "object" => child_object
          } = object
-       ) do
+       )
+       when is_map(child_object) do
     media_nsfw =
       Config.get([:mrf_simple, :media_nsfw])
       |> MRF.subdomains_regex()

lib/pleroma/web/activity_pub/mrf/subchain_policy.ex

@@ -28,8 +28,7 @@ defmodule Pleroma.Web.ActivityPub.MRF.SubchainPolicy do
         }"
       )
 
-      subchain
+      MRF.filter(subchain, message)
-      |> MRF.filter(message)
     else
       _e -> {:ok, message}
     end

lib/pleroma/web/activity_pub/object_validator.ex

@@ -12,11 +12,13 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   alias Pleroma.Activity
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object
+  alias Pleroma.Object.Containment
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.ObjectValidators.AcceptRejectValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.AnnounceValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.AnswerValidator
-  alias Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator
+  alias Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator
+  alias Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.BlockValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.ChatMessageValidator
   alias Pleroma.Web.ActivityPub.ObjectValidators.CreateChatMessageValidator
@@ -149,10 +151,20 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     end
   end
 
-  def validate(%{"type" => "Audio"} = object, meta) do
+  def validate(%{"type" => type} = object, meta) when type in ~w[Audio Video] do
     with {:ok, object} <-
            object
-           |> AudioValidator.cast_and_validate()
+           |> AudioVideoValidator.cast_and_validate()
+           |> Ecto.Changeset.apply_action(:insert) do
+      object = stringify_keys(object)
+      {:ok, object, meta}
+    end
+  end
+
+  def validate(%{"type" => "Article"} = object, meta) do
+    with {:ok, object} <-
+           object
+           |> ArticleNoteValidator.cast_and_validate()
            |> Ecto.Changeset.apply_action(:insert) do
       object = stringify_keys(object)
       {:ok, object, meta}
@@ -198,7 +210,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
         %{"type" => "Create", "object" => %{"type" => objtype} = object} = create_activity,
         meta
       )
-      when objtype in ~w[Question Answer Audio Event] do
+      when objtype in ~w[Question Answer Audio Video Event Article] do
     with {:ok, object_data} <- cast_and_apply(object),
          meta = Keyword.put(meta, :object_data, object_data |> stringify_keys),
          {:ok, create_activity} <-
@@ -232,14 +244,18 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
     AnswerValidator.cast_and_apply(object)
   end
 
-  def cast_and_apply(%{"type" => "Audio"} = object) do
+  def cast_and_apply(%{"type" => type} = object) when type in ~w[Audio Video] do
-    AudioValidator.cast_and_apply(object)
+    AudioVideoValidator.cast_and_apply(object)
   end
 
   def cast_and_apply(%{"type" => "Event"} = object) do
     EventValidator.cast_and_apply(object)
   end
 
+  def cast_and_apply(%{"type" => "Article"} = object) do
+    ArticleNoteValidator.cast_and_apply(object)
+  end
+
   def cast_and_apply(o), do: {:error, {:validator_not_set, o}}
 
   # is_struct/1 isn't present in Elixir 1.8.x
@@ -262,7 +278,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidator do
   def stringify_keys(object), do: object
 
   def fetch_actor(object) do
-    with {:ok, actor} <- ObjectValidators.ObjectID.cast(object["actor"]) do
+    with actor <- Containment.get_actor(object),
+         {:ok, actor} <- ObjectValidators.ObjectID.cast(actor) do
       User.get_or_fetch_by_ap_id(actor)
     end
   end

lib/pleroma/web/activity_pub/object_validators/article_note_validator.ex

@@ -2,7 +2,7 @@
 # Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
 # SPDX-License-Identifier: AGPL-3.0-only
 
-defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
+defmodule Pleroma.Web.ActivityPub.ObjectValidators.ArticleNoteValidator do
   use Ecto.Schema
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
@@ -25,14 +25,19 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
     # TODO: Write type
     field(:tag, {:array, :map}, default: [])
     field(:type, :string)
+
+    field(:name, :string)
+    field(:summary, :string)
     field(:content, :string)
+
     field(:context, :string)
+    # short identifier for PleromaFE to group statuses by context
+    field(:context_id, :integer)
 
     # TODO: Remove actor on objects
     field(:actor, ObjectValidators.ObjectID)
 
     field(:attributedTo, ObjectValidators.ObjectID)
-    field(:summary, :string)
     field(:published, ObjectValidators.DateTime)
     field(:emoji, ObjectValidators.Emoji, default: %{})
     field(:sensitive, :boolean, default: false)
@@ -40,13 +45,11 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
     field(:replies_count, :integer, default: 0)
     field(:like_count, :integer, default: 0)
     field(:announcement_count, :integer, default: 0)
-    field(:inReplyTo, :string)
+    field(:inReplyTo, ObjectValidators.ObjectID)
     field(:url, ObjectValidators.Uri)
-    # short identifier for PleromaFE to group statuses by context
-    field(:context_id, :integer)
 
-    field(:likes, {:array, :string}, default: [])
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
-    field(:announcements, {:array, :string}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
   end
 
   def cast_and_apply(data) do
@@ -62,19 +65,14 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
   end
 
   def cast_data(data) do
+    data = fix(data)
+
     %__MODULE__{}
     |> changeset(data)
   end
 
-  defp fix_url(%{"url" => url} = data) when is_list(url) do
+  defp fix_url(%{"url" => url} = data) when is_map(url) do
-    attachment =
+    Map.put(data, "url", url["href"])
-      Enum.find(url, fn x -> is_map(x) and String.starts_with?(x["mimeType"], "audio/") end)
-
-    link_element = Enum.find(url, fn x -> is_map(x) and x["mimeType"] == "text/html" end)
-
-    data
-    |> Map.put("attachment", [attachment])
-    |> Map.put("url", link_element["href"])
   end
 
   defp fix_url(data), do: data
@@ -83,8 +81,9 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
     data
     |> CommonFixes.fix_defaults()
     |> CommonFixes.fix_attribution()
-    |> Transmogrifier.fix_emoji()
+    |> CommonFixes.fix_actor()
     |> fix_url()
+    |> Transmogrifier.fix_emoji()
   end
 
   def changeset(struct, data) do
@@ -97,8 +96,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioValidator do
 
   def validate_data(data_cng) do
     data_cng
-    |> validate_inclusion(:type, ["Audio"])
+    |> validate_inclusion(:type, ["Article", "Note"])
-    |> validate_required([:id, :actor, :attributedTo, :type, :context, :attachment])
+    |> validate_required([:id, :actor, :attributedTo, :type, :context, :context_id])
     |> CommonValidations.validate_any_presence([:cc, :to])
     |> CommonValidations.validate_fields_match([:actor, :attributedTo])
     |> CommonValidations.validate_actor_presence()

lib/pleroma/web/activity_pub/object_validators/attachment_validator.ex

@@ -5,6 +5,7 @@
 defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
   use Ecto.Schema
 
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Web.ActivityPub.ObjectValidators.UrlObjectValidator
 
   import Ecto.Changeset
@@ -15,7 +16,11 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
     field(:mediaType, :string, default: "application/octet-stream")
     field(:name, :string)
 
-    embeds_many(:url, UrlObjectValidator)
+    embeds_many :url, UrlObjectValidator, primary_key: false do
+      field(:type, :string)
+      field(:href, ObjectValidators.Uri)
+      field(:mediaType, :string, default: "application/octet-stream")
+    end
   end
 
   def cast_and_validate(data) do
@@ -37,7 +42,18 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
 
     struct
     |> cast(data, [:type, :mediaType, :name])
-    |> cast_embed(:url, required: true)
+    |> cast_embed(:url, with: &url_changeset/2)
+    |> validate_inclusion(:type, ~w[Link Document Audio Image Video])
+    |> validate_required([:type, :mediaType, :url])
+  end
+
+  def url_changeset(struct, data) do
+    data = fix_media_type(data)
+
+    struct
+    |> cast(data, [:type, :href, :mediaType])
+    |> validate_inclusion(:type, ["Link"])
+    |> validate_required([:type, :href, :mediaType])
   end
 
   def fix_media_type(data) do
@@ -75,6 +91,7 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator do
 
   def validate_data(cng) do
     cng
+    |> validate_inclusion(:type, ~w[Document Audio Image Video])
     |> validate_required([:mediaType, :url, :type])
   end
 end

lib/pleroma/web/activity_pub/object_validators/audio_video_validator.ex

@@ -0,0 +1,134 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ActivityPub.ObjectValidators.AudioVideoValidator do
+  use Ecto.Schema
+
+  alias Pleroma.EarmarkRenderer
+  alias Pleroma.EctoType.ActivityPub.ObjectValidators
+  alias Pleroma.Web.ActivityPub.ObjectValidators.AttachmentValidator
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
+  alias Pleroma.Web.ActivityPub.Transmogrifier
+
+  import Ecto.Changeset
+
+  @primary_key false
+  @derive Jason.Encoder
+
+  embedded_schema do
+    field(:id, ObjectValidators.ObjectID, primary_key: true)
+    field(:to, ObjectValidators.Recipients, default: [])
+    field(:cc, ObjectValidators.Recipients, default: [])
+    field(:bto, ObjectValidators.Recipients, default: [])
+    field(:bcc, ObjectValidators.Recipients, default: [])
+    # TODO: Write type
+    field(:tag, {:array, :map}, default: [])
+    field(:type, :string)
+
+    field(:name, :string)
+    field(:summary, :string)
+    field(:content, :string)
+
+    field(:context, :string)
+    # short identifier for PleromaFE to group statuses by context
+    field(:context_id, :integer)
+
+    # TODO: Remove actor on objects
+    field(:actor, ObjectValidators.ObjectID)
+
+    field(:attributedTo, ObjectValidators.ObjectID)
+    field(:published, ObjectValidators.DateTime)
+    field(:emoji, ObjectValidators.Emoji, default: %{})
+    field(:sensitive, :boolean, default: false)
+    embeds_many(:attachment, AttachmentValidator)
+    field(:replies_count, :integer, default: 0)
+    field(:like_count, :integer, default: 0)
+    field(:announcement_count, :integer, default: 0)
+    field(:inReplyTo, ObjectValidators.ObjectID)
+    field(:url, ObjectValidators.Uri)
+
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
+  end
+
+  def cast_and_apply(data) do
+    data
+    |> cast_data
+    |> apply_action(:insert)
+  end
+
+  def cast_and_validate(data) do
+    data
+    |> cast_data()
+    |> validate_data()
+  end
+
+  def cast_data(data) do
+    %__MODULE__{}
+    |> changeset(data)
+  end
+
+  defp fix_url(%{"url" => url} = data) when is_list(url) do
+    attachment =
+      Enum.find(url, fn x ->
+        mime_type = x["mimeType"] || x["mediaType"] || ""
+
+        is_map(x) and String.starts_with?(mime_type, ["video/", "audio/"])
+      end)
+
+    link_element =
+      Enum.find(url, fn x ->
+        mime_type = x["mimeType"] || x["mediaType"] || ""
+
+        is_map(x) and mime_type == "text/html"
+      end)
+
+    data
+    |> Map.put("attachment", [attachment])
+    |> Map.put("url", link_element["href"])
+  end
+
+  defp fix_url(data), do: data
+
+  defp fix_content(%{"mediaType" => "text/markdown", "content" => content} = data)
+       when is_binary(content) do
+    content =
+      content
+      |> Earmark.as_html!(%Earmark.Options{renderer: EarmarkRenderer})
+      |> Pleroma.HTML.filter_tags()
+
+    Map.put(data, "content", content)
+  end
+
+  defp fix_content(data), do: data
+
+  defp fix(data) do
+    data
+    |> CommonFixes.fix_defaults()
+    |> CommonFixes.fix_attribution()
+    |> CommonFixes.fix_actor()
+    |> Transmogrifier.fix_emoji()
+    |> fix_url()
+    |> fix_content()
+  end
+
+  def changeset(struct, data) do
+    data = fix(data)
+
+    struct
+    |> cast(data, __schema__(:fields) -- [:attachment])
+    |> cast_embed(:attachment)
+  end
+
+  def validate_data(data_cng) do
+    data_cng
+    |> validate_inclusion(:type, ["Audio", "Video"])
+    |> validate_required([:id, :actor, :attributedTo, :type, :context, :attachment])
+    |> CommonValidations.validate_any_presence([:cc, :to])
+    |> CommonValidations.validate_fields_match([:actor, :attributedTo])
+    |> CommonValidations.validate_actor_presence()
+    |> CommonValidations.validate_host_match()
+  end
+end

lib/pleroma/web/activity_pub/object_validators/common_fixes.ex

@@ -3,6 +3,7 @@
 # SPDX-License-Identifier: AGPL-3.0-only
 
 defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes do
+  alias Pleroma.Object.Containment
   alias Pleroma.Web.ActivityPub.Utils
 
   # based on Pleroma.Web.ActivityPub.Utils.lazy_put_objects_defaults
@@ -19,4 +20,12 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes do
     data
     |> Map.put_new("actor", data["attributedTo"])
   end
+
+  def fix_actor(data) do
+    actor = Containment.get_actor(data)
+
+    data
+    |> Map.put("actor", actor)
+    |> Map.put("attributedTo", actor)
+  end
 end

lib/pleroma/web/activity_pub/object_validators/create_generic_validator.ex

@@ -10,9 +10,10 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
 
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Object
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonFixes
+  alias Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
 
   import Ecto.Changeset
-  import Pleroma.Web.ActivityPub.ObjectValidators.CommonValidations
 
   @primary_key false
 
@@ -75,14 +76,15 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.CreateGenericValidator do
     data
     |> fix_context(meta)
     |> fix_addressing(meta)
+    |> CommonFixes.fix_actor()
   end
 
   def validate_data(cng, meta \\ []) do
     cng
     |> validate_required([:actor, :type, :object])
     |> validate_inclusion(:type, ["Create"])
-    |> validate_actor_presence()
+    |> CommonValidations.validate_actor_presence()
-    |> validate_any_presence([:to, :cc])
+    |> CommonValidations.validate_any_presence([:to, :cc])
     |> validate_actors_match(meta)
     |> validate_context_match(meta)
     |> validate_object_nonexistence()

lib/pleroma/web/activity_pub/object_validators/note_validator.ex

@@ -1,73 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.ActivityPub.ObjectValidators.NoteValidator do
-  use Ecto.Schema
-
-  alias Pleroma.EctoType.ActivityPub.ObjectValidators
-  alias Pleroma.Web.ActivityPub.Transmogrifier
-
-  import Ecto.Changeset
-
-  @primary_key false
-
-  embedded_schema do
-    field(:id, ObjectValidators.ObjectID, primary_key: true)
-    field(:to, ObjectValidators.Recipients, default: [])
-    field(:cc, ObjectValidators.Recipients, default: [])
-    field(:bto, ObjectValidators.Recipients, default: [])
-    field(:bcc, ObjectValidators.Recipients, default: [])
-    # TODO: Write type
-    field(:tag, {:array, :map}, default: [])
-    field(:type, :string)
-
-    field(:name, :string)
-    field(:summary, :string)
-    field(:content, :string)
-
-    field(:context, :string)
-    # short identifier for PleromaFE to group statuses by context
-    field(:context_id, :integer)
-
-    field(:actor, ObjectValidators.ObjectID)
-    field(:attributedTo, ObjectValidators.ObjectID)
-    field(:published, ObjectValidators.DateTime)
-    field(:emoji, ObjectValidators.Emoji, default: %{})
-    field(:sensitive, :boolean, default: false)
-    # TODO: Write type
-    field(:attachment, {:array, :map}, default: [])
-    field(:replies_count, :integer, default: 0)
-    field(:like_count, :integer, default: 0)
-    field(:announcement_count, :integer, default: 0)
-    field(:inReplyTo, ObjectValidators.ObjectID)
-    field(:url, ObjectValidators.Uri)
-
-    field(:likes, {:array, :string}, default: [])
-    field(:announcements, {:array, :string}, default: [])
-  end
-
-  def cast_and_validate(data) do
-    data
-    |> cast_data()
-    |> validate_data()
-  end
-
-  defp fix(data) do
-    data
-    |> Transmogrifier.fix_emoji()
-  end
-
-  def cast_data(data) do
-    data = fix(data)
-
-    %__MODULE__{}
-    |> cast(data, __schema__(:fields))
-  end
-
-  def validate_data(data_cng) do
-    data_cng
-    |> validate_inclusion(:type, ["Note"])
-    |> validate_required([:id, :actor, :to, :cc, :type, :content, :context])
-  end
-end

lib/pleroma/web/activity_pub/object_validators/question_validator.ex

@@ -47,8 +47,8 @@ defmodule Pleroma.Web.ActivityPub.ObjectValidators.QuestionValidator do
     # short identifier for PleromaFE to group statuses by context
     field(:context_id, :integer)
 
-    field(:likes, {:array, :string}, default: [])
+    field(:likes, {:array, ObjectValidators.ObjectID}, default: [])
-    field(:announcements, {:array, :string}, default: [])
+    field(:announcements, {:array, ObjectValidators.ObjectID}, default: [])
 
     field(:closed, ObjectValidators.DateTime)
     field(:voters, {:array, ObjectValidators.ObjectID}, default: [])

lib/pleroma/web/activity_pub/object_validators/url_object_validator.ex

@@ -1,24 +0,0 @@
-# Pleroma: A lightweight social networking server
-# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
-# SPDX-License-Identifier: AGPL-3.0-only
-
-defmodule Pleroma.Web.ActivityPub.ObjectValidators.UrlObjectValidator do
-  use Ecto.Schema
-
-  alias Pleroma.EctoType.ActivityPub.ObjectValidators
-
-  import Ecto.Changeset
-  @primary_key false
-
-  embedded_schema do
-    field(:type, :string)
-    field(:href, ObjectValidators.Uri)
-    field(:mediaType, :string, default: "application/octet-stream")
-  end
-
-  def changeset(struct, data) do
-    struct
-    |> cast(data, __schema__(:fields))
-    |> validate_required([:type, :href, :mediaType])
-  end
-end

lib/pleroma/web/activity_pub/pipeline.ex

@@ -26,13 +26,17 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
 
       {:error, e} ->
         {:error, e}
+
+      {:reject, e} ->
+        {:reject, e}
     end
   end
 
   def do_common_pipeline(object, meta) do
     with {_, {:ok, validated_object, meta}} <-
            {:validate_object, ObjectValidator.validate(object, meta)},
-         {_, {:ok, mrfd_object}} <- {:mrf_object, MRF.filter(validated_object)},
+         {_, {:ok, mrfd_object, meta}} <-
+           {:mrf_object, MRF.pipeline_filter(validated_object, meta)},
          {_, {:ok, activity, meta}} <-
            {:persist_object, ActivityPub.persist(mrfd_object, meta)},
          {_, {:ok, activity, meta}} <-
@@ -40,7 +44,7 @@ defmodule Pleroma.Web.ActivityPub.Pipeline do
          {_, {:ok, _}} <- {:federation, maybe_federate(activity, meta)} do
       {:ok, activity, meta}
     else
-      {:mrf_object, {:reject, _}} -> {:ok, nil, meta}
+      {:mrf_object, {:reject, message, _}} -> {:reject, message}
       e -> {:error, e}
     end
   end

lib/pleroma/web/activity_pub/publisher.ex

@@ -13,6 +13,7 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
   alias Pleroma.User
   alias Pleroma.Web.ActivityPub.Relay
   alias Pleroma.Web.ActivityPub.Transmogrifier
+  alias Pleroma.Web.FedSockets
 
   require Pleroma.Constants
 
@@ -50,15 +51,35 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
   def publish_one(%{inbox: inbox, json: json, actor: %User{} = actor, id: id} = params) do
     Logger.debug("Federating #{id} to #{inbox}")
 
-    uri = URI.parse(inbox)
+    case FedSockets.get_or_create_fed_socket(inbox) do
+      {:ok, fedsocket} ->
+        Logger.debug("publishing via fedsockets - #{inspect(inbox)}")
+        FedSockets.publish(fedsocket, json)
 
+      _ ->
+        Logger.debug("publishing via http - #{inspect(inbox)}")
+        http_publish(inbox, actor, json, params)
+    end
+  end
+
+  def publish_one(%{actor_id: actor_id} = params) do
+    actor = User.get_cached_by_id(actor_id)
+
+    params
+    |> Map.delete(:actor_id)
+    |> Map.put(:actor, actor)
+    |> publish_one()
+  end
+
+  defp http_publish(inbox, actor, json, params) do
+    uri = %{path: path} = URI.parse(inbox)
     digest = "SHA-256=" <> (:crypto.hash(:sha256, json) |> Base.encode64())
 
     date = Pleroma.Signature.signed_date()
 
     signature =
       Pleroma.Signature.sign(actor, %{
-        "(request-target)": "post #{uri.path}",
+        "(request-target)": "post #{path}",
         host: signature_host(uri),
         "content-length": byte_size(json),
         digest: digest,
@@ -89,15 +110,6 @@ defmodule Pleroma.Web.ActivityPub.Publisher do
     end
   end
 
-  def publish_one(%{actor_id: actor_id} = params) do
-    actor = User.get_cached_by_id(actor_id)
-
-    params
-    |> Map.delete(:actor_id)
-    |> Map.put(:actor, actor)
-    |> publish_one()
-  end
-
   defp signature_host(%URI{port: port, scheme: scheme, host: host}) do
     if port == URI.default_port(scheme) do
       host

lib/pleroma/web/activity_pub/side_effects.ex

@@ -7,7 +7,6 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   """
   alias Pleroma.Activity
   alias Pleroma.Activity.Ir.Topics
-  alias Pleroma.ActivityExpiration
   alias Pleroma.Chat
   alias Pleroma.Chat.MessageReference
   alias Pleroma.FollowingRelationship
@@ -188,10 +187,6 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
         Object.increase_replies_count(in_reply_to)
       end
 
-      if expires_at = activity.data["expires_at"] do
-        ActivityExpiration.create(activity, expires_at)
-      end
-
       BackgroundWorker.enqueue("fetch_data_for_activity", %{"activity_id" => activity.id})
 
       meta =
@@ -341,7 +336,7 @@ defmodule Pleroma.Web.ActivityPub.SideEffects do
   end
 
   def handle_object_creation(%{"type" => objtype} = object, meta)
-      when objtype in ~w[Audio Question Event] do
+      when objtype in ~w[Audio Video Question Event Article] do
     with {:ok, object, meta} <- Pipeline.common_pipeline(object, meta) do
       {:ok, object, meta}
     end

lib/pleroma/web/activity_pub/transmogrifier.ex

@@ -7,7 +7,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   A module to handle coding from internal to wire ActivityPub and back.
   """
   alias Pleroma.Activity
-  alias Pleroma.EarmarkRenderer
   alias Pleroma.EctoType.ActivityPub.ObjectValidators
   alias Pleroma.Maps
   alias Pleroma.Object
@@ -45,7 +44,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     |> fix_addressing
     |> fix_summary
     |> fix_type(options)
-    |> fix_content
   end
 
   def fix_summary(%{"summary" => nil} = object) do
@@ -168,7 +166,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   def fix_in_reply_to(%{"inReplyTo" => in_reply_to} = object, options)
       when not is_nil(in_reply_to) do
     in_reply_to_id = prepare_in_reply_to(in_reply_to)
-    object = Map.put(object, "inReplyToAtomUri", in_reply_to_id)
     depth = (options[:depth] || 0) + 1
 
     if Federator.allowed_thread_distance?(depth) do
@@ -176,9 +173,8 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
            %Activity{} <- Activity.get_create_by_object_ap_id(replied_object.data["id"]) do
         object
         |> Map.put("inReplyTo", replied_object.data["id"])
-        |> Map.put("inReplyToAtomUri", object["inReplyToAtomUri"] || in_reply_to_id)
         |> Map.put("context", replied_object.data["context"] || object["conversation"])
-        |> Map.drop(["conversation"])
+        |> Map.drop(["conversation", "inReplyToAtomUri"])
       else
         e ->
           Logger.warn("Couldn't fetch #{inspect(in_reply_to_id)}, error: #{inspect(e)}")
@@ -276,24 +272,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
     Map.put(object, "url", url["href"])
   end
 
-  def fix_url(%{"type" => "Video", "url" => url} = object) when is_list(url) do
+  def fix_url(%{"url" => url} = object) when is_list(url) do
-    attachment =
-      Enum.find(url, fn x ->
-        media_type = x["mediaType"] || x["mimeType"] || ""
-
-        is_map(x) and String.starts_with?(media_type, "video/")
-      end)
-
-    link_element =
-      Enum.find(url, fn x -> is_map(x) and (x["mediaType"] || x["mimeType"]) == "text/html" end)
-
-    object
-    |> Map.put("attachment", [attachment])
-    |> Map.put("url", link_element["href"])
-  end
-
-  def fix_url(%{"type" => object_type, "url" => url} = object)
-      when object_type != "Video" and is_list(url) do
     first_element = Enum.at(url, 0)
 
     url_string =
@@ -311,7 +290,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
   def fix_emoji(%{"tag" => tags} = object) when is_list(tags) do
     emoji =
       tags
-      |> Enum.filter(fn data -> data["type"] == "Emoji" and data["icon"] end)
+      |> Enum.filter(fn data -> is_map(data) and data["type"] == "Emoji" and data["icon"] end)
       |> Enum.reduce(%{}, fn data, mapping ->
         name = String.trim(data["name"], ":")
 
@@ -373,18 +352,6 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def fix_type(object, _), do: object
 
-  defp fix_content(%{"mediaType" => "text/markdown", "content" => content} = object)
-       when is_binary(content) do
-    html_content =
-      content
-      |> Earmark.as_html!(%Earmark.Options{renderer: EarmarkRenderer})
-      |> Pleroma.HTML.filter_tags()
-
-    Map.merge(object, %{"content" => html_content, "mediaType" => "text/html"})
-  end
-
-  defp fix_content(object), do: object
-
   # Reduce the object list to find the reported user.
   defp get_reported(objects) do
     Enum.reduce_while(objects, nil, fn ap_id, _ ->
@@ -457,7 +424,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         %{"type" => "Create", "object" => %{"type" => objtype} = object} = data,
         options
       )
-      when objtype in ~w{Article Note Video Page} do
+      when objtype in ~w{Note Page} do
     actor = Containment.get_actor(data)
 
     with nil <- Activity.get_create_by_object_ap_id(object["id"]),
@@ -551,7 +518,9 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
         %{"type" => "Create", "object" => %{"type" => objtype}} = data,
         _options
       )
-      when objtype in ~w{Question Answer ChatMessage Audio Event} do
+      when objtype in ~w{Question Answer ChatMessage Audio Video Event Article} do
+    data = Map.put(data, "object", strip_internal_fields(data["object"]))
+
     with {:ok, %User{}} <- ObjectValidator.fetch_actor(data),
          {:ok, activity, _} <- Pipeline.common_pipeline(data, local: false) do
       {:ok, activity}
@@ -1031,7 +1000,7 @@ defmodule Pleroma.Web.ActivityPub.Transmogrifier do
 
   def upgrade_user_from_ap_id(ap_id) do
     with %User{local: false} = user <- User.get_cached_by_ap_id(ap_id),
-         {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id),
+         {:ok, data} <- ActivityPub.fetch_and_prepare_user_from_ap_id(ap_id, force_http: true),
          {:ok, user} <- update_user(user, data) do
       TransmogrifierWorker.enqueue("user_upgrade", %{"user_id" => user.id})
       {:ok, user}

lib/pleroma/web/admin_api/controllers/admin_api_controller.ex

@@ -23,8 +23,6 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
   alias Pleroma.Web.Endpoint
   alias Pleroma.Web.Router
 
-  require Logger
-
   @users_page_size 50
 
   plug(
@@ -68,6 +66,12 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     when action in [:list_user_statuses, :list_instance_statuses]
   )
 
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["read:chats"], admin: true}
+    when action in [:list_user_chats]
+  )
+
   plug(
     OAuthScopesPlug,
     %{scopes: ["read"], admin: true}
@@ -256,6 +260,20 @@ defmodule Pleroma.Web.AdminAPI.AdminAPIController do
     end
   end
 
+  def list_user_chats(%{assigns: %{user: admin}} = conn, %{"nickname" => nickname} = _params) do
+    with %User{id: user_id} <- User.get_cached_by_nickname_or_id(nickname, for: admin) do
+      chats =
+        Pleroma.Chat.for_user_query(user_id)
+        |> Pleroma.Repo.all()
+
+      conn
+      |> put_view(AdminAPI.ChatView)
+      |> render("index.json", chats: chats)
+    else
+      _ -> {:error, :not_found}
+    end
+  end
+
   def user_toggle_activation(%{assigns: %{user: admin}} = conn, %{"nickname" => nickname}) do
     user = User.get_cached_by_nickname(nickname)
 

lib/pleroma/web/admin_api/controllers/chat_controller.ex

@@ -0,0 +1,85 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.ChatController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Activity
+  alias Pleroma.Chat
+  alias Pleroma.Chat.MessageReference
+  alias Pleroma.ModerationLog
+  alias Pleroma.Pagination
+  alias Pleroma.Plugs.OAuthScopesPlug
+  alias Pleroma.Web.AdminAPI
+  alias Pleroma.Web.CommonAPI
+  alias Pleroma.Web.PleromaAPI.Chat.MessageReferenceView
+
+  require Logger
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["read:chats"], admin: true} when action in [:show, :messages]
+  )
+
+  plug(
+    OAuthScopesPlug,
+    %{scopes: ["write:chats"], admin: true} when action in [:delete_message]
+  )
+
+  action_fallback(Pleroma.Web.AdminAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.ChatOperation
+
+  def delete_message(%{assigns: %{user: user}} = conn, %{
+        message_id: message_id,
+        id: chat_id
+      }) do
+    with %MessageReference{object: %{data: %{"id" => object_ap_id}}} = cm_ref <-
+           MessageReference.get_by_id(message_id),
+         ^chat_id <- to_string(cm_ref.chat_id),
+         %Activity{id: activity_id} <- Activity.get_create_by_object_ap_id(object_ap_id),
+         {:ok, _} <- CommonAPI.delete(activity_id, user) do
+      ModerationLog.insert_log(%{
+        action: "chat_message_delete",
+        actor: user,
+        subject_id: message_id
+      })
+
+      conn
+      |> put_view(MessageReferenceView)
+      |> render("show.json", chat_message_reference: cm_ref)
+    else
+      _e ->
+        {:error, :could_not_delete}
+    end
+  end
+
+  def messages(conn, %{id: id} = params) do
+    with %Chat{} = chat <- Chat.get_by_id(id) do
+      cm_refs =
+        chat
+        |> MessageReference.for_chat_query()
+        |> Pagination.fetch_paginated(params)
+
+      conn
+      |> put_view(MessageReferenceView)
+      |> render("index.json", chat_message_references: cm_refs)
+    else
+      _ ->
+        conn
+        |> put_status(:not_found)
+        |> json(%{error: "not found"})
+    end
+  end
+
+  def show(conn, %{id: id}) do
+    with %Chat{} = chat <- Chat.get_by_id(id) do
+      conn
+      |> put_view(AdminAPI.ChatView)
+      |> render("show.json", chat: chat)
+    end
+  end
+end

lib/pleroma/web/admin_api/controllers/instance_document_controller.ex

@@ -0,0 +1,41 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.InstanceDocumentController do
+  use Pleroma.Web, :controller
+
+  alias Pleroma.Plugs.InstanceStatic
+  alias Pleroma.Plugs.OAuthScopesPlug
+  alias Pleroma.Web.InstanceDocument
+
+  plug(Pleroma.Web.ApiSpec.CastAndValidate)
+
+  action_fallback(Pleroma.Web.AdminAPI.FallbackController)
+
+  defdelegate open_api_operation(action), to: Pleroma.Web.ApiSpec.Admin.InstanceDocumentOperation
+
+  plug(OAuthScopesPlug, %{scopes: ["read"], admin: true} when action == :show)
+  plug(OAuthScopesPlug, %{scopes: ["write"], admin: true} when action in [:update, :delete])
+
+  def show(conn, %{name: document_name}) do
+    with {:ok, url} <- InstanceDocument.get(document_name),
+         {:ok, content} <- File.read(InstanceStatic.file_path(url)) do
+      conn
+      |> put_resp_content_type("text/html")
+      |> send_resp(200, content)
+    end
+  end
+
+  def update(%{body_params: %{file: file}} = conn, %{name: document_name}) do
+    with {:ok, url} <- InstanceDocument.put(document_name, file.path) do
+      json(conn, %{"url" => url})
+    end
+  end
+
+  def delete(conn, %{name: document_name}) do
+    with :ok <- InstanceDocument.delete(document_name) do
+      json(conn, %{})
+    end
+  end
+end

lib/pleroma/web/admin_api/views/chat_view.ex

@@ -0,0 +1,30 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.AdminAPI.ChatView do
+  use Pleroma.Web, :view
+
+  alias Pleroma.Chat
+  alias Pleroma.User
+  alias Pleroma.Web.MastodonAPI
+  alias Pleroma.Web.PleromaAPI
+
+  def render("index.json", %{chats: chats} = opts) do
+    render_many(chats, __MODULE__, "show.json", Map.delete(opts, :chats))
+  end
+
+  def render("show.json", %{chat: %Chat{user_id: user_id}} = opts) do
+    user = User.get_by_id(user_id)
+    sender = MastodonAPI.AccountView.render("show.json", user: user, skip_visibility_check: true)
+
+    serialized_chat = PleromaAPI.ChatView.render("show.json", opts)
+
+    serialized_chat
+    |> Map.put(:sender, sender)
+    |> Map.put(:receiver, serialized_chat[:account])
+    |> Map.delete(:account)
+  end
+
+  def render(view, opts), do: PleromaAPI.ChatView.render(view, opts)
+end

lib/pleroma/web/admin_api/views/status_view.ex

@@ -8,6 +8,7 @@ defmodule Pleroma.Web.AdminAPI.StatusView do
   require Pleroma.Constants
 
   alias Pleroma.Web.AdminAPI
+  alias Pleroma.Web.CommonAPI
   alias Pleroma.Web.MastodonAPI
 
   defdelegate merge_account_views(user), to: AdminAPI.AccountView
@@ -17,7 +18,7 @@ defmodule Pleroma.Web.AdminAPI.StatusView do
   end
 
   def render("show.json", %{activity: %{data: %{"object" => _object}} = activity} = opts) do
-    user = MastodonAPI.StatusView.get_user(activity.data["actor"])
+    user = CommonAPI.get_user(activity.data["actor"])
 
     MastodonAPI.StatusView.render("show.json", opts)
     |> Map.merge(%{account: merge_account_views(user)})

lib/pleroma/web/api_spec.ex

@@ -13,10 +13,15 @@ defmodule Pleroma.Web.ApiSpec do
   @impl OpenApi
   def spec do
     %OpenApi{
-      servers: [
+      servers:
+        if Phoenix.Endpoint.server?(:pleroma, Endpoint) do
+          [
             # Populate the Server info from a phoenix endpoint
             OpenApiSpex.Server.from_endpoint(Endpoint)
-      ],
+          ]
+        else
+          []
+        end,
       info: %OpenApiSpex.Info{
         title: "Pleroma",
         description: Application.spec(:pleroma, :description) |> to_string(),

lib/pleroma/web/api_spec/helpers.ex

@@ -72,7 +72,11 @@ defmodule Pleroma.Web.ApiSpec.Helpers do
   end
 
   def empty_array_response do
-    Operation.response("Empty array", "application/json", %Schema{type: :array, example: []})
+    Operation.response("Empty array", "application/json", %Schema{
+      type: :array,
+      items: %Schema{type: :object, example: %{}},
+      example: []
+    })
   end
 
   def no_content_response do

lib/pleroma/web/api_spec/operations/account_operation.ex

@@ -372,6 +372,10 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
       tags: ["accounts"],
       summary: "Identity proofs",
       operationId: "AccountController.identity_proofs",
+      # Validators complains about unused path params otherwise
+      parameters: [
+        %Reference{"$ref": "#/components/parameters/accountIdOrNickname"}
+      ],
       description: "Not implemented",
       responses: %{
         200 => empty_array_response()
@@ -469,7 +473,6 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
         identifier: %Schema{type: :string},
         message: %Schema{type: :string}
       },
-      required: [],
       # Note: example of successful registration with failed login response:
       # example: %{
       #   "identifier" => "missing_confirmed_email",
@@ -530,7 +533,7 @@ defmodule Pleroma.Web.ApiSpec.AccountOperation do
           nullable: true,
           oneOf: [
             %Schema{type: :array, items: attribute_field()},
-            %Schema{type: :object, additionalProperties: %Schema{type: attribute_field()}}
+            %Schema{type: :object, additionalProperties: attribute_field()}
           ]
         },
         # NOTE: `source` field is not supported

lib/pleroma/web/api_spec/operations/admin/chat_operation.ex

@@ -0,0 +1,96 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Admin.ChatOperation do
+  alias OpenApiSpex.Operation
+  alias Pleroma.Web.ApiSpec.Schemas.Chat
+  alias Pleroma.Web.ApiSpec.Schemas.ChatMessage
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def delete_message_operation do
+    %Operation{
+      tags: ["admin", "chat"],
+      summary: "Delete an individual chat message",
+      operationId: "AdminAPI.ChatController.delete_message",
+      parameters: [
+        Operation.parameter(:id, :path, :string, "The ID of the Chat"),
+        Operation.parameter(:message_id, :path, :string, "The ID of the message")
+      ],
+      responses: %{
+        200 =>
+          Operation.response(
+            "The deleted ChatMessage",
+            "application/json",
+            ChatMessage
+          )
+      },
+      security: [
+        %{
+          "oAuth" => ["write:chats"]
+        }
+      ]
+    }
+  end
+
+  def messages_operation do
+    %Operation{
+      tags: ["admin", "chat"],
+      summary: "Get the most recent messages of the chat",
+      operationId: "AdminAPI.ChatController.messages",
+      parameters:
+        [Operation.parameter(:id, :path, :string, "The ID of the Chat")] ++
+          pagination_params(),
+      responses: %{
+        200 =>
+          Operation.response(
+            "The messages in the chat",
+            "application/json",
+            Pleroma.Web.ApiSpec.ChatOperation.chat_messages_response()
+          )
+      },
+      security: [
+        %{
+          "oAuth" => ["read:chats"]
+        }
+      ]
+    }
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["chat"],
+      summary: "Create a chat",
+      operationId: "AdminAPI.ChatController.show",
+      parameters: [
+        Operation.parameter(
+          :id,
+          :path,
+          :string,
+          "The id of the chat",
+          required: true,
+          example: "1234"
+        )
+      ],
+      responses: %{
+        200 =>
+          Operation.response(
+            "The existing chat",
+            "application/json",
+            Chat
+          )
+      },
+      security: [
+        %{
+          "oAuth" => ["read"]
+        }
+      ]
+    }
+  end
+end

lib/pleroma/web/api_spec/operations/admin/instance_document_operation.ex

@@ -0,0 +1,115 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.Admin.InstanceDocumentOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Helpers
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def show_operation do
+    %Operation{
+      tags: ["Admin", "InstanceDocument"],
+      summary: "Get the instance document",
+      operationId: "AdminAPI.InstanceDocumentController.show",
+      security: [%{"oAuth" => ["read"]}],
+      parameters: [
+        Operation.parameter(:name, :path, %Schema{type: :string}, "The document name",
+          required: true
+        )
+        | Helpers.admin_api_params()
+      ],
+      responses: %{
+        200 => document_content(),
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  def update_operation do
+    %Operation{
+      tags: ["Admin", "InstanceDocument"],
+      summary: "Update the instance document",
+      operationId: "AdminAPI.InstanceDocumentController.update",
+      security: [%{"oAuth" => ["write"]}],
+      requestBody: Helpers.request_body("Parameters", update_request()),
+      parameters: [
+        Operation.parameter(:name, :path, %Schema{type: :string}, "The document name",
+          required: true
+        )
+        | Helpers.admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("InstanceDocument", "application/json", instance_document()),
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp update_request do
+    %Schema{
+      title: "UpdateRequest",
+      description: "POST body for uploading the file",
+      type: :object,
+      required: [:file],
+      properties: %{
+        file: %Schema{
+          type: :string,
+          format: :binary,
+          description: "The file to be uploaded, using multipart form data."
+        }
+      }
+    }
+  end
+
+  def delete_operation do
+    %Operation{
+      tags: ["Admin", "InstanceDocument"],
+      summary: "Get the instance document",
+      operationId: "AdminAPI.InstanceDocumentController.delete",
+      security: [%{"oAuth" => ["write"]}],
+      parameters: [
+        Operation.parameter(:name, :path, %Schema{type: :string}, "The document name",
+          required: true
+        )
+        | Helpers.admin_api_params()
+      ],
+      responses: %{
+        200 => Operation.response("InstanceDocument", "application/json", instance_document()),
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        403 => Operation.response("Forbidden", "application/json", ApiError),
+        404 => Operation.response("Not Found", "application/json", ApiError)
+      }
+    }
+  end
+
+  defp instance_document do
+    %Schema{
+      title: "InstanceDocument",
+      type: :object,
+      properties: %{
+        url: %Schema{type: :string}
+      },
+      example: %{
+        "url" => "https://example.com/static/terms-of-service.html"
+      }
+    }
+  end
+
+  defp document_content do
+    Operation.response("InstanceDocumentContent", "text/html", %Schema{
+      type: :string,
+      example: "<h1>Instance panel</h1>"
+    })
+  end
+end

lib/pleroma/web/api_spec/operations/chat_operation.ex

@@ -185,7 +185,8 @@ defmodule Pleroma.Web.ApiSpec.ChatOperation do
             "application/json",
             ChatMessage
           ),
-        400 => Operation.response("Bad Request", "application/json", ApiError)
+        400 => Operation.response("Bad Request", "application/json", ApiError),
+        422 => Operation.response("MRF Rejection", "application/json", ApiError)
       },
       security: [
         %{

lib/pleroma/web/api_spec/operations/custom_emoji_operation.ex

@@ -69,7 +69,7 @@ defmodule Pleroma.Web.ApiSpec.CustomEmojiOperation do
           type: :object,
           properties: %{
             category: %Schema{type: :string},
-            tags: %Schema{type: :array}
+            tags: %Schema{type: :array, items: %Schema{type: :string}}
           }
         }
       ],

lib/pleroma/web/api_spec/operations/emoji_reaction_operation.ex

@@ -23,7 +23,7 @@ defmodule Pleroma.Web.ApiSpec.EmojiReactionOperation do
       parameters: [
         Operation.parameter(:id, :path, FlakeID, "Status ID", required: true),
         Operation.parameter(:emoji, :path, :string, "Filter by a single unicode emoji",
-          required: false
+          required: nil
         )
       ],
       security: [%{"oAuth" => ["read:statuses"]}],

lib/pleroma/web/api_spec/operations/list_operation.ex

@@ -187,8 +187,7 @@ defmodule Pleroma.Web.ApiSpec.ListOperation do
         type: :object,
         properties: %{
           account_ids: %Schema{type: :array, description: "Array of account IDs", items: FlakeID}
-        },
+        }
-        required: required && [:account_ids]
       },
       required: required
     )

lib/pleroma/web/api_spec/operations/status_operation.ex

@@ -55,7 +55,7 @@ defmodule Pleroma.Web.ApiSpec.StatusOperation do
             "application/json",
             %Schema{oneOf: [Status, ScheduledStatus]}
           ),
-        422 => Operation.response("Bad Request", "application/json", ApiError)
+        422 => Operation.response("Bad Request / MRF Rejection", "application/json", ApiError)
       }
     }
   end

lib/pleroma/web/api_spec/operations/user_import_operation.ex

@@ -0,0 +1,80 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.ApiSpec.UserImportOperation do
+  alias OpenApiSpex.Operation
+  alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.ApiError
+
+  import Pleroma.Web.ApiSpec.Helpers
+
+  @spec open_api_operation(atom) :: Operation.t()
+  def open_api_operation(action) do
+    operation = String.to_existing_atom("#{action}_operation")
+    apply(__MODULE__, operation, [])
+  end
+
+  def follow_operation do
+    %Operation{
+      tags: ["follow_import"],
+      summary: "Imports your follows.",
+      operationId: "UserImportController.follow",
+      requestBody: request_body("Parameters", import_request(), required: true),
+      responses: %{
+        200 => ok_response(),
+        500 => Operation.response("Error", "application/json", ApiError)
+      },
+      security: [%{"oAuth" => ["write:follow"]}]
+    }
+  end
+
+  def blocks_operation do
+    %Operation{
+      tags: ["blocks_import"],
+      summary: "Imports your blocks.",
+      operationId: "UserImportController.blocks",
+      requestBody: request_body("Parameters", import_request(), required: true),
+      responses: %{
+        200 => ok_response(),
+        500 => Operation.response("Error", "application/json", ApiError)
+      },
+      security: [%{"oAuth" => ["write:blocks"]}]
+    }
+  end
+
+  def mutes_operation do
+    %Operation{
+      tags: ["mutes_import"],
+      summary: "Imports your mutes.",
+      operationId: "UserImportController.mutes",
+      requestBody: request_body("Parameters", import_request(), required: true),
+      responses: %{
+        200 => ok_response(),
+        500 => Operation.response("Error", "application/json", ApiError)
+      },
+      security: [%{"oAuth" => ["write:mutes"]}]
+    }
+  end
+
+  defp import_request do
+    %Schema{
+      type: :object,
+      required: [:list],
+      properties: %{
+        list: %Schema{
+          description:
+            "STRING or FILE containing a whitespace-separated list of accounts to import.",
+          anyOf: [
+            %Schema{type: :string, format: :binary},
+            %Schema{type: :string}
+          ]
+        }
+      }
+    }
+  end
+
+  defp ok_response do
+    Operation.response("Ok", "application/json", %Schema{type: :string, example: "ok"})
+  end
+end

lib/pleroma/web/api_spec/schemas/chat_message.ex

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Web.ApiSpec.Schemas.ChatMessage do
   alias OpenApiSpex.Schema
+  alias Pleroma.Web.ApiSpec.Schemas.Emoji
 
   require OpenApiSpex
 
@@ -18,7 +19,7 @@ defmodule Pleroma.Web.ApiSpec.Schemas.ChatMessage do
       chat_id: %Schema{type: :string},
       content: %Schema{type: :string, nullable: true},
       created_at: %Schema{type: :string, format: :"date-time"},
-      emojis: %Schema{type: :array},
+      emojis: %Schema{type: :array, items: Emoji},
       attachment: %Schema{type: :object, nullable: true},
       card: %Schema{
         type: :object,

lib/pleroma/web/api_spec/schemas/scheduled_status.ex

@@ -27,9 +27,9 @@ defmodule Pleroma.Web.ApiSpec.Schemas.ScheduledStatus do
           media_ids: %Schema{type: :array, nullable: true, items: %Schema{type: :string}},
           sensitive: %Schema{type: :boolean, nullable: true},
           spoiler_text: %Schema{type: :string, nullable: true},
-          visibility: %Schema{type: VisibilityScope, nullable: true},
+          visibility: %Schema{allOf: [VisibilityScope], nullable: true},
           scheduled_at: %Schema{type: :string, format: :"date-time", nullable: true},
-          poll: %Schema{type: Poll, nullable: true},
+          poll: %Schema{allOf: [Poll], nullable: true},
           in_reply_to_id: %Schema{type: :string, nullable: true}
         }
       }

lib/pleroma/web/common_api/activity_draft.ex

@@ -202,7 +202,7 @@ defmodule Pleroma.Web.CommonAPI.ActivityDraft do
 
     additional =
       case draft.expires_at do
-        %NaiveDateTime{} = expires_at -> Map.put(additional, "expires_at", expires_at)
+        %DateTime{} = expires_at -> Map.put(additional, "expires_at", expires_at)
         _ -> additional
       end
 

lib/pleroma/web/common_api/common_api.ex

@@ -4,7 +4,6 @@
 
 defmodule Pleroma.Web.CommonAPI do
   alias Pleroma.Activity
-  alias Pleroma.ActivityExpiration
   alias Pleroma.Conversation.Participation
   alias Pleroma.Formatter
   alias Pleroma.Object
@@ -49,6 +48,9 @@ defmodule Pleroma.Web.CommonAPI do
               local: true
             )} do
       {:ok, activity}
+    else
+      {:common_pipeline, {:reject, _} = e} -> e
+      e -> e
     end
   end
 
@@ -381,9 +383,9 @@ defmodule Pleroma.Web.CommonAPI do
   def check_expiry_date({:ok, nil} = res), do: res
 
   def check_expiry_date({:ok, in_seconds}) do
-    expiry = NaiveDateTime.utc_now() |> NaiveDateTime.add(in_seconds)
+    expiry = DateTime.add(DateTime.utc_now(), in_seconds)
 
-    if ActivityExpiration.expires_late_enough?(expiry) do
+    if Pleroma.Workers.PurgeExpiredActivity.expires_late_enough?(expiry) do
       {:ok, expiry}
     else
       {:error, "Expiry date is too soon"}
@@ -551,4 +553,21 @@ defmodule Pleroma.Web.CommonAPI do
   def show_reblogs(%User{} = user, %User{} = target) do
     UserRelationship.delete_reblog_mute(user, target)
   end
+
+  def get_user(ap_id, fake_record_fallback \\ true) do
+    cond do
+      user = User.get_cached_by_ap_id(ap_id) ->
+        user
+
+      user = User.get_by_guessed_nickname(ap_id) ->
+        user
+
+      fake_record_fallback ->
+        # TODO: refactor (fake records is never a good idea)
+        User.error_user(ap_id)
+
+      true ->
+        nil
+    end
+  end
 end

lib/pleroma/web/fed_sockets/fed_registry.ex

@@ -0,0 +1,185 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.FedRegistry do
+  @moduledoc """
+  The FedRegistry stores the active FedSockets for quick retrieval.
+
+  The storage and retrieval portion of the FedRegistry is done in process through
+  elixir's `Registry` module for speed and its ability to monitor for terminated processes.
+
+  Dropped connections will be caught by `Registry` and deleted. Since the next
+  message will initiate a new connection there is no reason to try and reconnect at that point.
+
+  Normally outside modules should have no need to call or use the FedRegistry themselves.
+  """
+
+  alias Pleroma.Web.FedSockets.FedSocket
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  require Logger
+
+  @default_rejection_duration 15 * 60 * 1000
+  @rejections :fed_socket_rejections
+
+  @doc """
+  Retrieves a FedSocket from the Registry given it's origin.
+
+  The origin is expected to be a string identifying the endpoint "example.com" or "example2.com:8080"
+
+  Will return:
+    * {:ok, fed_socket} for working FedSockets
+    * {:error, :rejected} for origins that have been tried and refused within the rejection duration interval
+    * {:error, some_reason} usually :missing for unknown origins
+  """
+  def get_fed_socket(origin) do
+    case get_registry_data(origin) do
+      {:error, reason} ->
+        {:error, reason}
+
+      {:ok, %{state: :connected} = socket_info} ->
+        {:ok, socket_info}
+    end
+  end
+
+  @doc """
+  Adds a connected FedSocket to the Registry.
+
+  Always returns {:ok, fed_socket}
+  """
+  def add_fed_socket(origin, pid \\ nil) do
+    origin
+    |> SocketInfo.build(pid)
+    |> SocketInfo.connect()
+    |> add_socket_info
+  end
+
+  defp add_socket_info(%{origin: origin, state: :connected} = socket_info) do
+    case Registry.register(FedSockets.Registry, origin, socket_info) do
+      {:ok, _owner} ->
+        clear_prior_rejection(origin)
+        Logger.debug("fedsocket added: #{inspect(origin)}")
+
+        {:ok, socket_info}
+
+      {:error, {:already_registered, _pid}} ->
+        FedSocket.close(socket_info)
+        existing_socket_info = Registry.lookup(FedSockets.Registry, origin)
+
+        {:ok, existing_socket_info}
+
+      _ ->
+        {:error, :error_adding_socket}
+    end
+  end
+
+  @doc """
+  Mark this origin as having rejected a connection attempt.
+  This will keep it from getting additional connection attempts
+  for a period of time specified in the config.
+
+  Always returns {:ok, new_reg_data}
+  """
+  def set_host_rejected(uri) do
+    new_reg_data =
+      uri
+      |> SocketInfo.origin()
+      |> get_or_create_registry_data()
+      |> set_to_rejected()
+      |> save_registry_data()
+
+    {:ok, new_reg_data}
+  end
+
+  @doc """
+  Retrieves the FedRegistryData from the Registry given it's origin.
+
+  The origin is expected to be a string identifying the endpoint "example.com" or "example2.com:8080"
+
+  Will return:
+    * {:ok, fed_registry_data} for known origins
+    * {:error, :missing} for uniknown origins
+    * {:error, :cache_error} indicating some low level runtime issues
+  """
+  def get_registry_data(origin) do
+    case Registry.lookup(FedSockets.Registry, origin) do
+      [] ->
+        if is_rejected?(origin) do
+          Logger.debug("previously rejected fedsocket requested")
+          {:error, :rejected}
+        else
+          {:error, :missing}
+        end
+
+      [{_pid, %{state: :connected} = socket_info}] ->
+        {:ok, socket_info}
+
+      _ ->
+        {:error, :cache_error}
+    end
+  end
+
+  @doc """
+  Retrieves a map of all sockets from the Registry. The keys are the origins and the values are the corresponding SocketInfo
+  """
+  def list_all do
+    (list_all_connected() ++ list_all_rejected())
+    |> Enum.into(%{})
+  end
+
+  defp list_all_connected do
+    FedSockets.Registry
+    |> Registry.select([{{:"$1", :_, :"$3"}, [], [{{:"$1", :"$3"}}]}])
+  end
+
+  defp list_all_rejected do
+    {:ok, keys} = Cachex.keys(@rejections)
+
+    {:ok, registry_data} =
+      Cachex.execute(@rejections, fn worker ->
+        Enum.map(keys, fn k -> {k, Cachex.get!(worker, k)} end)
+      end)
+
+    registry_data
+  end
+
+  defp clear_prior_rejection(origin),
+    do: Cachex.del(@rejections, origin)
+
+  defp is_rejected?(origin) do
+    case Cachex.get(@rejections, origin) do
+      {:ok, nil} ->
+        false
+
+      {:ok, _} ->
+        true
+    end
+  end
+
+  defp get_or_create_registry_data(origin) do
+    case get_registry_data(origin) do
+      {:error, :missing} ->
+        %SocketInfo{origin: origin}
+
+      {:ok, socket_info} ->
+        socket_info
+    end
+  end
+
+  defp save_registry_data(%SocketInfo{origin: origin, state: :connected} = socket_info) do
+    {:ok, true} = Registry.update_value(FedSockets.Registry, origin, fn _ -> socket_info end)
+    socket_info
+  end
+
+  defp save_registry_data(%SocketInfo{origin: origin, state: :rejected} = socket_info) do
+    rejection_expiration =
+      Pleroma.Config.get([:fed_sockets, :rejection_duration], @default_rejection_duration)
+
+    {:ok, true} = Cachex.put(@rejections, origin, socket_info, ttl: rejection_expiration)
+    socket_info
+  end
+
+  defp set_to_rejected(%SocketInfo{} = socket_info),
+    do: %SocketInfo{socket_info | state: :rejected}
+end

lib/pleroma/web/fed_sockets/fed_socket.ex

@@ -0,0 +1,137 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.FedSocket do
+  @moduledoc """
+  The FedSocket module abstracts the actions to be taken taken on connections regardless of
+  whether the connection started as inbound or outbound.
+
+
+  Normally outside modules will have no need to call the FedSocket module directly.
+  """
+
+  alias Pleroma.Object
+  alias Pleroma.Object.Containment
+  alias Pleroma.User
+  alias Pleroma.Web.ActivityPub.ObjectView
+  alias Pleroma.Web.ActivityPub.UserView
+  alias Pleroma.Web.ActivityPub.Visibility
+  alias Pleroma.Web.FedSockets.FetchRegistry
+  alias Pleroma.Web.FedSockets.IngesterWorker
+  alias Pleroma.Web.FedSockets.OutgoingHandler
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  require Logger
+
+  @shake "61dd18f7-f1e6-49a4-939a-a749fcdc1103"
+
+  def connect_to_host(uri) do
+    case OutgoingHandler.start_link(uri) do
+      {:ok, pid} ->
+        {:ok, pid}
+
+      error ->
+        {:error, error}
+    end
+  end
+
+  def close(%SocketInfo{pid: socket_pid}),
+    do: Process.send(socket_pid, :close, [])
+
+  def publish(%SocketInfo{pid: socket_pid}, json) do
+    %{action: :publish, data: json}
+    |> Jason.encode!()
+    |> send_packet(socket_pid)
+  end
+
+  def fetch(%SocketInfo{pid: socket_pid}, id) do
+    fetch_uuid = FetchRegistry.register_fetch(id)
+
+    %{action: :fetch, data: id, uuid: fetch_uuid}
+    |> Jason.encode!()
+    |> send_packet(socket_pid)
+
+    wait_for_fetch_to_return(fetch_uuid, 0)
+  end
+
+  def receive_package(%SocketInfo{} = fed_socket, json) do
+    json
+    |> Jason.decode!()
+    |> process_package(fed_socket)
+  end
+
+  defp wait_for_fetch_to_return(uuid, cntr) do
+    case FetchRegistry.check_fetch(uuid) do
+      {:error, :waiting} ->
+        Process.sleep(:math.pow(cntr, 3) |> Kernel.trunc())
+        wait_for_fetch_to_return(uuid, cntr + 1)
+
+      {:error, :missing} ->
+        Logger.error("FedSocket fetch timed out - #{inspect(uuid)}")
+        {:error, :timeout}
+
+      {:ok, _fr} ->
+        FetchRegistry.pop_fetch(uuid)
+    end
+  end
+
+  defp process_package(%{"action" => "publish", "data" => data}, %{origin: origin} = _fed_socket) do
+    if Containment.contain_origin(origin, data) do
+      IngesterWorker.enqueue("ingest", %{"object" => data})
+    end
+
+    {:reply, %{"action" => "publish_reply", "status" => "processed"}}
+  end
+
+  defp process_package(%{"action" => "fetch_reply", "uuid" => uuid, "data" => data}, _fed_socket) do
+    FetchRegistry.register_fetch_received(uuid, data)
+    {:noreply, nil}
+  end
+
+  defp process_package(%{"action" => "fetch", "uuid" => uuid, "data" => ap_id}, _fed_socket) do
+    {:ok, data} = render_fetched_data(ap_id, uuid)
+    {:reply, data}
+  end
+
+  defp process_package(%{"action" => "publish_reply"}, _fed_socket) do
+    {:noreply, nil}
+  end
+
+  defp process_package(other, _fed_socket) do
+    Logger.warn("unknown json packages received #{inspect(other)}")
+    {:noreply, nil}
+  end
+
+  defp render_fetched_data(ap_id, uuid) do
+    {:ok,
+     %{
+       "action" => "fetch_reply",
+       "status" => "processed",
+       "uuid" => uuid,
+       "data" => represent_item(ap_id)
+     }}
+  end
+
+  defp represent_item(ap_id) do
+    case User.get_by_ap_id(ap_id) do
+      nil ->
+        object = Object.get_cached_by_ap_id(ap_id)
+
+        if Visibility.is_public?(object) do
+          Phoenix.View.render_to_string(ObjectView, "object.json", object: object)
+        else
+          nil
+        end
+
+      user ->
+        Phoenix.View.render_to_string(UserView, "user.json", user: user)
+    end
+  end
+
+  defp send_packet(data, socket_pid) do
+    Process.send(socket_pid, {:send, data}, [])
+  end
+
+  def shake, do: @shake
+end

lib/pleroma/web/fed_sockets/fed_sockets.ex

@@ -0,0 +1,185 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets do
+  @moduledoc """
+  This documents the FedSockets framework. A framework for federating
+  ActivityPub objects between servers via persistant WebSocket connections.
+
+  FedSockets allow servers to authenticate on first contact and maintain that
+  connection, eliminating the need to authenticate every time data needs to be shared.
+
+  ## Protocol
+  FedSockets currently support 2 types of data transfer:
+    * `publish` method which doesn't require a response
+    * `fetch` method requires a response be sent
+
+    ### Publish
+    The publish operation sends a json encoded map of the shape:
+      %{action: :publish, data: json}
+    and accepts (but does not require) a reply of form:
+      %{"action" => "publish_reply"}
+
+    The outgoing params represent
+      * data: ActivityPub object encoded into json
+
+
+    ### Fetch
+    The fetch operation sends a json encoded map of the shape:
+      %{action: :fetch, data: id, uuid: fetch_uuid}
+    and requires a reply of form:
+      %{"action" => "fetch_reply", "uuid" => uuid, "data" => data}
+
+    The outgoing params represent
+      * id: an ActivityPub object URI
+      * uuid: a unique uuid generated by the sender
+
+    The reply params represent
+      * data: an ActivityPub object encoded into json
+      * uuid: the uuid sent along with the fetch request
+
+  ## Examples
+  Clients of FedSocket transfers shouldn't need to use any of the functions outside of this module.
+
+  A typical publish operation can be performed through the following code, and a fetch operation in a similar manner.
+
+    case FedSockets.get_or_create_fed_socket(inbox) do
+      {:ok, fedsocket} ->
+        FedSockets.publish(fedsocket, json)
+
+      _ ->
+        alternative_publish(inbox, actor, json, params)
+    end
+
+  ## Configuration
+  FedSockets have the following config settings
+
+  config :pleroma, :fed_sockets,
+  enabled: true,
+  ping_interval: :timer.seconds(15),
+  connection_duration: :timer.hours(1),
+  rejection_duration: :timer.hours(1),
+  fed_socket_fetches: [
+    default: 12_000,
+    interval: 3_000,
+    lazy: false
+  ]
+    * enabled - turn FedSockets on or off with this flag. Can be toggled at runtime.
+    * connection_duration - How long a FedSocket can sit idle before it's culled.
+    * rejection_duration - After failing to make a FedSocket connection a host will be excluded
+    from further connections for this amount of time
+    * fed_socket_fetches - Use these parameters to pass options to the Cachex queue backing the FetchRegistry
+    * fed_socket_rejections - Use these parameters to pass options to the Cachex queue backing the FedRegistry
+
+    Cachex options are
+      * default: the minimum amount of time a fetch can wait before it times out.
+      * interval: the interval between checks for timed out entries. This plus the default represent the maximum time allowed
+      * lazy: leave at false for consistant and fast lookups, set to true for stricter timeout enforcement
+
+  """
+  require Logger
+
+  alias Pleroma.Web.FedSockets.FedRegistry
+  alias Pleroma.Web.FedSockets.FedSocket
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  @doc """
+  returns a FedSocket for the given origin. Will reuse an existing one or create a new one.
+
+  address is expected to be a fully formed URL such as:
+  "http://www.example.com" or "http://www.example.com:8080"
+
+  It can and usually does include additional path parameters,
+  but these are ignored as the FedSockets are organized by host and port info alone.
+  """
+  def get_or_create_fed_socket(address) do
+    with {:cache, {:error, :missing}} <- {:cache, get_fed_socket(address)},
+         {:connect, {:ok, _pid}} <- {:connect, FedSocket.connect_to_host(address)},
+         {:cache, {:ok, fed_socket}} <- {:cache, get_fed_socket(address)} do
+      Logger.debug("fedsocket created for - #{inspect(address)}")
+      {:ok, fed_socket}
+    else
+      {:cache, {:ok, socket}} ->
+        Logger.debug("fedsocket found in cache - #{inspect(address)}")
+        {:ok, socket}
+
+      {:cache, {:error, :rejected} = e} ->
+        e
+
+      {:connect, {:error, _host}} ->
+        Logger.debug("set host rejected for - #{inspect(address)}")
+        FedRegistry.set_host_rejected(address)
+        {:error, :rejected}
+
+      {_, {:error, :disabled}} ->
+        {:error, :disabled}
+
+      {_, {:error, reason}} ->
+        Logger.warn("get_or_create_fed_socket error - #{inspect(reason)}")
+        {:error, reason}
+    end
+  end
+
+  @doc """
+  returns a FedSocket for the given origin. Will not create a new FedSocket if one does not exist.
+
+  address is expected to be a fully formed URL such as:
+    "http://www.example.com" or "http://www.example.com:8080"
+  """
+  def get_fed_socket(address) do
+    origin = SocketInfo.origin(address)
+
+    with {:config, true} <- {:config, Pleroma.Config.get([:fed_sockets, :enabled], false)},
+         {:ok, socket} <- FedRegistry.get_fed_socket(origin) do
+      {:ok, socket}
+    else
+      {:config, _} ->
+        {:error, :disabled}
+
+      {:error, :rejected} ->
+        Logger.debug("FedSocket previously rejected - #{inspect(origin)}")
+        {:error, :rejected}
+
+      {:error, reason} ->
+        {:error, reason}
+    end
+  end
+
+  @doc """
+  Sends the supplied data via the publish protocol.
+  It will not block waiting for a reply.
+  Returns :ok but this is not an indication of a successful transfer.
+
+  the data is expected to be JSON encoded binary data.
+  """
+  def publish(%SocketInfo{} = fed_socket, json) do
+    FedSocket.publish(fed_socket, json)
+  end
+
+  @doc """
+  Sends the supplied data via the fetch protocol.
+  It will block waiting for a reply or timeout.
+
+  Returns {:ok, object} where object is the requested object (or nil)
+          {:error, :timeout} in the event the message was not responded to
+
+  the id is expected to be the URI of an ActivityPub object.
+  """
+  def fetch(%SocketInfo{} = fed_socket, id) do
+    FedSocket.fetch(fed_socket, id)
+  end
+
+  @doc """
+  Disconnect all and restart FedSockets.
+  This is mainly used in development and testing but could be useful in production.
+  """
+  def reset do
+    FedRegistry
+    |> Process.whereis()
+    |> Process.exit(:testing)
+  end
+
+  def uri_for_origin(origin),
+    do: "ws://#{origin}/api/fedsocket/v1"
+end

lib/pleroma/web/fed_sockets/fetch_registry.ex

@@ -0,0 +1,151 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.FetchRegistry do
+  @moduledoc """
+  The FetchRegistry acts as a broker for fetch requests and return values.
+  This allows calling processes to block while waiting for a reply.
+  It doesn't impose it's own process instead using `Cachex` to handle fetches in process, allowing
+  multi threaded processes to avoid bottlenecking.
+
+  Normally outside modules will have no need to call or use the FetchRegistry themselves.
+
+  The `Cachex` parameters can be controlled from the config. Since exact timeout intervals
+  aren't necessary the following settings are used by default:
+
+  config :pleroma, :fed_sockets,
+    fed_socket_fetches: [
+      default: 12_000,
+      interval: 3_000,
+      lazy: false
+    ]
+
+  """
+
+  defmodule FetchRegistryData do
+    defstruct uuid: nil,
+              sent_json: nil,
+              received_json: nil,
+              sent_at: nil,
+              received_at: nil
+  end
+
+  alias Ecto.UUID
+
+  require Logger
+
+  @fetches :fed_socket_fetches
+
+  @doc """
+  Registers a json request wth the FetchRegistry and returns the identifying UUID.
+  """
+  def register_fetch(json) do
+    %FetchRegistryData{uuid: uuid} =
+      json
+      |> new_registry_data
+      |> save_registry_data
+
+    uuid
+  end
+
+  @doc """
+  Reports on the status of a Fetch given the identifying UUID.
+
+  Will return
+    * {:ok, fetched_object} if a fetch has completed
+    * {:error, :waiting} if a fetch is still pending
+    * {:error, other_error} usually :missing to indicate a fetch that has timed out
+  """
+  def check_fetch(uuid) do
+    case get_registry_data(uuid) do
+      {:ok, %FetchRegistryData{received_at: nil}} ->
+        {:error, :waiting}
+
+      {:ok, %FetchRegistryData{} = reg_data} ->
+        {:ok, reg_data}
+
+      e ->
+        e
+    end
+  end
+
+  @doc """
+  Retrieves the response to a fetch given the identifying UUID.
+  The completed fetch will be deleted from the FetchRegistry
+
+  Will return
+    * {:ok, fetched_object} if a fetch has completed
+    * {:error, :waiting} if a fetch is still pending
+    * {:error, other_error} usually :missing to indicate a fetch that has timed out
+  """
+  def pop_fetch(uuid) do
+    case check_fetch(uuid) do
+      {:ok, %FetchRegistryData{received_json: received_json}} ->
+        delete_registry_data(uuid)
+        {:ok, received_json}
+
+      e ->
+        e
+    end
+  end
+
+  @doc """
+  This is called to register a fetch has returned.
+  It expects the result data along with the UUID that was sent in the request
+
+  Will return the fetched object or :error
+  """
+  def register_fetch_received(uuid, data) do
+    case get_registry_data(uuid) do
+      {:ok, %FetchRegistryData{received_at: nil} = reg_data} ->
+        reg_data
+        |> set_fetch_received(data)
+        |> save_registry_data()
+
+      {:ok, %FetchRegistryData{} = reg_data} ->
+        Logger.warn("tried to add fetched data twice - #{uuid}")
+        reg_data
+
+      {:error, _} ->
+        Logger.warn("Error adding fetch to registry - #{uuid}")
+        :error
+    end
+  end
+
+  defp new_registry_data(json) do
+    %FetchRegistryData{
+      uuid: UUID.generate(),
+      sent_json: json,
+      sent_at: :erlang.monotonic_time(:millisecond)
+    }
+  end
+
+  defp get_registry_data(origin) do
+    case Cachex.get(@fetches, origin) do
+      {:ok, nil} ->
+        {:error, :missing}
+
+      {:ok, reg_data} ->
+        {:ok, reg_data}
+
+      _ ->
+        {:error, :cache_error}
+    end
+  end
+
+  defp set_fetch_received(%FetchRegistryData{} = reg_data, data),
+    do: %FetchRegistryData{
+      reg_data
+      | received_at: :erlang.monotonic_time(:millisecond),
+        received_json: data
+    }
+
+  defp save_registry_data(%FetchRegistryData{uuid: uuid} = reg_data) do
+    {:ok, true} = Cachex.put(@fetches, uuid, reg_data)
+    reg_data
+  end
+
+  defp delete_registry_data(origin),
+    do: {:ok, true} = Cachex.del(@fetches, origin)
+end

lib/pleroma/web/fed_sockets/incoming_handler.ex

@@ -0,0 +1,88 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.IncomingHandler do
+  require Logger
+
+  alias Pleroma.Web.FedSockets.FedRegistry
+  alias Pleroma.Web.FedSockets.FedSocket
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  import HTTPSignatures, only: [validate_conn: 1, split_signature: 1]
+
+  @behaviour :cowboy_websocket
+
+  def init(req, state) do
+    shake = FedSocket.shake()
+
+    with true <- Pleroma.Config.get([:fed_sockets, :enabled]),
+         sec_protocol <- :cowboy_req.header("sec-websocket-protocol", req, nil),
+         headers = %{"(request-target)" => ^shake} <- :cowboy_req.headers(req),
+         true <- validate_conn(%{req_headers: headers}),
+         %{"keyId" => origin} <- split_signature(headers["signature"]) do
+      req =
+        if is_nil(sec_protocol) do
+          req
+        else
+          :cowboy_req.set_resp_header("sec-websocket-protocol", sec_protocol, req)
+        end
+
+      {:cowboy_websocket, req, %{origin: origin}, %{}}
+    else
+      _ ->
+        {:ok, req, state}
+    end
+  end
+
+  def websocket_init(%{origin: origin}) do
+    case FedRegistry.add_fed_socket(origin) do
+      {:ok, socket_info} ->
+        {:ok, socket_info}
+
+      e ->
+        Logger.error("FedSocket websocket_init failed - #{inspect(e)}")
+        {:error, inspect(e)}
+    end
+  end
+
+  # Use the ping to  check if the connection should be expired
+  def websocket_handle(:ping, socket_info) do
+    if SocketInfo.expired?(socket_info) do
+      {:stop, socket_info}
+    else
+      {:ok, socket_info, :hibernate}
+    end
+  end
+
+  def websocket_handle({:text, data}, socket_info) do
+    socket_info = SocketInfo.touch(socket_info)
+
+    case FedSocket.receive_package(socket_info, data) do
+      {:noreply, _} ->
+        {:ok, socket_info}
+
+      {:reply, reply} ->
+        {:reply, {:text, Jason.encode!(reply)}, socket_info}
+
+      {:error, reason} ->
+        Logger.error("incoming error - receive_package: #{inspect(reason)}")
+        {:ok, socket_info}
+    end
+  end
+
+  def websocket_info({:send, message}, socket_info) do
+    socket_info = SocketInfo.touch(socket_info)
+
+    {:reply, {:text, message}, socket_info}
+  end
+
+  def websocket_info(:close, state) do
+    {:stop, state}
+  end
+
+  def websocket_info(message, state) do
+    Logger.debug("#{__MODULE__} unknown message #{inspect(message)}")
+    {:ok, state}
+  end
+end

lib/pleroma/web/fed_sockets/ingester_worker.ex

@@ -0,0 +1,33 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.IngesterWorker do
+  use Pleroma.Workers.WorkerHelper, queue: "ingestion_queue"
+  require Logger
+
+  alias Pleroma.Web.Federator
+
+  @impl Oban.Worker
+  def perform(%Job{args: %{"op" => "ingest", "object" => ingestee}}) do
+    try do
+      ingestee
+      |> Jason.decode!()
+      |> do_ingestion()
+    rescue
+      e ->
+        Logger.error("IngesterWorker error - #{inspect(e)}")
+        e
+    end
+  end
+
+  defp do_ingestion(params) do
+    case Federator.incoming_ap_doc(params) do
+      {:error, reason} ->
+        {:error, reason}
+
+      {:ok, object} ->
+        {:ok, object}
+    end
+  end
+end

lib/pleroma/web/fed_sockets/outgoing_handler.ex

@@ -0,0 +1,151 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.OutgoingHandler do
+  use GenServer
+
+  require Logger
+
+  alias Pleroma.Application
+  alias Pleroma.Web.ActivityPub.InternalFetchActor
+  alias Pleroma.Web.FedSockets
+  alias Pleroma.Web.FedSockets.FedRegistry
+  alias Pleroma.Web.FedSockets.FedSocket
+  alias Pleroma.Web.FedSockets.SocketInfo
+
+  def start_link(uri) do
+    GenServer.start_link(__MODULE__, %{uri: uri})
+  end
+
+  def init(%{uri: uri}) do
+    case initiate_connection(uri) do
+      {:ok, ws_origin, conn_pid} ->
+        FedRegistry.add_fed_socket(ws_origin, conn_pid)
+
+      {:error, reason} ->
+        Logger.debug("Outgoing connection failed - #{inspect(reason)}")
+        :ignore
+    end
+  end
+
+  def handle_info({:gun_ws, conn_pid, _ref, {:text, data}}, socket_info) do
+    socket_info = SocketInfo.touch(socket_info)
+
+    case FedSocket.receive_package(socket_info, data) do
+      {:noreply, _} ->
+        {:noreply, socket_info}
+
+      {:reply, reply} ->
+        :gun.ws_send(conn_pid, {:text, Jason.encode!(reply)})
+        {:noreply, socket_info}
+
+      {:error, reason} ->
+        Logger.error("incoming error - receive_package: #{inspect(reason)}")
+        {:noreply, socket_info}
+    end
+  end
+
+  def handle_info(:close, state) do
+    Logger.debug("Sending close frame !!!!!!!")
+    {:close, state}
+  end
+
+  def handle_info({:gun_down, _pid, _prot, :closed, _}, state) do
+    {:stop, :normal, state}
+  end
+
+  def handle_info({:send, data}, %{conn_pid: conn_pid} = socket_info) do
+    socket_info = SocketInfo.touch(socket_info)
+    :gun.ws_send(conn_pid, {:text, data})
+    {:noreply, socket_info}
+  end
+
+  def handle_info({:gun_ws, _, _, :pong}, state) do
+    {:noreply, state, :hibernate}
+  end
+
+  def handle_info(msg, state) do
+    Logger.debug("#{__MODULE__} unhandled event #{inspect(msg)}")
+    {:noreply, state}
+  end
+
+  def terminate(reason, state) do
+    Logger.debug(
+      "#{__MODULE__} terminating outgoing connection for #{inspect(state)} for #{inspect(reason)}"
+    )
+
+    {:ok, state}
+  end
+
+  def initiate_connection(uri) do
+    ws_uri =
+      uri
+      |> SocketInfo.origin()
+      |> FedSockets.uri_for_origin()
+
+    %{host: host, port: port, path: path} = URI.parse(ws_uri)
+
+    with {:ok, conn_pid} <- :gun.open(to_charlist(host), port, %{protocols: [:http]}),
+         {:ok, _} <- :gun.await_up(conn_pid),
+         reference <-
+           :gun.get(conn_pid, to_charlist(path), [
+             {'user-agent', to_charlist(Application.user_agent())}
+           ]),
+         {:response, :fin, 204, _} <- :gun.await(conn_pid, reference),
+         headers <- build_headers(uri),
+         ref <- :gun.ws_upgrade(conn_pid, to_charlist(path), headers, %{silence_pings: false}) do
+      receive do
+        {:gun_upgrade, ^conn_pid, ^ref, [<<"websocket">>], _} ->
+          {:ok, ws_uri, conn_pid}
+      after
+        15_000 ->
+          Logger.debug("Fedsocket timeout connecting to #{inspect(uri)}")
+          {:error, :timeout}
+      end
+    else
+      {:response, :nofin, 404, _} ->
+        {:error, :fedsockets_not_supported}
+
+      e ->
+        Logger.debug("Fedsocket error connecting to #{inspect(uri)}")
+        {:error, e}
+    end
+  end
+
+  defp build_headers(uri) do
+    host_for_sig = uri |> URI.parse() |> host_signature()
+
+    shake = FedSocket.shake()
+    digest = "SHA-256=" <> (:crypto.hash(:sha256, shake) |> Base.encode64())
+    date = Pleroma.Signature.signed_date()
+    shake_size = byte_size(shake)
+
+    signature_opts = %{
+      "(request-target)": shake,
+      "content-length": to_charlist("#{shake_size}"),
+      date: date,
+      digest: digest,
+      host: host_for_sig
+    }
+
+    signature = Pleroma.Signature.sign(InternalFetchActor.get_actor(), signature_opts)
+
+    [
+      {'signature', to_charlist(signature)},
+      {'date', date},
+      {'digest', to_charlist(digest)},
+      {'content-length', to_charlist("#{shake_size}")},
+      {to_charlist("(request-target)"), to_charlist(shake)},
+      {'user-agent', to_charlist(Application.user_agent())}
+    ]
+  end
+
+  defp host_signature(%{host: host, scheme: scheme, port: port}) do
+    if port == URI.default_port(scheme) do
+      host
+    else
+      "#{host}:#{port}"
+    end
+  end
+end

lib/pleroma/web/fed_sockets/socket_info.ex

@@ -0,0 +1,52 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.SocketInfo do
+  defstruct origin: nil,
+            pid: nil,
+            conn_pid: nil,
+            state: :default,
+            connected_until: nil
+
+  alias Pleroma.Web.FedSockets.SocketInfo
+  @default_connection_duration 15 * 60 * 1000
+
+  def build(uri, conn_pid \\ nil) do
+    uri
+    |> build_origin()
+    |> build_pids(conn_pid)
+    |> touch()
+  end
+
+  def touch(%SocketInfo{} = socket_info),
+    do: %{socket_info | connected_until: new_ttl()}
+
+  def connect(%SocketInfo{} = socket_info),
+    do: %{socket_info | state: :connected}
+
+  def expired?(%{connected_until: connected_until}),
+    do: connected_until < :erlang.monotonic_time(:millisecond)
+
+  def origin(uri),
+    do: build_origin(uri).origin
+
+  defp build_pids(socket_info, conn_pid),
+    do: struct(socket_info, pid: self(), conn_pid: conn_pid)
+
+  defp build_origin(uri) when is_binary(uri),
+    do: uri |> URI.parse() |> build_origin
+
+  defp build_origin(%{host: host, port: nil, scheme: scheme}),
+    do: build_origin(%{host: host, port: URI.default_port(scheme)})
+
+  defp build_origin(%{host: host, port: port}),
+    do: %SocketInfo{origin: "#{host}:#{port}"}
+
+  defp new_ttl do
+    connection_duration =
+      Pleroma.Config.get([:fed_sockets, :connection_duration], @default_connection_duration)
+
+    :erlang.monotonic_time(:millisecond) + connection_duration
+  end
+end

lib/pleroma/web/fed_sockets/supervisor.ex

@@ -0,0 +1,59 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.FedSockets.Supervisor do
+  use Supervisor
+  import Cachex.Spec
+
+  def start_link(opts) do
+    Supervisor.start_link(__MODULE__, opts, name: __MODULE__)
+  end
+
+  def init(args) do
+    children = [
+      build_cache(:fed_socket_fetches, args),
+      build_cache(:fed_socket_rejections, args),
+      {Registry, keys: :unique, name: FedSockets.Registry, meta: [rejected: %{}]}
+    ]
+
+    opts = [strategy: :one_for_all, name: Pleroma.Web.Streamer.Supervisor]
+    Supervisor.init(children, opts)
+  end
+
+  defp build_cache(name, args) do
+    opts = get_opts(name, args)
+
+    %{
+      id: String.to_atom("#{name}_cache"),
+      start: {Cachex, :start_link, [name, opts]},
+      type: :worker
+    }
+  end
+
+  defp get_opts(cache_name, args)
+       when cache_name in [:fed_socket_fetches, :fed_socket_rejections] do
+    default = get_opts_or_config(args, cache_name, :default, 15_000)
+    interval = get_opts_or_config(args, cache_name, :interval, 3_000)
+    lazy = get_opts_or_config(args, cache_name, :lazy, false)
+
+    [expiration: expiration(default: default, interval: interval, lazy: lazy)]
+  end
+
+  defp get_opts(name, args) do
+    Keyword.get(args, name, [])
+  end
+
+  defp get_opts_or_config(args, name, key, default) do
+    args
+    |> Keyword.get(name, [])
+    |> Keyword.get(key)
+    |> case do
+      nil ->
+        Pleroma.Config.get([:fed_sockets, name, key], default)
+
+      value ->
+        value
+    end
+  end
+end

lib/pleroma/web/federator/federator.ex

@@ -66,14 +66,17 @@ defmodule Pleroma.Web.Federator do
   def perform(:incoming_ap_doc, params) do
     Logger.debug("Handling incoming AP activity")
 
-    params = Utils.normalize_params(params)
+    actor =
+      params
+      |> Map.get("actor")
+      |> Utils.get_ap_id()
 
     # NOTE: we use the actor ID to do the containment, this is fine because an
     # actor shouldn't be acting on objects outside their own AP server.
-    with {:ok, _user} <- ap_enabled_actor(params["actor"]),
+    with {_, {:ok, _user}} <- {:actor, ap_enabled_actor(actor)},
          nil <- Activity.normalize(params["id"]),
          {_, :ok} <-
-           {:correct_origin?, Containment.contain_origin_from_id(params["actor"], params)},
+           {:correct_origin?, Containment.contain_origin_from_id(actor, params)},
          {:ok, activity} <- Transmogrifier.handle_incoming(params) do
       {:ok, activity}
     else
@@ -85,10 +88,13 @@ defmodule Pleroma.Web.Federator do
         Logger.debug("Already had #{params["id"]}")
         {:error, :already_present}
 
+      {:actor, e} ->
+        Logger.debug("Unhandled actor #{actor}, #{inspect(e)}")
+        {:error, e}
+
       e ->
         # Just drop those for now
-        Logger.debug("Unhandled activity")
+        Logger.debug(fn -> "Unhandled activity\n" <> Jason.encode!(params, pretty: true) end)
-        Logger.debug(Jason.encode!(params, pretty: true))
         {:error, e}
     end
   end

lib/pleroma/web/instance_document.ex

@@ -0,0 +1,62 @@
+# Pleroma: A lightweight social networking server
+# Copyright © 2017-2020 Pleroma Authors <https://pleroma.social/>
+# SPDX-License-Identifier: AGPL-3.0-only
+
+defmodule Pleroma.Web.InstanceDocument do
+  alias Pleroma.Config
+  alias Pleroma.Web.Endpoint
+
+  @instance_documents %{
+    "terms-of-service" => "/static/terms-of-service.html",
+    "instance-panel" => "/instance/panel.html"
+  }
+
+  @spec get(String.t()) :: {:ok, String.t()} | {:error, atom()}
+  def get(document_name) do
+    case Map.fetch(@instance_documents, document_name) do
+      {:ok, path} -> {:ok, path}
+      _ -> {:error, :not_found}
+    end
+  end
+
+  @spec put(String.t(), String.t()) :: {:ok, String.t()} | {:error, atom()}
+  def put(document_name, origin_path) do
+    with {_, {:ok, destination_path}} <-
+           {:instance_document, Map.fetch(@instance_documents, document_name)},
+         :ok <- put_file(origin_path, destination_path) do
+      {:ok, Path.join(Endpoint.url(), destination_path)}
+    else
+      {:instance_document, :error} -> {:error, :not_found}
+      error -> error
+    end
+  end
+
+  @spec delete(String.t()) :: :ok | {:error, atom()}
+  def delete(document_name) do
+    with {_, {:ok, path}} <- {:instance_document, Map.fetch(@instance_documents, document_name)},
+         instance_static_dir_path <- instance_static_dir(path),
+         :ok <- File.rm(instance_static_dir_path) do
+      :ok
+    else
+      {:instance_document, :error} -> {:error, :not_found}
+      {:error, :enoent} -> {:error, :not_found}
+      error -> error
+    end
+  end
+
+  defp put_file(origin_path, destination_path) do
+    with destination <- instance_static_dir(destination_path),
+         {_, :ok} <- {:mkdir_p, File.mkdir_p(Path.dirname(destination))},
+         {_, {:ok, _}} <- {:copy, File.copy(origin_path, destination)} do
+      :ok
+    else
+      {error, _} -> {:error, error}
+    end
+  end
+
+  defp instance_static_dir(filename) do
+    [:instance, :static_dir]
+    |> Config.get!()
+    |> Path.join(filename)
+  end
+end

lib/pleroma/web/mastodon_api/views/account_view.ex

@@ -181,8 +181,10 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
     user = User.sanitize_html(user, User.html_filter_policy(opts[:for]))
     display_name = user.name || user.nickname
 
-    image = User.avatar_url(user) |> MediaProxy.url()
+    avatar = User.avatar_url(user) |> MediaProxy.url()
+    avatar_static = User.avatar_url(user) |> MediaProxy.preview_url(static: true)
     header = User.banner_url(user) |> MediaProxy.url()
+    header_static = User.banner_url(user) |> MediaProxy.preview_url(static: true)
 
     following_count =
       if !user.hide_follows_count or !user.hide_follows or opts[:for] == user do
@@ -247,10 +249,10 @@ defmodule Pleroma.Web.MastodonAPI.AccountView do
       statuses_count: user.note_count,
       note: user.bio,
       url: user.uri || user.ap_id,
-      avatar: image,
+      avatar: avatar,
-      avatar_static: image,
+      avatar_static: avatar_static,
       header: header,
-      header_static: header,
+      header_static: header_static,
       emojis: emojis,
       fields: user.fields,
       bot: bot,

lib/pleroma/web/mastodon_api/views/status_view.ex

@@ -8,7 +8,6 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   require Pleroma.Constants
 
   alias Pleroma.Activity
-  alias Pleroma.ActivityExpiration
   alias Pleroma.HTML
   alias Pleroma.Object
   alias Pleroma.Repo
@@ -56,23 +55,6 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     end)
   end
 
-  def get_user(ap_id, fake_record_fallback \\ true) do
-    cond do
-      user = User.get_cached_by_ap_id(ap_id) ->
-        user
-
-      user = User.get_by_guessed_nickname(ap_id) ->
-        user
-
-      fake_record_fallback ->
-        # TODO: refactor (fake records is never a good idea)
-        User.error_user(ap_id)
-
-      true ->
-        nil
-    end
-  end
-
   defp get_context_id(%{data: %{"context_id" => context_id}}) when not is_nil(context_id),
     do: context_id
 
@@ -120,7 +102,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
           # Note: unresolved users are filtered out
           actors =
             (activities ++ parent_activities)
-            |> Enum.map(&get_user(&1.data["actor"], false))
+            |> Enum.map(&CommonAPI.get_user(&1.data["actor"], false))
             |> Enum.filter(& &1)
 
           UserRelationship.view_relationships_option(reading_user, actors, subset: :source_mutes)
@@ -139,7 +121,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
         "show.json",
         %{activity: %{data: %{"type" => "Announce", "object" => _object}} = activity} = opts
       ) do
-    user = get_user(activity.data["actor"])
+    user = CommonAPI.get_user(activity.data["actor"])
     created_at = Utils.to_masto_date(activity.data["published"])
     activity_object = Object.normalize(activity)
 
@@ -212,7 +194,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
   def render("show.json", %{activity: %{data: %{"object" => _object}} = activity} = opts) do
     object = Object.normalize(activity)
 
-    user = get_user(activity.data["actor"])
+    user = CommonAPI.get_user(activity.data["actor"])
     user_follower_address = user.follower_address
 
     like_count = object.data["like_count"] || 0
@@ -245,8 +227,8 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
     expires_at =
       with true <- client_posted_this_activity,
-           %ActivityExpiration{scheduled_at: scheduled_at} <-
+           %Oban.Job{scheduled_at: scheduled_at} <-
-             ActivityExpiration.get_by_activity_id(activity.id) do
+             Pleroma.Workers.PurgeExpiredActivity.get_expiration(activity.id) do
         scheduled_at
       else
         _ -> nil
@@ -266,7 +248,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
 
     reply_to = get_reply_to(activity, opts)
 
-    reply_to_user = reply_to && get_user(reply_to.data["actor"])
+    reply_to_user = reply_to && CommonAPI.get_user(reply_to.data["actor"])
 
     content =
       object
@@ -433,6 +415,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
     [attachment_url | _] = attachment["url"]
     media_type = attachment_url["mediaType"] || attachment_url["mimeType"] || "image"
     href = attachment_url["href"] |> MediaProxy.url()
+    href_preview = attachment_url["href"] |> MediaProxy.preview_url()
 
     type =
       cond do
@@ -448,7 +431,7 @@ defmodule Pleroma.Web.MastodonAPI.StatusView do
       id: to_string(attachment["id"] || hash_id),
       url: href,
       remote_url: href,
-      preview_url: href,
+      preview_url: href_preview,
       text_url: href,
       type: type,
       description: attachment["name"],

lib/pleroma/web/mastodon_api/websocket_handler.ex

@@ -23,8 +23,8 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     with params <- Enum.into(:cow_qs.parse_qs(qs), %{}),
          sec_websocket <- :cowboy_req.header("sec-websocket-protocol", req, nil),
          access_token <- Map.get(params, "access_token"),
-         {:ok, user} <- authenticate_request(access_token, sec_websocket),
+         {:ok, user, oauth_token} <- authenticate_request(access_token, sec_websocket),
-         {:ok, topic} <- Streamer.get_topic(Map.get(params, "stream"), user, params) do
+         {:ok, topic} <- Streamer.get_topic(params["stream"], user, oauth_token, params) do
       req =
         if sec_websocket do
           :cowboy_req.set_resp_header("sec-websocket-protocol", sec_websocket, req)
@@ -37,12 +37,12 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     else
       {:error, :bad_topic} ->
         Logger.debug("#{__MODULE__} bad topic #{inspect(req)}")
-        {:ok, req} = :cowboy_req.reply(404, req)
+        req = :cowboy_req.reply(404, req)
         {:ok, req, state}
 
       {:error, :unauthorized} ->
         Logger.debug("#{__MODULE__} authentication error: #{inspect(req)}")
-        {:ok, req} = :cowboy_req.reply(401, req)
+        req = :cowboy_req.reply(401, req)
         {:ok, req, state}
     end
   end
@@ -64,7 +64,9 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     {:ok, %{state | timer: timer()}}
   end
 
-  # We never receive messages.
+  # We only receive pings for now
+  def websocket_handle(:ping, state), do: {:ok, state}
+
   def websocket_handle(frame, state) do
     Logger.error("#{__MODULE__} received frame: #{inspect(frame)}")
     {:ok, state}
@@ -98,6 +100,10 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     {:reply, :ping, %{state | timer: nil, count: 0}, :hibernate}
   end
 
+  # State can be `[]` only in case we terminate before switching to websocket,
+  # we already log errors for these cases in `init/1`, so just do nothing here
+  def terminate(_reason, _req, []), do: :ok
+
   def terminate(reason, _req, state) do
     Logger.debug(
       "#{__MODULE__} terminating websocket connection for user #{
@@ -111,7 +117,7 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
 
   # Public streams without authentication.
   defp authenticate_request(nil, nil) do
-    {:ok, nil}
+    {:ok, nil, nil}
   end
 
   # Authenticated streams.
@@ -119,9 +125,9 @@ defmodule Pleroma.Web.MastodonAPI.WebsocketHandler do
     token = access_token || sec_websocket
 
     with true <- is_bitstring(token),
-         %Token{user_id: user_id} <- Repo.get_by(Token, token: token),
+         oauth_token = %Token{user_id: user_id} <- Repo.get_by(Token, token: token),
          user = %User{} <- User.get_cached_by_id(user_id) do
-      {:ok, user}
+      {:ok, user, oauth_token}
     else
       _ -> {:error, :unauthorized}
     end

lib/pleroma/web/media_proxy/invalidation.ex

@@ -33,6 +33,8 @@ defmodule Pleroma.Web.MediaProxy.Invalidation do
   def prepare_urls(urls) do
     urls
     |> List.wrap()
-    |> Enum.map(&MediaProxy.url/1)
+    |> Enum.map(fn url -> [MediaProxy.url(url), MediaProxy.preview_url(url)] end)
+    |> List.flatten()
+    |> Enum.uniq()
   end
 end

lib/pleroma/web/media_proxy/media_proxy.ex

@@ -4,6 +4,7 @@
 
 defmodule Pleroma.Web.MediaProxy do
   alias Pleroma.Config
+  alias Pleroma.Helpers.UriHelper
   alias Pleroma.Upload
   alias Pleroma.Web
   alias Pleroma.Web.MediaProxy.Invalidation
@@ -40,27 +41,35 @@ defmodule Pleroma.Web.MediaProxy do
   def url("/" <> _ = url), do: url
 
   def url(url) do
-    if disabled?() or not url_proxiable?(url) do
+    if enabled?() and url_proxiable?(url) do
-      url
-    else
       encode_url(url)
+    else
+      url
     end
   end
 
   @spec url_proxiable?(String.t()) :: boolean()
   def url_proxiable?(url) do
-    if local?(url) or whitelisted?(url) do
+    not local?(url) and not whitelisted?(url)
-      false
+  end
+
+  def preview_url(url, preview_params \\ []) do
+    if preview_enabled?() do
+      encode_preview_url(url, preview_params)
     else
-      true
+      url(url)
     end
   end
 
-  defp disabled?, do: !Config.get([:media_proxy, :enabled], false)
+  def enabled?, do: Config.get([:media_proxy, :enabled], false)
 
-  defp local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
+  # Note: media proxy must be enabled for media preview proxy in order to load all
+  #   non-local non-whitelisted URLs through it and be sure that body size constraint is preserved.
+  def preview_enabled?, do: enabled?() and !!Config.get([:media_preview_proxy, :enabled])
 
-  defp whitelisted?(url) do
+  def local?(url), do: String.starts_with?(url, Pleroma.Web.base_url())
+
+  def whitelisted?(url) do
     %{host: domain} = URI.parse(url)
 
     mediaproxy_whitelist_domains =
@@ -85,17 +94,29 @@ defmodule Pleroma.Web.MediaProxy do
 
   defp maybe_get_domain_from_url(domain), do: domain
 
-  def encode_url(url) do
+  defp base64_sig64(url) do
     base64 = Base.url_encode64(url, @base64_opts)
 
     sig64 =
       base64
-      |> signed_url
+      |> signed_url()
       |> Base.url_encode64(@base64_opts)
 
+    {base64, sig64}
+  end
+
+  def encode_url(url) do
+    {base64, sig64} = base64_sig64(url)
+
     build_url(sig64, base64, filename(url))
   end
 
+  def encode_preview_url(url, preview_params \\ []) do
+    {base64, sig64} = base64_sig64(url)
+
+    build_preview_url(sig64, base64, filename(url), preview_params)
+  end
+
   def decode_url(sig, url) do
     with {:ok, sig} <- Base.url_decode64(sig, @base64_opts),
          signature when signature == sig <- signed_url(url) do
@@ -113,10 +134,14 @@ defmodule Pleroma.Web.MediaProxy do
     if path = URI.parse(url_or_path).path, do: Path.basename(path)
   end
 
-  def build_url(sig_base64, url_base64, filename \\ nil) do
+  def base_url do
+    Config.get([:media_proxy, :base_url], Web.base_url())
+  end
+
+  defp proxy_url(path, sig_base64, url_base64, filename) do
     [
-      Config.get([:media_proxy, :base_url], Web.base_url()),
+      base_url(),
-      "proxy",
+      path,
       sig_base64,
       url_base64,
       filename
@@ -124,4 +149,38 @@ defmodule Pleroma.Web.MediaProxy do
     |> Enum.filter(& &1)
     |> Path.join()
   end
+
+  def build_url(sig_base64, url_base64, filename \\ nil) do
+    proxy_url("proxy", sig_base64, url_base64, filename)
+  end
+
+  def build_preview_url(sig_base64, url_base64, filename \\ nil, preview_params \\ []) do
+    uri = proxy_url("proxy/preview", sig_base64, url_base64, filename)
+
+    UriHelper.modify_uri_params(uri, preview_params)
+  end
+
+  def verify_request_path_and_url(
+        %Plug.Conn{params: %{"filename" => _}, request_path: request_path},
+        url
+      ) do
+    verify_request_path_and_url(request_path, url)
+  end
+
+  def verify_request_path_and_url(request_path, url) when is_binary(request_path) do
+    filename = filename(url)
+
+    if filename && not basename_matches?(request_path, filename) do
+      {:wrong_filename, filename}
+    else
+      :ok
+    end
+  end
+
+  def verify_request_path_and_url(_, _), do: :ok
+
+  defp basename_matches?(path, filename) do
+    basename = Path.basename(path)
+    basename == filename or URI.decode(basename) == filename or URI.encode(basename) == filename
+  end
 end

lib/pleroma/web/media_proxy/media_proxy_controller.ex

@@ -5,44 +5,201 @@
 defmodule Pleroma.Web.MediaProxy.MediaProxyController do
   use Pleroma.Web, :controller
 
+  alias Pleroma.Config
+  alias Pleroma.Helpers.MediaHelper
+  alias Pleroma.Helpers.UriHelper
   alias Pleroma.ReverseProxy
   alias Pleroma.Web.MediaProxy
+  alias Plug.Conn
 
-  @default_proxy_opts [max_body_length: 25 * 1_048_576, http: [follow_redirect: true]]
+  def remote(conn, %{"sig" => sig64, "url" => url64}) do
-
+    with {_, true} <- {:enabled, MediaProxy.enabled?()},
-  def remote(conn, %{"sig" => sig64, "url" => url64} = params) do
-    with config <- Pleroma.Config.get([:media_proxy], []),
-         true <- Keyword.get(config, :enabled, false),
          {:ok, url} <- MediaProxy.decode_url(sig64, url64),
          {_, false} <- {:in_banned_urls, MediaProxy.in_banned_urls(url)},
-         :ok <- filename_matches(params, conn.request_path, url) do
+         :ok <- MediaProxy.verify_request_path_and_url(conn, url) do
-      ReverseProxy.call(conn, url, Keyword.get(config, :proxy_opts, @default_proxy_opts))
+      ReverseProxy.call(conn, url, media_proxy_opts())
     else
-      error when error in [false, {:in_banned_urls, true}] ->
+      {:enabled, false} ->
-        send_resp(conn, 404, Plug.Conn.Status.reason_phrase(404))
+        send_resp(conn, 404, Conn.Status.reason_phrase(404))
+
+      {:in_banned_urls, true} ->
+        send_resp(conn, 404, Conn.Status.reason_phrase(404))
 
       {:error, :invalid_signature} ->
-        send_resp(conn, 403, Plug.Conn.Status.reason_phrase(403))
+        send_resp(conn, 403, Conn.Status.reason_phrase(403))
 
       {:wrong_filename, filename} ->
         redirect(conn, external: MediaProxy.build_url(sig64, url64, filename))
     end
   end
 
-  def filename_matches(%{"filename" => _} = _, path, url) do
+  def preview(%Conn{} = conn, %{"sig" => sig64, "url" => url64}) do
-    filename = MediaProxy.filename(url)
+    with {_, true} <- {:enabled, MediaProxy.preview_enabled?()},
-
+         {:ok, url} <- MediaProxy.decode_url(sig64, url64),
-    if filename && does_not_match(path, filename) do
+         :ok <- MediaProxy.verify_request_path_and_url(conn, url) do
-      {:wrong_filename, filename}
+      handle_preview(conn, url)
     else
-      :ok
+      {:enabled, false} ->
+        send_resp(conn, 404, Conn.Status.reason_phrase(404))
+
+      {:error, :invalid_signature} ->
+        send_resp(conn, 403, Conn.Status.reason_phrase(403))
+
+      {:wrong_filename, filename} ->
+        redirect(conn, external: MediaProxy.build_preview_url(sig64, url64, filename))
     end
   end
 
-  def filename_matches(_, _, _), do: :ok
+  defp handle_preview(conn, url) do
+    media_proxy_url = MediaProxy.url(url)
 
-  defp does_not_match(path, filename) do
+    with {:ok, %{status: status} = head_response} when status in 200..299 <-
-    basename = Path.basename(path)
+           Pleroma.HTTP.request("head", media_proxy_url, [], [], pool: :media) do
-    basename != filename and URI.decode(basename) != filename and URI.encode(basename) != filename
+      content_type = Tesla.get_header(head_response, "content-type")
+      content_length = Tesla.get_header(head_response, "content-length")
+      content_length = content_length && String.to_integer(content_length)
+      static = conn.params["static"] in ["true", true]
+
+      cond do
+        static and content_type == "image/gif" ->
+          handle_jpeg_preview(conn, media_proxy_url)
+
+        static ->
+          drop_static_param_and_redirect(conn)
+
+        content_type == "image/gif" ->
+          redirect(conn, external: media_proxy_url)
+
+        min_content_length_for_preview() > 0 and content_length > 0 and
+            content_length < min_content_length_for_preview() ->
+          redirect(conn, external: media_proxy_url)
+
+        true ->
+          handle_preview(content_type, conn, media_proxy_url)
+      end
+    else
+      # If HEAD failed, redirecting to media proxy URI doesn't make much sense; returning an error
+      {_, %{status: status}} ->
+        send_resp(conn, :failed_dependency, "Can't fetch HTTP headers (HTTP #{status}).")
+
+      {:error, :recv_response_timeout} ->
+        send_resp(conn, :failed_dependency, "HEAD request timeout.")
+
+      _ ->
+        send_resp(conn, :failed_dependency, "Can't fetch HTTP headers.")
+    end
+  end
+
+  defp handle_preview("image/png" <> _ = _content_type, conn, media_proxy_url) do
+    handle_png_preview(conn, media_proxy_url)
+  end
+
+  defp handle_preview("image/" <> _ = _content_type, conn, media_proxy_url) do
+    handle_jpeg_preview(conn, media_proxy_url)
+  end
+
+  defp handle_preview("video/" <> _ = _content_type, conn, media_proxy_url) do
+    handle_video_preview(conn, media_proxy_url)
+  end
+
+  defp handle_preview(_unsupported_content_type, conn, media_proxy_url) do
+    fallback_on_preview_error(conn, media_proxy_url)
+  end
+
+  defp handle_png_preview(conn, media_proxy_url) do
+    quality = Config.get!([:media_preview_proxy, :image_quality])
+    {thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
+
+    with {:ok, thumbnail_binary} <-
+           MediaHelper.image_resize(
+             media_proxy_url,
+             %{
+               max_width: thumbnail_max_width,
+               max_height: thumbnail_max_height,
+               quality: quality,
+               format: "png"
+             }
+           ) do
+      conn
+      |> put_preview_response_headers(["image/png", "preview.png"])
+      |> send_resp(200, thumbnail_binary)
+    else
+      _ ->
+        fallback_on_preview_error(conn, media_proxy_url)
+    end
+  end
+
+  defp handle_jpeg_preview(conn, media_proxy_url) do
+    quality = Config.get!([:media_preview_proxy, :image_quality])
+    {thumbnail_max_width, thumbnail_max_height} = thumbnail_max_dimensions()
+
+    with {:ok, thumbnail_binary} <-
+           MediaHelper.image_resize(
+             media_proxy_url,
+             %{max_width: thumbnail_max_width, max_height: thumbnail_max_height, quality: quality}
+           ) do
+      conn
+      |> put_preview_response_headers()
+      |> send_resp(200, thumbnail_binary)
+    else
+      _ ->
+        fallback_on_preview_error(conn, media_proxy_url)
+    end
+  end
+
+  defp handle_video_preview(conn, media_proxy_url) do
+    with {:ok, thumbnail_binary} <-
+           MediaHelper.video_framegrab(media_proxy_url) do
+      conn
+      |> put_preview_response_headers()
+      |> send_resp(200, thumbnail_binary)
+    else
+      _ ->
+        fallback_on_preview_error(conn, media_proxy_url)
+    end
+  end
+
+  defp drop_static_param_and_redirect(conn) do
+    uri_without_static_param =
+      conn
+      |> current_url()
+      |> UriHelper.modify_uri_params(%{}, ["static"])
+
+    redirect(conn, external: uri_without_static_param)
+  end
+
+  defp fallback_on_preview_error(conn, media_proxy_url) do
+    redirect(conn, external: media_proxy_url)
+  end
+
+  defp put_preview_response_headers(
+         conn,
+         [content_type, filename] = _content_info \\ ["image/jpeg", "preview.jpg"]
+       ) do
+    conn
+    |> put_resp_header("content-type", content_type)
+    |> put_resp_header("content-disposition", "inline; filename=\"#{filename}\"")
+    |> put_resp_header("cache-control", ReverseProxy.default_cache_control_header())
+  end
+
+  defp thumbnail_max_dimensions do
+    config = media_preview_proxy_config()
+
+    thumbnail_max_width = Keyword.fetch!(config, :thumbnail_max_width)
+    thumbnail_max_height = Keyword.fetch!(config, :thumbnail_max_height)
+
+    {thumbnail_max_width, thumbnail_max_height}
+  end
+
+  defp min_content_length_for_preview do
+    Keyword.get(media_preview_proxy_config(), :min_content_length, 0)
+  end
+
+  defp media_preview_proxy_config do
+    Config.get!([:media_preview_proxy])
+  end
+
+  defp media_proxy_opts do
+    Config.get([:media_proxy, :proxy_opts], [])
   end
 end

lib/pleroma/web/metadata/restrict_indexing.ex

@@ -10,7 +10,9 @@ defmodule Pleroma.Web.Metadata.Providers.RestrictIndexing do
   """
 
   @impl true
-  def build_tags(%{user: %{local: false}}) do
+  def build_tags(%{user: %{local: true, discoverable: true}}), do: []
+
+  def build_tags(_) do
     [
       {:meta,
        [
@@ -19,7 +21,4 @@ defmodule Pleroma.Web.Metadata.Providers.RestrictIndexing do
        ], []}
     ]
   end
-
-  @impl true
-  def build_tags(%{user: %{local: true}}), do: []
 end

lib/pleroma/web/metadata/utils.ex

@@ -38,7 +38,7 @@ defmodule Pleroma.Web.Metadata.Utils do
   def scrub_html(content), do: content
 
   def attachment_url(url) do
-    MediaProxy.url(url)
+    MediaProxy.preview_url(url)
   end
 
   def user_name_string(user) do

lib/pleroma/web/oauth/oauth_controller.ex

@@ -119,7 +119,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
       redirect_uri = redirect_uri(conn, redirect_uri)
       url_params = %{access_token: token.token}
       url_params = Maps.put_if_present(url_params, :state, params["state"])
-      url = UriHelper.append_uri_params(redirect_uri, url_params)
+      url = UriHelper.modify_uri_params(redirect_uri, url_params)
       redirect(conn, external: url)
     else
       conn
@@ -145,7 +145,10 @@ defmodule Pleroma.Web.OAuth.OAuthController do
   def after_create_authorization(%Plug.Conn{} = conn, %Authorization{} = auth, %{
         "authorization" => %{"redirect_uri" => @oob_token_redirect_uri}
       }) do
-    render(conn, "oob_authorization_created.html", %{auth: auth})
+    # Enforcing the view to reuse the template when calling from other controllers
+    conn
+    |> put_view(OAuthView)
+    |> render("oob_authorization_created.html", %{auth: auth})
   end
 
   def after_create_authorization(%Plug.Conn{} = conn, %Authorization{} = auth, %{
@@ -158,7 +161,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
       redirect_uri = redirect_uri(conn, redirect_uri)
       url_params = %{code: auth.token}
       url_params = Maps.put_if_present(url_params, :state, auth_attrs["state"])
-      url = UriHelper.append_uri_params(redirect_uri, url_params)
+      url = UriHelper.modify_uri_params(redirect_uri, url_params)
       redirect(conn, external: url)
     else
       conn
@@ -197,7 +200,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
          {:mfa_required, user, auth, _},
          params
        ) do
-    {:ok, token} = MFA.Token.create_token(user, auth)
+    {:ok, token} = MFA.Token.create(user, auth)
 
     data = %{
       "mfa_token" => token.token,
@@ -579,7 +582,7 @@ defmodule Pleroma.Web.OAuth.OAuthController do
     do: put_session(conn, :registration_id, registration_id)
 
   defp build_and_response_mfa_token(user, auth) do
-    with {:ok, token} <- MFA.Token.create_token(user, auth) do
+    with {:ok, token} <- MFA.Token.create(user, auth) do
       MFAView.render("mfa_response.json", %{token: token, user: user})
     end
   end