197 lines
7.3 KiB
JavaScript
197 lines
7.3 KiB
JavaScript
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"use strict";
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var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
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function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
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return new (P || (P = Promise))(function (resolve, reject) {
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function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
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function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
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function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
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step((generator = generator.apply(thisArg, _arguments || [])).next());
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});
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};
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var __importDefault = (this && this.__importDefault) || function (mod) {
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return (mod && mod.__esModule) ? mod : { "default": mod };
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};
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Object.defineProperty(exports, "__esModule", { value: true });
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exports.SocksProxyAgent = void 0;
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const socks_1 = require("socks");
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const agent_base_1 = require("agent-base");
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const debug_1 = __importDefault(require("debug"));
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const dns_1 = __importDefault(require("dns"));
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const tls_1 = __importDefault(require("tls"));
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const debug = (0, debug_1.default)('socks-proxy-agent');
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function parseSocksProxy(opts) {
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var _a;
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let port = 0;
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let lookup = false;
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let type = 5;
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const host = opts.hostname;
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if (host == null) {
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throw new TypeError('No "host"');
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}
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if (typeof opts.port === 'number') {
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port = opts.port;
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}
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else if (typeof opts.port === 'string') {
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port = parseInt(opts.port, 10);
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}
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// From RFC 1928, Section 3: https://tools.ietf.org/html/rfc1928#section-3
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// "The SOCKS service is conventionally located on TCP port 1080"
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if (port == null) {
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port = 1080;
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}
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// figure out if we want socks v4 or v5, based on the "protocol" used.
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// Defaults to 5.
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if (opts.protocol != null) {
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switch (opts.protocol.replace(':', '')) {
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case 'socks4':
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lookup = true;
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// pass through
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case 'socks4a':
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type = 4;
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break;
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case 'socks5':
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lookup = true;
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// pass through
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case 'socks': // no version specified, default to 5h
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case 'socks5h':
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type = 5;
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break;
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default:
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throw new TypeError(`A "socks" protocol must be specified! Got: ${String(opts.protocol)}`);
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}
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}
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if (typeof opts.type !== 'undefined') {
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if (opts.type === 4 || opts.type === 5) {
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type = opts.type;
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}
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else {
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throw new TypeError(`"type" must be 4 or 5, got: ${String(opts.type)}`);
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}
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}
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const proxy = {
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host,
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port,
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type
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};
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let userId = (_a = opts.userId) !== null && _a !== void 0 ? _a : opts.username;
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let password = opts.password;
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if (opts.auth != null) {
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const auth = opts.auth.split(':');
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userId = auth[0];
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password = auth[1];
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}
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if (userId != null) {
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Object.defineProperty(proxy, 'userId', {
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value: userId,
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enumerable: false
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});
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}
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if (password != null) {
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Object.defineProperty(proxy, 'password', {
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value: password,
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enumerable: false
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});
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}
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return { lookup, proxy };
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}
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const normalizeProxyOptions = (input) => {
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let proxyOptions;
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if (typeof input === 'string') {
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proxyOptions = new URL(input);
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}
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else {
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proxyOptions = input;
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}
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if (proxyOptions == null) {
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throw new TypeError('a SOCKS proxy server `host` and `port` must be specified!');
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}
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return proxyOptions;
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};
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class SocksProxyAgent extends agent_base_1.Agent {
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constructor(input, options) {
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var _a;
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const proxyOptions = normalizeProxyOptions(input);
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super(proxyOptions);
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const parsedProxy = parseSocksProxy(proxyOptions);
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this.shouldLookup = parsedProxy.lookup;
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this.proxy = parsedProxy.proxy;
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this.tlsConnectionOptions = proxyOptions.tls != null ? proxyOptions.tls : {};
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this.timeout = (_a = options === null || options === void 0 ? void 0 : options.timeout) !== null && _a !== void 0 ? _a : null;
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}
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/**
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* Initiates a SOCKS connection to the specified SOCKS proxy server,
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* which in turn connects to the specified remote host and port.
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*
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* @api protected
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*/
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callback(req, opts) {
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var _a;
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return __awaiter(this, void 0, void 0, function* () {
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const { shouldLookup, proxy, timeout } = this;
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let { host, port, lookup: lookupCallback } = opts;
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if (host == null) {
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throw new Error('No `host` defined!');
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}
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if (shouldLookup) {
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// Client-side DNS resolution for "4" and "5" socks proxy versions.
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host = yield new Promise((resolve, reject) => {
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// Use the request's custom lookup, if one was configured:
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const lookupFn = lookupCallback !== null && lookupCallback !== void 0 ? lookupCallback : dns_1.default.lookup;
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lookupFn(host, {}, (err, res) => {
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if (err) {
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reject(err);
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}
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else {
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resolve(res);
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}
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});
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});
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}
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const socksOpts = {
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proxy,
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destination: { host, port },
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command: 'connect',
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timeout: timeout !== null && timeout !== void 0 ? timeout : undefined
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};
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const cleanup = (tlsSocket) => {
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req.destroy();
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socket.destroy();
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if (tlsSocket)
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tlsSocket.destroy();
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};
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debug('Creating socks proxy connection: %o', socksOpts);
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const { socket } = yield socks_1.SocksClient.createConnection(socksOpts);
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debug('Successfully created socks proxy connection');
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if (timeout !== null) {
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socket.setTimeout(timeout);
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socket.on('timeout', () => cleanup());
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}
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if (opts.secureEndpoint) {
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// The proxy is connecting to a TLS server, so upgrade
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// this socket connection to a TLS connection.
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debug('Upgrading socket connection to TLS');
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const servername = (_a = opts.servername) !== null && _a !== void 0 ? _a : opts.host;
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const tlsSocket = tls_1.default.connect(Object.assign(Object.assign(Object.assign({}, omit(opts, 'host', 'hostname', 'path', 'port')), { socket,
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servername }), this.tlsConnectionOptions));
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tlsSocket.once('error', (error) => {
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debug('socket TLS error', error.message);
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cleanup(tlsSocket);
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});
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return tlsSocket;
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}
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return socket;
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});
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}
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}
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exports.SocksProxyAgent = SocksProxyAgent;
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function omit(obj, ...keys) {
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const ret = {};
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let key;
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for (key in obj) {
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if (!keys.includes(key)) {
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ret[key] = obj[key];
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}
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}
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return ret;
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}
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//# sourceMappingURL=index.js.map
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