72 lines
1.9 KiB
JavaScript
72 lines
1.9 KiB
JavaScript
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const Minipass = require('minipass')
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const _data = Symbol('_data')
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const _length = Symbol('_length')
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class Collect extends Minipass {
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constructor (options) {
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super(options)
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this[_data] = []
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this[_length] = 0
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}
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write (chunk, encoding, cb) {
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if (typeof encoding === 'function')
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cb = encoding, encoding = 'utf8'
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if (!encoding)
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encoding = 'utf8'
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const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
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this[_data].push(c)
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this[_length] += c.length
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if (cb)
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cb()
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return true
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}
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end (chunk, encoding, cb) {
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if (typeof chunk === 'function')
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cb = chunk, chunk = null
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if (typeof encoding === 'function')
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cb = encoding, encoding = 'utf8'
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if (chunk)
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this.write(chunk, encoding)
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const result = Buffer.concat(this[_data], this[_length])
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super.write(result)
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return super.end(cb)
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}
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}
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module.exports = Collect
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// it would be possible to DRY this a bit by doing something like
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// this.collector = new Collect() and listening on its data event,
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// but it's not much code, and we may as well save the extra obj
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class CollectPassThrough extends Minipass {
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constructor (options) {
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super(options)
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this[_data] = []
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this[_length] = 0
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}
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write (chunk, encoding, cb) {
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if (typeof encoding === 'function')
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cb = encoding, encoding = 'utf8'
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if (!encoding)
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encoding = 'utf8'
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const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
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this[_data].push(c)
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this[_length] += c.length
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return super.write(chunk, encoding, cb)
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}
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end (chunk, encoding, cb) {
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if (typeof chunk === 'function')
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cb = chunk, chunk = null
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if (typeof encoding === 'function')
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cb = encoding, encoding = 'utf8'
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if (chunk)
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this.write(chunk, encoding)
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const result = Buffer.concat(this[_data], this[_length])
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this.emit('collect', result)
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return super.end(cb)
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}
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}
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module.exports.PassThrough = CollectPassThrough
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