You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
72 lines
1.9 KiB
72 lines
1.9 KiB
4 years ago
|
const Minipass = require('minipass')
|
||
|
|
const _data = Symbol('_data')
|
||
|
|
const _length = Symbol('_length')
|
||
|
|
class Collect extends Minipass {
|
||
|
|
constructor (options) {
|
||
|
|
super(options)
|
||
|
|
this[_data] = []
|
||
|
|
this[_length] = 0
|
||
|
|
}
|
||
|
|
write (chunk, encoding, cb) {
|
||
|
|
if (typeof encoding === 'function')
|
||
|
|
cb = encoding, encoding = 'utf8'
|
||
|
|
|
||
|
|
if (!encoding)
|
||
|
|
encoding = 'utf8'
|
||
|
|
|
||
|
|
const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
|
||
|
|
this[_data].push(c)
|
||
|
|
this[_length] += c.length
|
||
|
|
if (cb)
|
||
|
|
cb()
|
||
|
|
return true
|
||
|
|
}
|
||
|
|
end (chunk, encoding, cb) {
|
||
|
|
if (typeof chunk === 'function')
|
||
|
|
cb = chunk, chunk = null
|
||
|
|
if (typeof encoding === 'function')
|
||
|
|
cb = encoding, encoding = 'utf8'
|
||
|
|
if (chunk)
|
||
|
|
this.write(chunk, encoding)
|
||
|
|
const result = Buffer.concat(this[_data], this[_length])
|
||
|
|
super.write(result)
|
||
|
|
return super.end(cb)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module.exports = Collect
|
||
|
|
|
||
|
|
// it would be possible to DRY this a bit by doing something like
|
||
|
|
// this.collector = new Collect() and listening on its data event,
|
||
|
|
// but it's not much code, and we may as well save the extra obj
|
||
|
|
class CollectPassThrough extends Minipass {
|
||
|
|
constructor (options) {
|
||
|
|
super(options)
|
||
|
|
this[_data] = []
|
||
|
|
this[_length] = 0
|
||
|
|
}
|
||
|
|
write (chunk, encoding, cb) {
|
||
|
|
if (typeof encoding === 'function')
|
||
|
|
cb = encoding, encoding = 'utf8'
|
||
|
|
|
||
|
|
if (!encoding)
|
||
|
|
encoding = 'utf8'
|
||
|
|
|
||
|
|
const c = Buffer.isBuffer(chunk) ? chunk : Buffer.from(chunk, encoding)
|
||
|
|
this[_data].push(c)
|
||
|
|
this[_length] += c.length
|
||
|
|
return super.write(chunk, encoding, cb)
|
||
|
|
}
|
||
|
|
end (chunk, encoding, cb) {
|
||
|
|
if (typeof chunk === 'function')
|
||
|
|
cb = chunk, chunk = null
|
||
|
|
if (typeof encoding === 'function')
|
||
|
|
cb = encoding, encoding = 'utf8'
|
||
|
|
if (chunk)
|
||
|
|
this.write(chunk, encoding)
|
||
|
|
const result = Buffer.concat(this[_data], this[_length])
|
||
|
|
this.emit('collect', result)
|
||
|
|
return super.end(cb)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
module.exports.PassThrough = CollectPassThrough
|