mirror of
https://github.com/advplyr/audiobookshelf.git
synced 2025-10-27 11:18:14 +01:00
861 lines
25 KiB
JavaScript
861 lines
25 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
|
|
//
|
|
// Permission is hereby granted, free of charge, to any person obtaining a
|
|
// copy of this software and associated documentation files (the
|
|
// "Software"), to deal in the Software without restriction, including
|
|
// without limitation the rights to use, copy, modify, merge, publish,
|
|
// distribute, sublicense, and/or sell copies of the Software, and to permit
|
|
// persons to whom the Software is furnished to do so, subject to the
|
|
// following conditions:
|
|
//
|
|
// The above copyright notice and this permission notice shall be included
|
|
// in all copies or substantial portions of the Software.
|
|
//
|
|
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
|
|
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
|
|
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
|
|
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
|
|
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
|
|
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
|
|
// USE OR OTHER DEALINGS IN THE SOFTWARE.
|
|
// A bit simpler than readable streams.
|
|
// Implement an async ._write(chunk, encoding, cb), and it'll handle all
|
|
// the drain event emission and buffering.
|
|
'use strict'
|
|
|
|
const {
|
|
ArrayPrototypeSlice,
|
|
Error,
|
|
FunctionPrototypeSymbolHasInstance,
|
|
ObjectDefineProperty,
|
|
ObjectDefineProperties,
|
|
ObjectSetPrototypeOf,
|
|
StringPrototypeToLowerCase,
|
|
Symbol,
|
|
SymbolHasInstance
|
|
} = require('../../ours/primordials')
|
|
|
|
module.exports = Writable
|
|
Writable.WritableState = WritableState
|
|
|
|
const { EventEmitter: EE } = require('events')
|
|
|
|
const Stream = require('./legacy').Stream
|
|
|
|
const destroyImpl = require('./destroy')
|
|
|
|
const { addAbortSignal } = require('./add-abort-signal')
|
|
|
|
const { getHighWaterMark, getDefaultHighWaterMark } = require('./state')
|
|
|
|
const {
|
|
ERR_INVALID_ARG_TYPE,
|
|
ERR_METHOD_NOT_IMPLEMENTED,
|
|
ERR_MULTIPLE_CALLBACK,
|
|
ERR_STREAM_CANNOT_PIPE,
|
|
ERR_STREAM_DESTROYED,
|
|
ERR_STREAM_ALREADY_FINISHED,
|
|
ERR_STREAM_NULL_VALUES,
|
|
ERR_STREAM_WRITE_AFTER_END,
|
|
ERR_UNKNOWN_ENCODING
|
|
} = require('../../ours/errors').codes
|
|
|
|
const { errorOrDestroy } = destroyImpl
|
|
ObjectSetPrototypeOf(Writable.prototype, Stream.prototype)
|
|
ObjectSetPrototypeOf(Writable, Stream)
|
|
|
|
function nop() {}
|
|
|
|
const kOnFinished = Symbol('kOnFinished')
|
|
|
|
function WritableState(options, stream, isDuplex) {
|
|
// Duplex streams are both readable and writable, but share
|
|
// the same options object.
|
|
// However, some cases require setting options to different
|
|
// values for the readable and the writable sides of the duplex stream,
|
|
// e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
|
|
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof require('./duplex') // Object stream flag to indicate whether or not this stream
|
|
// contains buffers or objects.
|
|
|
|
this.objectMode = !!(options && options.objectMode)
|
|
if (isDuplex) this.objectMode = this.objectMode || !!(options && options.writableObjectMode) // The point at which write() starts returning false
|
|
// Note: 0 is a valid value, means that we always return false if
|
|
// the entire buffer is not flushed immediately on write().
|
|
|
|
this.highWaterMark = options
|
|
? getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex)
|
|
: getDefaultHighWaterMark(false) // if _final has been called.
|
|
|
|
this.finalCalled = false // drain event flag.
|
|
|
|
this.needDrain = false // At the start of calling end()
|
|
|
|
this.ending = false // When end() has been called, and returned.
|
|
|
|
this.ended = false // When 'finish' is emitted.
|
|
|
|
this.finished = false // Has it been destroyed
|
|
|
|
this.destroyed = false // Should we decode strings into buffers before passing to _write?
|
|
// this is here so that some node-core streams can optimize string
|
|
// handling at a lower level.
|
|
|
|
const noDecode = !!(options && options.decodeStrings === false)
|
|
this.decodeStrings = !noDecode // Crypto is kind of old and crusty. Historically, its default string
|
|
// encoding is 'binary' so we have to make this configurable.
|
|
// Everything else in the universe uses 'utf8', though.
|
|
|
|
this.defaultEncoding = (options && options.defaultEncoding) || 'utf8' // Not an actual buffer we keep track of, but a measurement
|
|
// of how much we're waiting to get pushed to some underlying
|
|
// socket or file.
|
|
|
|
this.length = 0 // A flag to see when we're in the middle of a write.
|
|
|
|
this.writing = false // When true all writes will be buffered until .uncork() call.
|
|
|
|
this.corked = 0 // A flag to be able to tell if the onwrite cb is called immediately,
|
|
// or on a later tick. We set this to true at first, because any
|
|
// actions that shouldn't happen until "later" should generally also
|
|
// not happen before the first write call.
|
|
|
|
this.sync = true // A flag to know if we're processing previously buffered items, which
|
|
// may call the _write() callback in the same tick, so that we don't
|
|
// end up in an overlapped onwrite situation.
|
|
|
|
this.bufferProcessing = false // The callback that's passed to _write(chunk, cb).
|
|
|
|
this.onwrite = onwrite.bind(undefined, stream) // The callback that the user supplies to write(chunk, encoding, cb).
|
|
|
|
this.writecb = null // The amount that is being written when _write is called.
|
|
|
|
this.writelen = 0 // Storage for data passed to the afterWrite() callback in case of
|
|
// synchronous _write() completion.
|
|
|
|
this.afterWriteTickInfo = null
|
|
resetBuffer(this) // Number of pending user-supplied write callbacks
|
|
// this must be 0 before 'finish' can be emitted.
|
|
|
|
this.pendingcb = 0 // Stream is still being constructed and cannot be
|
|
// destroyed until construction finished or failed.
|
|
// Async construction is opt in, therefore we start as
|
|
// constructed.
|
|
|
|
this.constructed = true // Emit prefinish if the only thing we're waiting for is _write cbs
|
|
// This is relevant for synchronous Transform streams.
|
|
|
|
this.prefinished = false // True if the error was already emitted and should not be thrown again.
|
|
|
|
this.errorEmitted = false // Should close be emitted on destroy. Defaults to true.
|
|
|
|
this.emitClose = !options || options.emitClose !== false // Should .destroy() be called after 'finish' (and potentially 'end').
|
|
|
|
this.autoDestroy = !options || options.autoDestroy !== false // Indicates whether the stream has errored. When true all write() calls
|
|
// should return false. This is needed since when autoDestroy
|
|
// is disabled we need a way to tell whether the stream has failed.
|
|
|
|
this.errored = null // Indicates whether the stream has finished destroying.
|
|
|
|
this.closed = false // True if close has been emitted or would have been emitted
|
|
// depending on emitClose.
|
|
|
|
this.closeEmitted = false
|
|
this[kOnFinished] = []
|
|
}
|
|
|
|
function resetBuffer(state) {
|
|
state.buffered = []
|
|
state.bufferedIndex = 0
|
|
state.allBuffers = true
|
|
state.allNoop = true
|
|
}
|
|
|
|
WritableState.prototype.getBuffer = function getBuffer() {
|
|
return ArrayPrototypeSlice(this.buffered, this.bufferedIndex)
|
|
}
|
|
|
|
ObjectDefineProperty(WritableState.prototype, 'bufferedRequestCount', {
|
|
get() {
|
|
return this.buffered.length - this.bufferedIndex
|
|
}
|
|
})
|
|
|
|
function Writable(options) {
|
|
// Writable ctor is applied to Duplexes, too.
|
|
// `realHasInstance` is necessary because using plain `instanceof`
|
|
// would return false, as no `_writableState` property is attached.
|
|
// Trying to use the custom `instanceof` for Writable here will also break the
|
|
// Node.js LazyTransform implementation, which has a non-trivial getter for
|
|
// `_writableState` that would lead to infinite recursion.
|
|
// Checking for a Stream.Duplex instance is faster here instead of inside
|
|
// the WritableState constructor, at least with V8 6.5.
|
|
const isDuplex = this instanceof require('./duplex')
|
|
|
|
if (!isDuplex && !FunctionPrototypeSymbolHasInstance(Writable, this)) return new Writable(options)
|
|
this._writableState = new WritableState(options, this, isDuplex)
|
|
|
|
if (options) {
|
|
if (typeof options.write === 'function') this._write = options.write
|
|
if (typeof options.writev === 'function') this._writev = options.writev
|
|
if (typeof options.destroy === 'function') this._destroy = options.destroy
|
|
if (typeof options.final === 'function') this._final = options.final
|
|
if (typeof options.construct === 'function') this._construct = options.construct
|
|
if (options.signal) addAbortSignal(options.signal, this)
|
|
}
|
|
|
|
Stream.call(this, options)
|
|
destroyImpl.construct(this, () => {
|
|
const state = this._writableState
|
|
|
|
if (!state.writing) {
|
|
clearBuffer(this, state)
|
|
}
|
|
|
|
finishMaybe(this, state)
|
|
})
|
|
}
|
|
|
|
ObjectDefineProperty(Writable, SymbolHasInstance, {
|
|
value: function (object) {
|
|
if (FunctionPrototypeSymbolHasInstance(this, object)) return true
|
|
if (this !== Writable) return false
|
|
return object && object._writableState instanceof WritableState
|
|
}
|
|
}) // Otherwise people can pipe Writable streams, which is just wrong.
|
|
|
|
Writable.prototype.pipe = function () {
|
|
errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE())
|
|
}
|
|
|
|
function _write(stream, chunk, encoding, cb) {
|
|
const state = stream._writableState
|
|
|
|
if (typeof encoding === 'function') {
|
|
cb = encoding
|
|
encoding = state.defaultEncoding
|
|
} else {
|
|
if (!encoding) encoding = state.defaultEncoding
|
|
else if (encoding !== 'buffer' && !Buffer.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding)
|
|
if (typeof cb !== 'function') cb = nop
|
|
}
|
|
|
|
if (chunk === null) {
|
|
throw new ERR_STREAM_NULL_VALUES()
|
|
} else if (!state.objectMode) {
|
|
if (typeof chunk === 'string') {
|
|
if (state.decodeStrings !== false) {
|
|
chunk = Buffer.from(chunk, encoding)
|
|
encoding = 'buffer'
|
|
}
|
|
} else if (chunk instanceof Buffer) {
|
|
encoding = 'buffer'
|
|
} else if (Stream._isUint8Array(chunk)) {
|
|
chunk = Stream._uint8ArrayToBuffer(chunk)
|
|
encoding = 'buffer'
|
|
} else {
|
|
throw new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk)
|
|
}
|
|
}
|
|
|
|
let err
|
|
|
|
if (state.ending) {
|
|
err = new ERR_STREAM_WRITE_AFTER_END()
|
|
} else if (state.destroyed) {
|
|
err = new ERR_STREAM_DESTROYED('write')
|
|
}
|
|
|
|
if (err) {
|
|
process.nextTick(cb, err)
|
|
errorOrDestroy(stream, err, true)
|
|
return err
|
|
}
|
|
|
|
state.pendingcb++
|
|
return writeOrBuffer(stream, state, chunk, encoding, cb)
|
|
}
|
|
|
|
Writable.prototype.write = function (chunk, encoding, cb) {
|
|
return _write(this, chunk, encoding, cb) === true
|
|
}
|
|
|
|
Writable.prototype.cork = function () {
|
|
this._writableState.corked++
|
|
}
|
|
|
|
Writable.prototype.uncork = function () {
|
|
const state = this._writableState
|
|
|
|
if (state.corked) {
|
|
state.corked--
|
|
if (!state.writing) clearBuffer(this, state)
|
|
}
|
|
}
|
|
|
|
Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {
|
|
// node::ParseEncoding() requires lower case.
|
|
if (typeof encoding === 'string') encoding = StringPrototypeToLowerCase(encoding)
|
|
if (!Buffer.isEncoding(encoding)) throw new ERR_UNKNOWN_ENCODING(encoding)
|
|
this._writableState.defaultEncoding = encoding
|
|
return this
|
|
} // If we're already writing something, then just put this
|
|
// in the queue, and wait our turn. Otherwise, call _write
|
|
// If we return false, then we need a drain event, so set that flag.
|
|
|
|
function writeOrBuffer(stream, state, chunk, encoding, callback) {
|
|
const len = state.objectMode ? 1 : chunk.length
|
|
state.length += len // stream._write resets state.length
|
|
|
|
const ret = state.length < state.highWaterMark // We must ensure that previous needDrain will not be reset to false.
|
|
|
|
if (!ret) state.needDrain = true
|
|
|
|
if (state.writing || state.corked || state.errored || !state.constructed) {
|
|
state.buffered.push({
|
|
chunk,
|
|
encoding,
|
|
callback
|
|
})
|
|
|
|
if (state.allBuffers && encoding !== 'buffer') {
|
|
state.allBuffers = false
|
|
}
|
|
|
|
if (state.allNoop && callback !== nop) {
|
|
state.allNoop = false
|
|
}
|
|
} else {
|
|
state.writelen = len
|
|
state.writecb = callback
|
|
state.writing = true
|
|
state.sync = true
|
|
|
|
stream._write(chunk, encoding, state.onwrite)
|
|
|
|
state.sync = false
|
|
} // Return false if errored or destroyed in order to break
|
|
// any synchronous while(stream.write(data)) loops.
|
|
|
|
return ret && !state.errored && !state.destroyed
|
|
}
|
|
|
|
function doWrite(stream, state, writev, len, chunk, encoding, cb) {
|
|
state.writelen = len
|
|
state.writecb = cb
|
|
state.writing = true
|
|
state.sync = true
|
|
if (state.destroyed) state.onwrite(new ERR_STREAM_DESTROYED('write'))
|
|
else if (writev) stream._writev(chunk, state.onwrite)
|
|
else stream._write(chunk, encoding, state.onwrite)
|
|
state.sync = false
|
|
}
|
|
|
|
function onwriteError(stream, state, er, cb) {
|
|
--state.pendingcb
|
|
cb(er) // Ensure callbacks are invoked even when autoDestroy is
|
|
// not enabled. Passing `er` here doesn't make sense since
|
|
// it's related to one specific write, not to the buffered
|
|
// writes.
|
|
|
|
errorBuffer(state) // This can emit error, but error must always follow cb.
|
|
|
|
errorOrDestroy(stream, er)
|
|
}
|
|
|
|
function onwrite(stream, er) {
|
|
const state = stream._writableState
|
|
const sync = state.sync
|
|
const cb = state.writecb
|
|
|
|
if (typeof cb !== 'function') {
|
|
errorOrDestroy(stream, new ERR_MULTIPLE_CALLBACK())
|
|
return
|
|
}
|
|
|
|
state.writing = false
|
|
state.writecb = null
|
|
state.length -= state.writelen
|
|
state.writelen = 0
|
|
|
|
if (er) {
|
|
// Avoid V8 leak, https://github.com/nodejs/node/pull/34103#issuecomment-652002364
|
|
er.stack // eslint-disable-line no-unused-expressions
|
|
|
|
if (!state.errored) {
|
|
state.errored = er
|
|
} // In case of duplex streams we need to notify the readable side of the
|
|
// error.
|
|
|
|
if (stream._readableState && !stream._readableState.errored) {
|
|
stream._readableState.errored = er
|
|
}
|
|
|
|
if (sync) {
|
|
process.nextTick(onwriteError, stream, state, er, cb)
|
|
} else {
|
|
onwriteError(stream, state, er, cb)
|
|
}
|
|
} else {
|
|
if (state.buffered.length > state.bufferedIndex) {
|
|
clearBuffer(stream, state)
|
|
}
|
|
|
|
if (sync) {
|
|
// It is a common case that the callback passed to .write() is always
|
|
// the same. In that case, we do not schedule a new nextTick(), but
|
|
// rather just increase a counter, to improve performance and avoid
|
|
// memory allocations.
|
|
if (state.afterWriteTickInfo !== null && state.afterWriteTickInfo.cb === cb) {
|
|
state.afterWriteTickInfo.count++
|
|
} else {
|
|
state.afterWriteTickInfo = {
|
|
count: 1,
|
|
cb,
|
|
stream,
|
|
state
|
|
}
|
|
process.nextTick(afterWriteTick, state.afterWriteTickInfo)
|
|
}
|
|
} else {
|
|
afterWrite(stream, state, 1, cb)
|
|
}
|
|
}
|
|
}
|
|
|
|
function afterWriteTick({ stream, state, count, cb }) {
|
|
state.afterWriteTickInfo = null
|
|
return afterWrite(stream, state, count, cb)
|
|
}
|
|
|
|
function afterWrite(stream, state, count, cb) {
|
|
const needDrain = !state.ending && !stream.destroyed && state.length === 0 && state.needDrain
|
|
|
|
if (needDrain) {
|
|
state.needDrain = false
|
|
stream.emit('drain')
|
|
}
|
|
|
|
while (count-- > 0) {
|
|
state.pendingcb--
|
|
cb()
|
|
}
|
|
|
|
if (state.destroyed) {
|
|
errorBuffer(state)
|
|
}
|
|
|
|
finishMaybe(stream, state)
|
|
} // If there's something in the buffer waiting, then invoke callbacks.
|
|
|
|
function errorBuffer(state) {
|
|
if (state.writing) {
|
|
return
|
|
}
|
|
|
|
for (let n = state.bufferedIndex; n < state.buffered.length; ++n) {
|
|
var _state$errored
|
|
|
|
const { chunk, callback } = state.buffered[n]
|
|
const len = state.objectMode ? 1 : chunk.length
|
|
state.length -= len
|
|
callback(
|
|
(_state$errored = state.errored) !== null && _state$errored !== undefined
|
|
? _state$errored
|
|
: new ERR_STREAM_DESTROYED('write')
|
|
)
|
|
}
|
|
|
|
const onfinishCallbacks = state[kOnFinished].splice(0)
|
|
|
|
for (let i = 0; i < onfinishCallbacks.length; i++) {
|
|
var _state$errored2
|
|
|
|
onfinishCallbacks[i](
|
|
(_state$errored2 = state.errored) !== null && _state$errored2 !== undefined
|
|
? _state$errored2
|
|
: new ERR_STREAM_DESTROYED('end')
|
|
)
|
|
}
|
|
|
|
resetBuffer(state)
|
|
} // If there's something in the buffer waiting, then process it.
|
|
|
|
function clearBuffer(stream, state) {
|
|
if (state.corked || state.bufferProcessing || state.destroyed || !state.constructed) {
|
|
return
|
|
}
|
|
|
|
const { buffered, bufferedIndex, objectMode } = state
|
|
const bufferedLength = buffered.length - bufferedIndex
|
|
|
|
if (!bufferedLength) {
|
|
return
|
|
}
|
|
|
|
let i = bufferedIndex
|
|
state.bufferProcessing = true
|
|
|
|
if (bufferedLength > 1 && stream._writev) {
|
|
state.pendingcb -= bufferedLength - 1
|
|
const callback = state.allNoop
|
|
? nop
|
|
: (err) => {
|
|
for (let n = i; n < buffered.length; ++n) {
|
|
buffered[n].callback(err)
|
|
}
|
|
} // Make a copy of `buffered` if it's going to be used by `callback` above,
|
|
// since `doWrite` will mutate the array.
|
|
|
|
const chunks = state.allNoop && i === 0 ? buffered : ArrayPrototypeSlice(buffered, i)
|
|
chunks.allBuffers = state.allBuffers
|
|
doWrite(stream, state, true, state.length, chunks, '', callback)
|
|
resetBuffer(state)
|
|
} else {
|
|
do {
|
|
const { chunk, encoding, callback } = buffered[i]
|
|
buffered[i++] = null
|
|
const len = objectMode ? 1 : chunk.length
|
|
doWrite(stream, state, false, len, chunk, encoding, callback)
|
|
} while (i < buffered.length && !state.writing)
|
|
|
|
if (i === buffered.length) {
|
|
resetBuffer(state)
|
|
} else if (i > 256) {
|
|
buffered.splice(0, i)
|
|
state.bufferedIndex = 0
|
|
} else {
|
|
state.bufferedIndex = i
|
|
}
|
|
}
|
|
|
|
state.bufferProcessing = false
|
|
}
|
|
|
|
Writable.prototype._write = function (chunk, encoding, cb) {
|
|
if (this._writev) {
|
|
this._writev(
|
|
[
|
|
{
|
|
chunk,
|
|
encoding
|
|
}
|
|
],
|
|
cb
|
|
)
|
|
} else {
|
|
throw new ERR_METHOD_NOT_IMPLEMENTED('_write()')
|
|
}
|
|
}
|
|
|
|
Writable.prototype._writev = null
|
|
|
|
Writable.prototype.end = function (chunk, encoding, cb) {
|
|
const state = this._writableState
|
|
|
|
if (typeof chunk === 'function') {
|
|
cb = chunk
|
|
chunk = null
|
|
encoding = null
|
|
} else if (typeof encoding === 'function') {
|
|
cb = encoding
|
|
encoding = null
|
|
}
|
|
|
|
let err
|
|
|
|
if (chunk !== null && chunk !== undefined) {
|
|
const ret = _write(this, chunk, encoding)
|
|
|
|
if (ret instanceof Error) {
|
|
err = ret
|
|
}
|
|
} // .end() fully uncorks.
|
|
|
|
if (state.corked) {
|
|
state.corked = 1
|
|
this.uncork()
|
|
}
|
|
|
|
if (err) {
|
|
// Do nothing...
|
|
} else if (!state.errored && !state.ending) {
|
|
// This is forgiving in terms of unnecessary calls to end() and can hide
|
|
// logic errors. However, usually such errors are harmless and causing a
|
|
// hard error can be disproportionately destructive. It is not always
|
|
// trivial for the user to determine whether end() needs to be called
|
|
// or not.
|
|
state.ending = true
|
|
finishMaybe(this, state, true)
|
|
state.ended = true
|
|
} else if (state.finished) {
|
|
err = new ERR_STREAM_ALREADY_FINISHED('end')
|
|
} else if (state.destroyed) {
|
|
err = new ERR_STREAM_DESTROYED('end')
|
|
}
|
|
|
|
if (typeof cb === 'function') {
|
|
if (err || state.finished) {
|
|
process.nextTick(cb, err)
|
|
} else {
|
|
state[kOnFinished].push(cb)
|
|
}
|
|
}
|
|
|
|
return this
|
|
}
|
|
|
|
function needFinish(state) {
|
|
return (
|
|
state.ending &&
|
|
!state.destroyed &&
|
|
state.constructed &&
|
|
state.length === 0 &&
|
|
!state.errored &&
|
|
state.buffered.length === 0 &&
|
|
!state.finished &&
|
|
!state.writing &&
|
|
!state.errorEmitted &&
|
|
!state.closeEmitted
|
|
)
|
|
}
|
|
|
|
function callFinal(stream, state) {
|
|
let called = false
|
|
|
|
function onFinish(err) {
|
|
if (called) {
|
|
errorOrDestroy(stream, err !== null && err !== undefined ? err : ERR_MULTIPLE_CALLBACK())
|
|
return
|
|
}
|
|
|
|
called = true
|
|
state.pendingcb--
|
|
|
|
if (err) {
|
|
const onfinishCallbacks = state[kOnFinished].splice(0)
|
|
|
|
for (let i = 0; i < onfinishCallbacks.length; i++) {
|
|
onfinishCallbacks[i](err)
|
|
}
|
|
|
|
errorOrDestroy(stream, err, state.sync)
|
|
} else if (needFinish(state)) {
|
|
state.prefinished = true
|
|
stream.emit('prefinish') // Backwards compat. Don't check state.sync here.
|
|
// Some streams assume 'finish' will be emitted
|
|
// asynchronously relative to _final callback.
|
|
|
|
state.pendingcb++
|
|
process.nextTick(finish, stream, state)
|
|
}
|
|
}
|
|
|
|
state.sync = true
|
|
state.pendingcb++
|
|
|
|
try {
|
|
stream._final(onFinish)
|
|
} catch (err) {
|
|
onFinish(err)
|
|
}
|
|
|
|
state.sync = false
|
|
}
|
|
|
|
function prefinish(stream, state) {
|
|
if (!state.prefinished && !state.finalCalled) {
|
|
if (typeof stream._final === 'function' && !state.destroyed) {
|
|
state.finalCalled = true
|
|
callFinal(stream, state)
|
|
} else {
|
|
state.prefinished = true
|
|
stream.emit('prefinish')
|
|
}
|
|
}
|
|
}
|
|
|
|
function finishMaybe(stream, state, sync) {
|
|
if (needFinish(state)) {
|
|
prefinish(stream, state)
|
|
|
|
if (state.pendingcb === 0) {
|
|
if (sync) {
|
|
state.pendingcb++
|
|
process.nextTick(
|
|
(stream, state) => {
|
|
if (needFinish(state)) {
|
|
finish(stream, state)
|
|
} else {
|
|
state.pendingcb--
|
|
}
|
|
},
|
|
stream,
|
|
state
|
|
)
|
|
} else if (needFinish(state)) {
|
|
state.pendingcb++
|
|
finish(stream, state)
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
function finish(stream, state) {
|
|
state.pendingcb--
|
|
state.finished = true
|
|
const onfinishCallbacks = state[kOnFinished].splice(0)
|
|
|
|
for (let i = 0; i < onfinishCallbacks.length; i++) {
|
|
onfinishCallbacks[i]()
|
|
}
|
|
|
|
stream.emit('finish')
|
|
|
|
if (state.autoDestroy) {
|
|
// In case of duplex streams we need a way to detect
|
|
// if the readable side is ready for autoDestroy as well.
|
|
const rState = stream._readableState
|
|
const autoDestroy =
|
|
!rState ||
|
|
(rState.autoDestroy && // We don't expect the readable to ever 'end'
|
|
// if readable is explicitly set to false.
|
|
(rState.endEmitted || rState.readable === false))
|
|
|
|
if (autoDestroy) {
|
|
stream.destroy()
|
|
}
|
|
}
|
|
}
|
|
|
|
ObjectDefineProperties(Writable.prototype, {
|
|
closed: {
|
|
get() {
|
|
return this._writableState ? this._writableState.closed : false
|
|
}
|
|
},
|
|
destroyed: {
|
|
get() {
|
|
return this._writableState ? this._writableState.destroyed : false
|
|
},
|
|
|
|
set(value) {
|
|
// Backward compatibility, the user is explicitly managing destroyed.
|
|
if (this._writableState) {
|
|
this._writableState.destroyed = value
|
|
}
|
|
}
|
|
},
|
|
writable: {
|
|
get() {
|
|
const w = this._writableState // w.writable === false means that this is part of a Duplex stream
|
|
// where the writable side was disabled upon construction.
|
|
// Compat. The user might manually disable writable side through
|
|
// deprecated setter.
|
|
|
|
return !!w && w.writable !== false && !w.destroyed && !w.errored && !w.ending && !w.ended
|
|
},
|
|
|
|
set(val) {
|
|
// Backwards compatible.
|
|
if (this._writableState) {
|
|
this._writableState.writable = !!val
|
|
}
|
|
}
|
|
},
|
|
writableFinished: {
|
|
get() {
|
|
return this._writableState ? this._writableState.finished : false
|
|
}
|
|
},
|
|
writableObjectMode: {
|
|
get() {
|
|
return this._writableState ? this._writableState.objectMode : false
|
|
}
|
|
},
|
|
writableBuffer: {
|
|
get() {
|
|
return this._writableState && this._writableState.getBuffer()
|
|
}
|
|
},
|
|
writableEnded: {
|
|
get() {
|
|
return this._writableState ? this._writableState.ending : false
|
|
}
|
|
},
|
|
writableNeedDrain: {
|
|
get() {
|
|
const wState = this._writableState
|
|
if (!wState) return false
|
|
return !wState.destroyed && !wState.ending && wState.needDrain
|
|
}
|
|
},
|
|
writableHighWaterMark: {
|
|
get() {
|
|
return this._writableState && this._writableState.highWaterMark
|
|
}
|
|
},
|
|
writableCorked: {
|
|
get() {
|
|
return this._writableState ? this._writableState.corked : 0
|
|
}
|
|
},
|
|
writableLength: {
|
|
get() {
|
|
return this._writableState && this._writableState.length
|
|
}
|
|
},
|
|
errored: {
|
|
enumerable: false,
|
|
|
|
get() {
|
|
return this._writableState ? this._writableState.errored : null
|
|
}
|
|
},
|
|
writableAborted: {
|
|
enumerable: false,
|
|
get: function () {
|
|
return !!(
|
|
this._writableState.writable !== false &&
|
|
(this._writableState.destroyed || this._writableState.errored) &&
|
|
!this._writableState.finished
|
|
)
|
|
}
|
|
}
|
|
})
|
|
const destroy = destroyImpl.destroy
|
|
|
|
Writable.prototype.destroy = function (err, cb) {
|
|
const state = this._writableState // Invoke pending callbacks.
|
|
|
|
if (!state.destroyed && (state.bufferedIndex < state.buffered.length || state[kOnFinished].length)) {
|
|
process.nextTick(errorBuffer, state)
|
|
}
|
|
|
|
destroy.call(this, err, cb)
|
|
return this
|
|
}
|
|
|
|
Writable.prototype._undestroy = destroyImpl.undestroy
|
|
|
|
Writable.prototype._destroy = function (err, cb) {
|
|
cb(err)
|
|
}
|
|
|
|
Writable.prototype[EE.captureRejectionSymbol] = function (err) {
|
|
this.destroy(err)
|
|
}
|
|
|
|
let webStreamsAdapters // Lazy to avoid circular references
|
|
|
|
function lazyWebStreams() {
|
|
if (webStreamsAdapters === undefined) webStreamsAdapters = {}
|
|
return webStreamsAdapters
|
|
}
|
|
|
|
Writable.fromWeb = function (writableStream, options) {
|
|
return lazyWebStreams().newStreamWritableFromWritableStream(writableStream, options)
|
|
}
|
|
|
|
Writable.toWeb = function (streamWritable) {
|
|
return lazyWebStreams().newWritableStreamFromStreamWritable(streamWritable)
|
|
}
|