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readable-stream

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Comparing version 3.6.0 to 3.6.1

53

lib/_stream_duplex.js

@@ -21,2 +21,3 @@ // Copyright Joyent, Inc. and other Node contributors.

// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a duplex stream is just a stream that is both readable and writable.

@@ -26,12 +27,9 @@ // Since JS doesn't have multiple prototypal inheritance, this class

// Writable.
'use strict';
/*<replacement>*/
var objectKeys = Object.keys || function (obj) {
var keys = [];
for (var key in obj) {
keys.push(key);
}
for (var key in obj) keys.push(key);
return keys;

@@ -41,21 +39,14 @@ };

module.exports = Duplex;
var Readable = require('./_stream_readable');
var Writable = require('./_stream_writable');
const Readable = require('./_stream_readable');
const Writable = require('./_stream_writable');
require('inherits')(Duplex, Readable);
{
// Allow the keys array to be GC'ed.
var keys = objectKeys(Writable.prototype);
const keys = objectKeys(Writable.prototype);
for (var v = 0; v < keys.length; v++) {
var method = keys[v];
const method = keys[v];
if (!Duplex.prototype[method]) Duplex.prototype[method] = Writable.prototype[method];
}
}
function Duplex(options) {

@@ -66,7 +57,5 @@ if (!(this instanceof Duplex)) return new Duplex(options);

this.allowHalfOpen = true;
if (options) {
if (options.readable === false) this.readable = false;
if (options.writable === false) this.writable = false;
if (options.allowHalfOpen === false) {

@@ -78,3 +67,2 @@ this.allowHalfOpen = false;

}
Object.defineProperty(Duplex.prototype, 'writableHighWaterMark', {

@@ -85,3 +73,3 @@ // making it explicit this property is not enumerable

enumerable: false,
get: function get() {
get() {
return this._writableState.highWaterMark;

@@ -104,19 +92,19 @@ }

enumerable: false,
get: function get() {
get() {
return this._writableState.length;
}
}); // the no-half-open enforcer
});
// the no-half-open enforcer
function onend() {
// If the writable side ended, then we're ok.
if (this._writableState.ended) return; // no more data can be written.
if (this._writableState.ended) return;
// no more data can be written.
// But allow more writes to happen in this tick.
process.nextTick(onEndNT, this);
}
function onEndNT(self) {
self.end();
}
Object.defineProperty(Duplex.prototype, 'destroyed', {

@@ -127,10 +115,9 @@ // making it explicit this property is not enumerable

enumerable: false,
get: function get() {
get() {
if (this._readableState === undefined || this._writableState === undefined) {
return false;
}
return this._readableState.destroyed && this._writableState.destroyed;
},
set: function set(value) {
set(value) {
// we ignore the value if the stream

@@ -140,6 +127,6 @@ // has not been initialized yet

return;
} // backward compatibility, the user is explicitly
}
// backward compatibility, the user is explicitly
// managing destroyed
this._readableState.destroyed = value;

@@ -146,0 +133,0 @@ this._writableState.destroyed = value;

8

lib/_stream_passthrough.js

@@ -21,13 +21,12 @@ // Copyright Joyent, Inc. and other Node contributors.

// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a passthrough stream.
// basically just the most minimal sort of Transform stream.
// Every written chunk gets output as-is.
'use strict';
module.exports = PassThrough;
var Transform = require('./_stream_transform');
const Transform = require('./_stream_transform');
require('inherits')(PassThrough, Transform);
function PassThrough(options) {

@@ -37,5 +36,4 @@ if (!(this instanceof PassThrough)) return new PassThrough(options);

}
PassThrough.prototype._transform = function (chunk, encoding, cb) {
cb(null, chunk);
};

520

lib/_stream_readable.js

@@ -21,7 +21,8 @@ // Copyright Joyent, Inc. and other Node contributors.

// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
module.exports = Readable;
/*<replacement>*/
var Duplex;

@@ -31,6 +32,5 @@ /*</replacement>*/

Readable.ReadableState = ReadableState;
/*<replacement>*/
var EE = require('events').EventEmitter;
const EE = require('events').EventEmitter;
var EElistenerCount = function EElistenerCount(emitter, type) {

@@ -42,26 +42,17 @@ return emitter.listeners(type).length;

/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/
var Buffer = require('buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
const Buffer = require('buffer').Buffer;
const OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
return Buffer.from(chunk);
}
function _isUint8Array(obj) {
return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
/*<replacement>*/
var debugUtil = require('util');
var debug;
const debugUtil = require('util');
let debug;
if (debugUtil && debugUtil.debuglog) {

@@ -74,40 +65,35 @@ debug = debugUtil.debuglog('stream');

const BufferList = require('./internal/streams/buffer_list');
const destroyImpl = require('./internal/streams/destroy');
const _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
const _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT;
var BufferList = require('./internal/streams/buffer_list');
var destroyImpl = require('./internal/streams/destroy');
var _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
var _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_STREAM_PUSH_AFTER_EOF = _require$codes.ERR_STREAM_PUSH_AFTER_EOF,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_STREAM_UNSHIFT_AFTER_END_EVENT = _require$codes.ERR_STREAM_UNSHIFT_AFTER_END_EVENT; // Lazy loaded to improve the startup performance.
var StringDecoder;
var createReadableStreamAsyncIterator;
var from;
// Lazy loaded to improve the startup performance.
let StringDecoder;
let createReadableStreamAsyncIterator;
let from;
require('inherits')(Readable, Stream);
var errorOrDestroy = destroyImpl.errorOrDestroy;
var kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
const errorOrDestroy = destroyImpl.errorOrDestroy;
const kProxyEvents = ['error', 'close', 'destroy', 'pause', 'resume'];
function prependListener(emitter, event, fn) {
// Sadly this is not cacheable as some libraries bundle their own
// event emitter implementation with them.
if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn); // This is a hack to make sure that our error handler is attached before any
if (typeof emitter.prependListener === 'function') return emitter.prependListener(event, fn);
// This is a hack to make sure that our error handler is attached before any
// userland ones. NEVER DO THIS. This is here only because this code needs
// to continue to work with older versions of Node.js that do not include
// the prependListener() method. The goal is to eventually remove this hack.
if (!emitter._events || !emitter._events[event]) emitter.on(event, fn);else if (Array.isArray(emitter._events[event])) emitter._events[event].unshift(fn);else emitter._events[event] = [fn, emitter._events[event]];
}
function ReadableState(options, stream, isDuplex) {
Duplex = Duplex || require('./_stream_duplex');
options = options || {}; // Duplex streams are both readable and writable, but share
options = options || {};
// Duplex streams are both readable and writable, but share
// the same options object.

@@ -117,14 +103,16 @@ // However, some cases require setting options to different

// These options can be provided separately as readableXXX and writableXXX.
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag. Used to make read(n) ignore n and to
// object stream flag. Used to make read(n) ignore n and to
// make all the buffer merging and length checks go away
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode;
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.readableObjectMode; // the point at which it stops calling _read() to fill the buffer
// the point at which it stops calling _read() to fill the buffer
// Note: 0 is a valid value, means "don't call _read preemptively ever"
this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex);
this.highWaterMark = getHighWaterMark(this, options, 'readableHighWaterMark', isDuplex); // A linked list is used to store data chunks instead of an array because the
// A linked list is used to store data chunks instead of an array because the
// linked list can remove elements from the beginning faster than
// array.shift()
this.buffer = new BufferList();

@@ -137,10 +125,12 @@ this.length = 0;

this.endEmitted = false;
this.reading = false; // a flag to be able to tell if the event 'readable'/'data' is emitted
this.reading = false;
// a flag to be able to tell if the event 'readable'/'data' is emitted
// 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 read call.
this.sync = true;
this.sync = true; // whenever we return null, then we set a flag to say
// whenever we return null, then we set a flag to say
// that we're awaiting a 'readable' event emission.
this.needReadable = false;

@@ -150,20 +140,25 @@ this.emittedReadable = false;

this.resumeScheduled = false;
this.paused = true; // Should close be emitted on destroy. Defaults to true.
this.paused = true;
this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'end' (and potentially 'finish')
// Should close be emitted on destroy. Defaults to true.
this.emitClose = options.emitClose !== false;
this.autoDestroy = !!options.autoDestroy; // has it been destroyed
// Should .destroy() be called after 'end' (and potentially 'finish')
this.autoDestroy = !!options.autoDestroy;
this.destroyed = false; // Crypto is kind of old and crusty. Historically, its default string
// has it been destroyed
this.destroyed = false;
// 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.defaultEncoding || 'utf8';
this.defaultEncoding = options.defaultEncoding || 'utf8'; // the number of writers that are awaiting a drain event in .pipe()s
// the number of writers that are awaiting a drain event in .pipe()s
this.awaitDrain = 0;
this.awaitDrain = 0; // if true, a maybeReadMore has been scheduled
// if true, a maybeReadMore has been scheduled
this.readingMore = false;
this.decoder = null;
this.encoding = null;
if (options.encoding) {

@@ -175,13 +170,13 @@ if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;

}
function Readable(options) {
Duplex = Duplex || require('./_stream_duplex');
if (!(this instanceof Readable)) return new Readable(options); // Checking for a Stream.Duplex instance is faster here instead of inside
if (!(this instanceof Readable)) return new Readable(options);
// Checking for a Stream.Duplex instance is faster here instead of inside
// the ReadableState constructor, at least with V8 6.5
const isDuplex = this instanceof Duplex;
this._readableState = new ReadableState(options, this, isDuplex);
var isDuplex = this instanceof Duplex;
this._readableState = new ReadableState(options, this, isDuplex); // legacy
// legacy
this.readable = true;
if (options) {

@@ -191,6 +186,4 @@ if (typeof options.read === 'function') this._read = options.read;

}
Stream.call(this);
}
Object.defineProperty(Readable.prototype, 'destroyed', {

@@ -201,10 +194,9 @@ // making it explicit this property is not enumerable

enumerable: false,
get: function get() {
get() {
if (this._readableState === undefined) {
return false;
}
return this._readableState.destroyed;
},
set: function set(value) {
set(value) {
// we ignore the value if the stream

@@ -214,6 +206,6 @@ // has not been initialized yet

return;
} // backward compatibility, the user is explicitly
}
// backward compatibility, the user is explicitly
// managing destroyed
this._readableState.destroyed = value;

@@ -224,19 +216,16 @@ }

Readable.prototype._undestroy = destroyImpl.undestroy;
Readable.prototype._destroy = function (err, cb) {
cb(err);
}; // Manually shove something into the read() buffer.
};
// Manually shove something into the read() buffer.
// This returns true if the highWaterMark has not been hit yet,
// similar to how Writable.write() returns true if you should
// write() some more.
Readable.prototype.push = function (chunk, encoding) {
var state = this._readableState;
var skipChunkCheck;
if (!state.objectMode) {
if (typeof chunk === 'string') {
encoding = encoding || state.defaultEncoding;
if (encoding !== state.encoding) {

@@ -246,3 +235,2 @@ chunk = Buffer.from(chunk, encoding);

}
skipChunkCheck = true;

@@ -253,15 +241,12 @@ }

}
return readableAddChunk(this, chunk, encoding, false, skipChunkCheck);
}; // Unshift should *always* be something directly out of read()
};
// Unshift should *always* be something directly out of read()
Readable.prototype.unshift = function (chunk) {
return readableAddChunk(this, chunk, null, true, false);
};
function readableAddChunk(stream, chunk, encoding, addToFront, skipChunkCheck) {
debug('readableAddChunk', chunk);
var state = stream._readableState;
if (chunk === null) {

@@ -273,3 +258,2 @@ state.reading = false;

if (!skipChunkCheck) er = chunkInvalid(state, chunk);
if (er) {

@@ -281,3 +265,2 @@ errorOrDestroy(stream, er);

}
if (addToFront) {

@@ -291,3 +274,2 @@ if (state.endEmitted) errorOrDestroy(stream, new ERR_STREAM_UNSHIFT_AFTER_END_EVENT());else addChunk(stream, state, chunk, true);

state.reading = false;
if (state.decoder && !encoding) {

@@ -304,10 +286,9 @@ chunk = state.decoder.write(chunk);

}
} // We can push more data if we are below the highWaterMark.
}
// We can push more data if we are below the highWaterMark.
// Also, if we have no data yet, we can stand some more bytes.
// This is to work around cases where hwm=0, such as the repl.
return !state.ended && (state.length < state.highWaterMark || state.length === 0);
}
function addChunk(stream, state, chunk, addToFront) {

@@ -323,31 +304,26 @@ if (state.flowing && state.length === 0 && !state.sync) {

}
maybeReadMore(stream, state);
}
function chunkInvalid(state, chunk) {
var er;
if (!_isUint8Array(chunk) && typeof chunk !== 'string' && chunk !== undefined && !state.objectMode) {
er = new ERR_INVALID_ARG_TYPE('chunk', ['string', 'Buffer', 'Uint8Array'], chunk);
}
return er;
}
Readable.prototype.isPaused = function () {
return this._readableState.flowing === false;
}; // backwards compatibility.
};
// backwards compatibility.
Readable.prototype.setEncoding = function (enc) {
if (!StringDecoder) StringDecoder = require('string_decoder/').StringDecoder;
var decoder = new StringDecoder(enc);
this._readableState.decoder = decoder; // If setEncoding(null), decoder.encoding equals utf8
const decoder = new StringDecoder(enc);
this._readableState.decoder = decoder;
// If setEncoding(null), decoder.encoding equals utf8
this._readableState.encoding = this._readableState.decoder.encoding;
this._readableState.encoding = this._readableState.decoder.encoding; // Iterate over current buffer to convert already stored Buffers:
var p = this._readableState.buffer.head;
var content = '';
// Iterate over current buffer to convert already stored Buffers:
let p = this._readableState.buffer.head;
let content = '';
while (p !== null) {

@@ -357,13 +333,10 @@ content += decoder.write(p.data);

}
this._readableState.buffer.clear();
if (content !== '') this._readableState.buffer.push(content);
this._readableState.length = content.length;
return this;
}; // Don't raise the hwm > 1GB
};
var MAX_HWM = 0x40000000;
// Don't raise the hwm > 1GB
const MAX_HWM = 0x40000000;
function computeNewHighWaterMark(n) {

@@ -384,21 +357,18 @@ if (n >= MAX_HWM) {

}
return n;
}
return n;
} // This function is designed to be inlinable, so please take care when making
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function howMuchToRead(n, state) {
if (n <= 0 || state.length === 0 && state.ended) return 0;
if (state.objectMode) return 1;
if (n !== n) {
// Only flow one buffer at a time
if (state.flowing && state.length) return state.buffer.head.data.length;else return state.length;
} // If we're asking for more than the current hwm, then raise the hwm.
}
// If we're asking for more than the current hwm, then raise the hwm.
if (n > state.highWaterMark) state.highWaterMark = computeNewHighWaterMark(n);
if (n <= state.length) return n; // Don't have enough
if (n <= state.length) return n;
// Don't have enough
if (!state.ended) {

@@ -408,7 +378,6 @@ state.needReadable = true;

}
return state.length;
} // you can override either this method, or the async _read(n) below.
}
// you can override either this method, or the async _read(n) below.
Readable.prototype.read = function (n) {

@@ -419,6 +388,7 @@ debug('read', n);

var nOrig = n;
if (n !== 0) state.emittedReadable = false; // if we're doing read(0) to trigger a readable event, but we
if (n !== 0) state.emittedReadable = false;
// if we're doing read(0) to trigger a readable event, but we
// already have a bunch of data in the buffer, then just trigger
// the 'readable' event and move on.
if (n === 0 && state.needReadable && ((state.highWaterMark !== 0 ? state.length >= state.highWaterMark : state.length > 0) || state.ended)) {

@@ -429,9 +399,11 @@ debug('read: emitReadable', state.length, state.ended);

}
n = howMuchToRead(n, state);
n = howMuchToRead(n, state); // if we've ended, and we're now clear, then finish it up.
// if we've ended, and we're now clear, then finish it up.
if (n === 0 && state.ended) {
if (state.length === 0) endReadable(this);
return null;
} // All the actual chunk generation logic needs to be
}
// All the actual chunk generation logic needs to be
// *below* the call to _read. The reason is that in certain

@@ -457,15 +429,15 @@ // synthetic stream cases, such as passthrough streams, _read

// 3. Actually pull the requested chunks out of the buffer and return.
// if we need a readable event, then we need to do some reading.
var doRead = state.needReadable;
debug('need readable', doRead); // if we currently have less than the highWaterMark, then also read some
debug('need readable', doRead);
// if we currently have less than the highWaterMark, then also read some
if (state.length === 0 || state.length - n < state.highWaterMark) {
doRead = true;
debug('length less than watermark', doRead);
} // however, if we've ended, then there's no point, and if we're already
}
// however, if we've ended, then there's no point, and if we're already
// reading, then it's unnecessary.
if (state.ended || state.reading) {

@@ -477,17 +449,14 @@ doRead = false;

state.reading = true;
state.sync = true; // if the length is currently zero, then we *need* a readable event.
if (state.length === 0) state.needReadable = true; // call internal read method
state.sync = true;
// if the length is currently zero, then we *need* a readable event.
if (state.length === 0) state.needReadable = true;
// call internal read method
this._read(state.highWaterMark);
state.sync = false; // If _read pushed data synchronously, then `reading` will be false,
state.sync = false;
// If _read pushed data synchronously, then `reading` will be false,
// and we need to re-evaluate how much data we can return to the user.
if (!state.reading) n = howMuchToRead(nOrig, state);
}
var ret;
if (n > 0) ret = fromList(n, state);else ret = null;
if (ret === null) {

@@ -500,22 +469,18 @@ state.needReadable = state.length <= state.highWaterMark;

}
if (state.length === 0) {
// If we have nothing in the buffer, then we want to know
// as soon as we *do* get something into the buffer.
if (!state.ended) state.needReadable = true; // If we tried to read() past the EOF, then emit end on the next tick.
if (!state.ended) state.needReadable = true;
// If we tried to read() past the EOF, then emit end on the next tick.
if (nOrig !== n && state.ended) endReadable(this);
}
if (ret !== null) this.emit('data', ret);
return ret;
};
function onEofChunk(stream, state) {
debug('onEofChunk');
if (state.ended) return;
if (state.decoder) {
var chunk = state.decoder.end();
if (chunk && chunk.length) {

@@ -526,5 +491,3 @@ state.buffer.push(chunk);

}
state.ended = true;
if (state.sync) {

@@ -538,3 +501,2 @@ // if we are sync, wait until next tick to emit the data.

state.needReadable = false;
if (!state.emittedReadable) {

@@ -545,7 +507,7 @@ state.emittedReadable = true;

}
} // Don't emit readable right away in sync mode, because this can trigger
}
// Don't emit readable right away in sync mode, because this can trigger
// another read() call => stack overflow. This way, it might trigger
// a nextTick recursion warning, but that's not so bad.
function emitReadable(stream) {

@@ -555,3 +517,2 @@ var state = stream._readableState;

state.needReadable = false;
if (!state.emittedReadable) {

@@ -563,11 +524,11 @@ debug('emitReadable', state.flowing);

}
function emitReadable_(stream) {
var state = stream._readableState;
debug('emitReadable_', state.destroyed, state.length, state.ended);
if (!state.destroyed && (state.length || state.ended)) {
stream.emit('readable');
state.emittedReadable = false;
} // The stream needs another readable event if
}
// The stream needs another readable event if
// 1. It is not flowing, as the flow mechanism will take

@@ -578,7 +539,7 @@ // care of it.

// another readable later.
state.needReadable = !state.flowing && !state.ended && state.length <= state.highWaterMark;
flow(stream);
} // at this point, the user has presumably seen the 'readable' event,
}
// at this point, the user has presumably seen the 'readable' event,
// and called read() to consume some data. that may have triggered

@@ -589,4 +550,2 @@ // in turn another _read(n) call, in which case reading = true if

// then go ahead and try to read some more preemptively.
function maybeReadMore(stream, state) {

@@ -598,3 +557,2 @@ if (!state.readingMore) {

}
function maybeReadMore_(stream, state) {

@@ -625,24 +583,22 @@ // Attempt to read more data if we should.

while (!state.reading && !state.ended && (state.length < state.highWaterMark || state.flowing && state.length === 0)) {
var len = state.length;
const len = state.length;
debug('maybeReadMore read 0');
stream.read(0);
if (len === state.length) // didn't get any data, stop spinning.
if (len === state.length)
// didn't get any data, stop spinning.
break;
}
state.readingMore = false;
}
state.readingMore = false;
} // abstract method. to be overridden in specific implementation classes.
// abstract method. to be overridden in specific implementation classes.
// call cb(er, data) where data is <= n in length.
// for virtual (non-string, non-buffer) streams, "length" is somewhat
// arbitrary, and perhaps not very meaningful.
Readable.prototype._read = function (n) {
errorOrDestroy(this, new ERR_METHOD_NOT_IMPLEMENTED('_read()'));
};
Readable.prototype.pipe = function (dest, pipeOpts) {
var src = this;
var state = this._readableState;
switch (state.pipesCount) {

@@ -652,7 +608,5 @@ case 0:

break;
case 1:
state.pipes = [state.pipes, dest];
break;
default:

@@ -662,3 +616,2 @@ state.pipes.push(dest);

}
state.pipesCount += 1;

@@ -670,6 +623,4 @@ debug('pipe count=%d opts=%j', state.pipesCount, pipeOpts);

dest.on('unpipe', onunpipe);
function onunpipe(readable, unpipeInfo) {
debug('onunpipe');
if (readable === src) {

@@ -682,19 +633,17 @@ if (unpipeInfo && unpipeInfo.hasUnpiped === false) {

}
function onend() {
debug('onend');
dest.end();
} // when the dest drains, it reduces the awaitDrain counter
}
// when the dest drains, it reduces the awaitDrain counter
// on the source. This would be more elegant with a .once()
// handler in flow(), but adding and removing repeatedly is
// too slow.
var ondrain = pipeOnDrain(src);
dest.on('drain', ondrain);
var cleanedUp = false;
function cleanup() {
debug('cleanup'); // cleanup event handlers once the pipe is broken
debug('cleanup');
// cleanup event handlers once the pipe is broken
dest.removeListener('close', onclose);

@@ -708,3 +657,5 @@ dest.removeListener('finish', onfinish);

src.removeListener('data', ondata);
cleanedUp = true; // if the reader is waiting for a drain event from this
cleanedUp = true;
// if the reader is waiting for a drain event from this
// specific writer, then it would cause it to never start

@@ -714,8 +665,5 @@ // flowing again.

// If we don't know, then assume that we are waiting for one.
if (state.awaitDrain && (!dest._writableState || dest._writableState.needDrain)) ondrain();
}
src.on('data', ondata);
function ondata(chunk) {

@@ -725,3 +673,2 @@ debug('ondata');

debug('dest.write', ret);
if (ret === false) {

@@ -736,9 +683,8 @@ // If the user unpiped during `dest.write()`, it is possible

}
src.pause();
}
} // if the dest has an error, then stop piping into it.
}
// if the dest has an error, then stop piping into it.
// however, don't suppress the throwing behavior for this.
function onerror(er) {

@@ -749,7 +695,8 @@ debug('onerror', er);

if (EElistenerCount(dest, 'error') === 0) errorOrDestroy(dest, er);
} // Make sure our error handler is attached before userland ones.
}
// Make sure our error handler is attached before userland ones.
prependListener(dest, 'error', onerror);
prependListener(dest, 'error', onerror); // Both close and finish should trigger unpipe, but only once.
// Both close and finish should trigger unpipe, but only once.
function onclose() {

@@ -759,5 +706,3 @@ dest.removeListener('finish', onfinish);

}
dest.once('close', onclose);
function onfinish() {

@@ -768,13 +713,12 @@ debug('onfinish');

}
dest.once('finish', onfinish);
function unpipe() {
debug('unpipe');
src.unpipe(dest);
} // tell the dest that it's being piped to
}
// tell the dest that it's being piped to
dest.emit('pipe', src);
dest.emit('pipe', src); // start the flow if it hasn't been started already.
// start the flow if it hasn't been started already.
if (!state.flowing) {

@@ -784,6 +728,4 @@ debug('pipe resume');

}
return dest;
};
function pipeOnDrain(src) {

@@ -794,3 +736,2 @@ return function pipeOnDrainFunctionResult() {

if (state.awaitDrain) state.awaitDrain--;
if (state.awaitDrain === 0 && EElistenerCount(src, 'data')) {

@@ -802,3 +743,2 @@ state.flowing = true;

}
Readable.prototype.unpipe = function (dest) {

@@ -808,11 +748,14 @@ var state = this._readableState;

hasUnpiped: false
}; // if we're not piping anywhere, then do nothing.
};
if (state.pipesCount === 0) return this; // just one destination. most common case.
// if we're not piping anywhere, then do nothing.
if (state.pipesCount === 0) return this;
// just one destination. most common case.
if (state.pipesCount === 1) {
// passed in one, but it's not the right one.
if (dest && dest !== state.pipes) return this;
if (!dest) dest = state.pipes; // got a match.
if (!dest) dest = state.pipes;
// got a match.
state.pipes = null;

@@ -823,4 +766,5 @@ state.pipesCount = 0;

return this;
} // slow case. multiple pipe destinations.
}
// slow case. multiple pipe destinations.

@@ -834,13 +778,9 @@ if (!dest) {

state.flowing = false;
for (var i = 0; i < len; i++) {
dests[i].emit('unpipe', this, {
hasUnpiped: false
});
}
for (var i = 0; i < len; i++) dests[i].emit('unpipe', this, {
hasUnpiped: false
});
return this;
} // try to find the right one.
}
// try to find the right one.
var index = indexOf(state.pipes, dest);

@@ -853,15 +793,15 @@ if (index === -1) return this;

return this;
}; // set up data events if they are asked for
};
// set up data events if they are asked for
// Ensure readable listeners eventually get something
Readable.prototype.on = function (ev, fn) {
var res = Stream.prototype.on.call(this, ev, fn);
var state = this._readableState;
const res = Stream.prototype.on.call(this, ev, fn);
const state = this._readableState;
if (ev === 'data') {
// update readableListening so that resume() may be a no-op
// a few lines down. This is needed to support once('readable').
state.readableListening = this.listenerCount('readable') > 0; // Try start flowing on next tick if stream isn't explicitly paused
state.readableListening = this.listenerCount('readable') > 0;
// Try start flowing on next tick if stream isn't explicitly paused
if (state.flowing !== false) this.resume();

@@ -874,3 +814,2 @@ } else if (ev === 'readable') {

debug('on readable', state.length, state.reading);
if (state.length) {

@@ -883,11 +822,7 @@ emitReadable(this);

}
return res;
};
Readable.prototype.addListener = Readable.prototype.on;
Readable.prototype.removeListener = function (ev, fn) {
var res = Stream.prototype.removeListener.call(this, ev, fn);
const res = Stream.prototype.removeListener.call(this, ev, fn);
if (ev === 'readable') {

@@ -902,9 +837,6 @@ // We need to check if there is someone still listening to

}
return res;
};
Readable.prototype.removeAllListeners = function (ev) {
var res = Stream.prototype.removeAllListeners.apply(this, arguments);
const res = Stream.prototype.removeAllListeners.apply(this, arguments);
if (ev === 'readable' || ev === undefined) {

@@ -919,14 +851,13 @@ // We need to check if there is someone still listening to

}
return res;
};
function updateReadableListening(self) {
var state = self._readableState;
const state = self._readableState;
state.readableListening = self.listenerCount('readable') > 0;
if (state.resumeScheduled && !state.paused) {
// flowing needs to be set to true now, otherwise
// the upcoming resume will not flow.
state.flowing = true; // crude way to check if we should resume
state.flowing = true;
// crude way to check if we should resume
} else if (self.listenerCount('data') > 0) {

@@ -936,26 +867,22 @@ self.resume();

}
function nReadingNextTick(self) {
debug('readable nexttick read 0');
self.read(0);
} // pause() and resume() are remnants of the legacy readable stream API
}
// pause() and resume() are remnants of the legacy readable stream API
// If the user uses them, then switch into old mode.
Readable.prototype.resume = function () {
var state = this._readableState;
if (!state.flowing) {
debug('resume'); // we flow only if there is no one listening
debug('resume');
// we flow only if there is no one listening
// for readable, but we still have to call
// resume()
state.flowing = !state.readableListening;
resume(this, state);
}
state.paused = false;
return this;
};
function resume(stream, state) {

@@ -967,10 +894,7 @@ if (!state.resumeScheduled) {

}
function resume_(stream, state) {
debug('resume', state.reading);
if (!state.reading) {
stream.read(0);
}
state.resumeScheduled = false;

@@ -981,6 +905,4 @@ stream.emit('resume');

}
Readable.prototype.pause = function () {
debug('call pause flowing=%j', this._readableState.flowing);
if (this._readableState.flowing !== false) {

@@ -991,42 +913,32 @@ debug('pause');

}
this._readableState.paused = true;
return this;
};
function flow(stream) {
var state = stream._readableState;
const state = stream._readableState;
debug('flow', state.flowing);
while (state.flowing && stream.read() !== null);
}
while (state.flowing && stream.read() !== null) {
;
}
} // wrap an old-style stream as the async data source.
// wrap an old-style stream as the async data source.
// This is *not* part of the readable stream interface.
// It is an ugly unfortunate mess of history.
Readable.prototype.wrap = function (stream) {
var _this = this;
var state = this._readableState;
var paused = false;
stream.on('end', function () {
stream.on('end', () => {
debug('wrapped end');
if (state.decoder && !state.ended) {
var chunk = state.decoder.end();
if (chunk && chunk.length) _this.push(chunk);
if (chunk && chunk.length) this.push(chunk);
}
_this.push(null);
this.push(null);
});
stream.on('data', function (chunk) {
stream.on('data', chunk => {
debug('wrapped data');
if (state.decoder) chunk = state.decoder.write(chunk); // don't skip over falsy values in objectMode
if (state.decoder) chunk = state.decoder.write(chunk);
// don't skip over falsy values in objectMode
if (state.objectMode && (chunk === null || chunk === undefined)) return;else if (!state.objectMode && (!chunk || !chunk.length)) return;
var ret = _this.push(chunk);
var ret = this.push(chunk);
if (!ret) {

@@ -1036,5 +948,6 @@ paused = true;

}
}); // proxy all the other methods.
});
// proxy all the other methods.
// important when wrapping filters and duplexes.
for (var i in stream) {

@@ -1048,14 +961,13 @@ if (this[i] === undefined && typeof stream[i] === 'function') {

}
} // proxy certain important events.
}
// proxy certain important events.
for (var n = 0; n < kProxyEvents.length; n++) {
stream.on(kProxyEvents[n], this.emit.bind(this, kProxyEvents[n]));
} // when we try to consume some more bytes, simply unpause the
}
// when we try to consume some more bytes, simply unpause the
// underlying stream.
this._read = function (n) {
this._read = n => {
debug('wrapped _read', n);
if (paused) {

@@ -1066,6 +978,4 @@ paused = false;

};
return this;
};
if (typeof Symbol === 'function') {

@@ -1076,7 +986,5 @@ Readable.prototype[Symbol.asyncIterator] = function () {

}
return createReadableStreamAsyncIterator(this);
};
}
Object.defineProperty(Readable.prototype, 'readableHighWaterMark', {

@@ -1113,4 +1021,5 @@ // making it explicit this property is not enumerable

}
}); // exposed for testing purposes only.
});
// exposed for testing purposes only.
Readable._fromList = fromList;

@@ -1122,10 +1031,11 @@ Object.defineProperty(Readable.prototype, 'readableLength', {

enumerable: false,
get: function get() {
get() {
return this._readableState.length;
}
}); // Pluck off n bytes from an array of buffers.
});
// Pluck off n bytes from an array of buffers.
// Length is the combined lengths of all the buffers in the list.
// This function is designed to be inlinable, so please take care when making
// changes to the function body.
function fromList(n, state) {

@@ -1145,7 +1055,5 @@ // nothing buffered

}
function endReadable(stream) {
var state = stream._readableState;
debug('endReadable', state.endEmitted);
if (!state.endEmitted) {

@@ -1156,6 +1064,6 @@ state.ended = true;

}
function endReadableNT(state, stream) {
debug('endReadableNT', state.endEmitted, state.length); // Check that we didn't get one last unshift.
debug('endReadableNT', state.endEmitted, state.length);
// Check that we didn't get one last unshift.
if (!state.endEmitted && state.length === 0) {

@@ -1165,8 +1073,6 @@ state.endEmitted = true;

stream.emit('end');
if (state.autoDestroy) {
// In case of duplex streams we need a way to detect
// if the writable side is ready for autoDestroy as well
var wState = stream._writableState;
const wState = stream._writableState;
if (!wState || wState.autoDestroy && wState.finished) {

@@ -1178,3 +1084,2 @@ stream.destroy();

}
if (typeof Symbol === 'function') {

@@ -1185,7 +1090,5 @@ Readable.from = function (iterable, opts) {

}
return from(Readable, iterable, opts);
};
}
function indexOf(xs, x) {

@@ -1195,4 +1098,3 @@ for (var i = 0, l = xs.length; i < l; i++) {

}
return -1;
}

74

lib/_stream_transform.js

@@ -21,2 +21,3 @@ // Copyright Joyent, Inc. and other Node contributors.

// USE OR OTHER DEALINGS IN THE SOFTWARE.
// a transform stream is a readable/writable stream where you do

@@ -63,16 +64,13 @@ // something with the data. Sometimes it's called a "filter",

// the results of the previous transformed chunk were consumed.
'use strict';
module.exports = Transform;
var _require$codes = require('../errors').codes,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
var Duplex = require('./_stream_duplex');
const _require$codes = require('../errors').codes,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_TRANSFORM_ALREADY_TRANSFORMING = _require$codes.ERR_TRANSFORM_ALREADY_TRANSFORMING,
ERR_TRANSFORM_WITH_LENGTH_0 = _require$codes.ERR_TRANSFORM_WITH_LENGTH_0;
const Duplex = require('./_stream_duplex');
require('inherits')(Transform, Duplex);
function afterTransform(er, data) {

@@ -82,10 +80,9 @@ var ts = this._transformState;

var cb = ts.writecb;
if (cb === null) {
return this.emit('error', new ERR_MULTIPLE_CALLBACK());
}
ts.writechunk = null;
ts.writecb = null;
if (data != null) // single equals check for both `null` and `undefined`
if (data != null)
// single equals check for both `null` and `undefined`
this.push(data);

@@ -95,3 +92,2 @@ cb(er);

rs.reading = false;
if (rs.needReadable || rs.length < rs.highWaterMark) {

@@ -101,3 +97,2 @@ this._read(rs.highWaterMark);

}
function Transform(options) {

@@ -113,25 +108,23 @@ if (!(this instanceof Transform)) return new Transform(options);

writeencoding: null
}; // start out asking for a readable event once data is transformed.
};
this._readableState.needReadable = true; // we have implemented the _read method, and done the other things
// start out asking for a readable event once data is transformed.
this._readableState.needReadable = true;
// we have implemented the _read method, and done the other things
// that Readable wants before the first _read call, so unset the
// sync guard flag.
this._readableState.sync = false;
if (options) {
if (typeof options.transform === 'function') this._transform = options.transform;
if (typeof options.flush === 'function') this._flush = options.flush;
} // When the writable side finishes, then flush out anything remaining.
}
// When the writable side finishes, then flush out anything remaining.
this.on('prefinish', prefinish);
}
function prefinish() {
var _this = this;
if (typeof this._flush === 'function' && !this._readableState.destroyed) {
this._flush(function (er, data) {
done(_this, er, data);
this._flush((er, data) => {
done(this, er, data);
});

@@ -142,7 +135,8 @@ } else {

}
Transform.prototype.push = function (chunk, encoding) {
this._transformState.needTransform = false;
return Duplex.prototype.push.call(this, chunk, encoding);
}; // This is the part where you do stuff!
};
// This is the part where you do stuff!
// override this function in implementation classes.

@@ -157,8 +151,5 @@ // 'chunk' is an input chunk.

// never call cb(), then you'll never get another chunk.
Transform.prototype._transform = function (chunk, encoding, cb) {
cb(new ERR_METHOD_NOT_IMPLEMENTED('_transform()'));
};
Transform.prototype._write = function (chunk, encoding, cb) {

@@ -169,3 +160,2 @@ var ts = this._transformState;

ts.writeencoding = encoding;
if (!ts.transforming) {

@@ -175,13 +165,11 @@ var rs = this._readableState;

}
}; // Doesn't matter what the args are here.
};
// Doesn't matter what the args are here.
// _transform does all the work.
// That we got here means that the readable side wants more data.
Transform.prototype._read = function (n) {
var ts = this._transformState;
if (ts.writechunk !== null && !ts.transforming) {
ts.transforming = true;
this._transform(ts.writechunk, ts.writeencoding, ts.afterTransform);

@@ -194,16 +182,16 @@ } else {

};
Transform.prototype._destroy = function (err, cb) {
Duplex.prototype._destroy.call(this, err, function (err2) {
Duplex.prototype._destroy.call(this, err, err2 => {
cb(err2);
});
};
function done(stream, er, data) {
if (er) return stream.emit('error', er);
if (data != null) // single equals check for both `null` and `undefined`
stream.push(data); // TODO(BridgeAR): Write a test for these two error cases
if (data != null)
// single equals check for both `null` and `undefined`
stream.push(data);
// TODO(BridgeAR): Write a test for these two error cases
// if there's nothing in the write buffer, then that means
// that nothing more will ever be provided
if (stream._writableState.length) throw new ERR_TRANSFORM_WITH_LENGTH_0();

@@ -210,0 +198,0 @@ if (stream._transformState.transforming) throw new ERR_TRANSFORM_ALREADY_TRANSFORMING();

327

lib/_stream_writable.js

@@ -21,10 +21,12 @@ // Copyright Joyent, Inc. and other Node contributors.

// 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';
module.exports = Writable;
/* <replacement> */
function WriteReq(chunk, encoding, cb) {

@@ -35,14 +37,11 @@ this.chunk = chunk;

this.next = null;
} // It seems a linked list but it is not
}
// It seems a linked list but it is not
// there will be only 2 of these for each stream
function CorkedRequest(state) {
var _this = this;
this.next = null;
this.entry = null;
this.finish = function () {
onCorkedFinish(_this, state);
this.finish = () => {
onCorkedFinish(this, state);
};

@@ -53,4 +52,2 @@ }

/*<replacement>*/
var Duplex;

@@ -60,5 +57,5 @@ /*</replacement>*/

Writable.WritableState = WritableState;
/*<replacement>*/
var internalUtil = {
const internalUtil = {
deprecate: require('util-deprecate')

@@ -69,43 +66,33 @@ };

/*<replacement>*/
var Stream = require('./internal/streams/stream');
/*</replacement>*/
var Buffer = require('buffer').Buffer;
var OurUint8Array = global.Uint8Array || function () {};
const Buffer = require('buffer').Buffer;
const OurUint8Array = (typeof global !== 'undefined' ? global : typeof window !== 'undefined' ? window : typeof self !== 'undefined' ? self : {}).Uint8Array || function () {};
function _uint8ArrayToBuffer(chunk) {
return Buffer.from(chunk);
}
function _isUint8Array(obj) {
return Buffer.isBuffer(obj) || obj instanceof OurUint8Array;
}
var destroyImpl = require('./internal/streams/destroy');
var _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
var _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,
ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,
ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,
ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;
var errorOrDestroy = destroyImpl.errorOrDestroy;
const destroyImpl = require('./internal/streams/destroy');
const _require = require('./internal/streams/state'),
getHighWaterMark = _require.getHighWaterMark;
const _require$codes = require('../errors').codes,
ERR_INVALID_ARG_TYPE = _require$codes.ERR_INVALID_ARG_TYPE,
ERR_METHOD_NOT_IMPLEMENTED = _require$codes.ERR_METHOD_NOT_IMPLEMENTED,
ERR_MULTIPLE_CALLBACK = _require$codes.ERR_MULTIPLE_CALLBACK,
ERR_STREAM_CANNOT_PIPE = _require$codes.ERR_STREAM_CANNOT_PIPE,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED,
ERR_STREAM_NULL_VALUES = _require$codes.ERR_STREAM_NULL_VALUES,
ERR_STREAM_WRITE_AFTER_END = _require$codes.ERR_STREAM_WRITE_AFTER_END,
ERR_UNKNOWN_ENCODING = _require$codes.ERR_UNKNOWN_ENCODING;
const errorOrDestroy = destroyImpl.errorOrDestroy;
require('inherits')(Writable, Stream);
function nop() {}
function WritableState(options, stream, isDuplex) {
Duplex = Duplex || require('./_stream_duplex');
options = options || {}; // Duplex streams are both readable and writable, but share
options = options || {};
// Duplex streams are both readable and writable, but share
// the same options object.

@@ -115,84 +102,102 @@ // However, some cases require setting options to different

// e.g. options.readableObjectMode vs. options.writableObjectMode, etc.
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex;
if (typeof isDuplex !== 'boolean') isDuplex = stream instanceof Duplex; // object stream flag to indicate whether or not this stream
// object stream flag to indicate whether or not this stream
// contains buffers or objects.
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode;
this.objectMode = !!options.objectMode;
if (isDuplex) this.objectMode = this.objectMode || !!options.writableObjectMode; // the point at which write() starts returning false
// 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 = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex);
this.highWaterMark = getHighWaterMark(this, options, 'writableHighWaterMark', isDuplex); // if _final has been called
// if _final has been called
this.finalCalled = false;
this.finalCalled = false; // drain event flag.
// 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;
this.needDrain = false; // at the start of calling end()
// has it been destroyed
this.destroyed = false;
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?
// 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.
var noDecode = options.decodeStrings === false;
this.decodeStrings = !noDecode;
var noDecode = options.decodeStrings === false;
this.decodeStrings = !noDecode; // Crypto is kind of old and crusty. Historically, its default string
// 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.defaultEncoding || 'utf8';
this.defaultEncoding = options.defaultEncoding || 'utf8'; // not an actual buffer we keep track of, but a measurement
// 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;
this.length = 0; // a flag to see when we're in the middle of a write.
// a flag to see when we're in the middle of a write.
this.writing = false;
this.writing = false; // when true all writes will be buffered until .uncork() call
// when true all writes will be buffered until .uncork() call
this.corked = 0;
this.corked = 0; // a flag to be able to tell if the onwrite cb is called immediately,
// 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;
this.sync = true; // a flag to know if we're processing previously buffered items, which
// 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;
this.bufferProcessing = false; // the callback that's passed to _write(chunk,cb)
// the callback that's passed to _write(chunk,cb)
this.onwrite = function (er) {
onwrite(stream, er);
}; // the callback that the user supplies to write(chunk,encoding,cb)
};
// the callback that the user supplies to write(chunk,encoding,cb)
this.writecb = null;
this.writecb = null; // the amount that is being written when _write is called.
// the amount that is being written when _write is called.
this.writelen = 0;
this.bufferedRequest = null;
this.lastBufferedRequest = null; // number of pending user-supplied write callbacks
this.lastBufferedRequest = null;
// number of pending user-supplied write callbacks
// this must be 0 before 'finish' can be emitted
this.pendingcb = 0;
this.pendingcb = 0; // emit prefinish if the only thing we're waiting for is _write cbs
// emit prefinish if the only thing we're waiting for is _write cbs
// This is relevant for synchronous Transform streams
this.prefinished = false;
this.prefinished = false; // True if the error was already emitted and should not be thrown again
// True if the error was already emitted and should not be thrown again
this.errorEmitted = false;
this.errorEmitted = false; // Should close be emitted on destroy. Defaults to true.
// Should close be emitted on destroy. Defaults to true.
this.emitClose = options.emitClose !== false;
this.emitClose = options.emitClose !== false; // Should .destroy() be called after 'finish' (and potentially 'end')
// Should .destroy() be called after 'finish' (and potentially 'end')
this.autoDestroy = !!options.autoDestroy;
this.autoDestroy = !!options.autoDestroy; // count buffered requests
// count buffered requests
this.bufferedRequestCount = 0;
this.bufferedRequestCount = 0; // allocate the first CorkedRequest, there is always
// allocate the first CorkedRequest, there is always
// one allocated and free to use, and we maintain at most two
this.corkedRequestsFree = new CorkedRequest(this);
}
WritableState.prototype.getBuffer = function getBuffer() {
var current = this.bufferedRequest;
var out = [];
while (current) {

@@ -202,6 +207,4 @@ out.push(current);

}
return out;
};
(function () {

@@ -215,8 +218,7 @@ try {

} catch (_) {}
})(); // Test _writableState for inheritance to account for Duplex streams,
})();
// Test _writableState for inheritance to account for Duplex streams,
// whose prototype chain only points to Readable.
var realHasInstance;
if (typeof Symbol === 'function' && Symbol.hasInstance && typeof Function.prototype[Symbol.hasInstance] === 'function') {

@@ -236,19 +238,21 @@ realHasInstance = Function.prototype[Symbol.hasInstance];

}
function Writable(options) {
Duplex = Duplex || require('./_stream_duplex');
function Writable(options) {
Duplex = Duplex || require('./_stream_duplex'); // Writable ctor is applied to Duplexes, too.
// 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
var isDuplex = this instanceof Duplex;
const isDuplex = this instanceof Duplex;
if (!isDuplex && !realHasInstance.call(Writable, this)) return new Writable(options);
this._writableState = new WritableState(options, this, isDuplex); // legacy.
this._writableState = new WritableState(options, this, isDuplex);
// legacy.
this.writable = true;
if (options) {

@@ -260,24 +264,21 @@ if (typeof options.write === 'function') this._write = options.write;

}
Stream.call(this);
} // Otherwise people can pipe Writable streams, which is just wrong.
}
// Otherwise people can pipe Writable streams, which is just wrong.
Writable.prototype.pipe = function () {
errorOrDestroy(this, new ERR_STREAM_CANNOT_PIPE());
};
function writeAfterEnd(stream, cb) {
var er = new ERR_STREAM_WRITE_AFTER_END(); // TODO: defer error events consistently everywhere, not just the cb
var er = new ERR_STREAM_WRITE_AFTER_END();
// TODO: defer error events consistently everywhere, not just the cb
errorOrDestroy(stream, er);
process.nextTick(cb, er);
} // Checks that a user-supplied chunk is valid, especially for the particular
}
// Checks that a user-supplied chunk is valid, especially for the particular
// mode the stream is in. Currently this means that `null` is never accepted
// and undefined/non-string values are only allowed in object mode.
function validChunk(stream, state, chunk, cb) {
var er;
if (chunk === null) {

@@ -288,3 +289,2 @@ er = new ERR_STREAM_NULL_VALUES();

}
if (er) {

@@ -295,16 +295,11 @@ errorOrDestroy(stream, er);

}
return true;
}
Writable.prototype.write = function (chunk, encoding, cb) {
var state = this._writableState;
var ret = false;
var isBuf = !state.objectMode && _isUint8Array(chunk);
if (isBuf && !Buffer.isBuffer(chunk)) {
chunk = _uint8ArrayToBuffer(chunk);
}
if (typeof encoding === 'function') {

@@ -314,3 +309,2 @@ cb = encoding;

}
if (isBuf) encoding = 'buffer';else if (!encoding) encoding = state.defaultEncoding;

@@ -324,10 +318,7 @@ if (typeof cb !== 'function') cb = nop;

};
Writable.prototype.cork = function () {
this._writableState.corked++;
};
Writable.prototype.uncork = function () {
var state = this._writableState;
if (state.corked) {

@@ -338,3 +329,2 @@ state.corked--;

};
Writable.prototype.setDefaultEncoding = function setDefaultEncoding(encoding) {

@@ -347,3 +337,2 @@ // node::ParseEncoding() requires lower case.

};
Object.defineProperty(Writable.prototype, 'writableBuffer', {

@@ -358,3 +347,2 @@ // making it explicit this property is not enumerable

});
function decodeChunk(state, chunk, encoding) {

@@ -364,6 +352,4 @@ if (!state.objectMode && state.decodeStrings !== false && typeof chunk === 'string') {

}
return chunk;
}
Object.defineProperty(Writable.prototype, 'writableHighWaterMark', {

@@ -377,10 +363,10 @@ // making it explicit this property is not enumerable

}
}); // if we're already writing something, then just put 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, isBuf, chunk, encoding, cb) {
if (!isBuf) {
var newChunk = decodeChunk(state, chunk, encoding);
if (chunk !== newChunk) {

@@ -392,19 +378,16 @@ isBuf = true;

}
var len = state.objectMode ? 1 : chunk.length;
state.length += len;
var ret = state.length < state.highWaterMark; // we must ensure that previous needDrain will not be reset to false.
var 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) {
var last = state.lastBufferedRequest;
state.lastBufferedRequest = {
chunk: chunk,
encoding: encoding,
isBuf: isBuf,
chunk,
encoding,
isBuf,
callback: cb,
next: null
};
if (last) {

@@ -415,3 +398,2 @@ last.next = state.lastBufferedRequest;

}
state.bufferedRequestCount += 1;

@@ -421,6 +403,4 @@ } else {

}
return ret;
}
function doWrite(stream, state, writev, len, chunk, encoding, cb) {

@@ -434,12 +414,10 @@ state.writelen = len;

}
function onwriteError(stream, state, sync, er, cb) {
--state.pendingcb;
if (sync) {
// defer the callback if we are being called synchronously
// to avoid piling up things on the stack
process.nextTick(cb, er); // this can emit finish, and it will always happen
process.nextTick(cb, er);
// this can emit finish, and it will always happen
// after error
process.nextTick(finishMaybe, stream, state);

@@ -453,9 +431,8 @@ stream._writableState.errorEmitted = true;

stream._writableState.errorEmitted = true;
errorOrDestroy(stream, er); // this can emit finish, but finish must
errorOrDestroy(stream, er);
// this can emit finish, but finish must
// always follow error
finishMaybe(stream, state);
}
}
function onwriteStateUpdate(state) {

@@ -467,3 +444,2 @@ state.writing = false;

}
function onwrite(stream, er) {

@@ -478,7 +454,5 @@ var state = stream._writableState;

var finished = needFinish(state) || stream.destroyed;
if (!finished && !state.corked && !state.bufferProcessing && state.bufferedRequest) {
clearBuffer(stream, state);
}
if (sync) {

@@ -491,3 +465,2 @@ process.nextTick(afterWrite, stream, state, finished, cb);

}
function afterWrite(stream, state, finished, cb) {

@@ -498,7 +471,7 @@ if (!finished) onwriteDrain(stream, state);

finishMaybe(stream, state);
} // Must force callback to be called on nextTick, so that we don't
}
// Must force callback to be called on nextTick, so that we don't
// emit 'drain' before the write() consumer gets the 'false' return
// value, and has a chance to attach a 'drain' listener.
function onwriteDrain(stream, state) {

@@ -509,9 +482,8 @@ if (state.length === 0 && state.needDrain) {

}
} // if there's something in the buffer waiting, then process it
}
// if there's something in the buffer waiting, then process it
function clearBuffer(stream, state) {
state.bufferProcessing = true;
var entry = state.bufferedRequest;
if (stream._writev && entry && entry.next) {

@@ -525,3 +497,2 @@ // Fast case, write everything using _writev()

var allBuffers = true;
while (entry) {

@@ -533,10 +504,9 @@ buffer[count] = entry;

}
buffer.allBuffers = allBuffers;
doWrite(stream, state, true, state.length, buffer, '', holder.finish);
buffer.allBuffers = allBuffers;
doWrite(stream, state, true, state.length, buffer, '', holder.finish); // doWrite is almost always async, defer these to save a bit of time
// doWrite is almost always async, defer these to save a bit of time
// as the hot path ends with doWrite
state.pendingcb++;
state.lastBufferedRequest = null;
if (holder.next) {

@@ -548,3 +518,2 @@ state.corkedRequestsFree = holder.next;

}
state.bufferedRequestCount = 0;

@@ -560,7 +529,7 @@ } else {

entry = entry.next;
state.bufferedRequestCount--; // if we didn't call the onwrite immediately, then
state.bufferedRequestCount--;
// if we didn't call the onwrite immediately, then
// it means that we need to wait until it does.
// also, that means that the chunk and cb are currently
// being processed, so move the buffer counter past them.
if (state.writing) {

@@ -570,19 +539,13 @@ break;

}
if (entry === null) state.lastBufferedRequest = null;
}
state.bufferedRequest = entry;
state.bufferProcessing = false;
}
Writable.prototype._write = function (chunk, encoding, cb) {
cb(new ERR_METHOD_NOT_IMPLEMENTED('_write()'));
};
Writable.prototype._writev = null;
Writable.prototype.end = function (chunk, encoding, cb) {
var state = this._writableState;
if (typeof chunk === 'function') {

@@ -596,15 +559,14 @@ cb = chunk;

}
if (chunk !== null && chunk !== undefined) this.write(chunk, encoding);
if (chunk !== null && chunk !== undefined) this.write(chunk, encoding); // .end() fully uncorks
// .end() fully uncorks
if (state.corked) {
state.corked = 1;
this.uncork();
} // ignore unnecessary end() calls.
}
// ignore unnecessary end() calls.
if (!state.ending) endWritable(this, state, cb);
return this;
};
Object.defineProperty(Writable.prototype, 'writableLength', {

@@ -615,19 +577,15 @@ // making it explicit this property is not enumerable

enumerable: false,
get: function get() {
get() {
return this._writableState.length;
}
});
function needFinish(state) {
return state.ending && state.length === 0 && state.bufferedRequest === null && !state.finished && !state.writing;
}
function callFinal(stream, state) {
stream._final(function (err) {
stream._final(err => {
state.pendingcb--;
if (err) {
errorOrDestroy(stream, err);
}
state.prefinished = true;

@@ -638,3 +596,2 @@ stream.emit('prefinish');

}
function prefinish(stream, state) {

@@ -652,18 +609,13 @@ if (!state.prefinished && !state.finalCalled) {

}
function finishMaybe(stream, state) {
var need = needFinish(state);
if (need) {
prefinish(stream, state);
if (state.pendingcb === 0) {
state.finished = true;
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
var rState = stream._readableState;
const rState = stream._readableState;
if (!rState || rState.autoDestroy && rState.endEmitted) {

@@ -675,22 +627,16 @@ stream.destroy();

}
return need;
}
function endWritable(stream, state, cb) {
state.ending = true;
finishMaybe(stream, state);
if (cb) {
if (state.finished) process.nextTick(cb);else stream.once('finish', cb);
}
state.ended = true;
stream.writable = false;
}
function onCorkedFinish(corkReq, state, err) {
var entry = corkReq.entry;
corkReq.entry = null;
while (entry) {

@@ -701,8 +647,7 @@ var cb = entry.callback;

entry = entry.next;
} // reuse the free corkReq.
}
// reuse the free corkReq.
state.corkedRequestsFree.next = corkReq;
}
Object.defineProperty(Writable.prototype, 'destroyed', {

@@ -713,10 +658,9 @@ // making it explicit this property is not enumerable

enumerable: false,
get: function get() {
get() {
if (this._writableState === undefined) {
return false;
}
return this._writableState.destroyed;
},
set: function set(value) {
set(value) {
// we ignore the value if the stream

@@ -726,6 +670,6 @@ // has not been initialized yet

return;
} // backward compatibility, the user is explicitly
}
// backward compatibility, the user is explicitly
// managing destroyed
this._writableState.destroyed = value;

@@ -736,5 +680,4 @@ }

Writable.prototype._undestroy = destroyImpl.undestroy;
Writable.prototype._destroy = function (err, cb) {
cb(err);
};

204

lib/internal/streams/async_iterator.js
'use strict';
var _Object$setPrototypeO;
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
var finished = require('./end-of-stream');
var kLastResolve = Symbol('lastResolve');
var kLastReject = Symbol('lastReject');
var kError = Symbol('error');
var kEnded = Symbol('ended');
var kLastPromise = Symbol('lastPromise');
var kHandlePromise = Symbol('handlePromise');
var kStream = Symbol('stream');
const finished = require('./end-of-stream');
const kLastResolve = Symbol('lastResolve');
const kLastReject = Symbol('lastReject');
const kError = Symbol('error');
const kEnded = Symbol('ended');
const kLastPromise = Symbol('lastPromise');
const kHandlePromise = Symbol('handlePromise');
const kStream = Symbol('stream');
function createIterResult(value, done) {
return {
value: value,
done: done
value,
done
};
}
function readAndResolve(iter) {
var resolve = iter[kLastResolve];
const resolve = iter[kLastResolve];
if (resolve !== null) {
var data = iter[kStream].read(); // we defer if data is null
const data = iter[kStream].read();
// we defer if data is null
// we can be expecting either 'end' or
// 'error'
if (data !== null) {

@@ -40,3 +32,2 @@ iter[kLastPromise] = null;

}
function onReadable(iter) {

@@ -47,6 +38,5 @@ // we wait for the next tick, because it might

}
function wrapForNext(lastPromise, iter) {
return function (resolve, reject) {
lastPromise.then(function () {
return (resolve, reject) => {
lastPromise.then(() => {
if (iter[kEnded]) {

@@ -56,3 +46,2 @@ resolve(createIterResult(undefined, true));

}
iter[kHandlePromise](resolve, reject);

@@ -62,24 +51,17 @@ }, reject);

}
var AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
var ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf((_Object$setPrototypeO = {
const AsyncIteratorPrototype = Object.getPrototypeOf(function () {});
const ReadableStreamAsyncIteratorPrototype = Object.setPrototypeOf({
get stream() {
return this[kStream];
},
next: function next() {
var _this = this;
next() {
// if we have detected an error in the meanwhile
// reject straight away
var error = this[kError];
const error = this[kError];
if (error !== null) {
return Promise.reject(error);
}
if (this[kEnded]) {
return Promise.resolve(createIterResult(undefined, true));
}
if (this[kStream].destroyed) {

@@ -90,6 +72,6 @@ // We need to defer via nextTick because if .destroy(err) is

// waiting to be emitted.
return new Promise(function (resolve, reject) {
process.nextTick(function () {
if (_this[kError]) {
reject(_this[kError]);
return new Promise((resolve, reject) => {
process.nextTick(() => {
if (this[kError]) {
reject(this[kError]);
} else {

@@ -100,11 +82,10 @@ resolve(createIterResult(undefined, true));

});
} // if we have multiple next() calls
}
// if we have multiple next() calls
// we will wait for the previous Promise to finish
// this logic is optimized to support for await loops,
// where next() is only called once at a time
var lastPromise = this[kLastPromise];
var promise;
const lastPromise = this[kLastPromise];
let promise;
if (lastPromise) {

@@ -115,74 +96,76 @@ promise = new Promise(wrapForNext(lastPromise, this));

// without triggering the next() queue
var data = this[kStream].read();
const data = this[kStream].read();
if (data !== null) {
return Promise.resolve(createIterResult(data, false));
}
promise = new Promise(this[kHandlePromise]);
}
this[kLastPromise] = promise;
return promise;
},
[Symbol.asyncIterator]() {
return this;
},
return() {
// destroy(err, cb) is a private API
// we can guarantee we have that here, because we control the
// Readable class this is attached to
return new Promise((resolve, reject) => {
this[kStream].destroy(null, err => {
if (err) {
reject(err);
return;
}
resolve(createIterResult(undefined, true));
});
});
}
}, _defineProperty(_Object$setPrototypeO, Symbol.asyncIterator, function () {
return this;
}), _defineProperty(_Object$setPrototypeO, "return", function _return() {
var _this2 = this;
// destroy(err, cb) is a private API
// we can guarantee we have that here, because we control the
// Readable class this is attached to
return new Promise(function (resolve, reject) {
_this2[kStream].destroy(null, function (err) {
if (err) {
reject(err);
return;
}
resolve(createIterResult(undefined, true));
});
}, AsyncIteratorPrototype);
const createReadableStreamAsyncIterator = stream => {
const iterator = Object.create(ReadableStreamAsyncIteratorPrototype, {
[kStream]: {
value: stream,
writable: true
},
[kLastResolve]: {
value: null,
writable: true
},
[kLastReject]: {
value: null,
writable: true
},
[kError]: {
value: null,
writable: true
},
[kEnded]: {
value: stream._readableState.endEmitted,
writable: true
},
// the function passed to new Promise
// is cached so we avoid allocating a new
// closure at every run
[kHandlePromise]: {
value: (resolve, reject) => {
const data = iterator[kStream].read();
if (data) {
iterator[kLastPromise] = null;
iterator[kLastResolve] = null;
iterator[kLastReject] = null;
resolve(createIterResult(data, false));
} else {
iterator[kLastResolve] = resolve;
iterator[kLastReject] = reject;
}
},
writable: true
}
});
}), _Object$setPrototypeO), AsyncIteratorPrototype);
var createReadableStreamAsyncIterator = function createReadableStreamAsyncIterator(stream) {
var _Object$create;
var iterator = Object.create(ReadableStreamAsyncIteratorPrototype, (_Object$create = {}, _defineProperty(_Object$create, kStream, {
value: stream,
writable: true
}), _defineProperty(_Object$create, kLastResolve, {
value: null,
writable: true
}), _defineProperty(_Object$create, kLastReject, {
value: null,
writable: true
}), _defineProperty(_Object$create, kError, {
value: null,
writable: true
}), _defineProperty(_Object$create, kEnded, {
value: stream._readableState.endEmitted,
writable: true
}), _defineProperty(_Object$create, kHandlePromise, {
value: function value(resolve, reject) {
var data = iterator[kStream].read();
if (data) {
iterator[kLastPromise] = null;
iterator[kLastResolve] = null;
iterator[kLastReject] = null;
resolve(createIterResult(data, false));
} else {
iterator[kLastResolve] = resolve;
iterator[kLastReject] = reject;
}
},
writable: true
}), _Object$create));
iterator[kLastPromise] = null;
finished(stream, function (err) {
finished(stream, err => {
if (err && err.code !== 'ERR_STREAM_PREMATURE_CLOSE') {
var reject = iterator[kLastReject]; // reject if we are waiting for data in the Promise
const reject = iterator[kLastReject];
// reject if we are waiting for data in the Promise
// returned by next() and store the error
if (reject !== null) {

@@ -194,9 +177,6 @@ iterator[kLastPromise] = null;

}
iterator[kError] = err;
return;
}
var resolve = iterator[kLastResolve];
const resolve = iterator[kLastResolve];
if (resolve !== null) {

@@ -208,3 +188,2 @@ iterator[kLastPromise] = null;

}
iterator[kEnded] = true;

@@ -215,3 +194,2 @@ });

};
module.exports = createReadableStreamAsyncIterator;

325

lib/internal/streams/buffer_list.js
'use strict';
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }
function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }
var _require = require('buffer'),
Buffer = _require.Buffer;
var _require2 = require('util'),
inspect = _require2.inspect;
var custom = inspect && inspect.custom || 'inspect';
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
const _require = require('buffer'),
Buffer = _require.Buffer;
const _require2 = require('util'),
inspect = _require2.inspect;
const custom = inspect && inspect.custom || 'inspect';
function copyBuffer(src, target, offset) {
Buffer.prototype.copy.call(src, target, offset);
}
module.exports =
/*#__PURE__*/
function () {
function BufferList() {
_classCallCheck(this, BufferList);
module.exports = class BufferList {
constructor() {
this.head = null;

@@ -37,175 +22,135 @@ this.tail = null;

}
_createClass(BufferList, [{
key: "push",
value: function push(v) {
var entry = {
data: v,
next: null
};
if (this.length > 0) this.tail.next = entry;else this.head = entry;
this.tail = entry;
++this.length;
push(v) {
const entry = {
data: v,
next: null
};
if (this.length > 0) this.tail.next = entry;else this.head = entry;
this.tail = entry;
++this.length;
}
unshift(v) {
const entry = {
data: v,
next: this.head
};
if (this.length === 0) this.tail = entry;
this.head = entry;
++this.length;
}
shift() {
if (this.length === 0) return;
const ret = this.head.data;
if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
--this.length;
return ret;
}
clear() {
this.head = this.tail = null;
this.length = 0;
}
join(s) {
if (this.length === 0) return '';
var p = this.head;
var ret = '' + p.data;
while (p = p.next) ret += s + p.data;
return ret;
}
concat(n) {
if (this.length === 0) return Buffer.alloc(0);
const ret = Buffer.allocUnsafe(n >>> 0);
var p = this.head;
var i = 0;
while (p) {
copyBuffer(p.data, ret, i);
i += p.data.length;
p = p.next;
}
}, {
key: "unshift",
value: function unshift(v) {
var entry = {
data: v,
next: this.head
};
if (this.length === 0) this.tail = entry;
this.head = entry;
++this.length;
}
}, {
key: "shift",
value: function shift() {
if (this.length === 0) return;
var ret = this.head.data;
if (this.length === 1) this.head = this.tail = null;else this.head = this.head.next;
--this.length;
return ret;
}
}, {
key: "clear",
value: function clear() {
this.head = this.tail = null;
this.length = 0;
}
}, {
key: "join",
value: function join(s) {
if (this.length === 0) return '';
var p = this.head;
var ret = '' + p.data;
return ret;
}
while (p = p.next) {
ret += s + p.data;
}
return ret;
// Consumes a specified amount of bytes or characters from the buffered data.
consume(n, hasStrings) {
var ret;
if (n < this.head.data.length) {
// `slice` is the same for buffers and strings.
ret = this.head.data.slice(0, n);
this.head.data = this.head.data.slice(n);
} else if (n === this.head.data.length) {
// First chunk is a perfect match.
ret = this.shift();
} else {
// Result spans more than one buffer.
ret = hasStrings ? this._getString(n) : this._getBuffer(n);
}
}, {
key: "concat",
value: function concat(n) {
if (this.length === 0) return Buffer.alloc(0);
var ret = Buffer.allocUnsafe(n >>> 0);
var p = this.head;
var i = 0;
return ret;
}
first() {
return this.head.data;
}
while (p) {
copyBuffer(p.data, ret, i);
i += p.data.length;
p = p.next;
// Consumes a specified amount of characters from the buffered data.
_getString(n) {
var p = this.head;
var c = 1;
var ret = p.data;
n -= ret.length;
while (p = p.next) {
const str = p.data;
const nb = n > str.length ? str.length : n;
if (nb === str.length) ret += str;else ret += str.slice(0, n);
n -= nb;
if (n === 0) {
if (nb === str.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = str.slice(nb);
}
break;
}
return ret;
} // Consumes a specified amount of bytes or characters from the buffered data.
}, {
key: "consume",
value: function consume(n, hasStrings) {
var ret;
if (n < this.head.data.length) {
// `slice` is the same for buffers and strings.
ret = this.head.data.slice(0, n);
this.head.data = this.head.data.slice(n);
} else if (n === this.head.data.length) {
// First chunk is a perfect match.
ret = this.shift();
} else {
// Result spans more than one buffer.
ret = hasStrings ? this._getString(n) : this._getBuffer(n);
}
return ret;
++c;
}
}, {
key: "first",
value: function first() {
return this.head.data;
} // Consumes a specified amount of characters from the buffered data.
this.length -= c;
return ret;
}
}, {
key: "_getString",
value: function _getString(n) {
var p = this.head;
var c = 1;
var ret = p.data;
n -= ret.length;
while (p = p.next) {
var str = p.data;
var nb = n > str.length ? str.length : n;
if (nb === str.length) ret += str;else ret += str.slice(0, n);
n -= nb;
if (n === 0) {
if (nb === str.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = str.slice(nb);
}
break;
// Consumes a specified amount of bytes from the buffered data.
_getBuffer(n) {
const ret = Buffer.allocUnsafe(n);
var p = this.head;
var c = 1;
p.data.copy(ret);
n -= p.data.length;
while (p = p.next) {
const buf = p.data;
const nb = n > buf.length ? buf.length : n;
buf.copy(ret, ret.length - n, 0, nb);
n -= nb;
if (n === 0) {
if (nb === buf.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = buf.slice(nb);
}
++c;
break;
}
this.length -= c;
return ret;
} // Consumes a specified amount of bytes from the buffered data.
}, {
key: "_getBuffer",
value: function _getBuffer(n) {
var ret = Buffer.allocUnsafe(n);
var p = this.head;
var c = 1;
p.data.copy(ret);
n -= p.data.length;
while (p = p.next) {
var buf = p.data;
var nb = n > buf.length ? buf.length : n;
buf.copy(ret, ret.length - n, 0, nb);
n -= nb;
if (n === 0) {
if (nb === buf.length) {
++c;
if (p.next) this.head = p.next;else this.head = this.tail = null;
} else {
this.head = p;
p.data = buf.slice(nb);
}
break;
}
++c;
}
this.length -= c;
return ret;
} // Make sure the linked list only shows the minimal necessary information.
}, {
key: custom,
value: function value(_, options) {
return inspect(this, _objectSpread({}, options, {
// Only inspect one level.
depth: 0,
// It should not recurse.
customInspect: false
}));
++c;
}
}]);
this.length -= c;
return ret;
}
return BufferList;
}();
// Make sure the linked list only shows the minimal necessary information.
[custom](_, options) {
return inspect(this, _objectSpread(_objectSpread({}, options), {}, {
// Only inspect one level.
depth: 0,
// It should not recurse.
customInspect: false
}));
}
};

58

lib/internal/streams/destroy.js

@@ -1,9 +0,7 @@

'use strict'; // undocumented cb() API, needed for core, not for public API
'use strict';
// undocumented cb() API, needed for core, not for public API
function destroy(err, cb) {
var _this = this;
var readableDestroyed = this._readableState && this._readableState.destroyed;
var writableDestroyed = this._writableState && this._writableState.destroyed;
const readableDestroyed = this._readableState && this._readableState.destroyed;
const writableDestroyed = this._writableState && this._writableState.destroyed;
if (readableDestroyed || writableDestroyed) {

@@ -20,38 +18,35 @@ if (cb) {

}
return this;
}
return this;
} // we set destroyed to true before firing error callbacks in order
// we set destroyed to true before firing error callbacks in order
// to make it re-entrance safe in case destroy() is called within callbacks
if (this._readableState) {
this._readableState.destroyed = true;
} // if this is a duplex stream mark the writable part as destroyed as well
}
// if this is a duplex stream mark the writable part as destroyed as well
if (this._writableState) {
this._writableState.destroyed = true;
}
this._destroy(err || null, function (err) {
this._destroy(err || null, err => {
if (!cb && err) {
if (!_this._writableState) {
process.nextTick(emitErrorAndCloseNT, _this, err);
} else if (!_this._writableState.errorEmitted) {
_this._writableState.errorEmitted = true;
process.nextTick(emitErrorAndCloseNT, _this, err);
if (!this._writableState) {
process.nextTick(emitErrorAndCloseNT, this, err);
} else if (!this._writableState.errorEmitted) {
this._writableState.errorEmitted = true;
process.nextTick(emitErrorAndCloseNT, this, err);
} else {
process.nextTick(emitCloseNT, _this);
process.nextTick(emitCloseNT, this);
}
} else if (cb) {
process.nextTick(emitCloseNT, _this);
process.nextTick(emitCloseNT, this);
cb(err);
} else {
process.nextTick(emitCloseNT, _this);
process.nextTick(emitCloseNT, this);
}
});
return this;
}
function emitErrorAndCloseNT(self, err) {

@@ -61,3 +56,2 @@ emitErrorNT(self, err);

}
function emitCloseNT(self) {

@@ -68,3 +62,2 @@ if (self._writableState && !self._writableState.emitClose) return;

}
function undestroy() {

@@ -77,3 +70,2 @@ if (this._readableState) {

}
if (this._writableState) {

@@ -89,7 +81,5 @@ this._writableState.destroyed = false;

}
function emitErrorNT(self, err) {
self.emit('error', err);
}
function errorOrDestroy(stream, err) {

@@ -101,11 +91,11 @@ // We have tests that rely on errors being emitted

// semver major update we should change the default to this.
var rState = stream._readableState;
var wState = stream._writableState;
const rState = stream._readableState;
const wState = stream._writableState;
if (rState && rState.autoDestroy || wState && wState.autoDestroy) stream.destroy(err);else stream.emit('error', err);
}
module.exports = {
destroy: destroy,
undestroy: undestroy,
errorOrDestroy: errorOrDestroy
destroy,
undestroy,
errorOrDestroy
};

42

lib/internal/streams/end-of-stream.js
// Ported from https://github.com/mafintosh/end-of-stream with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';
var ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
const ERR_STREAM_PREMATURE_CLOSE = require('../../../errors').codes.ERR_STREAM_PREMATURE_CLOSE;
function once(callback) {
var called = false;
let called = false;
return function () {
if (called) return;
called = true;
for (var _len = arguments.length, args = new Array(_len), _key = 0; _key < _len; _key++) {
args[_key] = arguments[_key];
}
callback.apply(this, args);
};
}
function noop() {}
function isRequest(stream) {
return stream.setHeader && typeof stream.abort === 'function';
}
function eos(stream, opts, callback) {

@@ -31,12 +26,9 @@ if (typeof opts === 'function') return eos(stream, null, opts);

callback = once(callback || noop);
var readable = opts.readable || opts.readable !== false && stream.readable;
var writable = opts.writable || opts.writable !== false && stream.writable;
var onlegacyfinish = function onlegacyfinish() {
let readable = opts.readable || opts.readable !== false && stream.readable;
let writable = opts.writable || opts.writable !== false && stream.writable;
const onlegacyfinish = () => {
if (!stream.writable) onfinish();
};
var writableEnded = stream._writableState && stream._writableState.finished;
var onfinish = function onfinish() {
const onfinish = () => {
writable = false;

@@ -46,6 +38,4 @@ writableEnded = true;

};
var readableEnded = stream._readableState && stream._readableState.endEmitted;
var onend = function onend() {
const onend = () => {
readable = false;

@@ -55,10 +45,7 @@ readableEnded = true;

};
var onerror = function onerror(err) {
const onerror = err => {
callback.call(stream, err);
};
var onclose = function onclose() {
var err;
const onclose = () => {
let err;
if (readable && !readableEnded) {

@@ -68,3 +55,2 @@ if (!stream._readableState || !stream._readableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();

}
if (writable && !writableEnded) {

@@ -75,7 +61,5 @@ if (!stream._writableState || !stream._writableState.ended) err = new ERR_STREAM_PREMATURE_CLOSE();

};
var onrequest = function onrequest() {
const onrequest = () => {
stream.req.on('finish', onfinish);
};
if (isRequest(stream)) {

@@ -90,3 +74,2 @@ stream.on('complete', onfinish);

}
stream.on('end', onend);

@@ -109,3 +92,2 @@ stream.on('finish', onfinish);

}
module.exports = eos;

42

lib/internal/streams/from.js
'use strict';
function asyncGeneratorStep(gen, resolve, reject, _next, _throw, key, arg) { try { var info = gen[key](arg); var value = info.value; } catch (error) { reject(error); return; } if (info.done) { resolve(value); } else { Promise.resolve(value).then(_next, _throw); } }
function _asyncToGenerator(fn) { return function () { var self = this, args = arguments; return new Promise(function (resolve, reject) { var gen = fn.apply(self, args); function _next(value) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "next", value); } function _throw(err) { asyncGeneratorStep(gen, resolve, reject, _next, _throw, "throw", err); } _next(undefined); }); }; }
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }
function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
var ERR_INVALID_ARG_TYPE = require('../../../errors').codes.ERR_INVALID_ARG_TYPE;
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); enumerableOnly && (symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; })), keys.push.apply(keys, symbols); } return keys; }
function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
function _defineProperty(obj, key, value) { key = _toPropertyKey(key); if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }
function _toPropertyKey(arg) { var key = _toPrimitive(arg, "string"); return typeof key === "symbol" ? key : String(key); }
function _toPrimitive(input, hint) { if (typeof input !== "object" || input === null) return input; var prim = input[Symbol.toPrimitive]; if (prim !== undefined) { var res = prim.call(input, hint || "default"); if (typeof res !== "object") return res; throw new TypeError("@@toPrimitive must return a primitive value."); } return (hint === "string" ? String : Number)(input); }
const ERR_INVALID_ARG_TYPE = require('../../../errors').codes.ERR_INVALID_ARG_TYPE;
function from(Readable, iterable, opts) {
var iterator;
let iterator;
if (iterable && typeof iterable.next === 'function') {
iterator = iterable;
} else if (iterable && iterable[Symbol.asyncIterator]) iterator = iterable[Symbol.asyncIterator]();else if (iterable && iterable[Symbol.iterator]) iterator = iterable[Symbol.iterator]();else throw new ERR_INVALID_ARG_TYPE('iterable', ['Iterable'], iterable);
var readable = new Readable(_objectSpread({
const readable = new Readable(_objectSpread({
objectMode: true
}, opts)); // Reading boolean to protect against _read
}, opts));
// Reading boolean to protect against _read
// being called before last iteration completion.
var reading = false;
let reading = false;
readable._read = function () {

@@ -35,17 +28,14 @@ if (!reading) {

};
function next() {
return _next2.apply(this, arguments);
}
function _next2() {
_next2 = _asyncToGenerator(function* () {
try {
var _ref = yield iterator.next(),
value = _ref.value,
done = _ref.done;
const _yield$iterator$next = yield iterator.next(),
value = _yield$iterator$next.value,
done = _yield$iterator$next.done;
if (done) {
readable.push(null);
} else if (readable.push((yield value))) {
} else if (readable.push(yield value)) {
next();

@@ -61,6 +51,4 @@ } else {

}
return readable;
}
module.exports = from;

49

lib/internal/streams/pipeline.js
// Ported from https://github.com/mafintosh/pump with
// permission from the author, Mathias Buus (@mafintosh).
'use strict';
var eos;
let eos;
function once(callback) {
var called = false;
let called = false;
return function () {
if (called) return;
called = true;
callback.apply(void 0, arguments);
callback(...arguments);
};
}
var _require$codes = require('../../../errors').codes,
ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
const _require$codes = require('../../../errors').codes,
ERR_MISSING_ARGS = _require$codes.ERR_MISSING_ARGS,
ERR_STREAM_DESTROYED = _require$codes.ERR_STREAM_DESTROYED;
function noop(err) {

@@ -24,11 +22,9 @@ // Rethrow the error if it exists to avoid swallowing it

}
function isRequest(stream) {
return stream.setHeader && typeof stream.abort === 'function';
}
function destroyer(stream, reading, writing, callback) {
callback = once(callback);
var closed = false;
stream.on('close', function () {
let closed = false;
stream.on('close', () => {
closed = true;

@@ -40,3 +36,3 @@ });

writable: writing
}, function (err) {
}, err => {
if (err) return callback(err);

@@ -46,8 +42,9 @@ closed = true;

});
var destroyed = false;
return function (err) {
let destroyed = false;
return err => {
if (closed) return;
if (destroyed) return;
destroyed = true; // request.destroy just do .end - .abort is what we want
destroyed = true;
// request.destroy just do .end - .abort is what we want
if (isRequest(stream)) return stream.abort();

@@ -58,11 +55,8 @@ if (typeof stream.destroy === 'function') return stream.destroy();

}
function call(fn) {
fn();
}
function pipe(from, to) {
return from.pipe(to);
}
function popCallback(streams) {

@@ -73,3 +67,2 @@ if (!streams.length) return noop;

}
function pipeline() {

@@ -79,14 +72,11 @@ for (var _len = arguments.length, streams = new Array(_len), _key = 0; _key < _len; _key++) {

}
var callback = popCallback(streams);
const callback = popCallback(streams);
if (Array.isArray(streams[0])) streams = streams[0];
if (streams.length < 2) {
throw new ERR_MISSING_ARGS('streams');
}
var error;
var destroys = streams.map(function (stream, i) {
var reading = i < streams.length - 1;
var writing = i > 0;
let error;
const destroys = streams.map(function (stream, i) {
const reading = i < streams.length - 1;
const writing = i > 0;
return destroyer(stream, reading, writing, function (err) {

@@ -102,3 +92,2 @@ if (!error) error = err;

}
module.exports = pipeline;

17

lib/internal/streams/state.js
'use strict';
var ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
const ERR_INVALID_OPT_VALUE = require('../../../errors').codes.ERR_INVALID_OPT_VALUE;
function highWaterMarkFrom(options, isDuplex, duplexKey) {
return options.highWaterMark != null ? options.highWaterMark : isDuplex ? options[duplexKey] : null;
}
function getHighWaterMark(state, options, duplexKey, isDuplex) {
var hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
const hwm = highWaterMarkFrom(options, isDuplex, duplexKey);
if (hwm != null) {
if (!(isFinite(hwm) && Math.floor(hwm) === hwm) || hwm < 0) {
var name = isDuplex ? duplexKey : 'highWaterMark';
const name = isDuplex ? duplexKey : 'highWaterMark';
throw new ERR_INVALID_OPT_VALUE(name, hwm);
}
return Math.floor(hwm);
} // Default value
}
// Default value
return state.objectMode ? 16 : 16 * 1024;
}
module.exports = {
getHighWaterMark: getHighWaterMark
getHighWaterMark
};

2

package.json
{
"name": "readable-stream",
"version": "3.6.0",
"version": "3.6.1",
"description": "Streams3, a user-land copy of the stream library from Node.js",

@@ -5,0 +5,0 @@ "main": "readable.js",

2

README.md

@@ -18,3 +18,3 @@ # readable-stream

Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v10.19.0/docs/api/stream.html).
Full documentation may be found on the [Node.js website](https://nodejs.org/dist/v10.18.1/docs/api/stream.html).

@@ -21,0 +21,0 @@ If you want to guarantee a stable streams base, regardless of what version of

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