Index: frontend/node_modules/combined-stream/License =================================================================== --- frontend/node_modules/combined-stream/License (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/combined-stream/License (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,19 @@ +Copyright (c) 2011 Debuggable Limited + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +THE SOFTWARE. Index: frontend/node_modules/combined-stream/Readme.md =================================================================== --- frontend/node_modules/combined-stream/Readme.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/combined-stream/Readme.md (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,138 @@ +# combined-stream + +A stream that emits multiple other streams one after another. + +**NB** Currently `combined-stream` works with streams version 1 only. There is ongoing effort to switch this library to streams version 2. Any help is welcome. :) Meanwhile you can explore other libraries that provide streams2 support with more or less compatibility with `combined-stream`. + +- [combined-stream2](https://www.npmjs.com/package/combined-stream2): A drop-in streams2-compatible replacement for the combined-stream module. + +- [multistream](https://www.npmjs.com/package/multistream): A stream that emits multiple other streams one after another. + +## Installation + +``` bash +npm install combined-stream +``` + +## Usage + +Here is a simple example that shows how you can use combined-stream to combine +two files into one: + +``` javascript +var CombinedStream = require('combined-stream'); +var fs = require('fs'); + +var combinedStream = CombinedStream.create(); +combinedStream.append(fs.createReadStream('file1.txt')); +combinedStream.append(fs.createReadStream('file2.txt')); + +combinedStream.pipe(fs.createWriteStream('combined.txt')); +``` + +While the example above works great, it will pause all source streams until +they are needed. If you don't want that to happen, you can set `pauseStreams` +to `false`: + +``` javascript +var CombinedStream = require('combined-stream'); +var fs = require('fs'); + +var combinedStream = CombinedStream.create({pauseStreams: false}); +combinedStream.append(fs.createReadStream('file1.txt')); +combinedStream.append(fs.createReadStream('file2.txt')); + +combinedStream.pipe(fs.createWriteStream('combined.txt')); +``` + +However, what if you don't have all the source streams yet, or you don't want +to allocate the resources (file descriptors, memory, etc.) for them right away? +Well, in that case you can simply provide a callback that supplies the stream +by calling a `next()` function: + +``` javascript +var CombinedStream = require('combined-stream'); +var fs = require('fs'); + +var combinedStream = CombinedStream.create(); +combinedStream.append(function(next) { + next(fs.createReadStream('file1.txt')); +}); +combinedStream.append(function(next) { + next(fs.createReadStream('file2.txt')); +}); + +combinedStream.pipe(fs.createWriteStream('combined.txt')); +``` + +## API + +### CombinedStream.create([options]) + +Returns a new combined stream object. Available options are: + +* `maxDataSize` +* `pauseStreams` + +The effect of those options is described below. + +### combinedStream.pauseStreams = `true` + +Whether to apply back pressure to the underlaying streams. If set to `false`, +the underlaying streams will never be paused. If set to `true`, the +underlaying streams will be paused right after being appended, as well as when +`delayedStream.pipe()` wants to throttle. + +### combinedStream.maxDataSize = `2 * 1024 * 1024` + +The maximum amount of bytes (or characters) to buffer for all source streams. +If this value is exceeded, `combinedStream` emits an `'error'` event. + +### combinedStream.dataSize = `0` + +The amount of bytes (or characters) currently buffered by `combinedStream`. + +### combinedStream.append(stream) + +Appends the given `stream` to the combinedStream object. If `pauseStreams` is +set to `true, this stream will also be paused right away. + +`streams` can also be a function that takes one parameter called `next`. `next` +is a function that must be invoked in order to provide the `next` stream, see +example above. + +Regardless of how the `stream` is appended, combined-stream always attaches an +`'error'` listener to it, so you don't have to do that manually. + +Special case: `stream` can also be a String or Buffer. + +### combinedStream.write(data) + +You should not call this, `combinedStream` takes care of piping the appended +streams into itself for you. + +### combinedStream.resume() + +Causes `combinedStream` to start drain the streams it manages. The function is +idempotent, and also emits a `'resume'` event each time which usually goes to +the stream that is currently being drained. + +### combinedStream.pause(); + +If `combinedStream.pauseStreams` is set to `false`, this does nothing. +Otherwise a `'pause'` event is emitted, this goes to the stream that is +currently being drained, so you can use it to apply back pressure. + +### combinedStream.end(); + +Sets `combinedStream.writable` to false, emits an `'end'` event, and removes +all streams from the queue. + +### combinedStream.destroy(); + +Same as `combinedStream.end()`, except it emits a `'close'` event instead of +`'end'`. + +## License + +combined-stream is licensed under the MIT license. Index: frontend/node_modules/combined-stream/lib/combined_stream.js =================================================================== --- frontend/node_modules/combined-stream/lib/combined_stream.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/combined-stream/lib/combined_stream.js (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,208 @@ +var util = require('util'); +var Stream = require('stream').Stream; +var DelayedStream = require('delayed-stream'); + +module.exports = CombinedStream; +function CombinedStream() { + this.writable = false; + this.readable = true; + this.dataSize = 0; + this.maxDataSize = 2 * 1024 * 1024; + this.pauseStreams = true; + + this._released = false; + this._streams = []; + this._currentStream = null; + this._insideLoop = false; + this._pendingNext = false; +} +util.inherits(CombinedStream, Stream); + +CombinedStream.create = function(options) { + var combinedStream = new this(); + + options = options || {}; + for (var option in options) { + combinedStream[option] = options[option]; + } + + return combinedStream; +}; + +CombinedStream.isStreamLike = function(stream) { + return (typeof stream !== 'function') + && (typeof stream !== 'string') + && (typeof stream !== 'boolean') + && (typeof stream !== 'number') + && (!Buffer.isBuffer(stream)); +}; + +CombinedStream.prototype.append = function(stream) { + var isStreamLike = CombinedStream.isStreamLike(stream); + + if (isStreamLike) { + if (!(stream instanceof DelayedStream)) { + var newStream = DelayedStream.create(stream, { + maxDataSize: Infinity, + pauseStream: this.pauseStreams, + }); + stream.on('data', this._checkDataSize.bind(this)); + stream = newStream; + } + + this._handleErrors(stream); + + if (this.pauseStreams) { + stream.pause(); + } + } + + this._streams.push(stream); + return this; +}; + +CombinedStream.prototype.pipe = function(dest, options) { + Stream.prototype.pipe.call(this, dest, options); + this.resume(); + return dest; +}; + +CombinedStream.prototype._getNext = function() { + this._currentStream = null; + + if (this._insideLoop) { + this._pendingNext = true; + return; // defer call + } + + this._insideLoop = true; + try { + do { + this._pendingNext = false; + this._realGetNext(); + } while (this._pendingNext); + } finally { + this._insideLoop = false; + } +}; + +CombinedStream.prototype._realGetNext = function() { + var stream = this._streams.shift(); + + + if (typeof stream == 'undefined') { + this.end(); + return; + } + + if (typeof stream !== 'function') { + this._pipeNext(stream); + return; + } + + var getStream = stream; + getStream(function(stream) { + var isStreamLike = CombinedStream.isStreamLike(stream); + if (isStreamLike) { + stream.on('data', this._checkDataSize.bind(this)); + this._handleErrors(stream); + } + + this._pipeNext(stream); + }.bind(this)); +}; + +CombinedStream.prototype._pipeNext = function(stream) { + this._currentStream = stream; + + var isStreamLike = CombinedStream.isStreamLike(stream); + if (isStreamLike) { + stream.on('end', this._getNext.bind(this)); + stream.pipe(this, {end: false}); + return; + } + + var value = stream; + this.write(value); + this._getNext(); +}; + +CombinedStream.prototype._handleErrors = function(stream) { + var self = this; + stream.on('error', function(err) { + self._emitError(err); + }); +}; + +CombinedStream.prototype.write = function(data) { + this.emit('data', data); +}; + +CombinedStream.prototype.pause = function() { + if (!this.pauseStreams) { + return; + } + + if(this.pauseStreams && this._currentStream && typeof(this._currentStream.pause) == 'function') this._currentStream.pause(); + this.emit('pause'); +}; + +CombinedStream.prototype.resume = function() { + if (!this._released) { + this._released = true; + this.writable = true; + this._getNext(); + } + + if(this.pauseStreams && this._currentStream && typeof(this._currentStream.resume) == 'function') this._currentStream.resume(); + this.emit('resume'); +}; + +CombinedStream.prototype.end = function() { + this._reset(); + this.emit('end'); +}; + +CombinedStream.prototype.destroy = function() { + this._reset(); + this.emit('close'); +}; + +CombinedStream.prototype._reset = function() { + this.writable = false; + this._streams = []; + this._currentStream = null; +}; + +CombinedStream.prototype._checkDataSize = function() { + this._updateDataSize(); + if (this.dataSize <= this.maxDataSize) { + return; + } + + var message = + 'DelayedStream#maxDataSize of ' + this.maxDataSize + ' bytes exceeded.'; + this._emitError(new Error(message)); +}; + +CombinedStream.prototype._updateDataSize = function() { + this.dataSize = 0; + + var self = this; + this._streams.forEach(function(stream) { + if (!stream.dataSize) { + return; + } + + self.dataSize += stream.dataSize; + }); + + if (this._currentStream && this._currentStream.dataSize) { + this.dataSize += this._currentStream.dataSize; + } +}; + +CombinedStream.prototype._emitError = function(err) { + this._reset(); + this.emit('error', err); +}; Index: frontend/node_modules/combined-stream/package.json =================================================================== --- frontend/node_modules/combined-stream/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/combined-stream/package.json (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,25 @@ +{ + "author": "Felix Geisendörfer (http://debuggable.com/)", + "name": "combined-stream", + "description": "A stream that emits multiple other streams one after another.", + "version": "1.0.8", + "homepage": "https://github.com/felixge/node-combined-stream", + "repository": { + "type": "git", + "url": "git://github.com/felixge/node-combined-stream.git" + }, + "main": "./lib/combined_stream", + "scripts": { + "test": "node test/run.js" + }, + "engines": { + "node": ">= 0.8" + }, + "dependencies": { + "delayed-stream": "~1.0.0" + }, + "devDependencies": { + "far": "~0.0.7" + }, + "license": "MIT" +} Index: frontend/node_modules/combined-stream/yarn.lock =================================================================== --- frontend/node_modules/combined-stream/yarn.lock (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) +++ frontend/node_modules/combined-stream/yarn.lock (revision 9af201e94b5a79beb92a30858fc54de4bc3b9449) @@ -0,0 +1,17 @@ +# THIS IS AN AUTOGENERATED FILE. DO NOT EDIT THIS FILE DIRECTLY. +# yarn lockfile v1 + + +delayed-stream@~1.0.0: + version "1.0.0" + resolved "https://registry.yarnpkg.com/delayed-stream/-/delayed-stream-1.0.0.tgz#df3ae199acadfb7d440aaae0b29e2272b24ec619" + +far@~0.0.7: + version "0.0.7" + resolved "https://registry.yarnpkg.com/far/-/far-0.0.7.tgz#01c1fd362bcd26ce9cf161af3938aa34619f79a7" + dependencies: + oop "0.0.3" + +oop@0.0.3: + version "0.0.3" + resolved "https://registry.yarnpkg.com/oop/-/oop-0.0.3.tgz#70fa405a5650891a194fdc82ca68dad6dabf4401"