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; } 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; 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); };
# | Change | User | Description | Committed | |
---|---|---|---|---|---|
#1 | 19553 | swellard | Move and rename clients | ||
//guest/perforce_software/helix-web-services/main/source/clients/2016.1.0/javascript/node_modules/combined-stream/lib/combined_stream.js | |||||
#1 | 18810 | tjuricek |
First-pass at JavaScript client SDK. JavaScript requires Node with Gulp to "browserfy" the library. It's the easiest way I found to use the swagger-js project; bundle up a wrapping method. There is no JavaScript reference guide. The swagger-js doesn't really document what they do very well, actually. Overall I'm not particularly impressed by swagger-js, it was hard to even figure out what the right method syntax was. We may want to invest time in doing it better. This required setting CORS response headers, which are currently defaulted to a fairly insecure setting. |