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When creating multiple .pipe()s to the same destination stream, the first source to end would close the destination, breaking all remaining pipes. This patch fixes the problem by keeping track of all open pipes, so that we only call end on destinations that have no more sources piping to them. closes #929
125 lines
3.0 KiB
JavaScript
125 lines
3.0 KiB
JavaScript
// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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var events = require('events');
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var util = require('util');
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function Stream() {
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events.EventEmitter.call(this);
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}
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util.inherits(Stream, events.EventEmitter);
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exports.Stream = Stream;
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var pipes = [];
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Stream.prototype.pipe = function(dest, options) {
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var source = this;
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pipes.push(dest);
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function ondata(chunk) {
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if (dest.writable) {
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if (false === dest.write(chunk)) source.pause();
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}
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}
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source.on('data', ondata);
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function ondrain() {
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if (source.readable) source.resume();
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}
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dest.on('drain', ondrain);
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/*
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* If the 'end' option is not supplied, dest.end() will be called when
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* source gets the 'end' event.
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*/
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if (!options || options.end !== false) {
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function onend() {
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var index = pipes.indexOf(dest);
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pipes.splice(index, 1);
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if (pipes.indexOf(dest) > -1) {
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return;
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}
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dest.end();
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}
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source.on('end', onend);
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source.on('close', onend);
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}
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/*
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* Questionable:
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*/
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if (!source.pause) {
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source.pause = function() {
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source.emit('pause');
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};
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}
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if (!source.resume) {
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source.resume = function() {
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source.emit('resume');
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};
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}
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var onpause = function() {
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source.pause();
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}
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dest.on('pause', onpause);
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var onresume = function() {
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if (source.readable) source.resume();
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};
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dest.on('resume', onresume);
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var cleanup = function () {
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source.removeListener('data', ondata);
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dest.removeListener('drain', ondrain);
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source.removeListener('end', onend);
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source.removeListener('close', onend);
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dest.removeListener('pause', onpause);
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dest.removeListener('resume', onresume);
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source.removeListener('end', cleanup);
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source.removeListener('close', cleanup);
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dest.removeListener('end', cleanup);
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dest.removeListener('close', cleanup);
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}
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source.on('end', cleanup);
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source.on('close', cleanup);
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dest.on('end', cleanup);
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dest.on('close', cleanup);
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dest.emit('pipe', source);
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};
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