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Many of the util.is*() methods used to check data types simply compare against a single value or the result of typeof. This commit replaces calls to these methods with equivalent checks. This commit does not touch calls to the more complex methods (isRegExp(), isDate(), etc.). Fixes: https://github.com/iojs/io.js/issues/607 PR-URL: https://github.com/iojs/io.js/pull/647 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
109 lines
2.4 KiB
JavaScript
109 lines
2.4 KiB
JavaScript
'use strict';
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module.exports = Stream;
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const EE = require('events').EventEmitter;
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const util = require('util');
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util.inherits(Stream, EE);
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Stream.Readable = require('_stream_readable');
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Stream.Writable = require('_stream_writable');
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Stream.Duplex = require('_stream_duplex');
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Stream.Transform = require('_stream_transform');
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Stream.PassThrough = require('_stream_passthrough');
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// Backwards-compat with node 0.4.x
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Stream.Stream = Stream;
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// old-style streams. Note that the pipe method (the only relevant
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// part of this class) is overridden in the Readable class.
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function Stream() {
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EE.call(this);
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}
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Stream.prototype.pipe = function(dest, options) {
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var source = this;
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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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source.pause();
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}
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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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source.resume();
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}
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}
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dest.on('drain', ondrain);
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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' or 'close' events. Only dest.end() once.
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if (!dest._isStdio && (!options || options.end !== false)) {
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source.on('end', onend);
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source.on('close', onclose);
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}
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var didOnEnd = false;
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function onend() {
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if (didOnEnd) return;
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didOnEnd = true;
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dest.end();
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}
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function onclose() {
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if (didOnEnd) return;
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didOnEnd = true;
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if (typeof dest.destroy === 'function') dest.destroy();
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}
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// don't leave dangling pipes when there are errors.
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function onerror(er) {
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cleanup();
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if (EE.listenerCount(this, 'error') === 0) {
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throw er; // Unhandled stream error in pipe.
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}
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}
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source.on('error', onerror);
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dest.on('error', onerror);
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// remove all the event listeners that were added.
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function cleanup() {
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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', onclose);
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source.removeListener('error', onerror);
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dest.removeListener('error', onerror);
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source.removeListener('end', cleanup);
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source.removeListener('close', 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('close', cleanup);
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dest.emit('pipe', source);
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// Allow for unix-like usage: A.pipe(B).pipe(C)
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return dest;
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};
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