mirror of https://gitee.com/openkylin/nodejs.git
48 lines
1.7 KiB
JavaScript
48 lines
1.7 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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// a passthrough stream.
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// basically just the most minimal sort of Transform stream.
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// Every written chunk gets output as-is.
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'use strict';
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const {
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ObjectSetPrototypeOf,
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} = primordials;
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module.exports = PassThrough;
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const Transform = require('_stream_transform');
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ObjectSetPrototypeOf(PassThrough.prototype, Transform.prototype);
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ObjectSetPrototypeOf(PassThrough, Transform);
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function PassThrough(options) {
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if (!(this instanceof PassThrough))
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return new PassThrough(options);
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Transform.call(this, options);
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}
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PassThrough.prototype._transform = function(chunk, encoding, cb) {
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cb(null, chunk);
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};
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