92 lines
2.9 KiB
Markdown
92 lines
2.9 KiB
Markdown
# reduplexer(writable, readable, options)
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[![build status][1]][2]
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Takes a [`Writable`][5] stream and a [`Readable`][4] stream and makes them appear as a `Duplex` stream.
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Heavily inspired by [duplexer](http://npm.im/duplexer) but using Stream2
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with a bundled [readable-stream](http://npm.im/readable-stream).
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It is assumed that the two streams are connected to each other in some way.
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## Example
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```js
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var cp = require('child_process')
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, duplexer = require('reduplexer')
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, grep = cp.exec('grep Stream')
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duplexer(grep.stdin, grep.stdout, { objectMode: true })
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```
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## Installation
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`npm install reduplexer --save`
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## API
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* <a href="#reduplexer"><code><b>reduplexer()</b></code></a>
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* <a href="#hookWritable"><code>duplex.<b>hookWritable()</b></code></a>
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* <a href="#hookReadable"><code>duplex.<b>hookReadable()</b></code></a>
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* <a href="#hook"><code>duplex.<b>hook()</b></code></a>
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-------------------------------------------------------
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<a name="reduplexer"></a>
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### reduplexer(writable, readable, options)
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Create a [`Duplex`][3] stream based on `writable` and `readable` using
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the given options.
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`writable` and `readable` can be null, and in that case they can be
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'hooked' later.
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-------------------------------------------------------
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<a name="hookWritable"></a>
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### duplex.hookWritable(writable)
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Hooks a `Writable` stream. It will throw if a `Writable` is already hooked.
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-------------------------------------------------------
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<a name="hookReadable"></a>
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### duplex.hookReadable(writable)
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Hooks a `Readable` stream. It will throw if a `Readable` stream is already hooked.
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-------------------------------------------------------
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<a name="hook"></a>
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### duplex.hook(writable, readable)
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Shortcut for:
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```js
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duplex.hookWritable(writable)
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duplex.hookReadable(readable)
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```
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But it will not throw if any of the two are missing.
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## Tests
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`npm test`
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## License
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Copyright (c) 2014, Matteo Collina <hello@matteocollina.com>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR
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IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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[1]: https://secure.travis-ci.org/mcollina/reduplexer.png
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[2]: https://travis-ci.org/mcollina/reduplexer
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[3]: http://nodejs.org/api/stream.html#stream_class_stream_duplex
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[4]: http://nodejs.org/api/stream.html#stream_class_stream_readable
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[5]: http://nodejs.org/api/stream.html#stream_class_stream_writable
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