mirror of https://github.com/layui/layui
51 lines
2.2 KiB
Markdown
51 lines
2.2 KiB
Markdown
# BufferStreams
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[](https://npmjs.org/package/bufferstreams) [](https://travis-ci.org/nfroidure/BufferStreams) [](https://david-dm.org/nfroidure/bufferstreams) [](https://david-dm.org/nfroidure/bufferstreams#info=devDependencies) [](https://coveralls.io/r/nfroidure/BufferStreams?branch=master) [](https://codeclimate.com/github/nfroidure/BufferStreams)
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BufferStreams abstracts streams to allow you to deal with their whole content in
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a single buffer when it becomes necessary (by example: a legacy library that
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do not support streams).
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It is not a good practice, just some glue. Using BufferStreams means:
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* there is no library dealing with streams for your needs
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* you filled an issue to the wrapped library to support streams
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## Usage
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Install the [npm module](https://npmjs.org/package/bufferstreams):
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```sh
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npm install bufferstreams --save
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```
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Then, in your scripts:
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```js
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var BufferStreams = require('bufferstreams');
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Fs.createReadStream('input.txt')
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.pipe(new BufferStreams(function(err, buf, cb) {
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// err will be filled with an error if the piped in stream emits one.
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if(err) {
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throw err;
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}
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// buf will contain the whole piped in stream contents
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buf = Buffer(buf.toString('utf-8').replace('foo', 'bar'));
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// cb is a callback to pass the result back to the piped out stream
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// first argument is an error that will be emitted if any
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// the second argument is the modified buffer
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cb(null, buf);
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}))
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.pipe(Fs.createWriteStream('output.txt'));
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```
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Note that you can use BufferStream with the objectMode option. In this case, the
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given buffer will be an array containing the streamed objects:
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```js
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new BufferStreams({objectMode: true}, myCallback);
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```
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## Contributing
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Feel free to pull your code if you agree with publishing it under the MIT license.
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