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buffer-peek-stream
Advanced tools
Transform stream that lets you inspect the start of a readable stream before deciding what to do with it
Take a peek at the start of a stream and get back a new stream rewound from the start without buffering the entire stream. Useful when you need to inspect the start of the stream before deciding what to do with the stream.
npm install buffer-peek-stream
Useful if you want to inspect the start of a stream before deciding what to do with it.
This works with buffers and does no string decoding. If you know you have a string and already know its encoding then checkout peek-stream.
As a promise (with await)...
const peek = require('buffer-peek-stream').promise;
const readstream = fs.createReadStream('package.json');
const [data, outputStream] = await peek(readstream, 65536);
// outputStream is ready to be piped somewhere else
outputStream.pipe(somewhere_else);
As a callback...
var peek = require('buffer-peek-stream');
var readstream = fs.createReadStream('package.json');
peek(readstream, 65536, function (err, data, outputStream) {
if (err) throw err;
// outputStream is ready to be piped somewhere else
outputStream.pipe(somewhere_else);
});
As a stream...
var PeekStream = require('buffer-peek-stream').BufferPeekStream;
var peek = new PeekStream(65536);
var readstream = fs.createReadStream('package.json');
// peek will only emit the peek event once
peek.once('peek', function (buf) {
// readstream is ready to be piped somewhere else
peek.pipe(somewhere_else);
});
readstream.pipe(peek);
// alternatively pipe `peek` here instead of in `data` callback
MIT
1.1.0 (2020/02/02)
FAQs
Transform stream that lets you inspect the start of a readable stream before deciding what to do with it
The npm package buffer-peek-stream receives a total of 24,085 weekly downloads. As such, buffer-peek-stream popularity was classified as popular.
We found that buffer-peek-stream demonstrated a not healthy version release cadence and project activity because the last version was released a year ago. It has 2 open source maintainers collaborating on the project.
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