streamex

STREAM EXTENSIONS LIBRARAY

Copyright Vitaly Tomilin, 2015

StreamEx library contains two classes at the moment: LineStream and BufferStream, both being stream implementations.

LineStream is a stream.Transform implementation, which tokenizes input, written or piped to it into lines of text and then for each line emits data event. It can also be piped from.

    var LineStream = require('streamex').linestream,
        ls = new LineStream();

    ls.on('data', function(line) {
        console.log('Got some lines:', line);
    }).on('finish', function() {
        console.log('Done reading lines');
    }).on('error', function(error) {
        console.error('Error reading lines:', error);
    });

    process.stdin.pipe(ls);

BufferStream accumulates data, written to it in memory in a form of a Buffer object.

    var BufferStream = require('streamex').bufferstream,
        bs = new BufferStream();

     process.stdin.on('data', function() {
        console.log('Got', bs.length, 'bytes of data');
        // Data is available in bs.buffer
    });

    process.stdin.pipe(bs);

BufferStream.buffer provides a copy of data every time, retaining the original in the stream. To purge the original use BufferStream.toBuffer() instead.