2 streams:
Given readable streams stream1
and stream2
, what's an idiomatic (concise) way to get a stream containing stream1
and stream2
concatenated?
I cannot do stream1.pipe(outStream); stream2.pipe(outStream)
, because then the stream contents are jumbled together.
n streams:
Given an EventEmitter that emits an indeterminate number of streams, e.g.
eventEmitter.emit('stream', stream1)
eventEmitter.emit('stream', stream2)
eventEmitter.emit('stream', stream3)
...
eventEmitter.emit('end')
what's an idiomatic (concise) way to get a stream with all streams concatenated together?
The combined-stream package concatenates streams. Example from the README:
var CombinedStream = require('combined-stream');
var fs = require('fs');
var combinedStream = CombinedStream.create();
combinedStream.append(fs.createReadStream('file1.txt'));
combinedStream.append(fs.createReadStream('file2.txt'));
combinedStream.pipe(fs.createWriteStream('combined.txt'));
I believe you have to append all streams at once. If the queue runs empty, the combinedStream
automatically ends. See issue #5.
The stream-stream library is an alternative that has an explicit .end
, but it's much less popular and presumably not as well-tested. It uses the streams2 API of Node 0.10 (see this discussion).