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# end-of-stream A node module that calls a callback when a readable/writable/duplex stream has completed or failed. npm install end-of-stream [](https://travis-ci.org/mafintosh/end-of-stream) ## Usage Simply pass a stream and a callback to the `eos`. Both legacy streams, streams2 and stream3 are supported. ``` js var eos = require('end-of-stream'); eos(readableStream, function(err) { // this will be set to the stream instance if (err) return console.log('stream had an error or closed early'); console.log('stream has ended', this === readableStream); }); eos(writableStream, function(err) { if (err) return console.log('stream had an error or closed early'); console.log('stream has finished', this === writableStream); }); eos(duplexStream, function(err) { if (err) return console.log('stream had an error or closed early'); console.log('stream has ended and finished', this === duplexStream); }); eos(duplexStream, {readable:false}, function(err) { if (err) return console.log('stream had an error or closed early'); console.log('stream has finished but might still be readable'); }); eos(duplexStream, {writable:false}, function(err) { if (err) return console.log('stream had an error or closed early'); console.log('stream has ended but might still be writable'); }); eos(readableStream, {error:false}, function(err) { // do not treat emit('error', err) as a end-of-stream }); ``` ## License MIT ## Related `end-of-stream` is part of the [mississippi stream utility collection](https://github.com/maxogden/mississippi) which includes more useful stream modules similar to this one.