duplexer2

0.1.4last stable release 9 years ago
Complexity Score
Low
Open Issues
7
Dependent Projects
229
Weekly Downloadsglobal
7,677,725

License

  • BSD-3-Clause
    • Yesattribution
    • Permissivelinking
    • Permissivedistribution
    • Permissivemodification
    • Nopatent grant
    • Yesprivate use
    • Permissivesublicensing
    • Notrademark grant

Downloads

Readme

duplexer2

Like duplexer but using Streams3

var stream = require("stream");

var duplexer2 = require("duplexer2");

var writable = new stream.Writable({objectMode: true}),
    readable = new stream.Readable({objectMode: true});

writable._write = function _write(input, encoding, done) {
  if (readable.push(input)) {
    return done();
  } else {
    readable.once("drain", done);
  }
};

readable._read = function _read(n) {
  // no-op
};

// simulate the readable thing closing after a bit
writable.once("finish", function() {
  setTimeout(function() {
    readable.push(null);
  }, 500);
});

var duplex = duplexer2(writable, readable);

duplex.on("data", function(e) {
  console.log("got data", JSON.stringify(e));
});

duplex.on("finish", function() {
  console.log("got finish event");
});

duplex.on("end", function() {
  console.log("got end event");
});

duplex.write("oh, hi there", function() {
  console.log("finished writing");
});

duplex.end(function() {
  console.log("finished ending");
});
got data "oh, hi there"
finished writing
got finish event
finished ending
got end event

Overview

This is a reimplementation of duplexer using the Streams3 API which is standard in Node as of v4. Everything largely works the same.

Installation

Available via npm:

$ npm i duplexer2

API

duplexer2

Creates a new DuplexWrapper object, which is the actual class that implements most of the fun stuff. All that fun stuff is hidden. DON’T LOOK.

duplexer2([options], writable, readable)
const duplex = duplexer2(new stream.Writable(), new stream.Readable());

Arguments

  • options - an object specifying the regular stream.Duplex options, as well as the properties described below.
  • writable - a writable stream
  • readable - a readable stream

Options

  • bubbleErrors - a boolean value that specifies whether to bubble errors from the underlying readable/writable streams. Default is true.

License

3-clause BSD. A copy is included with the source.

Contact

  • GitHub (deoxxa)
  • Twitter (@deoxxa)
  • Email (deoxxa@fknsrs.biz)

Dependencies

CVE IssuesActive
0
Scorecards Score
3.00
Test Coverage
95.00%
Follows Semver
Yes
Github Stars
72
Dependenciestotal
2
DependenciesOutdated
2
DependenciesDeprecated
0
Threat Modelling
No
Repo Audits
No

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