http2

node-http2

An HTTP/2 server implementation for node.js, developed as a [Google Summer of Code project] (https://google-melange.appspot.com/gsoc/project/google/gsoc2013/molnarg/5001).

Installation

npm install http2

API

The API is very similar to the standard node.js HTTPS API. The goal is the perfect API compatibility, with additional HTTP2 related extensions (like server push).

Detailed API documentation is primarily maintained in the lib/http.js file and is available in the wiki as well.

Examples

Using as a server

var http2 = require('http2');

var options = {
  key: fs.readFileSync('./example/localhost.key'),
  cert: fs.readFileSync('./example/localhost.crt')
};

http2.createServer(options, function(request, response) {
  response.end('Hello world!');
}).listen(8080);

Using as a client

var http2 = require('http2');

process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";

var request = http2.get('https://gabor.molnar.es:8080/');

request.on('response', function(response) {
  response.pipe(process.stdout);
});

Simple static file server

An simple static file server serving up content from its own directory is available in the example directory. Running the server:

$ node ./example/server.js
Listening on localhost:8080, serving up files from ./example

Simple command line client

An example client is also available. Downloading the server's own source code from the server:

$ node ./example/client.js 'https://localhost:8080/server.js' 2>/tmp/server.js

Server push

For a server push example, see the source code of the example server and client.

Status

I post weekly status updates on my blog. Short version: main missing items are:

• prioritization (issue #19 and #20)
• ALPN support for negotiating HTTP/2 over TLS (it's done with NPN for now) (issue #5)
• Upgrade mechanism to start HTTP/2 over unencrypted channel (issue #4)

Development

Development dependencies

There's a few library you will need to have installed to do anything described in the following sections. After installing/cloning node-http2, run npm install in its directory to install development dependencies.

Used libraries:

• mocha for tests
• chai for assertions
• istanbul for code coverage analysis
• docco for developer documentation
• bunyan for logging

For pretty printing logs, you will also need a global install of bunyan (npm install -g bunyan).

Developer documentation

The developer documentation is located in the doc directory. The docs are usually updated only before releasing a new version. To regenerate them manually, run npm run-script prepublish. There's a hosted version which is located here.

Running the tests

It's easy, just run npm test. The tests are written in BDD style, so they are a good starting point to understand the code.

Test coverage

To generate a code coverage report, run npm test --coverage (which runs very slowly, be patient). Code coverage summary as of version 0.2.0:

Statements   : 85.04% ( 1177/1384 )
Branches     : 70.21% ( 370/527 )
Functions    : 83.94% ( 162/193 )
Lines        : 85.31% ( 1173/1375 )

There's a hosted version of the detailed (line-by-line) coverage report here.

Logging

Logging is turned off by default. To turn it on, set the HTTP2_LOG environment variable to fatal, error, warn, info, debug or trace (the logging level). Log output is in JSON format, and can be pretty printed using the bunyan command line tool.

For example, running the test client with debug level logging output:

HTTP2_LOG=debug node ./example/client.js 'http://localhost:8080/server.js' 2>/tmp/server.js | bunyan

Contributors

Code contributions are always welcome! People who contributed to node-http2 so far:

• Nick Hurley
• Mike Belshe

Special thanks to Google for financing the development of this module as part of their Summer of Code program, and Nick Hurley of Mozilla, my GSoC mentor, who helps with regular code review and technical advices.

License

The MIT License

Copyright (C) 2013 Gábor Molnár gabor@molnar.es