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WebSocket emulation - Erlang server
Erlang

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README.md

SockJS family:

SockJS-erlang

Erlang-based server side component for SockJS. Can run on Cowboy or Misultin.

See https://github.com/sockjs/sockjs-client for more information on SockJS.

Currently this is somewhat limited:

  • A couple of header-based things haven't been ported from the node server
  • Hasn't been tested much
  • Hasn't been performance-tested at all

Hopefully in future some of these restrictions will get improved.

See the sockjs_test module for what passes for usage examples.

Some useful application configuration parameters:

  • sockjs_url - path to the sockjs library as seen by the client
    • default: "/lib/sockjs.js"
  • heartbeat_ms - milliseconds between heartbeat frames
    • default: 25000
  • session_close_ms - milliseconds to keep a session alive after a client connection goes away
    • default: 5000
  • json_impl - JSON library to use, mochijson2 or eep0018
    • default: mochijson2

[Note that the tests test that you can send unicode strings containing \0. When using eep0018 you can't; it strips them out. So a few tests will fail.]

Development

To run tests you need to have node and coffee-script installed

cd sockjs-erlang
npm install coffee-script

Now you're ready to run test server, if you want to use cowboy:

make test

Or misultin:

make test HTTP=misultin
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