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SocketCluster server

Minimal server module for SocketCluster.

This is a stand-alone server module for SocketCluster. SocketCluster's protocol is backwards compatible with the SocketCluster protocol.

Setting up

You will need to install both socketcluster-server and socketcluster-client (https://github.com/SocketCluster/socketcluster-client).

To install this module:

npm install socketcluster-server

Usage

You need to attach it to an existing Node.js http or https server (example):

const http = require('http');
const socketClusterServer = require('socketcluster-server');

let httpServer = http.createServer();
let agServer = socketClusterServer.attach(httpServer);

(async () => {
  // Handle new inbound sockets.
  for await (let {socket} of agServer.listener('connection')) {

    (async () => {
      // Set up a loop to handle and respond to RPCs for a procedure.
      for await (let req of socket.procedure('customProc')) {
        if (req.data.bad) {
          let error = new Error('Server failed to execute the procedure');
          error.name = 'BadCustomError';
          req.error(error);
        } else {
          req.end('Success');
        }
      }
    })();

    (async () => {
      // Set up a loop to handle remote transmitted events.
      for await (let data of socket.receiver('customRemoteEvent')) {
        // ...
      }
    })();

  }
})();

httpServer.listen(8000);

For more detailed examples of how to use SocketCluster, see test/integration.js. Also, see tests from the socketcluster-client module.

SocketCluster can work without the for-await-of loop; a while loop with await statements can be used instead. See https://github.com/SocketCluster/stream-demux#usage

Compatibility mode

For compatibility with existing SocketCluster clients, set the protocolVersion to 1 and make sure that the path matches your old client path:

let agServer = socketClusterServer.attach(httpServer, {
  protocolVersion: 1,
  path: '/socketcluster/'
});

Running the tests

Benefits of async Iterable over EventEmitter

License

(The MIT License)

Copyright (c) 2013-2023 SocketCluster.io

Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the 'Software'), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.