@socket-mesh/server
v18.1.4
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A TCP socket pair for easily transmitting full messages without worrying about request size limits.
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SocketMesh server
Minimal server module for SocketMesh.
This is a stand-alone server module for SocketMesh. 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
- Clone this repo:
git clone [email protected]:SocketCluster/socketcluster-server.git
- Navigate to project directory:
cd socketcluster-server
- Install all dependencies:
npm install
- Run the tests:
npm test
Benefits of async Iterable
over EventEmitter
- More readable: Code is written sequentially from top to bottom. It avoids event handler callback hell. It's also much easier to write and read complex integration test scenarios.
- More succinct: Event streams can be easily chained, filtered and combined using a declarative syntax (e.g. using async generators).
- More manageable: No need to remember to unbind listeners with
removeListener(...)
; justbreak
out of thefor-await-of
loop to stop consuming. This also encourages a more declarative style of coding which reduces the likelihood of memory leaks and unintended side effects. - Less error-prone: Each event/RPC/message can be processed sequentially in the same order that they were sent without missing any data; even if asynchronous calls are made inside plugin or listeners. On the other hand, with
EventEmitter
, the listener function for the same event cannot be prevented from running multiple times in parallel; also, asynchronous calls within plugin and listeners can affect the final order of actions; all this can cause unintended side effects.
License
(The MIT License)
Copyright (c) 2013-2024 SocketMesh.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.