primus-responder

Request-Response ortiented communication for websockets with Primus.

Primus Responder

Client and server plugin that adds a request/response cycle to Primus.

$ npm install primus-responder --save
  • Wrap existing REST API into a realtime websocket connection
  • Simplify program flow if waiting on a specific response is needed
var Primus = require('primus')
    , PrimusResponder = require('primus-responder')
    , server = require('http').createServer()
    , options = { transformer: 'websockets' }
    , primus = new Primus(server, options);
 
primus.use('responder', PrimusResponder);
 
primus.on('connection', function(spark) {
 
    // Handle incoming requests: 
    spark.on('request', function(datadone) {
        // Echo the received request data 
        done(data);
    });
 
    // Request a response from the spark: 
    spark.writeAndWait('request from server', function(response) {
        // Write the sparks response to console 
        console.log('Reponse from spark:' response);
    });
 
});
 
server.listen(8080);
var primus = Primus.connect('ws://localhost:8080');
 
// Handle incoming requests: 
primus.on('request', function(datadone) {
    // Echo the received request data 
    done(data);
});
 
// Request a response from the server: 
primus.writeAndWait('request from client', function(response) {
    // Write the servers response to console 
    console.log('Response from server:', response);
});

Registers an event handler for incoming requests. The handler has two arguments: fn(data, done)

  • data contains the data which was sent with the request
  • done is a callback function. First and only argument contains the data you want to transmit.
spark.on('request', function(datadone) {
    done('this is the response');
});

Sends data to the given spark. As soon as the response from the spark arrives, fn is called with the sparks response as first and only argument.

spark.writeAndWait('request data', function(response) {
    console.log('spark responded:', response);
});

Registers an event handler for incoming requests. The handler has two arguments: fn(data, done)

  • data contains the data which was sent with the request
  • done is a callback function. First and only argument contains the data you want to transmit.
primus.on('request', function(datadone) {
    done('this is the response');
});

Sends data to the connected server. As soon as the response arrives, fn is called with the servers response as first and only argument.

primus.writeAndWait('request data', function(response) {
    console.log('server responded:', response);
});
$ npm test
  • http://alabor.me/articles/request-response-oriented-websockets/

Copyright (c) 2013 Manuel Alabor

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:

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