node-jsonrpc2

JSON-RPC 2.0 server and client library, with HTTP (with Websocket support) and TCP endpoints

This fork is a rewrite with proper testing framework, linted code, compatible with node 0.8.x and 0.10.x, class inheritance, and added functionalities

Tools

Check jsonrpc2-tools for some nice additions to this module.

Install

To install node-jsonrpc2 in the current directory, run:

npm install json-rpc2 --save

Changes from 1.x

• Uses native EventEmitter instead of EventEmitter3

Changes from 0.x

• Before, the id member was permissive and wouldn't actually adhere to the RFC, allowing anything besides undefined.
• If your application relied on weird id constructs other than String, Number or null, it might break if you update to 1.x

Usage

Firing up an efficient JSON-RPC server becomes extremely simple:

varrpc=require('json-rpc2');varserver=rpc.Server.$create({'websocket': true,// is true by default'headers': {// allow custom headers is empty by default'Access-Control-Allow-Origin': '*'}});functionadd(args,opt,callback){callback(null,args[0]+args[1]);}server.expose('add',add);// you can expose an entire object as well:server.expose('namespace',{'function1': function(){},'function2': function(){},'function3': function(){}});// expects calls to be namespace.function1, namespace.function2 and namespace.function3// listen creates an HTTP server on localhost onlyserver.listen(8000,'localhost');

And creating a client to speak to that server is easy too:

varrpc=require('json-rpc2');varclient=rpc.Client.$create(8000,'localhost');// Call add function on the serverclient.call('add',[1,2],function(err,result){console.log('1 + 2 = '+result);});

Create a raw (socket) server using:

varrpc=require('json-rpc2');varserver=rpc.Server.$create();// non-standard auth for RPC, when using this module using both client and server, works out-of-the-boxserver.enableAuth('user','pass');// Listen on socketserver.listenRaw(8080,'localhost');

Extend, overwrite, overload

Any class can be extended, or used as a mixin for new classes, since it uses ES5Class module.

For example, you may extend the Endpoint class, that automatically extends Client and Server classes. Extending Connection automatically extends SocketConnection and HttpServerConnection.

varrpc=require('json-rpc2');rpc.Endpoint.$include({'newFunction': function(){}});varserver=rpc.Server.$create(),client=rpc.Client.$create();server.newFunction();// already availableclient.newFunction();// already available

To implement a new class method (that can be called without an instance, like rpc.Endpoint.newFunction):

varrpc=require('json-rpc2');rpc.Endpoint.$implement({'newFunction': function(){}});rpc.Endpoint.newFunction();// availablerpc.Client.newFunction();// everyrpc.Server.newFunction();// where

Don't forget, when you are overloading an existing function, you can call the original function using $super

varrpc=require('json-rpc2');rpc.Endpoint.$implement({'trace': function($super,direction,message){$super(' ('+direction+')',message);//call the last defined function}});

And you can start your classes directly from any of the classes

varMyCoolServer=require('json-rpc2').Server.$define('MyCoolServer',{myOwnFunction: function(){},},{myOwnClassMethod: function(){}});// MyCoolServer will contain all class and instance functions from ServerMyCoolServer.myOwnClassMethod();// class functionMyCoolServer.$create().myOwnFunction();// instance function

Debugging

This module uses the debug package, to debug it, you need to set the Node environment variable to jsonrpc, by setting it in command line as set DEBUG=jsonrpc or export DEBUG=jsonrpc

Examples

To learn more, see the examples directory, peruse test/jsonrpc-test.js, or simply "Use The Source, Luke".

More documentation and development is on its way.