JSON RPC 2.0 Server without npm packages.

You can use Promises, Async/Await.

HTTP Server example:

const { add_method, http_server } = require('./rpc');

add_method('add', async (args) => args[0] + args[1]);

add_method('subtract', async (args) =>  args[0] - args[1]);

http_server.listen(3000, () => {
  console.log('JSON RPC Server is run on port 3000');
});

-- TCP Server example

const { add_method, tcp_server } = require('./rpc');

add_method('add', async (args) => args[0] + args[1]);

add_method('subtract', async (args) =>  args[0] - args[1]);

tcp_server.listen(8124);
console.log('JSON RPC TCP Server is run on port 8124');

Installation

Quick guide:

# Clone repository
$ git clone https://github.com/WebStyle/json-rpc.git

# Change directory
$ cd json-rpc

# Then simply start your app
$ npm start

Method definition example

const { add_method } = require('./rpc');

add_method('method_name', async (args) => {
  // your code 
  // you must return data
  
  return {};
});

Server Errors

If you should like to return an error from an method request to indicate a failure. You can use send_error function and send error object. JSON RPC 2.0 error object specification.

const { add_method, send_error } = require('./rpc');

add_method('method_name', async (args) => {
  return send_error({ message: "error_message", code: -32603});
});