Implemented JSON RPC specification

Contents

• Install
• Import module
• How to use simple handler
  • Create handler
  • Add to providers
  • Test with curl
• How to use multiple handlers in one class
  • Create handlers
  • Add to providers
  • Test with curl
• Decorators description
• Samples
• Changelog

Install

npm i --save nestjs-jrpc

Import module

Import module RpcModule from nestjs-jrpc, example

JsonRpcModule.forRoot({
  path: '/rpc', // path to RPC
});

How to use simple handler

Create simple RPC handler

Create handler

create RPC handler

import {
  RpcId,
  RpcPayload,
  RpcVersion,
  RpcMethod,
  IRpcHandler,
  RpcHandler,
} from 'nestjs-jrpc';

@RpcHandler({
  method: 'test',
})
export class TestHandler implements IRpcHandler<Payload> {
  public async invoke(
    @RpcPayload() payload: Payload,
    @RpcVersion() version: string,
    @RpcId() id: number | string,
    @RpcMethod() method: string,
  ) {
    return payload;
  }
}

Add to providers

Add TestHandler to providers array

Test with cURL

Every request to RPC is POST method and response status = 200

Test with curl

curl -X POST "http://localhost:3000/rpc" -H "accept: application/json" -H "Content-Type: application/json" -d '{"jsonrpc": "2.0", "method": "test", "id": 2}'

How to use multiple handlers in one class

Create multiple RPC handler in one class

Create handlers

Create RPC class handler

import {
  RpcId,
  RpcPayload,
  RpcVersion,
  RpcMethod,
  RpcMethodHandler,
  RpcHandler,
} from 'nestjs-jrpc';

@RpcHandler({
  method: 'contact',
})
export class ContactHandler {
  @RpcMethodHandler('add')
  public async add(
    @RpcPayload() payload: Payload,
    @RpcVersion() version: string,
    @RpcId() id: number | string,
    @RpcMethod() method: string,
  ) {
    return payload;
  }

  @RpcMethodHandler('delete')
  public async delete(
    @RpcPayload() payload: Payload,
    @RpcVersion() version: string,
    @RpcId() id: number | string,
    @RpcMethod() method: string,
  ) {
    return payload;
  }
}

Add to providers

Add ContactHandler to providers array

Test with cURL

Every request to RPC is POST method and response status = 200

Test with curl contact.add

curl -X POST "http://localhost:3000/rpc" -H "accept: application/json" -H "Content-Type: application/json" -d '{"jsonrpc": "2.0", "method": "contact.add", "id": 2}'

Test with curl contact.delete

curl -X POST "http://localhost:3000/rpc" -H "accept: application/json" -H "Content-Type: application/json" -d '{"jsonrpc": "2.0", "method": "contact.delete", "id": 2}'

Decorators description

| field | decorator | description | required | other | | --------- | --------------- | ----------------------- | -------- | --------------------------------------------------------------- | | params | @RpcPayload() | get payload ( params ) | false | use pipes... | | jsonrpc | @RpcVersion() | get rpc version | true | use pipes... | | method | @RpcMethod() | get rpc version | true | use pipes... | | id | @RpcId() | get client operation id | false | if not send - response not send, RPC notification. use pipes... |