@therms/rpc-client

@therms/rpc-client

A Remote Procedure Call framework for Javascript environments (Node.js & Browser).

npm i @therms/rpc-client

Client

Basic Usage

import { RPCClient } from '@therms/rpc-client'

/* Create a client instance */
const rpc = new RPCClient({
  hosts: {
    http: 'localhost:3995/rpc',
    websocket: 'localhost:3996', // optional
  },
});

/* Make a remote procedure call */
const {
  code, // http status code, ie: 200
  data, // any data returned from the remote/server
  message, // a human readable message from the remote/server
  success, // boolean, true|false if the procedure was succesful
} = await rpc.call({
  // optional
  args: {
    email: '[e-mail]',
    password: '1234567',
  },
  procedure: 'login',
  // optional
  scope: 'auth',
  // optional
  version: '1',
});

Advanced Usage

Create a client instance w/ cache and call deadline/timeout

const rpc = new RPCClient({
  cacheMaxAgeMs: 5 * 60 * 1000, // optional
  deadlineMs: 5000, // optional
  hosts: {
    http: 'localhost:3995/rpc',
  },
});

Create request interceptor

const rpc = new RPCClient({
  hosts: {
    http: 'localhost:3995/rpc',
  },
  requestInterceptor: (request) => {
    request.args.count = request.args.count + 1;

    return request;
  },
});

const { data } = await rpc.call({
  args: { count: 1 },
  procedure: 'intercept-request',
});

console.log(data.count); // => 2

Create response interceptor

const rpc = new RPCClient({
  hosts: {
    http: 'localhost:3995/rpc',
  },
  responseInterceptor: (response) => {
    response.data.count = 100;

    return response;
  },
});

const { data } = await rpc.call({
  args: { count: 1 },
  procedure: 'intercept-request',
});

console.log(data.count); // => 100

Create a client instance w/ custom transports

First, setup a custom Transport:

see the required interface in src/client/Transports/Transport.ts

class CustomHTTPTransport {
  isConnected() {
    return true;
  }

  name: 'CustomHTTPTransport';

  async sendRequest(call) {
    const response = await fetch('localhost:3901/rpc', {
      data: call,
    }).then((res) => res.json());

    return response;
  }

  setIdentity(identity) {
    this.identity = identity;
  }
}

Then, use the CustomHTTPTransport when you create a client instance:

const rpc = new RPCClient({
  cacheMaxAgeMs: 5 * 60 * 1000, // optional
  deadlineMs: 5000, // optional
  transports: {
    http: new CustomHTTPTransport(),
  },
});