├── .env.example
├── .github
    └── workflows
    │   └── nodejs.yml
├── .gitignore
├── README.md
├── client.js
├── package-lock.json
├── package.json
└── proto
    └── chat.proto


/.env.example:
--------------------------------------------------------------------------------
1 | RPC_HOST=localhost
2 | RPC_PORT=9000


--------------------------------------------------------------------------------
/.github/workflows/nodejs.yml:
--------------------------------------------------------------------------------
 1 | # This workflow will do a clean install of node dependencies, build the source code and run tests across different versions of node
 2 | # For more information see: https://help.github.com/actions/language-and-framework-guides/using-nodejs-with-github-actions
 3 | 
 4 | name: Node.js CI
 5 | 
 6 | on:
 7 |   push:
 8 |     branches: [ master ]
 9 |   pull_request:
10 |     branches: [ master ]
11 | 
12 | jobs:
13 |   build:
14 | 
15 |     runs-on: ubuntu-latest
16 | 
17 |     strategy:
18 |       matrix:
19 |         node-version: [10.x, 12.x]
20 | 
21 |     steps:
22 |     - uses: actions/checkout@v2
23 |     - name: Use Node.js ${{ matrix.node-version }}
24 |       uses: actions/setup-node@v1
25 |       with:
26 |         node-version: ${{ matrix.node-version }}
27 |     - run: npm ci
28 |     - run: npm run build --if-present
29 | 


--------------------------------------------------------------------------------
/.gitignore:
--------------------------------------------------------------------------------
1 | .idea/
2 | .env
3 | node_modules/


--------------------------------------------------------------------------------
/README.md:
--------------------------------------------------------------------------------
 1 | # RPC Client in NodeJS
 2 | 
 3 | ![hero](https://res.cloudinary.com/ichtrojan/image/upload/v1588771860/Screenshot_2020-05-06_at_14.29.28_bub5m3.png)
 4 | 
 5 | ## Introduction
 6 | 
 7 | This codebase was built as a demo to practice RPC with [Go](https://golang.org) and [Javascript (node)](http://nodejs.org).
 8 | The RPC server was built in Go, you can find the codebase [here](https://github.com/ichtrojan/grpc-server).
 9 | 
10 | ## Prerequisites
11 | * Protobuf installed on you machine
12 | * NodeJS installed on your Machine
13 | * Basic understanding of the basics of RPC
14 | * Fundamental knowledge of NodeJS
15 | * Fundamental knowledge of Go (to set up the RPC server)
16 | 
17 | ## Installation
18 | 
19 | * clone this repo by running:
20 | 
21 | ```bash
22 | git clone https://github.com/ichtrojan/node-rpc-client.git
23 | ```
24 | 
25 | * change directory into the repo:
26 | 
27 | ```bash
28 | cd node-rpc-client
29 | ```
30 | 
31 | * Install dependencies:
32 | 
33 | ```bash
34 | npm install
35 | ```
36 | 
37 | * Create `.env` frile from sample:
38 | 
39 | ```bash
40 | cp .env.example .env
41 | ```
42 | 
43 | * Run the client
44 | 
45 | ```bash
46 | node client.js
47 | ```
48 | 
49 | By default, the client will listen on `localhost` via port `9000`. which is what was duplicated from the `.env.example` file and also what is defined in the RPC server config assuming all configuration are left as default.
50 | 
51 | ## Conclusion
52 | 
53 | I would normally explain what every line does. But, I do not have the mental bandwidth to do so at the moment.
54 | You can take a look at the hero image at the top, my IDE did its best to explain what each parameter does.
55 | 
56 | Regards <br/>
57 | Michael Trojan Okoh 
58 | 


--------------------------------------------------------------------------------
/client.js:
--------------------------------------------------------------------------------
 1 | const dotenv = require('dotenv')
 2 | 
 3 | const GRPCClient = require('node-grpc-client')
 4 | 
 5 | const path = require("path")
 6 | 
 7 | const PROTO_PATH = path.resolve(__dirname, './proto/chat.proto')
 8 | 
 9 | dotenv.config()
10 | 
11 | const PORT = process.env.RPC_PORT
12 | const HOST = process.env.RPC_HOST
13 | 
14 | const client = new GRPCClient(PROTO_PATH, 'chat', 'ChatService', `${HOST}:${PORT}`)
15 | 
16 | const message = {
17 |     body: "Hello from Trojan",
18 | }
19 | 
20 | const details = {
21 |     name: "Trojan",
22 |     age: 40
23 | }
24 | 
25 | client.runService('SayHello', message, (err, res) => {
26 |     console.log(res.body);
27 | });
28 | 
29 | client.runService('GetDetails', details, (err, res) => {
30 |     console.log(res.body);
31 | });


--------------------------------------------------------------------------------
/package-lock.json:
--------------------------------------------------------------------------------
  1 | {
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320 |           "dev": true,
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346 |           }
347 |         },
348 |         "fs.realpath": {
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351 |           "dev": true
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353 |         "gauge": {
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371 |           "dev": true,
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374 |             "inflight": "^1.0.4",
375 |             "inherits": "2",
376 |             "minimatch": "^3.0.4",
377 |             "once": "^1.3.0",
378 |             "path-is-absolute": "^1.0.0"
379 |           }
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384 |           "dev": true
385 |         },
386 |         "iconv-lite": {
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388 |           "bundled": true,
389 |           "dev": true,
390 |           "requires": {
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392 |           }
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394 |         "ignore-walk": {
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397 |           "dev": true,
398 |           "requires": {
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402 |         "inflight": {
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404 |           "bundled": true,
405 |           "dev": true,
406 |           "requires": {
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408 |             "wrappy": "1"
409 |           }
410 |         },
411 |         "inherits": {
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413 |           "bundled": true,
414 |           "dev": true
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418 |           "bundled": true,
419 |           "dev": true
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--------------------------------------------------------------------------------
/package.json:
--------------------------------------------------------------------------------
 1 | {
 2 |   "name": "rpc-client",
 3 |   "version": "1.0.0",
 4 |   "description": "A RPC client to call a gRPC server ",
 5 |   "main": "client.js",
 6 |   "scripts": {
 7 |     "test": "echo \"Error: no test specified\" && exit 1"
 8 |   },
 9 |   "repository": {
10 |     "type": "git",
11 |     "url": "git+https://github.com/ichtrojan/node-rpc-client.git"
12 |   },
13 |   "author": "Michael Okoh",
14 |   "license": "MIT",
15 |   "bugs": {
16 |     "url": "https://github.com/ichtrojan/node-rpc-client/issues"
17 |   },
18 |   "homepage": "https://github.com/ichtrojan/node-rpc-client#readme",
19 |   "devDependencies": {
20 |     "dotenv": "^8.2.0",
21 |     "grpc": "^1.24.2",
22 |     "node-grpc-client": "^1.4.0"
23 |   }
24 | }
25 | 


--------------------------------------------------------------------------------
/proto/chat.proto:
--------------------------------------------------------------------------------
 1 | syntax = "proto3";
 2 | 
 3 | package chat;
 4 | 
 5 | message Message {
 6 |   string body = 1;
 7 | }
 8 | 
 9 | message Details {
10 |   string name = 1;
11 |   int32 age = 2;
12 | }
13 | 
14 | message Response {
15 |   string body = 1;
16 | }
17 | 
18 | service ChatService {
19 |   rpc SayHello(Message) returns (Response) {}
20 |   rpc GetDetails(Details) returns (Response) {}
21 | }


--------------------------------------------------------------------------------