Call GET HTTP Method with Express.JS Web API and MongoDB

Create a database with the name is learn_reactjs. This database have 1 collection: Product collection

/* Create learn_reactjs database */
use learn_reactjs

/* Create Product collection */
db.createCollection('product');

/* Dumping data for `product` collection */
/* 1 */
{
    "_id" : ObjectId("59eb397591876fae6628f17d"),
    "name" : "Mobile 1",
    "price" : 2.0,
    "quantity" : 4.0,
    "status" : true
}

/* 2 */
{
    "_id" : ObjectId("59eb3a3991876fae6628f17e"),
    "name" : "Mobile 2",
    "price" : 5.0,
    "quantity" : 2.0,
    "status" : false
}

/* 3 */
{
    "_id" : ObjectId("5a73bcda0f628d50d9dfe0a9"),
    "name" : "Laptop 2",
    "price" : 9,
    "quantity" : 3,
    "status" : true
}

/* 4 */
{
    "_id" : ObjectId("5a73bd120f628d50d9dfe0c6"),
    "name" : "Computer 1",
    "price" : 15,
    "quantity" : 8,
    "status" : false
}

/* 5 */
{
    "_id" : ObjectId("5a73e2f3ca031628a0701926"),
    "name" : "Computer 2",
    "price" : 20,
    "quantity" : 8,
    "status" : true
}

Create LearnReactJSWithRealApps_Server folder and select to this folder in Visual Studio Code

Use the following command to install Mongoose:

npm install mongoose --save

Use the following command to install Express.JS:

npm install express --save
npm install body-parser --save
npm install cookie-parser --save
npm install multer --save

Create schemas folder in Node project. Create product.schema.js file into schemas folder. Declare schema for product collection as below:

var mongoose = require('mongoose');

var ProductSchema = new mongoose.Schema(
    {
      name: String,
      price: Number,
      quantity: Number,
      status: Boolean
    },
    {
        versionKey: false
    }
);

module.exports = mongoose.model('Product', ProductSchema, 'product');

Create a new folder named api inside the server project. Create product.api.js file inside api folder contains Rest APIs provides application/json data for the client

var mongoose = require('mongoose');
var Product = require('../schemas/product.schema');

var ProductAPI = {
    findAll: function (request, response) {
        Product.find({}, function (error, products) {
            if (error) {
                throw error;
            } else {
                response.status(200).json(products);
            }
        });
    }
};

module.exports = ProductAPI;

Inside the api folder create a new file named index.js. This file will hold all the routes needed for rest api in server.

var express = require('express');
var mongoose = require('mongoose');

var router = express.Router();

mongoose.connect('mongodb://localhost:27017/learn_reactjs');

var ProductAPI = require('./product.api');

router.get('/product/findAll', ProductAPI.findAll);

module.exports = router;

At the root of server project, create a file named server.js. This will be the entry point into node application. This will start the server and listen on a local port

var express = require('express');
var bodyParser = require('body-parser');
var app = express();
app.use(bodyParser.urlencoded({
	extended: true
}));
app.use(bodyParser.json());

app.all('/*', function (req, res, next) {
	res.header("Access-Control-Allow-Origin", "*");
	res.header('Access-Control-Allow-Methods', 'GET,PUT,POST,DELETE,OPTIONS');
	res.header('Access-Control-Allow-Headers', 'Content-type,Accept,X-Access-Token,X-Key');
	if (req.method == 'OPTIONS') {
		res.status(200).end();
	} else {
		next();
	}
});

app.use('/api', require('./api/index'));

var server = app.listen(9090, function () {
	var host = server.address().address;
	var port = server.address().port;
	console.log("Server listening at http://%s:%s", host, port)
});

At the root of server project run command: node server.js

Access Rest API use the following url: http://localhost:9090/api/product/findAll

Output

[
    {"_id":"59eb397591876fae6628f17d","name":"Mobile 1","price":2,"quantity":4,"status":true},
    {"_id":"59eb3a3991876fae6628f17e","name":"Mobile 2","price":5,"quantity":2,"status":false},
    {"_id":"5a73bcda0f628d50d9dfe0a9","name":"Laptop 2","price":9,"quantity":3,"status":true},
    {"_id":"5a73bd120f628d50d9dfe0c6","name":"Computer 1","price":15,"quantity":8,"status":false},
    {"_id":"5a73e2f3ca031628a0701926","name":"Computer 2","price":20,"quantity":8,"status":true}
]

Create new folder named LearnReactJSWithRealApps and select to this folder in
Visual Studio Code

Open Terminal windows in Visual Studio Code and type:

npm install -g babel
npm install -g babel-cli
npm install webpack --save
npm install webpack-dev-server --save
npm install react --save
npm install react-dom --save
npm install --save-dev style-loader
npm install --save-dev css-loader

In assets folder, create new folder named css. In this folder, create new css file named style.css as below:

table {
    border-collapse: collapse;
}

table, th, td {
    border: 1px solid black;
}

In root folder of project, create new folder src\components. In this folder, create new file named product.component.jsx as below:

import React from 'react';

import styles from '../../assets/css/style.css';

class ProductComponent extends React.Component {

    constructor() {
        super();
        this.state = {
            products: []
        };
    }

    componentDidMount() {
        fetch('http://localhost:9090/api/product/findall')
            .then(res => res.json())
            .then(res => {
                this.setState({
                    products: res
                });
            })
            .catch(error => {
                console.log(error)
            });
    }

    render() {
        return (
            <div>
                <h3>Product List</h3>
                <table cellPadding="3" cellSpacing="3">
                    <thead>
                        <tr>
                            <th>Id</th>
                            <th>Name</th>
                            <th>Status</th>
                            <th>Price</th>
                            <th>Quantity</th>
                            <th>Sub Total</th>
                        </tr>
                    </thead>
                    <tbody>
                        {this.state.products.map(function (p, index) {
                            return (
                                <tr>
                                    <td>{p._id}</td>
                                    <td>{p.name}</td>
                                    <td>{p.status}</td>
                                    <td>{p.price}</td>
                                    <td>{p.quantity}</td>
                                    <td>{p.price * p.quantity}</td>
                                </tr>
                            );
                        })}
                    </tbody>
                </table>
            </div>
        );
    }

}

export default ProductComponent;

In root folder of project, create new file named main.js as below:

import React from 'react';
import ReactDOM from 'react-dom';

import ProductComponent from './src/components/product.component.jsx';

ReactDOM.render(<ProductComponent />, document.getElementById('app'));

In root folder of project, create new file named webpack.config.js as below:

var config = {
    entry: './main.js',

    output: {
        path: __dirname,
        filename: 'index.js',
    },

    devServer: {
        inline: true,
        port: 8081 // server port
    },

    module: {
        loaders: [
            {
                test: /\.css$/,
                loader: 'style-loader'
            },
            {
                test: /\.css$/,
                loader: 'css-loader',
                query: {
                    modules: true,
                    localIdentName: '[name]__[local]___[hash:base64:5]'
                }
            },
            {
                test: /\.jsx?$/,
                exclude: /node_modules/,
                loader: 'babel-loader',
                query: {
                    presets: ['es2015', 'react']
                }
            }
        ]
    }
}

module.exports = config;

In root folder of project, create new file named index.html as below:

<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Learn ReactJS With Real Apps</title>
</head>
<body>

    <div id="app"></div>
    <script src="index.js"></script>

</body>
</html>

In root folder of project, create new file named package.json as below:

{
  "name": "learnreactjswithrealapps",
  "version": "1.0.0",
  "description": "Learn ReactJS With Real Apps",
  "main": "main.js",
  "dependencies": {
    "babel-core": "^6.24.0",
    "babel-loader": "^6.4.1",
    "babel-preset-es2015": "^6.24.0",
    "babel-preset-react": "^6.23.0",
    "react": "^15.4.2",
    "react-dom": "^15.4.2",
    "webpack": "^2.3.2",
    "webpack-dev-server": "^2.4.2"
  },
  "devDependencies": {
    "css-loader": "^0.28.11",
    "style-loader": "^0.21.0"
  },
  "scripts": {
    "start": "webpack-dev-server"
  },
  "repository": {
    "type": "git",
    "url": "git+https://github.com/reactjs/react-tutorial.git"
  },
  "keywords": [
    "react"
  ],
  "author": "PMK Lab",
  "license": "ISC",
  "bugs": {
    "url": "https://github.com/reactjs/react-tutorial/issues"
  },
  "homepage": "https://github.com/reactjs/react-tutorial#readme"
}

In Terminal windows in Visual Studio Code and type: npm start,
program will open url http://localhost:8081/ on browser

Call GET HTTP Method with Express.JS Web API and MongoDB

Create Database

Create Server Project

Install Mongoose

Install Express.JS

Define Schema

Create Rest API

Create Rest API Routing

Create Rest API Server

Structure of Server Project

Test Rest API Server

Create New Project

Install ReactJS Libraries

Add CSS Files

Create Component

Create Entry File

Create WebPack Config File

Create HTML File

Create package.json

Structure of Project

Run Application

Output