Building RestFul API Microservice using Express JS Project #05
Express JS is a popular web application framework for Node.js that provides a robust set of features for building RestFul APIs. In this tutorial, we will create a microservice using Express JS to build a RestFul API for a project.
Step 1: Setting Up the Project
First, we need to create a new directory for our project and initialize it with a package.json file. We can do this by running the following commands in our terminal:
mkdir project05
cd project05
npm init -y
Step 2: Installing Express
Next, we need to install Express as a dependency for our project. We can do this by running the following command in our terminal:
npm install express
Step 3: Creating the API
Now that we have Express installed, we can create our RestFul API by creating a new file called server.js in our project directory. We can then define our API endpoints and logic within this file. Here’s an example of how our server.js file might look:
const express = require('express');
const app = express();
app.get('/api/users', (req, res) => {
// Your logic to fetch users from database or any other source
res.json({ users: [] });
});
app.post('/api/users', (req, res) => {
// Your logic to create a new user
res.json({ message: 'User created' });
});
app.listen(3000, () => {
console.log('Server is running on port 3000');
});
Step 4: Running the API
Finally, we can run our API by running the following command in our terminal:
node server.js
Once the server is running, we can test our API endpoints by making requests to http://localhost:3000/api/users using tools like Postman or curl.
And that’s it! We have successfully built a RestFul API microservice using Express JS for our project. This API can now be used to serve data and functionality to other parts of our application or even external clients.
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