Learn back-end development with Node.js, covering HTTP servers, databases, JWT, WebSockets, and more. Consolidate your skills in a capstone project by building a RESTful API for a practical use case.

nodegui.tar.gz

Without_start_script

With_start_script

cookingProcess

writeFileExample

fileProcessor

fileTask

dynamicServer

directoryManager

axios

expressjs

axios_http

dotenv

lodash

nodemon

postgres

postgres-api

postgres-exercise

bcrypt

complete_authentication

websocket-server

math-jest

async-jest

npm-intro-exercise

babel

process_env

process_dotenv

process_lifecycle

Without_start_script-debug

babel-copy

This Node.js course offers a structured path to mastering back-end development. It begins with introducing Node.js and JavaScript in the server-side context, covering modules and foundational concepts. You’ll explore asynchronous programming with callbacks, Promises, async/await, and the event loop, followed by event-driven programming with the EventEmitter class. Practical skills include file system operations, working with buffers, and using streams for efficient data handling.

The course will then guide you through building HTTP servers, implementing routing, handling GET/POST requests, and integrating PostgreSQL for database-driven APIs. Additional topics include JWT-based authentication, WebSockets for real-time features like chat systems and live dashboards, and testing with Jest.

In the capstone project, you’ll build a RESTful API that stores arbitrary JSON data and enables filtering and retrieval in JSON, HTML, or CSV formats, enhancing your skills in building scalable back-end solutions.

Learn Node.js

 It handles all GET requests by responding with "GET received" in JSON format.

It responds with "POST received" for any POST request.

It responds with "Specific hello route" only for GET requests to `/api/hello`.

 It responds with JSON for all requests to `/api`.

Which statement is true about the server started by the following code?
```javascript
const http = require('http');

const server = http.createServer((req, res) => {
    if (req.url === '/api' && req.method === 'GET') {
        res.writeHead(200, { 'Content-Type': 'application/json' });
        res.write(JSON.stringify({ message: 'GET received' }));
    } else if (req.url.startsWith('/api') && req.method === 'POST') {
        res.writeHead(201, { 'Content-Type': 'text/plain' });
        res.write('POST received');
    } else if (req.url === '/api/hello' && req.method === 'GET') {
        res.write('Specific hello route');
    } else {
        res.writeHead(404);
        res.write('Not Found');
    }
    res.end();
});

server.listen(3000);
```


Which statement is true about the server started by the following code?
<pre><code class="language-javascript">const http = require('http');

const server = http.createServer((req, res) =&gt; {
 if (req.url === '/api' &amp;&amp; req.method === 'GET') {
 res.writeHead(200, { 'Content-Type': 'application/json' });
 res.write(JSON.stringify({ message: 'GET received' }));
 } else if (req.url.startsWith('/api') &amp;&amp; req.method === 'POST') {
 res.writeHead(201, { 'Content-Type': 'text/plain' });
 res.write('POST received');
 } else if (req.url === '/api/hello' &amp;&amp; req.method === 'GET') {
 res.write('Specific hello route');
 } else {
 res.writeHead(404);
 res.write('Not Found');
 }
 res.end();
});

server.listen(3000);
</code></pre>

GET sends data in the request body, while POST sends data in the URL.

GET is used to retrieve data, while POST is used to send data to the server.

GET is slower than POST because it appends parameters to the URL.

Which statement about GET and POST methods is correct?

Which statement about GET and POST methods is correct?

An error message about unsupported routes.

Consider the following code:
```javascript
const http = require('http');

const server = http.createServer((req, res) => {
    if (req.url === '/' && req.method === 'GET') {
        res.write('Welcome to the Homepage!');
    } else if (req.url === '/about' && req.method === 'POST') {
        res.write('About this server');
    } else {
        res.write('404 Not Found');
    }
    res.end();
});

server.listen(3000);
```
Assuming the following `curl` request, what will be the server response:

```shell
curl http://localhost:3000/about
```


Consider the following code:
<pre><code class="language-javascript">const http = require('http');

const server = http.createServer((req, res) =&gt; {
 if (req.url === '/' &amp;&amp; req.method === 'GET') {
 res.write('Welcome to the Homepage!');
 } else if (req.url === '/about' &amp;&amp; req.method === 'POST') {
 res.write('About this server');
 } else {
 res.write('404 Not Found');
 }
 res.end();
});

server.listen(3000);
</code></pre>
Assuming the following <code>curl</code> request, what will be the server response:
<pre><code class="language-shell">curl http://localhost:3000/about
</code></pre>

It ensures the server responds only to GET requests.

It allows the server to distinguish between different HTTP methods.

It prevents the server from handling unknown URLs.

It automatically validates incoming requests.

What is the role of the `req.method` property in route handling?

What is the role of the <code>req.method</code> property in route handling?

"Search results for: nodejs, Category: No category provided, Sort: asc"

"Search results for: No term provided, Category: General, Sort: asc"

"Search results for: nodejs, Category: General, Sort: asc"

What is the output of the following code for a GET request to `/search?term=nodejs&sort=asc`?

```javascript
const http = require('http');

const server = http.createServer((req, res) => {
    if (req.url.startsWith('/search') && req.method === 'GET') {
        const queryString = req.url.split('?')[1];
        const params = new URLSearchParams(queryString);
        const term = params.get('term') || 'No term provided';
        const category = params.get('category') || 'General';
        const sort = params.get('sort') || 'No sort order provided';

        res.writeHead(200, { 'Content-Type': 'text/plain' });
        res.end(`Search results for: ${term}, Category: ${category}, Sort: ${sort}`);
    }
});

server.listen(3000);
```

What is the output of the following code for a GET request to <code>/search?term=nodejs&amp;sort=asc</code>?
<pre><code class="language-javascript">const http = require('http');

const server = http.createServer((req, res) =&gt; {
 if (req.url.startsWith('/search') &amp;&amp; req.method === 'GET') {
 const queryString = req.url.split('?')[1];
 const params = new URLSearchParams(queryString);
 const term = params.get('term') || 'No term provided';
 const category = params.get('category') || 'General';
 const sort = params.get('sort') || 'No sort order provided';

 res.writeHead(200, { 'Content-Type': 'text/plain' });
 res.end(`Search results for: ${term}, Category: ${category}, Sort: ${sort}`);
 }
});

server.listen(3000);
</code></pre>

Test your understanding of web servers in Node.js with this comprehensive quiz.

Getting Started with Node.js

Global Objects and Modules

Asynchronous Programming

Event-Driven Programming

Core Node.js Modules

Building a Basic Web Server

npm and Package Management

Working with Databases

Advanced Topics

Wrap Up

Appendix

Building a RESTful API with Node.js and PostgreSQL

Quiz: Building a Basic Web Server