Learned modules in Node.

.gitignore

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+.DS_Store

echo_server.js

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+const http = require('http');
+
+const PORT = 3000;
+
+const server = http.createServer();
+
+
+const onRequest = (request, response) => {
+
+    request.on('error', (err) => {
+        console.error(err);
+        response.statusCode = 400;
+        response.end();
+    });
+    response.on('error', (err) => {
+        console.error(err);
+    });
+
+    const {
+        method, url
+    } = request;
+
+    if (method === 'POST' && url === '/echo') {
+        request.pipe(response);
+    } else {
+        response.statusCode = 404;
+        response.end();
+    }
+};
+
+
+server.on('request', onRequest);
+
+server.listen(PORT, () => {
+    console.log('Server is listening at port:', PORT);
+});

events/server.js

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+const http = require('http');
+
+const PORT = 8080;
+
+const server = http.createServer();
+const onRequest = (request, response) => {
+    response.writeHead(200, {
+        'Content-Type': 'text/html'
+    });
+    response.end(`<h1>Learning NodeJs <em>Macha</em>!!</h1>`);
+};
+
+server.on('request', onRequest);
+server.listen(PORT, () => {
+    console.log(`Listening at ${PORT}`);
+});

modules/server.js

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+const shapes = require('./shapes');
+console.log(shapes);

modules/shapes/circle.js

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+class Circle {
+    constructor(radius, point = {
+        x: 0,
+        y: 0
+    }) {
+        this.radius = radius;
+    }
+
+    get area() {
+        const rSquare = Math.pow(this.radius, 2);
+        return Math.PI * rSquare;
+    }
+}
+
+module.exports = Circle;

modules/shapes/index.js

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+const Circle = require('./circle');
+const Rect = require('./rect');
+
+module.exports = {
+    Circle, Rect
+};

modules/shapes/package.json

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+{
+    "name": "shapes",
+    "main": "./index.js"
+}

modules/shapes/rect.js

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+class Rect {
+    constructor(a, b) {
+        this.a = a;
+        this.b = b;
+    }
+    get area() {
+        return a * b;
+    }
+}
+
+
+module.exports = Rect;