Basic Node.js Samples

http-create-server.js

let http = require("http");

/***
 * This is the 'Hello, World' of Node.js HTTP Servers. 
 */
class Server {
    constructor() {
        http.createServer(function (request, response) {
            response.writeHead(200);
            response.write("Hello, World.");
            response.end();
        }).listen(8080);
    }
}

export default Server;

http-server-event-emitter.js

var http = require('http');

/***
 * This is a simple HTTP Server using 'on request' EventEmitter event.  
 */
class Server {
    constructor() {
        var server = http.createServer();
        server.on("request", (request, response) => {
            "use strict";
            response.writeHead(200);
            response.write("Hello, this is Dog");
            response.end();
        });
        server.listen(8080);
    }
}

export default Server;

http-server-read-streams-v2.js

let http = require('http');

/***
 * This HTTP Server reads the 'request' stream and print it into console.log as well as back to the user (v2).
 */
class Server {
    constructor() {
        let server = http.createServer();
        server.on('request', (request, response) => {
            request.pipe(process.stdout);
            request.pipe(response);
        });
        server.listen(8080);
    }
}

export default Server;

http-server-read-streams.js

let http = require('http');

/***
 * This HTTP Server reads the 'request' stream and print it into console.log as well as back to the user.
 */
class Server {
    constructor() {
        let server = http.createServer();
        server.on('request', (request, response) => {
            request.on("readable", () => {
                let chunk = null;
                while (null !== (chunk = request.read())) {
                    console.log(chunk.toString());
                    response.write(chunk);
                }
            });
            request.on('end', () => {
                response.end();
            });
        });
        server.listen(8080);
    }
}

export default Server;

http-server-send-file.js

var http = require('http');
var fs = require('fs');

/***
 * Creating a Simple HTTP Server and serving a file.
 */
class Server {
    constructor() {
        http.createServer(function(request, response) {
            response.writeHead(200);
            fs.readFile(__dirname + "/index.html", function(err, data) {
                console.log(err);
                data = String.fromCharCode.apply(null, data);
                response.write(data);
                response.end();
            });
        }).listen(8080);
    }
}

export default Server;

http-server-socket-io.js

let app = require('express')(),
    server = require('http').createServer(app),
    io = require('socket.io').listen(server);

/***
 * This is a simple HTTP Server with Express and Socket.IO
 */
class Server {
    constructor() {
        io.on("connection", (client) => {
           console.log("Client connected ...");
        });
        app.get("/", (req, res) => {
            res.sendFile(__dirname + "/index.html");
        });
        server.listen(8080);
    }
}

export default Server;

http-server-upload-file.js

let fs = require('fs'),
    http = require('http');

/***
 * This is a simple HTTP Server to upload a file.
 */
class Server {
    constructor() {
        let server = http.createServer();
        server.on('request', (request, response) => {
            let uploadedFile = fs.createWriteStream('uploadedFile.txt');
            request.pipe(uploadedFile);
            request.on('end', () => {
                response.end('uploaded!');
            });
        });
        server.listen(8080, () => {
            console.log("Listening at http://localhost:8080");
        });
    }
}

export default Server;

read-file.js

let fs = require('fs');

/***
 * Reading a file and printing out to console.
 */
class ReadFile {
    constructor() {
        fs.readFile('index.html', function (err, contents) {
            if (err) console.log("err: " + err);
            else console.log(contents);
        });
    }
}

export default ReadFile;

Simple Node.js Samples.md

Simple Node.js Samples

The idea behind this gist is to add Node.js handy and illustrative samples.

@lintuxt, Alexis Charytonow, MIT License, 2016