The http Module Part -1¶

Setup our Project¶

1. Create a new folder, and name it "myserver".
2. Initialize the npm: npm init
3. Install the http module: npm install http
4. Create a new file inside the "myserver" folder, and name it "index.js".
5. Add the following lines to "index.js":

const http = require("http");

//create the server
const server = http.createServer((request, response) => {
    response.end("Hey, it's my first nodejs program");
});

server.listen(8000, () => console.log("The server is running on port 8000"));

1. In the terminal, write nodejs index.js.
2. You can see "The server is running on port 8000 " displayed in the terminal.
3. Open the browser at http://localhost:8000.
4. You can see "Hey, it's my first nodejs program" displayed in the browser.

Require Statement¶

Task 1: Start a new nodejs project, and name it "project1".

# Create a new folder, and name it "project1"
# Go to that "project1" directory
npm init

Task 2: Refer to Task 1; add the http module to project1.

npm install http

Task 3: Refer to Task 1; create a new file in project1, and name it index.js. Add the http module to index.js. Hint: use require('http').

const http = require('http');

The http object¶

Task 4: Refer to task 3; display http in the console.

const http = require('http');
console.log(http);

// Run nodejs index.js

You get an Object:

{
  METHODS: [
    'ACL',        'BIND',        'CHECKOUT',
  ],
  STATUS_CODES: {
    '100': 'Continue',
    '101': 'Switching Protocols',
    '511': 'Network Authentication Required'
  },
  Agent: [Function: Agent] { defaultMaxSockets: Infinity },
  Server: [Function: Server],
  ServerResponse: [Function: ServerResponse],
  createServer: [Function: createServer],
  get: [Function: get],
  request: [Function: request],
}

STATUS_CODES¶

Task 5: Refer to task 3; since http is an object, display in the console the meaning of the status_code 200. Hint: look at the result of task 4 carefully.

const http = require('http');

console.log(http.STATUS_CODES["200"]);

The result is: Ok

Task 6: Refer to task 3; since http is an object, display in the console the meaning of the status_code 500.

const http = require('http');

console.log(http.STATUS_CODES["500"]);

The result is: 'Internal Server Error'

Task 7: Refer to task 3; since http is an object, display in the console the meaning of the status_code 404.

const http = require('http');

console.log(http.STATUS_CODES["404"]);

The result is: 'Not Found'

Task 8: Refer to task 3; since http is an object, display in the console the meaning of the status_code 400.

const http = require('http');

console.log(http.STATUS_CODES["400"]);

The result is: 'Bad Request'

createServer()¶

Task 9: Refer to task 3; call the createServer() method on the http object.

const http = require('http');

const server = http.createServer();

Task 10: Refer to task 9; call the listen(9000) method on the server object. Then, run nodejs index.js, and open the url http://localhost:9000 in the browser.

const http = require('http');

const server = http.createServer();
server.listen(9000);

Task 11: Add the following code to the index.js file, and run nodejs index.js. Then, go to the http://localhost:9000 in the browser.

const http = require('http');

const server = http.createServer((request, response) => {
    response.end("Hello there");
});
server.listen(9000);

You can see there: Hello there displayed in the browser.

Mini Projects¶

Project 1¶

Task 12: Create a nodejs server that listens on port "5000", and displays "I'm running on port 5000, yesss!" in the browser window.

mkdir project1 # Create a folder for the project
cd project1
npm init
npm install http
touch index.js # create index.js

Write the following in index.js:

const http = require('http');

const server = http.createServer((request, response) => {
    response.end("I'm running on port 5000, yesss!");
});
server.listen(5000);

Project 2¶

Task 13: Create a nodejs server that listens on port "8887", and display "Ok, I'm doing it again!" in the browser window.

mkdir project2 # Create a folder for the project
cd project2
npm init
npm install http
touch index.js # create index.js

Write the following in index.js:

const http = require('http');

const server = http.createServer((request, response) => {
    response.end("Ok, I'm doing it again!");
});
server.listen(8887);