piroor/gist:d559859729a1f5d811744f2da6b9c668

## gistfile1.txt
/*
  Demonstration of third-party tracker cookie
  Original: https://iq.opengenus.org/third-party-cookies/

  How to run:
    1. Download this as a file `demo.js`.
    2. Run `npm install express` and `npm install cookie-parser`.
    3. Run `node demo.js`.
    4. Open `http://127.0.0.1:3000`, `http://127.0.0.2:3000`, and `http://127.0.0.3:3000` on your web browser.
    5. Reload those tabs again and again.

  Expected result if third-party tracker cookies are blocked:
    You'll see different "[tracker] visitor is *" message for each tab, or
    you'll see "[tracker] new visitor: *" for every loading.

  Expected result if third-party tracker cookies are not blocked:
    You'll see same "[tracker] visitor is *" message for all tabs.
*/

const express = require('express');
const cookieParser = require('cookie-parser');

// tracker
(async () => {
  const app = express();
  const port = 8000;

  app.use(cookieParser());

  app.get('/', (request, response) => res.send('tracker'))

  let count = 0;
  app.get('/tracker', (request, response) => {
    count++;
    if (!request.cookies || !request.cookies["third-party"]){
      response.cookie('third-party', count.toString(), { maxAge: 9999999 });
      console.log('[tracker] new visitor: ', count.toString());
    }
    else{
      console.log('[tracker] visitor is ', request.cookies);
    }
    response.send('');
  });

  app.listen(port, () => console.log(`tracker listening on the port ${port}`))
})();

(async () => {
  const app = express();
  const port = 3000;
  const cookieParser = require('cookie-parser');

  app.use(cookieParser());

  app.get('/', (request, response) => {
    response.cookie('first-party', 'first');
    response.type('html');
    response.send(`
<!DOCTYPE html>
<head>
</head>
<body onload="getCookie()">
  <script type="application/x-javascript" src="http://127.0.0.254:8000/tracker"></script>
  <p>Cookie:
  <script type="application/x-javascript">
    document.write(document.cookie);
  </script></p>
</body>
</html>
      `.trim()
    );
  });

  app.listen(port, () => console.log(`Example website app listening on the port ${port}`))
})();
	/*
	Demonstration of third-party tracker cookie
	Original: https://iq.opengenus.org/third-party-cookies/

	How to run:
	1. Download this as a file `demo.js`.
	2. Run `npm install express` and `npm install cookie-parser`.
	3. Run `node demo.js`.
	4. Open `http://127.0.0.1:3000`, `http://127.0.0.2:3000`, and `http://127.0.0.3:3000` on your web browser.
	5. Reload those tabs again and again.

	Expected result if third-party tracker cookies are blocked:
	You'll see different "[tracker] visitor is *" message for each tab, or
	you'll see "[tracker] new visitor: *" for every loading.

	Expected result if third-party tracker cookies are not blocked:
	You'll see same "[tracker] visitor is *" message for all tabs.
	*/

	const express = require('express');
	const cookieParser = require('cookie-parser');

	// tracker
	(async () => {
	const app = express();
	const port = 8000;

	app.use(cookieParser());

	app.get('/', (request, response) => res.send('tracker'))

	let count = 0;
	app.get('/tracker', (request, response) => {
	count++;
	if (!request.cookies \|\| !request.cookies["third-party"]){
	response.cookie('third-party', count.toString(), { maxAge: 9999999 });
	console.log('[tracker] new visitor: ', count.toString());
	}
	else{
	console.log('[tracker] visitor is ', request.cookies);
	}
	response.send('');
	});

	app.listen(port, () => console.log(`tracker listening on the port ${port}`))
	})();

	(async () => {
	const app = express();
	const port = 3000;
	const cookieParser = require('cookie-parser');

	app.use(cookieParser());

	app.get('/', (request, response) => {
	response.cookie('first-party', 'first');
	response.type('html');
	response.send(`
	<!DOCTYPE html>
	<head>
	</head>
	<body onload="getCookie()">
	<script type="application/x-javascript" src="http://127.0.0.254:8000/tracker"></script>
	<p>Cookie:
	<script type="application/x-javascript">
	document.write(document.cookie);
	</script></p>
	</body>
	</html>
	`.trim()
	);
	});

	app.listen(port, () => console.log(`Example website app listening on the port ${port}`))
	})();