crazy4groovy/index.html

## index.html
<!doctype html>
<html lang="en">
  <head>
    <!-- Required meta tags -->
    <meta charset="utf-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

    <!-- Bootstrap CSS -->
    <link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

    <title>Hello, world!</title>
  </head>
  <body>
    <h1>Cloudflare Workers Link Shortener</h1>
    <h2>Create a Link</h2>
    <pre>$ curl https://l.obez.uk/?new=https://cloudflare.com</pre>

    <!-- Optional JavaScript -->
    <!-- jQuery first, then Popper.js, then Bootstrap JS -->
    <script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
    <script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
    <script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
  </body>
</html>

## link-shorten.js
addEventListener('fetch', event => {
  event.respondWith(handleRequest(event.request))
})

async function generate_rand(i) { // recursively fetch randon values incase there is a collision

  if (typeof i == 'undefined') {
    i = 0;
  }

  if (i >= 5) {
    throw new Error('Limiting random key checks to 5');
  }

  try {
    var rand_response = await fetch(new Request('https://csprng.xyz/v1/api?length=6'));
    var rand = await rand_response.json();
    var random_data = rand.Data;
    var exists = await WORKERS_KV_LINKS.get(random_data);
    if (exists) {
      throw new Error('Collision!');
    } else {
      return random_data;
    }
  } catch(e) {
    i++;
    return await generate_rand(i);
  }

}

async function handleRequest(request) {

  var request_url = new URL(request.url);

  short_url = request_url.pathname.split('/');

  if (short_url[1]) {

    var input = '';

    if (short_url.length > 1) {
      short_url.shift();
      input = short_url.join('/');
    } else {
      input = short_url[1];
    }

    var url = await WORKERS_KV_LINKS.get(input);

    if (url) {
      var requested_url = new URL(url);
      return Response.redirect(requested_url.toString(), 301);
    } else {
      return new Response(JSON.stringify({
        "Status" : 404,
        "Message" : 'Short url not found',
        "ShortUrl" : null
      }), {
        'status': 404,
        'statusText': 'Not found',
        'headers': { "Content-Type": "application/json" }
      });
    }

  } else {

    if (request_url.searchParams.get('new')) {

      try {

        var new_url = new URL(request_url.searchParams.get('new'));

        var rand_response = await fetch(new Request('https://csprng.xyz/v1/api?length=6'));
        var rand = await rand_response.json()

        try {
          var randomKey = await generate_rand();
        } catch(e) {
            return new Response(JSON.stringify({
              "Status" : 500,
              "Message" : e.message,
              "ShortUrl" : null
            }), {
              'status': 500,
              'statusText': 'Server error',
              'headers': { "Content-Type": "application/json" }
            });
        }

        var y = await WORKERS_KV_LINKS.put(randomKey, new_url.toString());

        var short_url = request_url.protocol + '//' + request_url.hostname + '/' + randomKey;

        return new Response(JSON.stringify({
          "Status" : 200,
          "Message" : "Successfully created new link",
          "ShortUrl" : short_url
        }), {
          'headers': { "Content-Type": "application/json" }
        });

      } catch (e) {
        return new Response(JSON.stringify({
          "Status" : 400,
          "Message" : e.message,
          "ShortUrl" : null
        }), {
          'status': 400,
          'statusText': 'Bad Request',
          'headers': { "Content-Type": "application/json" }
        });
      }

    } else {

      var info = '';
      info = info + '<h1>Cloudflare Workers Link Shortener</h1>';
      info = info + '<h2>Create a link</h2>';
      info = info + '<pre>$ curl ' + request_url.protocol + '//' + request_url.hostname + '/?new=https://cloudflare.com</pre>';

      return new Response(info, {
        'headers': { "Content-Type": "text/html" }
      });

    }

  }

}
	<!doctype html>
	<html lang="en">
	<head>
	<!-- Required meta tags -->
	<meta charset="utf-8">
	<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">

	<!-- Bootstrap CSS -->
	<link rel="stylesheet" href="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/css/bootstrap.min.css" integrity="sha384-ggOyR0iXCbMQv3Xipma34MD+dH/1fQ784/j6cY/iJTQUOhcWr7x9JvoRxT2MZw1T" crossorigin="anonymous">

	<title>Hello, world!</title>
	</head>
	<body>
	<h1>Cloudflare Workers Link Shortener</h1>
	<h2>Create a Link</h2>
	<pre>$ curl https://l.obez.uk/?new=https://cloudflare.com</pre>

	<!-- Optional JavaScript -->
	<!-- jQuery first, then Popper.js, then Bootstrap JS -->
	<script src="https://code.jquery.com/jquery-3.3.1.slim.min.js" integrity="sha384-q8i/X+965DzO0rT7abK41JStQIAqVgRVzpbzo5smXKp4YfRvH+8abtTE1Pi6jizo" crossorigin="anonymous"></script>
	<script src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.14.7/umd/popper.min.js" integrity="sha384-UO2eT0CpHqdSJQ6hJty5KVphtPhzWj9WO1clHTMGa3JDZwrnQq4sF86dIHNDz0W1" crossorigin="anonymous"></script>
	<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
	</body>
	</html>
	addEventListener('fetch', event => {
	event.respondWith(handleRequest(event.request))
	})

	async function generate_rand(i) { // recursively fetch randon values incase there is a collision

	if (typeof i == 'undefined') {
	i = 0;
	}

	if (i >= 5) {
	throw new Error('Limiting random key checks to 5');
	}

	try {
	var rand_response = await fetch(new Request('https://csprng.xyz/v1/api?length=6'));
	var rand = await rand_response.json();
	var random_data = rand.Data;
	var exists = await WORKERS_KV_LINKS.get(random_data);
	if (exists) {
	throw new Error('Collision!');
	} else {
	return random_data;
	}
	} catch(e) {
	i++;
	return await generate_rand(i);
	}

	}

	async function handleRequest(request) {

	var request_url = new URL(request.url);

	short_url = request_url.pathname.split('/');

	if (short_url[1]) {

	var input = '';

	if (short_url.length > 1) {
	short_url.shift();
	input = short_url.join('/');
	} else {
	input = short_url[1];
	}

	var url = await WORKERS_KV_LINKS.get(input);

	if (url) {
	var requested_url = new URL(url);
	return Response.redirect(requested_url.toString(), 301);
	} else {
	return new Response(JSON.stringify({
	"Status" : 404,
	"Message" : 'Short url not found',
	"ShortUrl" : null
	}), {
	'status': 404,
	'statusText': 'Not found',
	'headers': { "Content-Type": "application/json" }
	});
	}

	} else {

	if (request_url.searchParams.get('new')) {

	try {

	var new_url = new URL(request_url.searchParams.get('new'));

	var rand_response = await fetch(new Request('https://csprng.xyz/v1/api?length=6'));
	var rand = await rand_response.json()

	try {
	var randomKey = await generate_rand();
	} catch(e) {
	return new Response(JSON.stringify({
	"Status" : 500,
	"Message" : e.message,
	"ShortUrl" : null
	}), {
	'status': 500,
	'statusText': 'Server error',
	'headers': { "Content-Type": "application/json" }
	});
	}

	var y = await WORKERS_KV_LINKS.put(randomKey, new_url.toString());

	var short_url = request_url.protocol + '//' + request_url.hostname + '/' + randomKey;

	return new Response(JSON.stringify({
	"Status" : 200,
	"Message" : "Successfully created new link",
	"ShortUrl" : short_url
	}), {
	'headers': { "Content-Type": "application/json" }
	});

	} catch (e) {
	return new Response(JSON.stringify({
	"Status" : 400,
	"Message" : e.message,
	"ShortUrl" : null
	}), {
	'status': 400,
	'statusText': 'Bad Request',
	'headers': { "Content-Type": "application/json" }
	});
	}

	} else {

	var info = '';
	info = info + '<h1>Cloudflare Workers Link Shortener</h1>';
	info = info + '<h2>Create a link</h2>';
	info = info + '<pre>$ curl ' + request_url.protocol + '//' + request_url.hostname + '/?new=https://cloudflare.com</pre>';

	return new Response(info, {
	'headers': { "Content-Type": "text/html" }
	});

	}

	}

	}