https://github.com/captaincluster/url-shortener-microservice

The third project for the "Back End Development and APIs" course provided by FreeCodeCamp.
https://github.com/captaincluster/url-shortener-microservice

backend expressjs freecodecamp freecodecamp-project microservice

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The third project for the "Back End Development and APIs" course provided by FreeCodeCamp.

• Host: GitHub
• URL: https://github.com/captaincluster/url-shortener-microservice
• Owner: CaptainCluster
• Created: 2024-05-06T21:14:16.000Z (6 months ago)
• Default Branch: main
• Last Pushed: 2024-05-07T15:44:49.000Z (6 months ago)
• Last Synced: 2024-05-08T17:08:52.646Z (6 months ago)
• Topics: backend, expressjs, freecodecamp, freecodecamp-project, microservice
• Language: JavaScript
• Homepage:
• Size: 10.7 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# URL Shortener Microservice

![Express.js](https://img.shields.io/badge/express.js-%23404d59.svg?style=for-the-badge&logo=express&logoColor=%2361DAFB)

URL Shortener Microservice is the 3rd project for FreeCodeCamp *Back End Development and APIs* course. A post request allows the reception of the URL

sent by the user and the allocation of an index. The index can then be used in a GET request, allowing a redirection to a page with a single number.

🙏 Credits

---

![FreeCodeCamp](https://img.shields.io/badge/Freecodecamp-%23123.svg?&style=for-the-badge&logo=freecodecamp&logoColor=green)

Everything **not** written by me has been cloned from [this GitHub repository](https://github.com/freeCodeCamp/boilerplate-project-urlshortener/).

The default README that comes with the cloned repository:

> This is the boilerplate code for the URL Shortener Microservice project. Instructions for building your project can be found at https://www.freecodecamp.org/learn/back-end-development-and-apis/back-end-development-and-apis-projects/url-shortener-microservice.

Here is the solution I wrote for this project:

```

const bodyParser = require("body-parser");

app.use(bodyParser.urlencoded({ extended: false }));

const existingUrls = [];

app.post("/api/shorturl", function(req, res, next)

{

  // Making sure the url is valid at first

  if(!req.body.url.includes("http"))

  {

    return res.json({

      error: "invalid url"

    });

  }

  next();   //Continuing with a valid url

},

function(req, res)

{

  if(existingUrls.includes(req.body.url))

  {

    return res.json({

      url: req.body.url,

      index: existingUrls.indexOf(req.body.url) + 1

    });

  }

  existingUrls.push(req.body.url);

  res.json({

    original_url: req.body.url,

    short_url: existingUrls.indexOf(req.body.url) + 1

  });

});

app.get("/api/shorturl/:shortUrl", function(req, res)

{

  if(existingUrls.length < req.params.shortUrl)

  {

    return res.json({

      error: "invalid url"

    });

  }

  res.redirect(existingUrls[Number(req.params.shortUrl) - 1]); 

});

```