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Shorty is a very small, self hosted, symfony application which provides short links instead of long urls. This makes url sharing really simple.

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Shorty

Shorty is a very small, self hosted, symfony application which provides short links instead of long urls. This makes url sharing really simple. So if you have a url like https://www.example.com/this/is/a/very/long/url/you?will&not&remeber you can give it to Shorty, and he will make an 8 character url from it. So the long url becomes to something like this: https://you-url.tld/9c6a8a7d

Motivation

This kind of application is nothing new to the world. Services like bit.ly or tinyurl do the same thing in a more professional way. So why should I build this kind of application by my self? There are several reasons for that, but the main reason is: "Because I can!" Further I needed a application to play with on google app engine. Furthermore its also a cool topic for a talk and it's really cool to have your own service that does url shortening for you.

Wabi-Sabi

For everyone who's new to this concept plz. take a look at this article. So what I want to say is, I know this application is not perfect and there are many things you can do in other or as you might think "better" ways. But this is totally ok and I'm fine with that. So if there is something you would like to change or optimize feel free to fork this repo and do it the way you prefer.

Setup

Local

To get Shorty up'n running follow these simple steps:

  • clone the repository
  • run composer install`
  • change the PUT_TOKEN inside the .env file to something you prefer
  • change the DELETE_TOKEN inside the .env file to something you prefer
  • run php bin/console doctrine:database:create to create the database
  • run php bin/console doctrine:migrations:migrate --no-interaction to setup the schema
  • navigate to /public and run the local PHP Server with php -S 127.0.0.1:8000

You can now open 127.0.0.1:8000 in your favorite browser and use Shorty.

On a real Server

If you want to use Shorty on a real server just go through the local setup steps on your machine except the local PHP server startup. You will need the sqlite php extension to interact with the database. Because Shorty uses redirects the symfony/apache-pack is pre installed. So if you're using apache2 you're ready to go. For nginx you have to ensure that the redirects are configured correctly and that the Authorization header is passed. Further I recommend to enable HTTPS on your server.

Usage

First run

After you setup Shorty successfully you can navigate to your shorting TLD (https://you-url.tld). Because there is nothing to do for Shorty, he will provide you a 418 HTTP Response. This is totally normal and tells you that Shorty is going out to have a cup of tea if there is some free time.

Create a short link

If you want that Shorty creates a short link for you, you have to send him a PUT request. The following example will show you how it works with curl in the terminal.

curl -X PUT -H 'Authorization: 5449f071773861dca4d3b459aa79fcf5' -d 'https://github.com/patrick-blom/shorty' http://127.0.0.1:8000
-X PUT: Tell curl to send a PUT request
-H 'Authorization: 5449f071773861dca4d3b459aa79fcf5': The token you provide under .env PUT_TOKEN (5449f071773861dca4d3b459aa79fcf5)
-d 'https://github.com/patrick-blom/shorty': The Url you want to short (must be a syntactical valid url)
http://127.0.0.1:8000: Your running Shorty

If the request is valid Shorty will provide you a 201 Created HTTP Response and an 8 characters long string which represents your link. In our example it's the string: 950a0065

If you provide a wrong authorisation token in the header or just something that is no url, Shorty will provide you a 400 HTTP Bad Request Response

Use a short link

Based on the example above we can now use the generated identifier in a expected way. So call http://127.0.0.1:8000/950a0065 in your browser. Shorty will now take the identifier and search for it in his database. If he finds a result he will pass a 301 HTTP Response including the original url back to the browser.

Delete a short link

Sometimes it happens that you pass something to Shorty you want to delete later. This can happen for several reasons. One reason could be that there is a typo in your very long url and you don't want to mess up the database. Another one could be, that you only want to share the short link for a limited amount of time. Never mind, there can always be a reason for the deletion of a short link. So if you want to delete a short link you have to send Shorty a DELETE request with the created short code. If we take the example from above, it would look like this.

curl -X DELETE -H 'Authorization: 5449f071773861dca4d3b459aa79fcf5' -d '950a0065' http://127.0.0.1:8000
-X DELETE: Tell curl to send a DELETE request
-H 'Authorization: 5449f071773861dca4d3b459aa79fcf5': The token you provide under .env DELETE_TOKEN (5449f071773861dca4d3b459aa79fcf5)
-d '950a0065': The short code which was created by Shorty during the PUT request
http://127.0.0.1:8000: Your running Shorty

You can also delete a short link by passing the short code to the path of the uri. This was added because a body on a DELETE call is not always accepted. E.g. Akamai does not allow DELETE requests which includes a body. The Authorization Header is always required.

curl -X DELETE -H 'Authorization: 5449f071773861dca4d3b459aa79fcf5' http://127.0.0.1:8000/950a0065

If everything works as expected, Shorty will return a 410 HTTP Gone Response. Otherwise you will end up with an 400 HTTP Bad Request Response.

Security

Shorty's defense is really simple. The only thing between the world and the database are your authorization tokens. So please keep the following recommendations in mind

  • choose long and complex tokens
  • never share your tokens
  • never use the same token for PUT and DELETE
  • always use HTTPS, if you can

Testing

Regular Testing

If you want to test Shorty you can this by simply run a regular composer install and composer test in the project root. This will install all the dev dependencies and runs the test suite consisting of phpstan, phpcs, phpmd and phpunit.

You can also test only parts of the suite by calling the composer commands separately:

  • composer phpstan
  • composer phpmd
  • composer phpcs
  • composer phpunit

Mutation Testing

To keep the quality of the tests high, Shorty uses mutation testing. The testing tool will be installed with composer dev dependencies. To execute the mutation tests you can simply run:

  • ./vendor/bin/infection

If you're not familiar with mutation testing checkout the infection page for more informations.

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Shorty is a very small, self hosted, symfony application which provides short links instead of long urls. This makes url sharing really simple.

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