Simply Shorten

What is it?

A simple selfhosted URL shortener with no unnecessary features.

Don't worry if you see no activity for a long time. I consider this project to be complete, not dead. I'm unlikely to add any new features, but I will try and fix every bug you report.

If you feel like a feature is missing, please let me know by creating an issue using the "feature request" template.

But why another URL shortener?

I've looked at a couple popular URL shorteners, however they either have unnecessary features, or they didn't have all the features I wanted.

Features

• Shortens URLs of any length to a fixed length, randomly generated string.
• (Optional) Allows you to specify the shortened URL instead of the generated one (Missing in a surprising number of alternatives).
• Opening the fixed length URL in your browser will instantly redirect you to the correct long URL (you'd think that's a standard feature, but apparently it's not).
• Provides a simple API for adding new short links.
• Counts number of hits for each short link in a privacy respecting way i.e. only the hit is recorded, and nothing else.
• Allows setting the URL of your website, in case you want to conveniently generate short links locally.
• Links are stored in an SQLite database.
• Available as a Docker container.
• Backend written in Java using Spark Java, frontend written in plain HTML and vanilla JS, using Pure CSS for styling.

Bloat that will not be implemented

• Tracking or spying of any kind. The only logs that still exist are errors printed to stderr and the default SLF4J warning.
• User management. If you need a shortener for your whole organisation, either run separate containers for everyone or use something else.
• Cookies, newsletters, "we value your privacy" popups or any of the multiple other ways modern web shows how anti-user it is. We all hate those, and they're not needed here.
• Paywalls or messages begging for donations. If you want to support me (for whatever reason), you can message me through GitLab issues.

Screenshot

Usage

Using docker compose (Recommended method)

There is a sample compose.yaml file in this repository. It contains everything needed for a basic install. You can use it as a base, modifying it as needed. Run it with

docker compose up -d

If you're using a custom location for the db_url, make sure to make that file before running the docker image, as otherwise a directory will be created in its place, resulting in an error.

Building from source

Clone this repository

git clone https://gitlab.com/SinTan1729/simply-shorten

Note that Gradle 6.x.x and JDK 11 are required. Other versions are not tested

1. Build the .jar file

gradle build --no-daemon

The --no-daemon option means that gradle should exit as soon as the build is finished. Without it, gradle would still be running in the background in order to speed up future builds.

2. Set environment variables

# Required for authentication
export username=<api username>
export password=<api password>
# Sets where the database exists. Can be local or remote (optional)
export db_url=<url> # Default: './urls.sqlite'
# Sets the url of website, so that it displays that even when accessed
# locally (optional, defaults to hostname you're accessing it on)
export site_url=<url>

3. Run it

java -jar build/libs/url.jar

You can optionally set the port the server listens on by appending --port=[port]

4. Navigate to http://localhost:4567 in your browser, add links as you wish.

Running with docker

docker run method

0. (Only if you really want to) Build the image

docker build . -t simply-shorten:latest

1. Run the image

docker run -p 4567:4567
    -d url:latest
    -e username="username"
    -e password="password"
    -d simply-shorten:latest

1.a Make the database file available to host (optional)

touch ./urls.sqlite
docker run -p 4567:4567 \
    -e username="username" \
    -e password="password" \
    -v ./urls.sqlite:/urls.sqlite \
    -e db_url=/urls.sqlite \
    -d simply-shorten:latest

1.b Further, set the URL of your website (optional)

touch ./urls.sqlite
docker run -p 4567:4567 \
    -e username="username" \
    -e password="password" \
    -v ./urls.sqlite:/urls.sqlite \
    -e db_url=/urls.sqlite \
    -e site_url="https://www.example.com" \
    -d simply-shorten:latest

Disable authentication

As requested in #5, it is possible to completely disable the authentication. This if not recommended, as it will allow anyone to create new links and delete old ones. This might not seem like a bad idea, until you have hundreds of links pointing to illegal content. Since there are no logs, it's impossible to prove that those links aren't created by you.

If you still want to do it, then you need to set an environment variable to an exact value:

INSECURE_DISABLE_PASSWORD=I_KNOW_ITS_BAD

Any other value will not work.

Notes

• This is a fork of this project.
• The list of adjectives and names used for random short url generation is a modified version of this list used by docker.