Url shortener

Url shortener app with an API + web frontend, made in Python using Django and its ORM model, featuring a user panel where links are managed, custom paths, and QR code generation. Deployed with the CDK for Terraform on Azure Container Apps and more

By using the free tier of Azure Container Apps and the Azure SQL free offer this project can be deployed for free:

https://learn.microsoft.com/en-us/azure/azure-sql/database/free-offer?view=azuresql

The project structure is split into two, the app folder which was created using this django template:

django-admin startproject urlshortener
cd urlshortener
python manage.py startapp webapp 

and the infra folder which was created using this cdktf template:

cdktf init --template=typescript --providers=azurerm --local

Setup instructions

Regardless of how you deploy this app, there are some environment variables that should be set in production, for development you don't need to set anything and default debug options will be used

Environment variables

For production you should turn off the debug mode, set a secret key and which domains the app will be served from

DJANGO_KEY=(secret key)
DJANGO_DEBUG=false
DJANGO_HOSTS=example.com,www.example.com
DJANGO_CSRF=https://example.com,https://www.example.com

To generate the secret key you can use a service like https://djecrety.ir/ or a password manager, note that it should be at least 50 characters

Setting DB_EXTERNAL=true will allow you to set the following, with the default values:

DB_ENGINE=mssql
DB_NAME=database
DB_USER=root
DB_PASSWORD=password
DB_HOST=example.database.windows.net
DB_PORT=1433

Otherwise, a db.sqlite3 file will be created at the root of the project (where manage.py is)

See the app/urlshortener/settings.py file for more info

Install the app

There are several options for installing the app, here is a non exhaustive list:

CDK for Terraform

For this approach you will need cdktf-cli: https://developer.hashicorp.com/terraform/tutorials/cdktf/cdktf-install

Running ckdtf deploy will automagically deploy this application to Azure, cdktf destroy will delete the provisioned resources

The CI/CD pipleine of this repository does this for you

Docker

For this approach you will need Docker: https://www.docker.com

Running docker compose up will build the Dockerfile in the current directory and start 3 containers, the python app, a mssql database and an nginx static file server

Alternatively, you can run just the python app like this:

docker build -t urlshortener:latest .
docker run --name urlshortener -d --restart unless-stopped -p 8000:8000 urlshortener:latest

If you're deploying to the cloud, make sure you build for the right platform e.g --platform linux/amd64

Manual installation

For this approach you will need Python (and pip): https://www.python.org/

to get started install the dependencies

pip install -r requirements.txt

Then this command to apply them

python manage.py migrate

Now you're ready to start the server, you may use the built in development server

python manage.py runserver

or gunicorn which is used in the docker image

gunicorn urlshortener.wsgi

Visit the website

If you started the app locally you can see it at http://127.0.0.1:8000/

Otherwise visit your domain e.g https://example.com/

To create the admin user run this from the root of the project

python manage.py createsuperuser

Then you will be able to login with those credentials at https://example.com/admin/

Notes

When changing the database model run this command to create a migration file, then run the migrate command

python manage.py makemigrations webapp

This project was tested with Python 3.12, Terraform 1.9.5, and django 4.2, if you encounter any errors with newer versions do try to patch them up

Thanks to

https://github.com/davidshimjs/qrcodejs