Test task: web-service to serve shorten URLs

Local run

To run service locally all you need is to run

make build

to build binary for your platform (it requires gcc compiler because it uses SQLLite).

Once it is completed you should have compiled binary jobtome in ./build/bin directory.
By default service uses local port 8080 to serve API requests and port 80 to serve redirects for short URLs.
By default all data will be stored in jobtome.dat file.
To start the service you need to run:

LOG_LEVEL=debug ./build/bin/jobtome

it will:

1. Instantiates SQLLite database instance and apply migration on top of it.
2. Run service acquiring ports 8080 and 80 to serve HTTP requests.

Once the service is ready you could try to check some basic info about it:

curl localhost:8080/-/version

To create a shorten please run:

curl -v -H 'Content-type: application/json' \
    -d '{"url": "https://google.com"}' \
    localhost:8080/api/shorten

To get newly created shorten:

curl -v localhost:8080/<Location>

where is the value returned in Location header of the previous operation result without leading slash.

To list set of shortens:

curl -v localhost:8080/api/shorten

To remove the shorten:

curl -v -X DELETE localhost:8080/<Location>

The flow described above is also available as an integration test that could be run by the command:

go test ./integration/...

Not covered:

• a counter of the shortened url redirections
• API endpoint to read shortened url redirections count
• no metrics exported
• no proper README.md file with listing of configuration settings supported
• the lack of test for functionality
• caching of the shortens to reduce the load on the database
• authorization and authentication of incoming requests
• no OpenAPI specification of the endpoints
• not the best hashing function (MD5)
• ... etc.