euler

Project Euler solutions.

FastAPI endpoint

Install dependencies:

python3 -m pip install -r requirements.txt

Run the API:

uvicorn api:app --reload

Run it so other machines on your network can reach it:

.venv/bin/uvicorn api:app --host 0.0.0.0 --port 8000

Run it with local HTTPS on port 8443 after placing certificates in ~/.config/euler-api/tls/:

.venv/bin/uvicorn api:app --host 0.0.0.0 --port 8443 \
  --ssl-keyfile ~/.config/euler-api/tls/euler-local-server.key \
  --ssl-certfile ~/.config/euler-api/tls/euler-local-server.crt

Fetch the code for a problem number:

curl http://127.0.0.1:8000/problems/8

Optionally filter by language when multiple implementations exist:

curl "http://127.0.0.1:8000/problems/204?language=python"

systemd user service

Install the service:

mkdir -p ~/.config/systemd/user
cp euler-api.service ~/.config/systemd/user/euler-api.service
systemctl --user daemon-reload
systemctl --user enable --now euler-api.service

Check status:

systemctl --user status euler-api.service

From another machine on the same network, open:

http://<headless-machine-ip>:8000/docs

Local HTTPS on a LAN IP

Before starting the HTTPS service, place these files in ~/.config/euler-api/tls/:

euler-local-server.key
euler-local-server.crt
euler-local-ca.crt

Install and start the HTTPS service:

mkdir -p ~/.config/systemd/user
cp euler-api-https.service ~/.config/systemd/user/euler-api-https.service
systemctl --user daemon-reload
systemctl --user enable --now euler-api-https.service

The service will listen on:

https://192.168.1.41:8443/

Trust the local CA on the GUI machine using this certificate:

~/.config/euler-api/tls/euler-local-ca.crt

Without trusting that CA, the browser will show a certificate warning.