HTTP API for quickly generating QR codes
The interactive Swagger UI documentation is found here: https://qr.tuukka.net
Create a QR Code with a simple HTTP GET request. Since it's a GET request, it can be easily embedded in HTML or Markdown files just like this one.
This QR code:
is created like so:
No additional setup is needed. The image format is specified with the first path parameter, so no headers or body parameters are required, making it fully compatible with HTML/Markdown embedding. The content in the second path parameter could be a URL like in this example, a normal string, or some other URI. Here is a blog post about additional URI schemes QR codes. And here is a QR code to it:
The application itself is quite simple. It uses the qrcode Rust crate to generate the QR codes. The API is built using the Axum Rust web framework.
Docker is used to create the development and production environments. To minimize the size of the production image, the Alpine base image of Rust is used to build the binary. Musl, the C standard library implementation used in Alpine Linux, allows the creation of statically linked binaries. These statically linked binaries can run without external dependencies from the operating system, so they can also run in the empty scratch docker base image. As musl is used by default on Alpine and cargo can detect the build environment's system architecture, the same image can still be used to create multi-arch Docker images.