Flint Framework — Compatibility Report

Full compatibility achieved with Go's standard library

Problem Definition

In the previous version of Flint, the design of Router and HandlerFunc was not fully compatible with Go's standard library (net/http).

Specifically, Flint did not implement the http.Handler interface, which meant it could not be used directly with:

http.Handle("/", router)
http.ListenAndServe(":8080", router)

This limitation prevented Flint from integrating smoothly with the existing stdlib ecosystem, including third-party libraries such as logging, middleware, and monitoring packages.

Impact on Users

Flint could only be run using its own Server implementation.
The standard Go approach based on http.Handler was not supported.
As a result, services built with Flint faced difficulties integrating with other libraries.

Solution

The issue was caused by the fact that the Router type did not implement the ServeHTTP(w http.ResponseWriter, r *http.Request) method.

In the new version:

Router now directly implements the http.Handler interface.
Flint preserves its HandlerFunc → Context design while exposing http.Handler compatibility externally.
This allows Flint to be used like:
http.ListenAndServe(":8080", app.Router())

Tests

Compatibility was validated with the following scenarios:

4.1 Usage with Flint Server

                app := flint.NewServer()
app.Get("/", func(ctx *flint.Context) {
    ctx.String(200, "Hello World")
})
app.Run(":8080")
            

4.2 Usage with Stdlib

                r := flint.NewRouter()
r.Handle("/", func(ctx *flint.Context) {
    ctx.String(200, "Hello from stdlib")
})

http.Handle("/", r)
http.ListenAndServe(":8080", nil)
            

Both scenarios executed successfully.

Conclusion

Flint Framework is now fully compatible with Go's standard library.
Users can choose between Flint's Server conveniences or the direct stdlib http.Handler approach.
With this update, Flint has become easier to integrate into the broader Go ecosystem.

Compatibility Achieved Ecosystem Expanded