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package main
import (
"errors"
"net/http"
"github.com/go-chi/chi/v5"
)
type Handler func(w http.ResponseWriter, r *http.Request) error
func (h Handler) ServeHTTP(w http.ResponseWriter, r *http.Request) {
if err := h(w, r); err != nil {
// handle returned error here.
w.WriteHeader(503)
w.Write([]byte("bad"))
}
}
func main() {
r := chi.NewRouter()
r.Method("GET", "/", Handler(customHandler))
http.ListenAndServe(":3333", r)
}
func customHandler(w http.ResponseWriter, r *http.Request) error {
q := r.URL.Query().Get("err")
if q != "" {
return errors.New(q)
}
w.Write([]byte("foo"))
return nil
}
|
