numerus/pkg/recover.go

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package pkg
import (
"net/http"
"runtime"
"log"
"fmt"
)
func Recoverer(next http.Handler) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
defer func() {
if r := recover(); r != nil {
if r == http.ErrAbortHandler {
panic(r);
}
err, ok := r.(error)
if ! ok {
err = fmt.Errorf("%v", r);
}
stack := make([]byte, 4 << 10);
length := runtime.Stack(stack, true)
log.Printf("PANIC - %v %s", err, stack[:length])
http.Error(w, err.Error(), http.StatusInternalServerError)
}
}();
next.ServeHTTP(w, r);
});
}