// PROVIDED: form, mux, and listener. Complete only the two handlers. package main import ( "fmt" "net/http" "os" "strings" ) const form = `` func rootHandler(w http.ResponseWriter, r *http.Request) { // TODO: implement rootHandler. _ = form if r.URL.Path != "/" { w.WriteHeader(http.StatusNotFound) return } fmt.Fprint(w, form) } func generateHandler(w http.ResponseWriter, r *http.Request) { _ = strings.ToUpper // TODO: implement generateHandler. text := r.FormValue("text") if text == "" { w.WriteHeader(http.StatusBadRequest) return } if text == "panic" { w.WriteHeader(http.StatusInternalServerError) return } fmt.Fprint(w, strings.ToUpper(text)) } func main() { mux := http.NewServeMux() mux.HandleFunc("/", rootHandler) mux.HandleFunc("/generate", generateHandler) port := os.Getenv("PORT") if port == "" { port = "8080" } if err := http.ListenAndServe("127.0.0.1:"+port, mux); err != nil { fmt.Fprintln(os.Stderr, err) os.Exit(1) } }