package main;import("bufio";"context";"fmt";"net/http";"net/url";"os";"strings";"time")

func g(u string)(string,error){M:=[]struct{m string;t time.Duration}{{"HEAD",2*time.Second},{"GET",3*time.Second}}
ua:="Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/119.0.0.0 Safari/537.36"
c:=&http.Client{CheckRedirect:func(r *http.Request,v []*http.Request)error{return http.ErrUseLastResponse}}
for _,x:=range M{ctx,cl:=context.WithTimeout(context.Background(),x.t)
req,er:=http.NewRequestWithContext(ctx,x.m,u,nil);if er!=nil{cl();if x.m=="GET"{return"",er};continue}
req.Header.Set("User-Agent",ua);resp,er:=c.Do(req);if er!=nil{cl();if x.m=="GET"{return"",er};continue}
st:=resp.StatusCode;loc:=resp.Header.Get("Location");resp.Body.Close();cl()
if st>=300&&st<400&&loc!=""{return rU(resp.Request.URL.String(),loc),nil}
if x.m=="HEAD"{continue}};return"",nil}

func rU(b,r string)string{u,e:=url.Parse(r);if e!=nil{return r};if u.IsAbs(){return u.String()}
bu,er:=url.Parse(b);if er!=nil{return r};return bu.ResolveReference(u).String()}

func main(){rd:=bufio.NewReader(os.Stdin);fmt.Print("Kontrol edilecek URL: ")
i,er:=rd.ReadString('\n');if er!=nil{fmt.Println("Hata:",er);return}
u:=strings.TrimSpace(i);if u==""{fmt.Println("Boş URL veremezsiniz.");os.Exit(1)}
st:=time.Now();r,er:=g(u);et:=time.Since(st)
if er!=nil{fmt.Printf("Hata: %v\n",er);return}
if r==""{fmt.Println("Redirect yok veya Location header bulunamadı.")
fmt.Printf("\033[92mİşlem süresi: %.2f saniye\033[0m\n",et.Seconds());return}
fmt.Println("\nİlk redirect URL (url1 -> url2):");fmt.Println(r)
fmt.Printf("\n\033[92mİşlem süresi: %.2f saniye\033[0m\n",et.Seconds())}