if _,ok := Header["Accept"];!ok {Header["Accept"] = `text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8`}
if _,ok := Header["Connection"];!ok {Header["Connection"] = "keep-alive"}
if _,ok := Header["Accept-Encoding"];!ok {Header["Accept-Encoding"] = "gzip, deflate, br"}
+ if SaveToPath != "" {Header["Accept-Encoding"] = "identity"}
if _,ok := Header["User-Agent"];!ok {Header["User-Agent"] = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/75.0.3770.142 Safari/537.36"}
for k,v := range Header {