proxy.Balancer middleware should handle http backend servers when using app.ListenTLS

[Ganlv]

need add req.URI().SetScheme("http") in proxy.Balancer

req.SetRequestURI(utils.UnsafeString(req.RequestURI())) 
// NOTE: if req.isTLS is true, SetRequestURI keeps the scheme as https. 
// Reference: https://github.com/gofiber/fiber/issues/1762 
if scheme := getScheme(utils.UnsafeBytes(copiedURL)); len(scheme) > 0 { 
	req.URI().SetSchemeBytes(scheme) 
} 

fiber/middleware/proxy/proxy.go

Lines 80 to 81 in 109ccdd

 req.SetRequestURI(utils.UnsafeString(req.RequestURI())) 
  

fiber/middleware/proxy/proxy.go

Lines 180 to 186 in 109ccdd

 copiedURL := utils.CopyString(addr) 
 req.SetRequestURI(copiedURL) 
 // NOTE: if req.isTLS is true, SetRequestURI keeps the scheme as https. 
 // Reference: https://github.com/gofiber/fiber/issues/1762 
 if scheme := getScheme(utils.UnsafeBytes(copiedURL)); len(scheme) > 0 { 
 	req.URI().SetSchemeBytes(scheme) 
 } 

[welcome]

Thanks for opening your first issue here! 🎉 Be sure to follow the issue template! If you need help or want to chat with us, join us on Discord https://gofiber.io/discord