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

[ganlvtech]

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)
	}

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