Nothing special - Set a server.Config field which can override the ListeningAddr when server.Host()/Port. Mostly used inside glb tmpl funcs

config/server.go

@@ -79,6 +79,13 @@ type Server struct {
 	RedirectTo string
 	// Virtual If this server is not really listens to a real host, it mostly used in order to achieve testing without system modifications
 	Virtual bool
+	// VListeningAddr, can be used for both virtual = true or false,
+	// if it's setted to not empty, then the server's Host() will return this addr instead of the ListeningAddr.
+	// server's Host() is used inside global template helper funcs
+	// set it when you are sure you know what it does.
+	//
+	// Default is empty ""
+	VListeningAddr string
 	// Name the server's name, defaults to "iris".
 	// You're free to change it, but I will trust you to don't, this is the only setting whose somebody, like me, can see if iris web framework is used
 	Name string
@@ -117,10 +124,15 @@ func ServerParseAddr(listeningAddr string) string {
 
 // DefaultServer returns the default configs for the server
 func DefaultServer() Server {
-	return Server{ListeningAddr: DefaultServerAddr, Name: DefaultServerName,
+	return Server{
+		ListeningAddr:      DefaultServerAddr,
+		Name:               DefaultServerName,
 		MaxRequestBodySize: DefaultMaxRequestBodySize,
 		ReadBufferSize:     DefaultReadBufferSize,
 		WriteBufferSize:    DefaultWriteBufferSize,
+		RedirectTo:         "",
+		Virtual:            false,
+		VListeningAddr:     "",
 	}
 }
 

http.go

@@ -303,13 +303,16 @@ func (s *Server) Listener() net.Listener {
 
 // Host returns the registered host for the server
 func (s *Server) Host() (host string) {
+	if s.Config.VListeningAddr != "" {
+		return s.Config.VListeningAddr
+	}
 	return s.Config.ListeningAddr
 }
 
 // Port returns the port which server listening for
 // if no port given with the ListeningAddr, it returns 80
 func (s *Server) Port() (port int) {
-	a := s.Config.ListeningAddr
+	a := s.Host()
 	if portIdx := strings.IndexByte(a, ':'); portIdx != -1 {
 		p, err := strconv.Atoi(a[portIdx+1:])
 		if err != nil {