Parse server's addr before use it

config/server.go

@@ -3,6 +3,7 @@ package config
 import (
 	"os"
 	"strconv"
+	"strings"
 
 	"github.com/imdario/mergo"
 	"github.com/kataras/fasthttp"
@@ -51,6 +52,37 @@ type Server struct {
 	Virtual bool
 }
 
+// ServerParseAddr parses the listening addr and returns this
+func ServerParseAddr(listeningAddr string) string {
+	// check if addr has :port, if not do it +:80 ,we need the hostname for many cases
+	a := listeningAddr
+	if a == "" {
+		// check for os environments
+		if oshost := os.Getenv("HOST"); oshost != "" {
+			a = oshost
+		} else if oshost := os.Getenv("ADDR"); oshost != "" {
+			a = oshost
+		} else if osport := os.Getenv("PORT"); osport != "" {
+			a = ":" + osport
+		}
+
+		if a == "" {
+			a = DefaultServerAddr
+		}
+
+	}
+	if portIdx := strings.IndexByte(a, ':'); portIdx == 0 {
+		// if contains only :port	,then the : is the first letter, so we dont have setted a hostname, lets set it
+		a = DefaultServerHostname + a
+	}
+	if portIdx := strings.IndexByte(a, ':'); portIdx < 0 {
+		// missing port part, add it
+		a = a + ":80"
+	}
+
+	return a
+}
+
 // DefaultServer returns the default configs for the server
 func DefaultServer() Server {
 	return Server{ListeningAddr: DefaultServerAddr,