add debug info for ghttp.Server

.travis.yml

@@ -11,6 +11,7 @@ branches:
   - staging
 
 env:
+- GF_DEV=1
 - GO111MODULE=on
 
 services:

net/ghttp/ghttp_server_router_serve.go

@@ -9,6 +9,7 @@ package ghttp
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/gogf/gf/internal/intlog"
 	"strings"
 
 	"github.com/gogf/gf/container/glist"
@@ -30,6 +31,7 @@ func (s *Server) getHandlersWithCache(r *Request) (parsedItems []*handlerParsedI
 		if parsedItems != nil {
 			return &handlerCacheItem{parsedItems, hasHook, hasServe}
 		}
+		intlog.Printf("cannot find HTTP handler for: %s, %s, %s, %v", r.Method, r.URL.Path, r.GetHost(), s.serveTree)
 		return nil
 	}, s.config.RouterCacheExpire*1000)
 	if value != nil {