add KeepAlive configuration for ghttp.Server

g/net/ghttp/ghttp_server_config.go

@@ -46,6 +46,7 @@ type ServerConfig struct {
     IdleTimeout       time.Duration         // 等待超时
     MaxHeaderBytes    int                   // 最大的header长度
     TLSConfig         tls.Config
+    KeepAlive         bool
 
     // 静态文件配置
     IndexFiles        []string              // 默认访问的文件列表
@@ -96,6 +97,7 @@ var defaultServerConfig = ServerConfig {
     WriteTimeout      : 60 * time.Second,
     IdleTimeout       : 60 * time.Second,
     MaxHeaderBytes    : 1024,
+    KeepAlive         : true,
 
     IndexFiles        : []string{"index.html", "index.htm"},
     IndexFolder       : false,
@@ -316,6 +318,15 @@ func (s *Server) SetRouterCacheExpire(expire int) {
     s.config.RouterCacheExpire = expire
 }
 
+// 设置KeepAlive
+func (s *Server) SetKeepAlive(enabled bool) {
+    if s.Status() == SERVER_STATUS_RUNNING {
+        glog.Error(gCHANGE_CONFIG_WHILE_RUNNING_ERROR)
+        return
+    }
+    s.config.KeepAlive = enabled
+}
+
 // 获取WebServer名称
 func (s *Server) GetName() string {
     return s.name

g/net/ghttp/ghttp_server_graceful.go

@@ -21,9 +21,9 @@ import (
 
 // 优雅的Web Server对象封装
 type gracefulServer struct {
-    fd           uintptr
-    addr         string
-    httpServer   *http.Server
+    fd           uintptr      // 热重启时传递的socket监听文件句柄
+    addr         string       // 监听地址信息
+    httpServer   *http.Server // 底层http.Server
     rawListener  net.Listener // 原始listener
     listener     net.Listener // 接口化封装的listener
     isHttps      bool         // 是否HTTPS
@@ -45,7 +45,7 @@ func (s *Server) newGracefulServer(addr string, fd...int) *gracefulServer {
 
 // 生成一个底层的Web Server对象
 func (s *Server) newHttpServer(addr string) *http.Server {
-    return &http.Server {
+    server := &http.Server {
         Addr           : addr,
         Handler        : s.config.Handler,
         ReadTimeout    : s.config.ReadTimeout,
@@ -53,6 +53,8 @@ func (s *Server) newHttpServer(addr string) *http.Server {
         IdleTimeout    : s.config.IdleTimeout,
         MaxHeaderBytes : s.config.MaxHeaderBytes,
     }
+    server.SetKeepAlivesEnabled(s.config.KeepAlive)
+    return server
 }
 
 // 执行HTTP监听