处理一些异常

graceful.go

@@ -88,7 +88,7 @@ type endlessServer struct {
 }
 
 /*
-NewServer returns an intialized endlessServer Object. Calling Serve on it will
+NewServer returns an initialized endlessServer Object. Calling Serve on it will
 actually "start" the server.
 */
 func NewServer(addr string, handler http.Handler) (srv *endlessServer) {
@@ -191,7 +191,7 @@ handler to reply to them. Handler is typically nil, in which case the
 DefaultServeMux is used.
 
 In addition to the stl Serve behaviour each connection is added to a
-sync.Waitgroup so that all outstanding connections can be served before shutting
+sync.WaitGroup so that all outstanding connections can be served before shutting
 down the server.
 */
 func (srv *endlessServer) Serve() (err error) {
@@ -226,7 +226,9 @@ func (srv *endlessServer) ListenAndServe() (err error) {
 	srv.EndlessListener = newEndlessListener(l, srv)
 
 	if srv.isChild {
-		syscall.Kill(syscall.Getppid(), syscall.SIGTERM)
+		if err = syscall.Kill(syscall.Getppid(), syscall.SIGTERM); nil != err {
+			return err
+		}
 	}
 
 	srv.BeforeBegin(srv.Addr)
@@ -277,7 +279,9 @@ func (srv *endlessServer) ListenAndServeTLS(certFile, keyFile string) (err error
 	srv.EndlessListener = tls.NewListener(srv.tlsInnerListener, config)
 
 	if srv.isChild {
-		syscall.Kill(syscall.Getppid(), syscall.SIGTERM)
+		if err = syscall.Kill(syscall.Getppid(), syscall.SIGTERM); nil != err {
+			return err
+		}
 	}
 
 	log.Println(syscall.Getpid(), srv.Addr)
@@ -497,8 +501,12 @@ func (el *endlessListener) Accept() (c net.Conn, err error) {
 		return
 	}
 
-	tc.SetKeepAlive(true)                  // see http.tcpKeepAliveListener
-	tc.SetKeepAlivePeriod(3 * time.Minute) // see http.tcpKeepAliveListener
+	if err = tc.SetKeepAlive(true); nil != err {
+		return nil, err
+	} // see http.tcpKeepAliveListener
+	if err = tc.SetKeepAlivePeriod(3 * time.Minute); nil != err {
+		return nil, err
+	} // see http.tcpKeepAliveListener
 
 	c = endlessConn{
 		Conn:   tc,