优化连接相关代码

internal/nodes/client_conn.go

@@ -222,7 +222,11 @@ func (this *ClientConn) SetReadDeadline(t time.Time) error {
 			return nil
 		}
 		this.readDeadlineTime = unixTime
-		if -time.Since(t) < HTTPIdleTimeout-1*time.Second {
+		var seconds = -time.Since(t)
+		if seconds <= 0 || seconds > HTTPIdleTimeout {
+			return nil
+		}
+		if seconds < HTTPIdleTimeout-1*time.Second {
 			this.isShortReading = true
 		}
 	}

internal/nodes/node.go

@@ -898,9 +898,9 @@ func (this *Node) listenSock() error {
 							lastErrString = lastErr.Error()
 						}
 					}
-					var age int64
-					var lastReadAge int64
-					var lastWriteAge int64
+					var age int64 = -1
+					var lastReadAge int64 = -1
+					var lastWriteAge int64 = -1
 					var currentTime = time.Now().Unix()
 					if createdAt > 0 {
 						age = currentTime - createdAt