update readme

README.md

@@ -5,11 +5,9 @@
 ## introdction ##
 ---
 
-Getty is a asynchronous network I/O library in golang. Getty is based on "ngo" whose author is sanbit(https://github.com/sanbit).
+Getty is a asynchronous network I/O library in golang. Getty is based on "ngo" whose author is sanbit(https://github.com/sanbit). Getty works on tcp/udp/websocket network protocol and supplies [a uniform interface](https://github.com/alexstocks/getty/blob/master/getty.go#L45).
 
-In getty there are two goroutines in one connection(session), one reads tcp stream/udp packet/websocket package,
-
-the other handles logic process and writes response into network write buffer. If your logic process may take a long time, you should start a new logic process goroutine by yourself in codec.go:(Codec)OnMessage.
+In getty there are two goroutines in one connection(session), one reads tcp stream/udp packet/websocket package, the other handles logic process and writes response into network write buffer. If your logic process may take a long time, you should start a new logic process goroutine by yourself in codec.go:(Codec)OnMessage.
 
 You can also handle heartbeat logic in codec.go:(Codec):OnCron. If you use tcp/udp, you should send hearbeat package by yourself, and then invoke session.go:(Session)UpdateActive to update its active time. Please check whether the tcp session has been timeout or not in codec.go:(Codec)OnCron by session.go:(Session)GetActive.
 

client.go

@@ -179,7 +179,7 @@ func (c *client) dialUDP() Session {
 			err = nil
 		}
 		if err != nil {
-			log.Info("conn{%#v}.Read() = err{%s}", conn, err)
+			log.Info("conn{%#v}.Read() = {length:%d, err:%s}", conn, length, err)
 			time.Sleep(connInterval)
 			continue
 		}