Echo Server/Client Speaker：Fang
Outline 1.Echo Server/Client 2. TCP Sockets 3.Java Echo Server 4.Java Echo Client in Android 5.Demo
1.Echo Server/Client 目的 以Socket連接，互相溝通 Client送出字串給 Server
2.TCP Sockets Endpoint for communication Consists of the pair <IP address, Port> Port is between 1024 and 65535 TCP connection consists of a pair of sockets Server Listens on a port Client Requests for connection
2.TCP Sockets For example Client Server IP: 146.86.3.15 Port: 12345 Server IP: 146.86.5.20 Port: 80 Connection is uniquely identified by the socket pair <146.86.3.15 : 12345, 146.86.5.20 : 80>
3.Java Echo Server Flow Note: NoThread 聽一個特定的port，並等待client提出connection request 接受request，建立socket連線 藉由socket讀取來自client的string 藉由socket傳送一樣的string給client … 關閉與此client的socket連線 回到第一步驟，繼續等待 Note: NoThread 一次只能服務一個client
3.Java Echo Server Port 執行echo的動作
3.Java Echo Server 處理input 處理output
3.Java Echo Server
4.Echo Client in Android Flow Note: 指定Server IP與Port給socket，使用socket與server端之socket建立連線 透過socket傳送string給server 透過socket接收server傳回之echo string … 關閉與server之連線 Note: 需在AndroidManifest.xml中開放User Permission android.permission.INTERNET
4.Echo Client in Android 處理input 處理output 與server建立連線 將fromuser字串寫入socket中 從socket中讀出string
5.Demo
Thanks!