Question

我有python服务器通过TCP连接服务多个Android客户端。客户端成功连接到服务器并向服务器发送消息，但是它们无法接收服务器的响应（如果它不是回显它们发送的原始消息）。客户端上的阻塞mServerMessage = mBufferIn.readLine();一直阻塞，无法捕获服务器的回复。我无法理解我做错了什么。服务器代码：

import socket
import thread
import time

TCP_IP = '192.168.1.105'
TCP_PORT = 5004

BUFFER_SIZE = 20  # Normally 1024, but we want fast response
NUMBER_OF_CLIENTS = 2

def on_new_client(clientsocket,addr):
    while True:
        msg = clientsocket.recv(BUFFER_SIZE) 
        if not msg: break
        print addr, ' >> ', msg, '\n'
        #msg = raw_input('SERVER >> ')
        clientsocket.send(msg) #If I sent anything other than the original message (for example: clientsocket.send(bytes("ss")) or clientsocket.send("ss")) the client fails to capture it!!

    clientsocket.close()


s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)


print 'Server started!'
print 'Waiting for clients...'

s.bind((TCP_IP, TCP_PORT))
s.listen(NUMBER_OF_CLIENTS) 


while True:
    conn, addr = s.accept() # Establish connection with client.
    print 'Got connection from', addr
    thread.start_new_thread(on_new_client,(conn,addr))

s.close()

客户代码：

InetAddress serverAddr = InetAddress.getByName(home.SERVER_IP);

Log.i("TCP Client", "C: Connecting...");

//create a socket to make the connection with the server
Socket socket = new Socket(serverAddr, SERVER_REQUESTS_PORT);

try {

    //sends the message to the server
    mBufferOut = new PrintWriter(new BufferedWriter(new OutputStreamWriter(socket.getOutputStream())), true);

    //receives the message which the server sends back -> the number of clients remaining
    mBufferIn = new BufferedReader(new InputStreamReader(socket.getInputStream()));

    Log.i("tcpClient", "mBufferIN" + String.valueOf(mBufferIn));

    mServerMessage = mBufferIn.readLine();
    //home.remainingCount.setText(mServerMessage);
    Log.i("tcpClient", "mBufferIN = " + mServerMessage); //This is never excuted when the message 
    counterValueRetrieved = true;

    while (mRun) {


        if (mServerMessage != null && mMessageListener != null) {
            //call the method messageReceived from MyActivity class
            mMessageListener.messageReceived(mServerMessage);
        }

    }

    Log.i("RESPONSE FROM SERVER", "S: Received Message: '" + mServerMessage + "'");

} catch (Exception e) {

    Log.i("TCP", "S: Error", e);

} finally {
    //the socket must be closed. It is not possible to reconnect to this socket
    // after it is closed, which means a new socket instance has to be created.
    socket.close();
}

} catch (Exception e) {

Log.e("TCP", "C: Error", e);

}

请注意

// used to send messages
private PrintWriter mBufferOut;
// used to read messages from the server
private BufferedReader mBufferIn;

有什么问题？

Answer 1

您的客户尝试读取行。行是以\ n。

结尾的字符串

clientsocket.send(bytes("ss"))

所以你应该发一条线：

clientsocket.send(bytes("ss\n"))

TCP客户端不接收服务器的消息

1 个答案: