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  • socketserver官方源码例子转

    This is the server side:

    import socketserver
    
    class MyTCPHandler(socketserver.BaseRequestHandler):
        """
        The request handler class for our server.
    
        It is instantiated once per connection to the server, and must
        override the handle() method to implement communication to the
        client.
        """
    
        def handle(self):
            # self.request is the TCP socket connected to the client
            self.data = self.request.recv(1024).strip()
            print("{} wrote:".format(self.client_address[0]))
            print(self.data)
            # just send back the same data, but upper-cased
            self.request.sendall(self.data.upper())
    
    if __name__ == "__main__":
        HOST, PORT = "localhost", 9999
    
        # Create the server, binding to localhost on port 9999
        with socketserver.TCPServer((HOST, PORT), MyTCPHandler) as server:
            # Activate the server; this will keep running until you
            # interrupt the program with Ctrl-C
            server.serve_forever()
    View Code

    An alternative request handler class that makes use of streams (file-like objects that simplify communication by providing the standard file interface):

    class MyTCPHandler(socketserver.StreamRequestHandler):
    
        def handle(self):
            # self.rfile is a file-like object created by the handler;
            # we can now use e.g. readline() instead of raw recv() calls
            self.data = self.rfile.readline().strip()
            print("{} wrote:".format(self.client_address[0]))
            print(self.data)
            # Likewise, self.wfile is a file-like object used to write back
            # to the client
            self.wfile.write(self.data.upper())
    View Code

    The difference is that the readline() call in the second handler will call recv() multiple times until it encounters a newline character, while the single recv() call in the first handler will just return what has been sent from the client in one sendall() call.

    This is the client side:

    import socket
    import sys
    
    HOST, PORT = "localhost", 9999
    data = " ".join(sys.argv[1:])
    
    # Create a socket (SOCK_STREAM means a TCP socket)
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
        # Connect to server and send data
        sock.connect((HOST, PORT))
        sock.sendall(bytes(data + "
    ", "utf-8"))
    
        # Receive data from the server and shut down
        received = str(sock.recv(1024), "utf-8")
    
    print("Sent:     {}".format(data))
    print("Received: {}".format(received))
    View Code
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  • 原文地址:https://www.cnblogs.com/superniao/p/10095083.html
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