StackOverflow2013

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primarykey
Id
11073608
data
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0
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2012-06-17T18:07:03.623
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2012-06-17T18:07:03.623
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4
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0
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text
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This post helped me get over the un-closed socket problem. I had the same problem and wanted to post here my simple implementation for TCP server class (and client method). I made a <code>TCPThreadedServer</code> class. In order to use it is needed to be inherited, and the method <code>process(msg)</code> must be overridden. the overridden method invokes every time the server gets a message <code>msg</code>, and if it returns a not <code>None</code> object, it will be returned as string to the connected client. <pre><code>from SocketServer import TCPServer, StreamRequestHandler, ThreadingMixIn import threading class TCPThreadedServer(TCPServer, ThreadingMixIn): class RequstHandler(StreamRequestHandler): def handle(self): msg = self.rfile.readline().strip() reply = self.server.process(msg) if reply is not None: self.wfile.write(str(reply) + '\n') def __init__(self, host, port, name=None): self.allow_reuse_address = True TCPServer.__init__(self, (host, port), self.RequstHandler) if name is None: name = "%s:%s" % (host, port) self.name = name self.poll_interval = 0.5 def process(self, msg): """ should be overridden process a message msg - string containing a received message return - if returns a not None object, it will be sent back to the client. """ raise NotImplemented def serve_forever(self, poll_interval=0.5): self.poll_interval = poll_interval self.trd = threading.Thread(target=TCPServer.serve_forever, args = [self, self.poll_interval], name = "PyServer-" + self.name) self.trd.start() def shutdown(self): TCPServer.shutdown(self) TCPServer.server_close(self) self.trd.join() del self.trd </code></pre> I found it quite easy to use: <pre><code>class EchoServerExample(TCPThreadedServer): def __init__(self): TCPThreadedServer.__init__(self, "localhost", 1234, "Server") def process(self, data): print "EchoServer Got: " + data return str.upper(data) for i in range(10): echo = EchoServerExample() echo.serve_forever() response = client("localhost", 1234, "hi-%i" % i) print "Client received: " + response echo.shutdown() </code></pre> I used the method: import socket <pre><code>def client(ip, port, msg, recv_len=4096, timeout=socket._GLOBAL_DEFAULT_TIMEOUT): msg = str(msg) response = None sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM) try: sock.connect((ip, port)) if timeout != socket._GLOBAL_DEFAULT_TIMEOUT: sock.settimeout(timeout) sock.send(msg + "\n") if recv_len > 0: response = sock.recv(recv_len) finally: sock.close() return response </code></pre> Enjoy it!
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1. POStart a TCPServer with ThreadingMixIn again in code directly after shutting it down. (Gives `Address already in use`)
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