Python Basic Tutorial Summary 15--5 Virtual Tea Party

Chat server:

The server can accept multiple connections from different users;

Allows simultaneous (parallel) operation of the user;

Can explain commands, for example, say or logout;

Easy to expand

1. Initial implementation

1.1 Charserver Class

There is a problem ........

#servers that can accept connections fromAsyncoreImportDispatcherImportAsyncore,socketclassChatserver (Dispatcher):defhandle_accept (self): conn.addr=self.accept ()Print 'Connection attempt from', addr[0] #客户端的Ip地址s=chatserver () s.create_socket (socket.af_inet, socket. SOCK_STREAM)#Creating SocketsS.bind ((' ', 5005))#binds a socket to a port, an empty string (hostname), which means the local host (that is, all local interfaces) with a port number of 5005S.listen (5)#告诉服务器要监听连接, and specify 5 connected things for the agentAsyncore.loop () #启动服务器, cyclic monitoring

#basic server with clean-up capability fromAsyncoreImportDispatcherImportsocket, Asyncoreport=5005classChatserver (Dispatcher):def __init__(Self,port): Dispatcher.__init__(self) self.create_socket (socket.af_inet, socket. SOCK_STREAM) self.set_reuse_addr () Self.bind ((' ', Port)) Self.listen (5)    defhandle_accept (self): conn, addr=self.accept ()Print 'Connection attempt from', Addr[0]if __name__=="__main__": S=chatserver (PORT)Try: Asyncore.loop ()exceptKeyboardinterrupt:Pass

1.2 Charsession Class

1) The Set_terminator method is used to set the line termination object to the "\ r \ n" typically used as a terminator in the network protocol.

2) The Chatsession object will save the currently read data as a string list. However, when more data is read, Collect_incoming_data is automatically called to append the newly read data to the list.

3) The Found_terminiator method is called when it reads to the terminating object

4) Chatserver Save reply list

5) Charserver's Handle_accept method now creates a new Chatsession object and appends it to the session list

#server programs with the Chatsession class fromAsyncoreImportDispatcher fromAsynchatImportAsync_chatImportSocket,asyncoreport=5005classchatsession (async_chat):def __init__(Self,sock): Async_chat.__init__(Self,sock) self.set_terminator ("\ r \ n") Self.data=[]    defCollect_incoming_data (self,data): self.data.append (data)defFound_terminator (self): line=' '. Join (self.data) Self.data=[]        #process the row data        Print LineclassChatserver (Dispatcher):def __init__(self,port): Diapatcher.__init__(self) self.create_socket (socket.af_inet,socket. SOCK_STREAM) self.set_reuse_addr () Self.bind ((' '. Port)) Self.listen (5) Self.sessions=[]    defhandle_accept (self): conn,addr=self.accept () self.sessions.append (chatsession (COM))if __name__=='__main__': S=chatserver (PORT)Try: Asyncore.loop ()exceptKeyboardinterrupt:Print

1.3 Integration

Python Basic Tutorial Summary 15--5 Virtual Tea Party