Python服务器即时断开连接

Question

Here's the code giving me the issue:

def connect():
    s.listen(2)
    print("Server listening")
    conn,addr=s.accept()
    print("Connected with " + str(addr) + '\n')
    recv()

def recv():
    while 1:
        try:
            print("Starting try statement")
            data=conn.recv(1024)
            if data == "":
                print("No data")
                recv()
            else:
                print("Data")
                print(data.decode('UTF-8') + " -END")
                recv()
        except:
            print("No connection")
            connect()
        conn.close()

When I execute the code, it'll connect to the client and be ready to receive a message at any point. However, once it's executed this is what appears.

Server listening
Connected with ('xx.xxx.xxx.xx', xxxxx)

Starting try statement
No connection
Server listening

IP censored. Does anyone have a fix for this?

EDIT: Typo

CLIENT CODE (From TKinter GUI)

    s.connect((host,port))
        self.chatlog['state'] = NORMAL
        self.chatlog.insert(END, ("===CONNECTED TO SERVER\n"))
        self.chatlog['state'] = DISABLED
        self.chatlog.yview(END)
        self.conn=True
        print("Connected")

Answer 1

You are doing it wrong.

Ya 'now that local conn what you are creating in function connect is not accessible from function recv? That is a reason for not reciving anything.

My solution using that code, without using classes and threads but with select and sys module is:

import sys
import select

def connect()
    s.listen(2)
    print('Sever listening')
    inputs = [s, sys.stdin]
    running = 1
    while running:
        i_rdy = select.select(inputs,[],[],1)[0]

        if s in i_rdy:
            conn, addr = s.accept()
            print ('Connected with ' + str(addr) + '\n')
            recv(conn)

        if sys.stdin in i_rdy:
            junk = std.stdin.readline()
            if junk.lstrip('\n') == 'exit':
                running = 0
                print('Closing server')

    s.close()

def recv(conn):
    while 1:
        try:
            print("Starting try statement")
            data = conn.recv(1024)
            if data == "":
                print("No data")

            else:
                print("Data")
                print(data.decode('UTF-8') + " -END")

        except:
            print("No connection")
            #traceback
            print(sys.exc_info)
            break
    try:
        conn.close()
    except:
        pass

As you can see can "exit" when u type exit to console but only when there is no active connection...

That why you should consider rewrite this to classes, it would be a lot easier to stop, not "ugly" and it could handle multiple connections.