Question

我的问题是：为什么我的客户没有收到来自我服务器的消息？我是否需要有线程客户端来发送和接收消息？

和其他许多人一样，我正在尝试进行UDP聊天。对于我的实现，我计划让用户通过服务器聊天。这意味着客户端将消息发送到服务器，服务器将其发送给连接到服务器的其他用户。为此，我在客户端实现了一个发送和接收线程。当我运行两个客户端和服务器时，我可以看到消息通过文本输出和wireshark流量发送到服务器。我还看到服务器尝试通过文本输出和wireshark将数据发送到其他客户端。我不是python 3的新手，但这是我第一次尝试socket编程和使用线程。

客户代码：

    # Filename: client.py

    # TODO list
    # Implement commands
    # States
    # Version Check

    import socket
    import threading
    import sys

    # Version
    VERSION = '1.0'

    # Set variables
    HOST, PORT = '127.0.0.1', 8888
    BUFFER = 1024

    def send():
        while True:
            msg = input('>>')
            soc.sendto(msg.encode("ascii"), (HOST,PORT))


    def receive():
        while True:
            data = soc.recvfrom(BUFFER)
            print(data)

    if __name__ == '__main__':

        # Create socket
        try:
            soc = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
            print("Client Socket Created")
        except socket.error as e:
            print("Failed to create socket. {}".format(e))
            sys.exit(1)

        pdu = input(">>")
        # This works
        thread_send = threading.Thread(target=send())
        thread_send.start()
        # but not this???
        thread_receive = threading.Thread(target=receive())
        thread_receive.start()

服务器代码： #Filename：server.py

import socket
import sys

# Version
VERSION = '1.0'

# Define global constants
HOST = 'localhost'
PORT = 8888
BUFFER = 1024
USERS = {'mkohn': 'abcd', 'wpolk': '1234'}

try:
    # Create UDP/DGRAM Socket
    soc = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    print("Server socket created")
except socket.error:
    # Socket creation failed
    print("Server Failed to create server socket.")
    sys.exit(10)

try:
    # Bind to a socket
    soc.bind((HOST, PORT))
except socket.error:
    # Bind failed
    print("Server Bind failed")
    sys.exit(11)

# Socket setup complete
print("socket bind complete")

def validate_user(uname, pw):
    if USERS.get(uname) == pw:
        return True
    else:
        return False

def parse_message(message):
    pass

def connect_users(requestor, requestee):
    pass

# Stores client logged into server
connected_clients = []
# Stores Chats
chats = []

while 1:
    # Get address and data from client
    data, addr = soc.recvfrom(BUFFER)

    if addr not in connected_clients:
        connected_clients.append(addr)

    msg = data.decode('ascii')

    print("Received from {}: Msg: {}".format( addr, msg ) )

    if not data:
        break

    reply = "OK...{}".format(msg)
    for client in connected_clients:
        if client != addr:
            print("Sending to: {}".format(client))
            print(reply)
            soc.sendto(reply.encode('ascii'), client)

soc.close()

client1输出（端口61417）：

>>y you no work
>>bueller
>>cheese
>>my name is mike

client2输出（端口56778）：

>>hi
>>what
>>where are you

服务器输出：

Received from ('127.0.0.1', 61417): Msg: y you no work
Sending to: ('127.0.0.1', 56778)
OK...y you no work
Received from ('127.0.0.1', 61417): Msg: bueller
Sending to: ('127.0.0.1', 56778)
OK...bueller
Received from ('127.0.0.1', 61417): Msg: cheese
Sending to: ('127.0.0.1', 56778)
OK...cheese
Received from ('127.0.0.1', 61417): Msg: my name is mike
Sending to: ('127.0.0.1', 56778)
OK...my name is mike
Received from ('127.0.0.1', 56778): Msg: hi
Sending to: ('127.0.0.1', 61417)
OK...hi
Received from ('127.0.0.1', 56778): Msg: what
Sending to: ('127.0.0.1', 61417)
OK...what
Received from ('127.0.0.1', 56778): Msg: where are you
Sending to: ('127.0.0.1', 61417)
OK...where are you

-------------------------- UPDATE -------------------- -------------

问题出在我的线程上。只需要传递参考。

正确的：

thread_send = threading.Thread(target=send)

不正确的：

thread_send = threading.Thread(target=send())

Python多线程客户端没有从服务器接收消息

0 个答案: