Question

在socket中，我发现如果服务器在调用recv（）之前没有发送任何消息，服务器将没有响应，无论是否使用mutilthread。如下图所示：

server.py（使用SocketServer模块）：

def handle(self):
    conn = self.request
#    conn.send('Welcome to server')
    flag = True
    while flag: 
        data = conn.recv(1024)
        print 'client:' + data
        if data == 'exit':
            flag = False
        conn.send('AAAAAA')
    conn.close()

client.py：

client = socket.socket()
ip_port = ('127.0.0.1', 11111)
client.connect(ip_port)

while True:
    data = client.recv(1024)
    print 'server:' + data
    send = raw_input('client:')
    client.send(send)
    if send == 'exit':
        sys.exit()

如果你能帮助我，我将非常感激。

Answer 1

# server.py
import socket

TCP_IP = '127.0.0.1'
TCP_PORT = 5005
BUFFER_SIZE = 1024

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.bind((TCP_IP, TCP_PORT))
s.listen(1)

conn, addr = s.accept()
print 'Connection address:', addr
while 1:
    data = conn.recv(BUFFER_SIZE)
    if not data: break
    print "Server received data:", data
    conn.send("Data received at server side") 
conn.close()

# client.py
import socket

TCP_IP = '127.0.0.1'
TCP_PORT = 5005
BUFFER_SIZE = 1024
MESSAGE = "Hello World!"

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
s.connect((TCP_IP, TCP_PORT))
s.send(MESSAGE)
print "Client: " + MESSAGE
data = s.recv(BUFFER_SIZE)
s.close()

print data

我认为提供示例代码可以说明问题。

# Expected input:
python server.py
python client.py

# Expected output:
# (server output)
Connection address: ('127.0.0.1', 62136)
Server received data: Hello World!
# (client output)
Client: Hello World!
Data received at server side

您可以通过比较代码（例如bind（））找出丢失的组件。希望它有所帮助。参考本网站：https://wiki.python.org/moin/TcpCommunication

python socket：服务器必须在recv之前发送消息

1 个答案: