无法从客户端读取消息：UDP python 3

Question

我尝试通过手动输入从客户端向服务器发送消息，输入了10个限制。它可以在客户端成功运行，但是当我尝试运行服务器时却什么也没显示

这是客户端的代码

import socket

UDP_IP = "localhost"

UDP_PORT = 50026

print ("Destination IP:", UDP_IP)
print ("Destination port:", UDP_PORT)


s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)


for x in range (10):

    data = input("Message: ")
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    print(data)
else :
    print("lebih dari 10!!")

    s.sendto(data.encode('utf-8'), (UDP_IP, UDP_PORT))

s.close()

这是服务器端的结果和代码

import socket

UDP_IP = "localhost"

UDP_PORT = 50026

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

s.bind((UDP_IP, UDP_PORT))


while True:

    data, address = s.recvfrom(1024)

    print(data)
    print(address)


s.close()

当我运行程序时，什么都没有发生。这是正在运行的程序

Answer 1

您的主要问题是您添加到其中的else语句未执行。如果要在接受输入后将限制设置为10，则应在循环后打印该语句。

这是客户端代码：

import socket
UDP_IP = "127.0.0.1" # It is the same as localhost.
UDP_PORT = 50026

print ("Destination IP:", UDP_IP)
print ("Destination port:", UDP_PORT)

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
for x in range (10):
    data = input("Message: ")
    s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
    print(data)
    s.sendto(data.encode('utf-8'), (UDP_IP, UDP_PORT))
print("lebih dari 10!!")
s.close()

编辑：

我不是真的了解您的问题，但据我了解，您想显示服务器的限制。因此，您可以这样做，尝试在服务器上添加循环并仅从客户端地址接收输入，以避免接收到额外的消息。

服务器代码：

import socket

UDP_IP = "127.0.0.1" # It is the same as localhost.

UDP_PORT = 50026

s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)

s.bind((UDP_IP, UDP_PORT))

x = 0
while True:
    data, address = s.recvfrom(1024)
    # This block will make sure that the packets you are receiving are from expected address

    # The address[0] returns the ip of the packet's address, address is actually = ('the ip address', port)
    if address[0] != '127.0.0.1':
        continue
    # The logic block ends
    print(data)
    print(address)
    x = x + 1 # This shows that one more message is received.
    if x == 10:
        break # This breaks out of the loop and then the remaining statements will execute ending the program

print("10 messages are received and now the socket is closing.")
s.close()
print("Socket closed")

我已经注释了代码，希望您能理解代码