[英]Python 3: Socket server send to multiple clients with sendto() function
我有一台设置有套接字和线程的服务器,当我将多个客户端连接到该服务器时,如果一个客户端发送一条消息,则服务器会向该服务器重复发送同一条消息,而不是发送给所有其他已连接的客户端。 例如:
#server terminal
Server is connected on 8000
('127.0.0.1', 50328) is Connected
('127.0.0.1', 50329) is Connected
Received Message b'hi\n'
#Client 1 terminal
#input
[user1]hi
#returns:
[user1] b'hi\nhi\n'[user1]
#Client 2 terminal
#doesn't return anything, just sits at the prompt
[user2]
服务器的相关代码为:
def clientHandler():
c, addr = s.accept()
print(addr, "is Connected")
if addr not in clients:
clients.append(addr)
try:
while True:
data = c.recv(1024)
if not data:
break
print("Received Message ", repr(data))
for client in clients:
c.sendto(data, client)
except:
print("Error. Data not sent.")
我已阅读以下资料,但无济于事:
https://docs.python.org/3/library/socket.html
我该怎么做才能使其通过服务器将user1的消息发送给所有其他用户?
编辑1:所有server.py代码:
from socket import *
from threading import Thread
clients = []
def clientHandler():
c, addr = s.accept()
print(addr, "is Connected")
if addr not in clients:
clients.append(addr)
try:
while True:
data = c.recv(1024)
if not data:
break
for client in clients:
c.sendto(data, client)
except:
print("Error. Data not sent to all clients.")
HOST = '' #localhost
PORT = 8000
s = socket(AF_INET, SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(5)
print("Server is running on "+ str(PORT))
#Thread(target=clientHandler).start()
#Thread(target=clientHandler).start()
#Thread(target=clientHandler).start()
for i in range(5):
Thread(target=clientHandler).start()
s.close()
我在您的代码中看到了一些问题-
您正在启动clientHandler线程,但随后没有使主线程加入任何线程,这可能导致主线程在子线程完成处理之前死亡,我想您想将创建的Thread
对象保存到变量中,然后他们加入主线程。
而不是直接建立clientHandlers,您应该首先等待从客户端(在处理程序功能之外)接受连接,一旦获得连接,将其添加到客户端列表中并将其发送到clientHandler。
在你的代码- for client in clients: c.sendto(data, client)
m该将数据发送到所有客户端,而不是你应该检查一下client
是不是client
,这个线程是服务,通过对检查addr
,这个线程是服务。
示例更改-
from socket import *
from threading import Thread
clients = []
def clientHandler(c, addr):
global clients
print(addr, "is Connected")
try:
while True:
data = c.recv(1024)
if not data:
break
for client in clients:
if addr != client:
c.sendto(data, client)
except:
print("Error. Data not sent to all clients.")
HOST = '' #localhost
PORT = 8000
s = socket(AF_INET, SOCK_STREAM)
s.bind((HOST, PORT))
s.listen(5)
print("Server is running on "+ str(PORT))
#Thread(target=clientHandler).start()
#Thread(target=clientHandler).start()
#Thread(target=clientHandler).start()
trds = []
for i in range(5):
c, addr = s.accept()
clients.append(addr)
t = Thread(target=clientHandler, args = (c, addr))
trds.append(t)
t.start()
for t in trds:
t.join()
s.close()
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