我是网络编程的新手,所以请原谅我,如果这是一个愚蠢的问题:) 我使用Python2.7在Ubuntu 10.04.2上创建了1个客户端和1个SocketServer.ThreadingMixIn服务器,但是 看起来我只能在客户端调用一次sock.send(),然后我会得到一个:
Traceback (most recent call last):
File "testClient1.py", line 33, in <module>
sock.send('c1:{0}'.format(n))
socket.error: [Errno 32] Broken pipe
这是我写的代码:
testClient1.py:
#! /usr/bin/python2.7
# -*- coding: UTF-8 -*-
import sys,socket,time,threading
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
try:
sock.connect(('localhost',20000))
except socket.error:
print('connection error')
sys.exit(0)
n=0
while n<=1000:
sock.send('c1:{0}'.format(n))
result=sock.recv(1024)
print(result)
n+=1
time.sleep(1)
testServer.py:
#! /usr/bin/python2.7
# -*- coding: UTF-8 -*-
import threading,SocketServer,time
class requestHandler(SocketServer.StreamRequestHandler):
#currentUserLogin={} #{clientArr:accountName}
def handle(self):
requestForUpdate=self.rfile.read(4)
print(requestForUpdate)
self.wfile.write('server reply:{0}'.format(requestForUpdate))
class broadcastServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
pass
if __name__ == '__main__':
server=broadcastServer(('localhost',20000),requestHandler)
t = threading.Thread(target=server.serve_forever)
t.daemon=True
t.start()
print('server start')
n=0
while n<=60:
print(n)
n+=1
time.sleep(1)
server.socket.close()
我在两个不同的终端中运行它们:
第一终端的输出:
$ python2.7 testServer.py
server start
0
1
2
3
4
c1:0
5
6
7
8
9
10
11
...
第二终端的输出:
$ python2.7 testClient1.py
server reply:c1:0
Traceback (most recent call last):
File "testClient1.py", line 33, in <module>
sock.send('c1:{0}'.format(n))
socket.error: [Errno 32] Broken pipe
我尝试在testClient.py中直接调用sock.send()两次, 例如:
while n<=1000:
sock.send('c1:{0}'.format(n))
sock.send('12333')
result=sock.recv(1024)
print(result)
n+=1
time.sleep(1)
但终端的输出仍然相同:( 任何人都可以指出我在这里做错了什么? 谢谢!
这是我提出的[Sol]。谢谢Mark:)
testClient1.py:
import sys,socket,time
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
try:
sock.connect(('localhost',20000))
except socket.error:
print('connection error')
sys.exit(0)
n=0
while n<=10: #connect once
sock.send('c1:{0}'.format(n))
result=sock.recv(1024)
print(result)
n+=1
time.sleep(1)
sock.close()
#once you close a socket, you'll need to initialize it again to another socket obj if you want to retransmit
sock=socket.socket(socket.AF_INET,socket.SOCK_STREAM)
try:
sock.connect(('localhost',20000))
except socket.error:
print('connection error')
sys.exit(0)
n=0
while n<=10: #connect once
sock.send('c3:{0}'.format(n))
result=sock.recv(1024)
print(result)
n+=1
time.sleep(1)
sock.close()
testServer.py:
import threading,SocketServer,time
class requestHandler(SocketServer.StreamRequestHandler):
#currentUserLogin={} #{clientArr:accountName}
def handle(self):
requestForUpdate=self.request.recv(1024)
print(self.client_address)
while requestForUpdate!='':
print(requestForUpdate)
self.wfile.write('server reply:{0}'.format(requestForUpdate))
requestForUpdate=self.request.recv(1024)
print('client disconnect')
class broadcastServer(SocketServer.ThreadingMixIn, SocketServer.TCPServer):
pass
if __name__ == '__main__':
server=broadcastServer(('localhost',20000),requestHandler)
t = threading.Thread(target=server.serve_forever)
t.daemon=True
t.start()
print('server start')
n=0
while n<=60:
print(n)
n+=1
time.sleep(1)
server.socket.close()
答案 0 :(得分:16)
每个连接在SocketServer.StreamRequestHandler
中调用一次handle()。如果从handle
返回,则连接已关闭。
如果您希望服务器处理多个send / recv,则必须循环直到recv()返回0,表示客户端关闭了连接(或者至少在发送时调用了shutdown())。
另请注意,TCP是一种流媒体协议。您需要设计一个消息协议来指示消息的长度或结束,并缓冲recv
,直到您有完整的消息。检查send
返回值以确保同时发送所有邮件,或使用sendall
。