一个socket通信的例子，找不出失败的原因

xiaomayi0323

server code

#!/usr/bin/env python #coding=utf-8 from socket import * HOST = '' PORT = 21567 BUFSIZ = 1024 ADDR = (HOST,PORT) tcpSerSock = socket(AF_INET,SOCK_STREAM) tcpSerSock.bind(ADDR) tcpSerSock.listen(5) while True:     print "waiting for connection..."     tcpCliSock,addr = tcpSerSock.accept()     print '...connection from',addr          while True :         data = tcpCliSock.recv(BUFSIZ)         if not data:             break         tcpSerSock.send('welcome',data)         tcpCliSock.close()          tcpSerSock.close()

client code:

#!/usr/bin/env python #coding=utf-8 from socket import * HOST = 'localhost' PORT = 21567 BUFSIZ = 1024 ADDR = (HOST,PORT) tcpCliSock = socket(AF_INET,SOCK_STREAM) tcpCliSock.connect(ADDR) while True:     data = raw_input('> ')     if not data:         break     tcpCliSock.send(data)     tcpCliSock.recv(BUFSIZ)     if not data:         break     print data          tcpCliSock.close()

server 错误提示信息：
> "C:\Python25\pythonw.exe" -u "C:\Users\asus\Desktop\ser.py"
waiting for connection...
...connection from ('127.0.0.1', 55090)
Traceback (most recent call last):
  File "C:\Users\asus\Desktop\ser.py", line 27, in <module>
    tcpSerSock.send('welcome',data)
TypeError: an integer is required

大家看看，那里出问题了

smallfish_xy

send(...)
    send(data[, flags]) -> count

    Send a data string to the socket.  For the optional flags
    argument, see the Unix manual.  Return the number of bytes
    sent; this may be less than len(data) if the network is busy.

你这个函数用错了

smallfish_xy

第二个参数是int，flags

xiaomayi0323

谢谢，我修改一下代码后，可以返回正确结果，但是服务端只执行一次，就异常退出了。
#!/usr/bin/env python
#coding=utf-8
#author=xiaomayi0323

from socket import *

HOST = ''
PORT = 21567
BUFSIZ = 1024
ADDR = (HOST,PORT)

tcpSerSock = socket(AF_INET,SOCK_STREAM)
tcpSerSock.bind(ADDR)
tcpSerSock.listen(5)

while True:
    print "waiting for connection..."
    tcpCliSock,addr = tcpSerSock.accept()
    print '...connection from',addr
   
    while True :
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        tcpCliSock.send('welcome %s' % data)
        tcpCliSock.close()
        
tcpSerSock.close()

server 错误提示信息：
> "C:\Python25\pythonw.exe" -u "C:\Users\asus\Desktop\ser.py"
waiting for connection...
...connection from ('127.0.0.1', 56889)
Traceback (most recent call last):
  File "C:\Users\asus\Desktop\ser.py", line 24, in <module>
    data = tcpCliSock.recv(BUFSIZ)
  File "C:\Python25\lib\socket.py", line 141, in _dummy
    raise error(EBADF, 'Bad file descriptor')
socket.error: (9, 'Bad file descriptor')

smallfish_xy

while True:
    print "waiting for connection..."
    tcpCliSock,addr = tcpSerSock.accept()
    print '...connection from',addr
   
    while True :
        data = tcpCliSock.recv(BUFSIZ)
        if not data:
            break
        tcpCliSock.send('welcome %s' % data)
        tcpCliSock.close() ## 删除这个
        
tcpSerSock.close()

xiaomayi0323

非常感谢，成功了。

thinke365

谢谢，我修改一下代码后，可以返回正确结果，但是服务端只执行一次，就异常退出了。
#!/usr/bin/env pytho ...
xiaomayi0323 发表于 2009-11-02 14:37

这段代码是核心编程上抄的吧？
呵呵
把tcpCliSock.close()向前移动4个空格应该就可以了。
还要继续通信的，怎么能把Socket给关闭了呢

ning_lianjie

顶楼上，中文版的缩进简直没法看，英文版的缩进也不能全部照抄。。。