用套接字发送UTF-8 [英] Sending UTF-8 with sockets

问题描述

我正在python中设置一个聊天程序。一切都正常，直到我
发送一个包含导致程序崩溃的非ascii字符的字符串。该字符串从wx.TestCtrl

中读取

• 如何通过套接字发送UTF-8编码字符串？




• 为什么程序开始时没有问题？我已经将编码设置为UTF-8
  ，所以不会导致程序崩溃？

这是错误：

 追溯（最近的最后一次呼叫）：
文件./client.py ，line 180，in sendMess 
 outSock.sendto（s，self.serveraddr）
 UnicodeEncodeError：'ascii'编解码器不能在位置26中编码字符u'\xf6'：
序号不在范围（128）
  

这是我如何创建套接字并尝试发送消息：

  outSock = socket.socket（socket.AF_INET，socket.SOCK_DGRAM）
 .... 
 outSock.sendto（s，self.serveraddr）
  

解决方案

套接字上的Python 2， socket.sendto 需要一个plain字符串，而不是 unicode 对象。因此，您必须编码它，比如使用UTF-8：

  outSock.sendto（s.encode（'utf-8'） ，self.serveraddr）
  

同样，当您 recvfrom （或类似）在另一端，你需要转换回一个Unicode对象：

  unicode_string = s .decode（'utf-8'）
  

（在Python 3中， code> bytes ，这使得需要在它和 unicode 之间进行转换更明确。）

I'm tring to setup a little chat program in python. Everything was working fine until I sent a string containing a non ascii character that caused the program to crash. The string are read from a wx.TestCtrl

• How can I send a string with UTF-8 encoding over sockets?

• Why does the program work without problems at the start? I have set the encoding to UTF-8 so wouldn't all character cause the program to crash?

Here is the error:

Traceback (most recent call last):
  File "./client.py", line 180, in sendMess
    outSock.sendto(s,self.serveraddr)
UnicodeEncodeError: 'ascii' codec can't encode character u'\xf6' in position 26: 
                    ordinal not in range(128)

Here is how I create the socket and try to send the message:

  outSock = socket.socket(socket.AF_INET,socket.SOCK_DGRAM)
  ....
  outSock.sendto(s,self.serveraddr)

解决方案

In Python 2, socket.sendto on a socket takes a "plain" string, not a unicode object. Therefore you must encode it, say using UTF-8:

outSock.sendto(s.encode('utf-8'), self.serveraddr)

Similarly, when you recvfrom (or similar) at the other end, you'll need to convert back to a Unicode object:

unicode_string = s.decode('utf-8')

(In Python 3, you'll be working with bytes, which makes the need to convert between it and unicode more explicit.)

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