在过去的半天里，我一直在为以下问题苦苦挣扎，虽然我找到了一些关于类似问题的信息，但没有什么能真正达到目的。
我正在尝试使用包含一些 Unicode 字符的数据的 urllib2 发送 PUT 请求：
body = u'{ "bbb" : "asdf\xd7\xa9\xd7\x93\xd7\x92"}'
conn = urllib2.Request(request_url, body, headers)
conn.get_method = lambda: 'PUT'
response = urllib2.urlopen(conn)
我尝试使用body = body.encode('utf-8')和其他变体，但无论我做什么，我都会收到以下错误：
UnicodeEncodeError at ...
'ascii' codec can't decode byte 0xc3 in position 15: ordinal not in range(128)
使用以下调用堆栈之一：
File "..." in ...
195. response = urllib2.urlopen(conn)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in urlopen
126. return _opener.open(url, data, timeout)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in open
394. response = self._open(req, data)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in _open
412. '_open', req)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in _call_chain
372. result = func(*args)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in http_open
1199. return self.do_open(httplib.HTTPConnection, req)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in do_open
1168. h.request(req.get_method(), req.get_selector(), req.data, headers)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in request
955. self._send_request(method, url, body, headers)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in _send_request
989. self.endheaders(body)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in endheaders
951. self._send_output(message_body)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in _send_output
815. self.send(message_body)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in send
787. self.sock.sendall(data)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/socket.py" in meth
224. return getattr(self._sock,name)(*args)
或以下调用堆栈（当我这样做时body = body.encode('utf-8')）：
File "..." in ...
195. response = urllib2.urlopen(conn)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in urlopen
126. return _opener.open(url, data, timeout)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in open
394. response = self._open(req, data)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in _open
412. '_open', req)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in _call_chain
372. result = func(*args)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in http_open
1199. return self.do_open(httplib.HTTPConnection, req)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/urllib2.py" in do_open
1168. h.request(req.get_method(), req.get_selector(), req.data, headers)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in request
955. self._send_request(method, url, body, headers)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in _send_request
989. self.endheaders(body)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in endheaders
951. self._send_output(message_body)
File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/httplib.py" in _send_output
809. msg += message_body
我究竟做错了什么？如何通过 urllib2 发送带有 Unicode 字符的正文？如果没有 Unicode 字符，一切正常。
另请注意，我的Content-Type标题设置为application/json;charset=utf-8.
如果它以任何方式相关，我正在做的事情是这样的：我收到一个对我的 Django 服务器的请求，我将请求委托给另一个 Django 服务器。我不重定向，只是从我自己的服务器发送请求，获取响应并将其发回。在 Django 视图中也是body如此。request.body
编辑：
我的标题是：
{
'Origin': 'http://10.0.0.146:8000',
'Accept-Language': 'en-US,en;q=0.8',
'Accept-Encoding': 'gzip,deflate,sdch',
'Host': 'localhost:5000',
'Accept': 'application/json, text/plain, */*',
'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_8_3) AppleWebKit/537.31 (KHTML, like Gecko) Chrome/26.0.1410.65 Safari/537.31',
'Accept-Charset': 'ISO-8859-1,utf-8;q=0.7,*;q=0.3',
'Connection': 'keep-alive',
'X-Requested-With': 'XMLHttpRequest',
'Pragma': 'no-cache',
'Cache-Control': 'no-cache',
'Referer': 'http://localhost:5000/',
'Content-Type': 'application/json;charset=UTF-8',
'Authorization': 'ApiKey ogkLPgSESNyTOgIdbSLDhJjvyVJcbg:0d5897b5204c2f2527f532c6a97ba18a7f06acdc',
'Cookie': 'username=ogkLPgSESNyTOgIdbSLDhJjvyVJcbg; _we_wk_ls_=%7B%22time%22%3A1369123506709%7D; __jwpusr=39e63770-ec5c-4b96-9f7f-b199703d0d36; sessionid=0d741a7560258b301979a1c853b42a81; api_key=0d5897b5204c2f2527f532c6a97ba18a7f06acdc'
}