当我在 cygwin 中将以下函数与 Python 3.2.3 包一起使用时，它会挂起对任何 https 主机的任何请求。它将抛出以下错误：60 秒后，[Errno 104] 连接被对等方重置。
更新：我认为这仅限于 cygwin，但这也发生在带有 Python 3.3 的 Windows 7 64 位中。我现在就尝试3.2。使用windows命令shell时出现的错误是：
urlopen 错误 [WinError 10054] 现有连接被远程主机强制关闭
UPDATE2（Electric-Bugaloo）：这仅限于我尝试使用的几个网站。我对谷歌和其他主要网站进行了测试，没有任何问题。看来它与这个错误有关：
http://bugs.python.org/issue16361 http://bugs.python.org/issue16361
具体来说，服务器在 client-hello 之后挂起。这是由于 python3.2 和 3.3 编译版本附带的 openssl 版本所致。它错误地识别了服务器的 ssl 版本。现在，我需要代码在打开与受影响站点的连接时自动将我的 ssl 版本降级到 sslv3，如本文中所示：
如何使用urllib2获取使用SSLv3加密的网页 https://stackoverflow.com/questions/8039859/how-to-use-urllib2-to-get-a-webpage-using-sslv3-encryption
但我无法让它发挥作用。
def worker(url, body=None, bt=None):
'''This function does all the requests to wherever for data
takes in a url, optional body utf-8 encoded please, and optional body type'''
hdrs = {'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language': 'en-us,en;q=0.5',
'Accept-Encoding': 'gzip,deflate',
'User-Agent': "My kewl Python tewl!"}
if 'myweirdurl' in url:
hdrs = {'Accept': 'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
'Accept-Language': 'en-us,en;q=0.5',
'Accept-Encoding': 'gzip,deflate',
'User-Agent': "Netscape 6.0"}
if bt:
hdrs['Content-Type'] = bt
urlopen = urllib.request.urlopen
Request = urllib.request.Request
start_req = time.time()
logger.debug('request start: {}'.format(datetime.now().ctime()))
if 'password' not in url:
logger.debug('request url: {}'.format(url))
req = Request(url, data=body, headers=hdrs)
try:
if body:
logger.debug("body: {}".format(body))
handle = urlopen(req, data=body, timeout=298)
else:
handle = urlopen(req, timeout=298)
except socket.error as se:
logger.error(se)
logger.error(se.errno)
logger.error(type(se))
if hasattr(se, 'errno') == 60:
logger.error("returning: Request Timed Out")
return 'Request Timed Out'
except URLError as ue:
end_time = time.time()
logger.error(ue)
logger.error(hasattr(ue, 'code'))
logger.error(hasattr(ue, 'errno'))
logger.error(hasattr(ue, 'reason'))
if hasattr(ue, 'code'):
logger.warn('The server couldn\'t fulfill the request.')
logger.error('Error code: {}'.format(ue.code))
if ue.code == 404:
return "Resource Not Found (404)"
elif hasattr(ue, 'reason') :
logger.warn('We failed to reach a server with {}'.format(url))
logger.error('Reason: {}'.format(ue.reason))
logger.error(type(ue.reason))
logger.error(ue.reason.errno)
if ue.reason == 'Operation timed out':
logger.error("Arrggghh, timed out!")
else:
logger.error("Why U no match my reason?")
if ue.reason.errno == 60:
return "Operation timed out"
elif hasattr(ue, 'errno'):
logger.warn(ue.reason)
logger.error('Error code: {}'.format(ue.errno))
if ue.errno == 60:
return "Operation timed out"
logger.error("req time: {}".format(end_time - start_req))
logger.error("returning: Server Error")
return "Server Error"
else:
resp_headers = dict(handle.info())
logger.debug('Here are the headers of the page : {}'.format(resp_headers))
logger.debug("The true URL in case of redirects {}".format(handle.geturl()))
try:
ce = resp_headers['Content-Encoding']
except KeyError as ke:
ce = None
else:
logger.debug('Content-Encoding: {}'.format(ce))
try:
ct = resp_headers['Content-Type']
except KeyError as ke:
ct = None
else:
logger.debug('Content-Type: {}'.format(ct))
if ce == "gzip":
logger.debug("Unzipping payload")
bi = BytesIO(handle.read())
gf = GzipFile(fileobj=bi, mode="rb")
if "charset=utf-8" in ct.lower() or ct == 'text/html' or ct == 'text/plain':
payload = gf.read().decode("utf-8")
else:
logger.debug("Unknown content type: {}".format(ct))
sys.exit()
return payload
else:
if ct is not None and "charset=utf-8" in ct.lower() or ct == 'text/html' or ct == 'text/plain':
return handle.read().decode("utf-8")
else:
logger.debug("Unknown content type: {}".format(ct))
sys.exit()
