Slightly better handling of http headers from http (CONNECT) proxy. Buffers up to 128KiB of headers and raises exception if this size is exceeded.

This could be optimized further, but for the time being it does the trick.
(cherry picked from commit 8bb01d4c29)
This commit is contained in:
Foxlik 2016-10-18 16:39:15 +02:00 committed by Toshio Kuratomi
parent deb1e3ebc7
commit 6b603b026c

View file

@ -674,7 +674,12 @@ class SSLValidationHandler(urllib_request.BaseHandler):
credentials = "%s:%s" % (proxy_parts.get('username',''), proxy_parts.get('password',''))
s.sendall('Proxy-Authorization: Basic %s\r\n' % credentials.encode('base64').strip())
s.sendall('\r\n')
connect_result = s.recv(4096)
connect_result = ""
while connect_result.find("\r\n\r\n") <= 0:
connect_result += s.recv(4096)
# 128 kilobytes of headers should be enough for everyone.
if len(connect_result) > 131072:
raise ProxyError('Proxy sent too verbose headers. Only 128KiB allowed.')
self.validate_proxy_response(connect_result)
if context:
ssl_s = context.wrap_socket(s, server_hostname=self.hostname)