Fixed Issue1424152 in Py3k: urllib2 fails with HTTPS over Proxy.

Lib/urllib/request.py

@@ -163,6 +163,7 @@ class Request:
         self.full_url = unwrap(url)
         self.data = data
         self.headers = {}
+        self._tunnel_host = None
         for key, value in headers.items():
             self.add_header(key, value)
         self.unredirected_hdrs = {}
@@ -218,8 +219,12 @@ class Request:
     # End deprecated methods
 
     def set_proxy(self, host, type):
-        self.host, self.type = host, type
-        self.selector = self.full_url
+        if self.type == 'https' and not self._tunnel_host:
+            self._tunnel_host = self.host
+        else:
+            self.type= type
+            self.selector = self.full_url
+        self.host = host
 
     def has_proxy(self):
         return self.selector == self.full_url
@@ -659,7 +664,7 @@ class ProxyHandler(BaseHandler):
             req.add_header('Proxy-authorization', 'Basic ' + creds)
         hostport = unquote(hostport)
         req.set_proxy(hostport, proxy_type)
-        if orig_type == proxy_type:
+        if orig_type == proxy_type or orig_type == 'https':
             # let other handlers take care of it
             return None
         else:
@@ -1041,6 +1046,10 @@ class AbstractHTTPHandler(BaseHandler):
         # request.
         headers["Connection"] = "close"
         headers = dict((name.title(), val) for name, val in headers.items())
+
+        if req._tunnel_host:
+            h.set_tunnel(req._tunnel_host)
+
         try:
             h.request(req.get_method(), req.selector, req.data, headers)
             r = h.getresponse()  # an HTTPResponse instance