remove obsolete monkey patch for twisted 2.5

scrapy/xlib/patches.py

@@ -6,39 +6,8 @@ import twisted
 
 def apply_patches():
     if twisted.__version__ < '8.0.0':
-        patch_HTTPPageGetter_handleResponse()
         add_missing_blockingCallFromThread()
 
-
-# bugfix not present in twisted 2.5 for handling empty response of HEAD requests
-def patch_HTTPPageGetter_handleResponse():
-    from twisted.web.client import PartialDownloadError, HTTPPageGetter
-    from twisted.python import failure
-    from twisted.web import error
-
-    def _handleResponse(self, response):
-        if self.quietLoss:
-            return
-        if self.failed:
-            self.factory.noPage(
-                failure.Failure(
-                    error.Error(
-                        self.status, self.message, response)))
-        if self.factory.method.upper() == 'HEAD':
-            # Callback with empty string, since there is never a response
-            # body for HEAD requests.
-            self.factory.page('')
-        elif self.length != None and self.length != 0:
-            self.factory.noPage(failure.Failure(
-                PartialDownloadError(self.status, self.message, response)))
-        else:
-            self.factory.page(response)
-        # server might be stupid and not close connection. admittedly
-        # the fact we do only one request per connection is also
-        # stupid...
-        self.transport.loseConnection()
-    setattr(HTTPPageGetter, 'handleResponse', _handleResponse)
-
 # This function comes bundled with Twisted 8.x and above
 def add_missing_blockingCallFromThread():
     import Queue