bytes_received signal: send spider argument

docs/topics/signals.rst

@@ -162,7 +162,7 @@ bytes_received
 --------------
 
 .. signal:: bytes_received
-.. function:: bytes_received(data, request)
+.. function:: bytes_received(data, request, spider)
 
     Sent by the HTTP 1.1 download handler when a group of bytes is
     received for a specific request.
@@ -175,6 +175,9 @@ bytes_received
     :param request: the request that generated the response
     :type request: :class:`~scrapy.http.Request` object
 
+    :param spider: the spider associated with the response
+    :type spider: :class:`~scrapy.spiders.Spider` object
+
 spider_closed
 -------------
 

scrapy/core/downloader/handlers/http11.py

@@ -482,6 +482,7 @@ class _ResponseReader(protocol.Protocol):
             signal=signals.bytes_received,
             data=bodyBytes,
             request=self._request,
+            spider=self._crawler.spider,
         )
 
         if self._maxsize and self._bytes_received > self._maxsize:

tests/test_engine.py

@@ -159,7 +159,7 @@ class CrawlerRun(object):
     def item_scraped(self, item, spider, response):
         self.itemresp.append((item, response))
 
-    def bytes_received(self, data, request):
+    def bytes_received(self, data, request, spider):
         self.bytes[request] += data
 
     def request_scheduled(self, request, spider):