id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
25725	UpdateCacheMiddleware can't cache a generator response	Matthew Somerville	Johannes Maron	"As generator functions have a close method, an HTTPResponse using a generator for its content dies when trying to be cached even though the generator has been consumed and read by the content setter (because the generator has been added to _closable_objects and that can't be cached). Should the content setter of an HTTPResponse spot this and close/not add to _closable_objects,or should it be documented that you can't use a generator function with an HTTPResponse and have it be cached (even though it's been read)?


{{{
from django.conf import settings
settings.configure(ALLOWED_HOSTS = ['*'])
from django.middleware import cache
from django import http

req = http.HttpRequest()
req.method = 'GET'
req.META = {'SERVER_NAME': 'localhost', 'SERVER_PORT':80}

resp = http.HttpResponse(x for x in range(1, 10))
cache.FetchFromCacheMiddleware().process_request(req)
cache.UpdateCacheMiddleware().process_response(req, resp)
}}}
gives
{{{
Can't pickle <type 'generator'>: attribute lookup __builtin__.generator failed
}}}
"	Bug	closed	Core (Cache system)	1.8	Normal	fixed		info@…	Accepted	1	0	0	0	0	0