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authorDan McGee <dan@archlinux.org>2013-04-17 04:59:32 +0200
committerDan McGee <dan@archlinux.org>2013-04-17 04:59:32 +0200
commit31d39e75eea7fb6cdf3bb8bfd8b490d45de04ee9 (patch)
treebfb0e14f9fc4479894fd9d787699a84d0fafaf54 /main
parent0589853360d12a1746e2d8e92e798f2727a0b5df (diff)
downloadarchweb-31d39e75eea7fb6cdf3bb8bfd8b490d45de04ee9.tar.gz
archweb-31d39e75eea7fb6cdf3bb8bfd8b490d45de04ee9.tar.xz
Add shortcut for HEAD requests on slower views
We sometimes see some web bots and crawlers make HEAD requests to verify existence of certain pages in the application. However, they are less than kind as 20-50 requests might arrive at the same time, and package search and details pages are some of the slowest rendering pages we have due to the Django template engine. Rather than waste time generating the content only to throw it away, response as soon as we can with either a 404 or 200 response as appropriate, omitting the 'Content-Length' header completely, which seems to be acceptable by the HTTP spec. Signed-off-by: Dan McGee <dan@archlinux.org>
Diffstat (limited to 'main')
-rw-r--r--main/utils.py9
1 files changed, 9 insertions, 0 deletions
diff --git a/main/utils.py b/main/utils.py
index cdd4ff7..8394e5c 100644
--- a/main/utils.py
+++ b/main/utils.py
@@ -8,6 +8,7 @@ import hashlib
from django.core.cache import cache
from django.db import connections, router
+from django.http import HttpResponse
from django.utils.timezone import now
from django.template.defaultfilters import slugify
@@ -55,6 +56,14 @@ def clear_cache_function(func, args, kwargs):
cache.delete(key)
+def empty_response():
+ empty = HttpResponse('')
+ # designating response as 'streaming' forces ConditionalGetMiddleware to
+ # not add a 'Content-Length: 0' header
+ empty.streaming = True
+ return empty
+
+
def format_http_headers(request):
headers = sorted((k, v) for k, v in request.META.items()
if k.startswith('HTTP_'))