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Fixed #1457 -- Added support for if-modified-since header in django.views.static. Thanks, Shannon -jj Behrens 

git-svn-id: http://code.djangoproject.com/svn/django/trunk@2476 bcc190cf-cafb-0310-a4f2-bffc1f526a37
This commit is contained in:
Adrian Holovaty 2006-03-03 04:53:04 +00:00
parent cffd184daf
commit 5beb39b896
2 changed files with 48 additions and 7 deletions
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AUTHORS
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@ -37,6 +37,7 @@ answer newbie questions, and generally made Django that much better:
Arthur <avandorp@gmail.com>
Jiri Barton
Ned Batchelder <http://www.nedbatchelder.com/>
Shannon -jj Behrens <http://jjinux.blogspot.com/>
James Bennett
Paul Bissex <http://e-scribe.com/>
Simon Blanchard

54
django/views/static.py
View File

@ -2,9 +2,13 @@ import os
import urllib
import posixpath
import mimetypes
import re
import rfc822
import stat
from django.core import template_loader
from django.core.exceptions import Http404, ImproperlyConfigured
from django.utils.httpwrappers import HttpResponse, HttpResponseRedirect
from django.utils.httpwrappers import HttpResponse, HttpResponseRedirect, \
HttpResponseNotModified
from django.core.template import Template, Context, TemplateDoesNotExist
def serve(request, path, document_root=None, show_indexes=False):
@ -41,13 +45,19 @@ def serve(request, path, document_root=None, show_indexes=False):
if os.path.isdir(fullpath):
if show_indexes:
return directory_index(newpath, fullpath)
else:
raise Http404, "Directory indexes are not allowed here."
elif not os.path.exists(fullpath):
raise Http404, "Directory indexes are not allowed here."
if not os.path.exists(fullpath):
raise Http404, '"%s" does not exist' % fullpath
else:
mimetype = mimetypes.guess_type(fullpath)[0]
return HttpResponse(open(fullpath, 'rb').read(), mimetype=mimetype)
# Respect the If-Modified-Since header.
statobj = os.stat(fullpath)
if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
statobj[stat.ST_MTIME], statobj[stat.ST_SIZE]):
return HttpResponseNotModified()
mimetype = mimetypes.guess_type(fullpath)[0]
contents = open(fullpath, 'rb').read()
response = HttpResponse(contents, mimetype=mimetype)
response["Last-Modified"] = rfc822.formatdate(statobj[stat.ST_MTIME])
return response
DEFAULT_DIRECTORY_INDEX_TEMPLATE = """
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
@ -85,3 +95,33 @@ def directory_index(path, fullpath):
'file_list' : files,
})
return HttpResponse(t.render(c))
def was_modified_since(header=None, mtime=0, size=0):
"""
Was something modified since the user last downloaded it?
header
This is the value of the If-Modified-Since header. If this is None,
I'll just return True.
mtime
This is the modification time of the item we're talking about.
size
This is the size of the item we're talking about.
"""
try:
if header is None:
raise ValueError
matches = re.match(r"^([^;]+)(; length=([0-9]+))?$", header,
re.IGNORECASE)
header_mtime = rfc822.mktime_tz(rfc822.parsedate_tz(
matches.group(1)))
header_len = matches.group(3)
if header_len and int(header_len) != size:
raise ValueError
if mtime > header_mtime:
raise ValueError
except (AttributeError, ValueError):
return True
return False