[web] Fix HEAD request handling (closes #3677949)

Don't special-case HEAD in CubicWebRequestBase.is_client_cache_valid so we don't return garbage. HEAD is supposed to return the actual headers that a GET would return, which we can't do if we bypass all the normal cubicweb logic. In particular, we no longer always return 200, and return the right Content-Length/Content-Type/...

authorJulien Cristau <julien.cristau@logilab.fr>
changeset9f09c9c18cbb
branchdefault
phasedraft
hiddenyes
parent revision#e8b9a3d23ad9 [web/request] deprecate user_callback
child revision<not specified>
files modified by this revision
web/request.py
# HG changeset patch
# User Julien Cristau <julien.cristau@logilab.fr>
# Date 1395653698 -3600
# Mon Mar 24 10:34:58 2014 +0100
# Node ID 9f09c9c18cbb2127bbf167fee1e0b0ffdd8035f3
# Parent e8b9a3d23ad93e47391fe566012812245f2a751b
[web] Fix HEAD request handling (closes #3677949)

Don't special-case HEAD in CubicWebRequestBase.is_client_cache_valid so
we don't return garbage. HEAD is supposed to return the actual headers
that a GET would return, which we can't do if we bypass all the normal
cubicweb logic. In particular, we no longer always return 200, and
return the right Content-Length/Content-Type/...

diff --git a/web/request.py b/web/request.py
@@ -777,14 +777,10 @@
1          # Forge expected response
2          if modified:
3              if 'Expires' not in self.headers_out:
4                  # Expires header seems to be required by IE7 -- Are you sure ?
5                  self.add_header('Expires', 'Sat, 01 Jan 2000 00:00:00 GMT')
6 -            if self.http_method() == 'HEAD':
7 -                self.status_out = 200
8 -                # XXX replace by True once validate_cache bw compat method is dropped
9 -                return 200
10              # /!\ no raise, the function returns and we keep processing the request
11          else:
12              # overwrite headers_out to forge a brand new not-modified response
13              self.headers_out = self._forge_cached_headers()
14              if self.http_method() in ('HEAD', 'GET'):