[Bug 32438] New: winhttp:winhttp conformance test WinHttpGetProxyForUrl() failure
wine-bugs at winehq.org
wine-bugs at winehq.org
Thu Dec 13 10:31:17 CST 2012
http://bugs.winehq.org/show_bug.cgi?id=32438
Bug #: 32438
Summary: winhttp:winhttp conformance test
WinHttpGetProxyForUrl() failure
Product: Wine
Version: 1.5.19
Platform: x86
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: winhttp
AssignedTo: wine-bugs at winehq.org
ReportedBy: fgouget at codeweavers.com
Classification: Unclassified
My laptop gets the following test failure (see the fg-acer64-* winetest
results):
winhttp.c:2700: Test failed: got 12166
I looked into this and what's special about it is that its fqdn is
'hawai.free.fr'. I'm not 100% sure how this happens but I think it makes sense
given that my ISP is free.fr so this is just the combination of the hostname
'hawai' and the default domain 'free.fr' (my other machines are on various
private domains).
This causes WinHttpDetectAutoProxyConfigUrl() to check if wpad.free.fr is
resolvable, which it is. So it succeeds and returns:
http://212.27.63.171/wpad.dat
The problem is that wpad.free.fr is hosted on a virtual web host(1). That is a
single web server with a single IP address hosts multiple web sites and uses
the Host field in the HTTP header to determine which site is being accessed. So
accessing this page by IP address fails while accessing it as
http://wpad.free.fr/wpad.dat succeeds.
This error then causes WinHttpGetProxyForUrl() to fail because the string it is
given to parse is an HTML HTTP 500 error page. I have confirmed that if
WinHttpGetProxyForUrl() return http://wpad.free.fr/wpad.dat the test succeeds.
So why does WinHttpGetProxyForUrl() use the IP address to build the URL?
On Windows I could not get WinHttpDetectAutoProxyConfigUrl() to return anything
but ERROR_WINHTTP_AUTODETECTION_FAILED. I suspect it gets a different domain
name somehow.
(1) https://en.wikipedia.org/wiki/Virtual_hosting#Name-based
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