[Bug 1805] New: InternetCrackUrl incorrectly sets dwUrlPathLength

[Wine Bugs]

http://bugs.winehq.com/show_bug.cgi?id=1805

Summary: InternetCrackUrl incorrectly sets dwUrlPathLength
           Product: Wine
           Version: unspecified
          Platform: Other
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: wine-binary
        AssignedTo: [e-mail]
        ReportedBy: [e-mail]

Hi,

During some application testing, we discovered that WinE does not correctly
mimic the WinINet function InternetCrackUrl. The real WinAPI sets the
dwUrlPathLength member of the URL_COMPONENTS structure to additionally hold
the extra info of the given URL if the extra info is not requested as a
separate component. Although this behaviour is not well documented by the
Win SDK, it is for instance implemented on WinXP, Win2000 and WinME and
therefore might be considered to be intended by Microsoft.

The following lines of code demonstrate the problem:

LPCTSTR lpszURL = _T("http://www.myserver.com/myscript.php?arg=1");
   URL_COMPONENTS url;

// call 1: crack out url path and extra info
   ::ZeroMemory(&url, sizeof(url));
   url.dwStructSize = sizeof(url);
   url.dwHostNameLength = 1;
   url.dwUrlPathLength  = 1;
   url.dwExtraInfoLength = 1;
   ::InternetCrackUrl(lpszURL, 0, 0, &url);
   // dwUrlPathLength is 13, holding "/myscript.php"

// call 2: only crack out url path
   ::ZeroMemory(&url, sizeof(url));
   url.dwStructSize = sizeof(url);
   url.dwHostNameLength = 1;
   url.dwUrlPathLength  = 1;
   ::InternetCrackUrl(lpszURL, 0, 0, &url);
   // now, dwUrlPathLength should be 19, holding "/myscript.php?arg=1",
   // while WinE still sets it to 13

OK, it is of course no great deal to write code that correctly runs on real
Win systems and on WinE (2-3 lines did it). But programers who rely on this
behaviour will for example wonder why their applications don't transmit any
HTTP GET parameters when they call HttpOpenRequest with lpszObjectName set
to the URL path component returned by InternetCrackUrl...