I just re-read the bug post - the fix is for file datestamps going
weird over a DST adjustment period, not just for clock lookups. At
least it's a place to start.

Ralph

On 7/6/05, Ralph Mitchell <ralphmitchell_at_gmail.com> wrote:
> There's an explanation, and a fix, here:
>
> http://www.codeproject.com/datetime/dstbugs.asp?df=100&forumid=2218&exp=0&select=229121
>
> To put it simply, that's not a bug, that's the OS working as designed,
> and to get the correct date/time info, use GetUTCFileModTime...
>
> Ralph Mitchell
>
>
> On 7/4/05, Daniel Stenberg <daniel-curl_at_haxx.se> wrote:
> > Hi friends
> >
> > We got this bug report on curl_getdate() on Windows, and I need some help with
> > testing and fixing/working around this problem.
> >
> > There are some further details and comments in the actual bug tracker entry...
> >
> > --
> > Commercial curl and libcurl Technical Support: http://haxx.se/curl.html
> >
> > ---------- Forwarded message ----------
> > Bugs item #1230118, was opened at 2005-06-30 05:27
> > https://sourceforge.net/tracker/?func=detail&atid=100976&aid=1230118&group_id=976
> >
> > Summary: curl_getdate(), DST, and cookie expiration
> >
> > Initial Comment:
> > Platform: Windows XP
> > libcurl: 7.14
> >
> > With the system clock properly configured to
> > automatically adjust for Daylight Saving Time,
> > curl_getdate() appears to return a time_t value which
> > is 1 hour ahead of the correct value. This prevents
> > cookies from expiring at the proper time.
> >
> > The following demonstrates the problem:
> >
> > #include <stdio.h>
> > #include "curl/curl.h"
> >
> > int main()
> > {
> > time_t tNow = ::time(NULL);
> > tm tmGMT;
> > char szGMT[128];
> >
> > ::memcpy(&tmGMT, ::gmtime(&tNow), sizeof(tm));
> > ::strftime( szGMT, 128, "%a, %d-%b-%Y %H:%M:%S GMT",
> > &tmGMT );
> >
> > time_t tCURL = ::curl_getdate(szGMT, NULL);
> > time_t tDiff = tCURL - tNow;
> >
> > printf("Current time: %s\n", szGMT);
> > printf("Sytem time_t: %i\n", tNow);
> > printf("libcurl time_t: %i\n", tCURL);
> > printf("Difference: %i seconds\n", tCURL - tNow);
> >
> > return 0;
> > }
> >
> > -----------------------------------------------------------
> > Example run with properly configured system clock
> > (during DST):
> >
> > Current time: Thu, 30-Jun-2005 03:02:14 GMT
> > Sytem time_t: 1120100534
> > libcurl time_t: 1120104134
> > Difference: 3600 seconds
> >
> > -----------------------------------------------------------
> > Example run with automatic DST adjustment disabled:
> >
> > Current time: Thu, 30-Jun-2005 03:02:28 GMT
> > Sytem time_t: 1120100548
> > libcurl time_t: 1120100548
> > Difference: 0 seconds
> >
>
Received on 2005-07-06