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use GMT for the conditional timed gets (reported by Phil Karn)

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Daniel Stenberg 2001-04-17 07:28:49 +00:00
parent b86674174a
commit fd8ea204c0
1 changed files with 11 additions and 2 deletions
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13
lib/http.c
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@ -646,12 +646,21 @@ CURLcode Curl_http(struct connectdata *conn)
if(data->timecondition) {
struct tm *thistime;
/* Phil Karn (Fri, 13 Apr 2001) pointed out that the If-Modified-Since
* header family should have their times set in GMT as RFC2616 defines:
* "All HTTP date/time stamps MUST be represented in Greenwich Mean Time
* (GMT), without exception. For the purposes of HTTP, GMT is exactly
* equal to UTC (Coordinated Universal Time)." (see page 20 of RFC2616).
*/
#ifdef HAVE_LOCALTIME_R
/* thread-safe version */
/* We assume that the presense of localtime_r() proves the presense
of gmtime_r() which is a bit ugly but might work */
struct tm keeptime;
thistime = (struct tm *)localtime_r(&data->timevalue, &keeptime);
thistime = (struct tm *)gmtime_r(&data->timevalue, &keeptime);
#else
thistime = localtime(&data->timevalue);
thistime = gmtime(&data->timevalue);
#endif
if(NULL == thistime) {
failf(data, "localtime() failed!");