x SuSE Linux 13.1-RELEASE x
x SuSE Linux 13.1-RELEASEx
a.TH curl_getdate 3 "12 Aug 2005" "libcurl" "libcurl" curl_get-
date - Convert a date string to number of seconds
#include <curl/curl.h>
time_t curl_getdate(char *datestring, time_t *now);
curl_getdate(3) returns the number of seconds since the Epoch,
January 1st 1970 00:00:00 in the UTC time zone, for the date and
time that the datestring parameter specifies. The now parameter
is not used, pass a NULL there.
This function works with valid dates and does not always detect
and reject wrong dates, such as February 30.
A "date" is a string containing several items separated by white-
space. The order of the items is immaterial. A date string may
contain many flavors of items: Can be specified several ways.
Month names can only be three-letter English abbreviations, num-
bers can be zero-prefixed and the year may use 2 or 4 digits.
Examples: 06 Nov 1994, 06-Nov-94 and Nov-94 6. This string spec-
ifies the time on a given day. You must specify it with 6 digits
with two colons: HH:MM:SS. If there is no time given in a provid-
ed date string, 00:00:00 is assumed. Example: 18:19:21. Speci-
fies international time zone. There are a few acronyms supported,
but in general you should instead use the specific relative time
compared to UTC. Supported formats include: -1200, MST, +0100.
Specifies a day of the week. Days of the week may be spelled out
in full (using English): `Sunday', `Monday', etc or they may be
abbreviated to their first three letters. This is usually not in-
fo that adds anything. If a decimal number of the form YYYYMMDD
appears, then YYYY is read as the year, MM as the month number
and DD as the day of the month, for the specified calendar date.
time_t t;
t = curl_getdate("Sun, 06 Nov 1994 08:49:37 GMT", NULL);
t = curl_getdate("Sunday, 06-Nov-94 08:49:37 GMT", NULL);
t = curl_getdate("Sun Nov 6 08:49:37 1994", NULL);
t = curl_getdate("06 Nov 1994 08:49:37 GMT", NULL);
t = curl_getdate("06-Nov-94 08:49:37 GMT", NULL);
t = curl_getdate("Nov 6 08:49:37 1994", NULL);
t = curl_getdate("06 Nov 1994 08:49:37", NULL);
t = curl_getdate("06-Nov-94 08:49:37", NULL);
t = curl_getdate("1994 Nov 6 08:49:37", NULL);
t = curl_getdate("GMT 08:49:37 06-Nov-94 Sunday", NULL);
t = curl_getdate("94 6 Nov 08:49:37", NULL);
t = curl_getdate("1994 Nov 6", NULL);
t = curl_getdate("06-Nov-94", NULL);
t = curl_getdate("Sun Nov 6 94", NULL);
t = curl_getdate("1994.Nov.6", NULL);
t = curl_getdate("Sun/Nov/6/94/GMT", NULL);
t = curl_getdate("Sun, 06 Nov 1994 08:49:37 CET", NULL);
t = curl_getdate("06 Nov 1994 08:49:37 EST", NULL);
t = curl_getdate("Sun, 12 Sep 2004 15:05:58 -0700", NULL);
t = curl_getdate("Sat, 11 Sep 2004 21:32:11 +0200", NULL);
t = curl_getdate("20040912 15:05:58 -0700", NULL);
t = curl_getdate("20040911 +0200", NULL);
This parser handles date formats specified in RFC 822 (including
the update in RFC 1123) using time zone name or time zone delta
and RFC 850 (obsoleted by RFC 1036) and ANSI C's asctime() for-
mat.
These formats are the only ones RFC 7231 says HTTP applications
may use. Always This function returns -1 when it fails to parse
the date string. Otherwise it returns the number of seconds as
described.
On systems with a signed 32 bit time_t: if the year is larger
than 2037 or less than 1903, this function returns -1.
On systems with an unsigned 32 bit time_t: if the year is larger
than 2106 or less than 1970, this function returns -1.
On systems with 64 bit time_t: if the year is less than 1583,
this function returns -1. (The Gregorian calendar was first in-
troduced 1582 so no "real" dates in this way of doing dates ex-
isted before then.)
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