mirror of
https://codeberg.org/kiss-community/repo
synced 2024-08-20 13:16:19 +00:00
103 lines
4.2 KiB
Groff
103 lines
4.2 KiB
Groff
.\" generated by cd2nroff 0.1 from curl_getdate.md
|
|
.TH curl_getdate 3 "2024-06-01" libcurl
|
|
.SH NAME
|
|
curl_getdate \- Convert a date string to number of seconds
|
|
.SH SYNOPSIS
|
|
.nf
|
|
#include <curl/curl.h>
|
|
|
|
time_t curl_getdate(const char *datestring, const time_t *now);
|
|
.fi
|
|
.SH DESCRIPTION
|
|
\fIcurl_getdate(3)\fP 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
|
|
\fIdatestring\fP parameter specifies. The \fInow\fP 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.
|
|
.SH PARSING DATES AND TIMES
|
|
A "date" is a string containing several items separated by whitespace. The
|
|
order of the items is immaterial. A date string may contain many flavors of
|
|
items:
|
|
.IP "calendar date items"
|
|
Can be specified several ways. Month names can only be three\-letter English
|
|
abbreviations, numbers can be zero\-prefixed and the year may use 2 or 4
|
|
digits. Examples: 06 Nov 1994, 06\-Nov\-94 and Nov\-94 6.
|
|
|
|
If the year appears to be below 100 (two\-digit), any year after 70 is assumed
|
|
to be 1900 + the given year. All others are 2000 + the given year.
|
|
.IP "time of the day items"
|
|
This string specifies 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 provided date
|
|
string, 00:00:00 is assumed. Example: 18:19:21.
|
|
.IP "time zone items"
|
|
Specifies 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.
|
|
.IP "day of the week items"
|
|
Specifies a day of the week. Days of the week may be spelled out in full
|
|
(using English): \(aqSunday\(aq, \(aqMonday\(aq, etc or they may be abbreviated to their
|
|
first three letters. This is usually not info that adds anything.
|
|
.IP "pure numbers"
|
|
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.
|
|
.SH PROTOCOLS
|
|
All
|
|
.SH EXAMPLE
|
|
.nf
|
|
int main(void)
|
|
{
|
|
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);
|
|
}
|
|
.fi
|
|
.SH STANDARDS
|
|
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\(aqs \fIasctime()\fP format.
|
|
|
|
These formats are the only ones RFC 7231 says HTTP applications may use.
|
|
.SH AVAILABILITY
|
|
Always
|
|
.SH RETURN VALUE
|
|
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 introduced 1582 so no "real"
|
|
dates in this way of doing dates existed before then.)
|
|
.SH SEE ALSO
|
|
.BR CURLOPT_TIMECONDITION (3),
|
|
.BR CURLOPT_TIMEVALUE (3),
|
|
.BR curl_easy_escape (3),
|
|
.BR curl_easy_unescape (3)
|