mirror of
https://github.com/moparisthebest/curl
synced 2024-11-14 05:25:06 -05:00
399 lines
10 KiB
C
399 lines
10 KiB
C
/***************************************************************************
|
|
* _ _ ____ _
|
|
* Project ___| | | | _ \| |
|
|
* / __| | | | |_) | |
|
|
* | (__| |_| | _ <| |___
|
|
* \___|\___/|_| \_\_____|
|
|
*
|
|
* Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
|
|
*
|
|
* This software is licensed as described in the file COPYING, which
|
|
* you should have received as part of this distribution. The terms
|
|
* are also available at http://curl.haxx.se/docs/copyright.html.
|
|
*
|
|
* You may opt to use, copy, modify, merge, publish, distribute and/or sell
|
|
* copies of the Software, and permit persons to whom the Software is
|
|
* furnished to do so, under the terms of the COPYING file.
|
|
*
|
|
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
|
|
* KIND, either express or implied.
|
|
*
|
|
* $Id$
|
|
***************************************************************************/
|
|
/*
|
|
A brief summary of the date string formats this parser groks:
|
|
|
|
RFC 2616 3.3.1
|
|
|
|
Sun, 06 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
|
|
Sunday, 06-Nov-94 08:49:37 GMT ; RFC 850, obsoleted by RFC 1036
|
|
Sun Nov 6 08:49:37 1994 ; ANSI C's asctime() format
|
|
|
|
we support dates without week day name:
|
|
|
|
06 Nov 1994 08:49:37 GMT
|
|
06-Nov-94 08:49:37 GMT
|
|
Nov 6 08:49:37 1994
|
|
|
|
without the time zone:
|
|
|
|
06 Nov 1994 08:49:37
|
|
06-Nov-94 08:49:37
|
|
|
|
weird order:
|
|
|
|
1994 Nov 6 08:49:37 (GNU date fails)
|
|
GMT 08:49:37 06-Nov-94 Sunday
|
|
94 6 Nov 08:49:37 (GNU date fails)
|
|
|
|
time left out:
|
|
|
|
1994 Nov 6
|
|
06-Nov-94
|
|
Sun Nov 6 94
|
|
|
|
unusual separators:
|
|
|
|
1994.Nov.6
|
|
Sun/Nov/6/94/GMT
|
|
|
|
commonly used time zone names:
|
|
|
|
Sun, 06 Nov 1994 08:49:37 CET
|
|
06 Nov 1994 08:49:37 EST
|
|
|
|
time zones specified using RFC822 style:
|
|
|
|
Sun, 12 Sep 2004 15:05:58 -0700
|
|
Sat, 11 Sep 2004 21:32:11 +0200
|
|
|
|
compact numerical date strings:
|
|
|
|
20040912 15:05:58 -0700
|
|
20040911 +0200
|
|
|
|
*/
|
|
#include "setup.h"
|
|
#include <stdio.h>
|
|
#include <ctype.h>
|
|
#include <string.h>
|
|
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h> /* for strtol() */
|
|
#endif
|
|
|
|
#include <curl/curl.h>
|
|
|
|
static time_t Curl_parsedate(const char *date);
|
|
|
|
static const char *wkday[] = {"Mon", "Tue", "Wed", "Thu", "Fri", "Sat", "Sun"};
|
|
static const char *weekday[] = { "Monday", "Tuesday", "Wednesday", "Thursday",
|
|
"Friday", "Saturday", "Sunday" };
|
|
static const char *month[]= { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul",
|
|
"Aug", "Sep", "Oct", "Nov", "Dec" };
|
|
|
|
struct tzinfo {
|
|
const char *name;
|
|
int offset; /* +/- in minutes */
|
|
};
|
|
|
|
/* Here's a bunch of frequently used time zone names. These were supported
|
|
by the old getdate parser. */
|
|
static const struct tzinfo tz[]= {
|
|
{"GMT", 0}, /* Greenwich Mean */
|
|
{"UTC", 0}, /* Universal (Coordinated) */
|
|
{"WET", 0}, /* Western European */
|
|
{"BST", 0}, /* British Summer */
|
|
{"WAT", 60}, /* West Africa */
|
|
{"AST", 240}, /* Atlantic Standard */
|
|
{"ADT", 240}, /* Atlantic Daylight */
|
|
{"EST", 300}, /* Eastern Standard */
|
|
{"EDT", 300}, /* Eastern Daylight */
|
|
{"CST", 360}, /* Central Standard */
|
|
{"CDT", 360}, /* Central Daylight */
|
|
{"MST", 420}, /* Mountain Standard */
|
|
{"MDT", 420}, /* Mountain Daylight */
|
|
{"PST", 480}, /* Pacific Standard */
|
|
{"PDT", 480}, /* Pacific Daylight */
|
|
{"YST", 540}, /* Yukon Standard */
|
|
{"YDT", 540}, /* Yukon Daylight */
|
|
{"HST", 600}, /* Hawaii Standard */
|
|
{"HDT", 600}, /* Hawaii Daylight */
|
|
{"CAT", 600}, /* Central Alaska */
|
|
{"AHST", 600}, /* Alaska-Hawaii Standard */
|
|
{"NT", 660}, /* Nome */
|
|
{"IDLW", 720}, /* International Date Line West */
|
|
{"CET", -60}, /* Central European */
|
|
{"MET", -60}, /* Middle European */
|
|
{"MEWT", -60}, /* Middle European Winter */
|
|
{"MEST", -120}, /* Middle European Summer */
|
|
{"CEST", -120}, /* Central European Summer */
|
|
{"MESZ", -60}, /* Middle European Summer */
|
|
{"FWT", -60}, /* French Winter */
|
|
{"FST", -60}, /* French Summer */
|
|
{"EET", -120}, /* Eastern Europe, USSR Zone 1 */
|
|
{"WAST", -420}, /* West Australian Standard */
|
|
{"WADT", -420}, /* West Australian Daylight */
|
|
{"CCT", -480}, /* China Coast, USSR Zone 7 */
|
|
{"JST", -540}, /* Japan Standard, USSR Zone 8 */
|
|
{"EAST", -600}, /* Eastern Australian Standard */
|
|
{"EADT", -600}, /* Eastern Australian Daylight */
|
|
{"GST", -600}, /* Guam Standard, USSR Zone 9 */
|
|
{"NZT", -720}, /* New Zealand */
|
|
{"NZST", -720}, /* New Zealand Standard */
|
|
{"NZDT", -720}, /* New Zealand Daylight */
|
|
{"IDLE", -720}, /* International Date Line East */
|
|
};
|
|
|
|
/* returns:
|
|
-1 no day
|
|
0 monday - 6 sunday
|
|
*/
|
|
|
|
static int checkday(char *check, size_t len)
|
|
{
|
|
int i;
|
|
const char **what;
|
|
bool found= FALSE;
|
|
if(len > 3)
|
|
what = &weekday[0];
|
|
else
|
|
what = &wkday[0];
|
|
for(i=0; i<7; i++) {
|
|
if(curl_strequal(check, what[0])) {
|
|
found=TRUE;
|
|
break;
|
|
}
|
|
what++;
|
|
}
|
|
return found?i:-1;
|
|
}
|
|
|
|
static int checkmonth(char *check)
|
|
{
|
|
int i;
|
|
const char **what;
|
|
bool found= FALSE;
|
|
|
|
what = &month[0];
|
|
for(i=0; i<12; i++) {
|
|
if(curl_strequal(check, what[0])) {
|
|
found=TRUE;
|
|
break;
|
|
}
|
|
what++;
|
|
}
|
|
return found?i:-1; /* return the offset or -1, no real offset is -1 */
|
|
}
|
|
|
|
/* return the time zone offset between GMT and the input one, in number
|
|
of seconds or -1 if the timezone wasn't found/legal */
|
|
|
|
static int checktz(char *check)
|
|
{
|
|
unsigned int i;
|
|
const struct tzinfo *what;
|
|
bool found= FALSE;
|
|
|
|
what = tz;
|
|
for(i=0; i< sizeof(tz)/sizeof(tz[0]); i++) {
|
|
if(curl_strequal(check, what->name)) {
|
|
found=TRUE;
|
|
break;
|
|
}
|
|
what++;
|
|
}
|
|
return found?what->offset*60:-1;
|
|
}
|
|
|
|
static void skip(const char **date)
|
|
{
|
|
/* skip everything that aren't letters or digits */
|
|
while(**date && !isalnum((int)**date))
|
|
(*date)++;
|
|
}
|
|
|
|
enum assume {
|
|
DATE_MDAY,
|
|
DATE_YEAR,
|
|
DATE_TIME
|
|
};
|
|
|
|
static time_t Curl_parsedate(const char *date)
|
|
{
|
|
time_t t = 0;
|
|
int wdaynum=-1; /* day of the week number, 0-6 (mon-sun) */
|
|
int monnum=-1; /* month of the year number, 0-11 */
|
|
int mdaynum=-1; /* day of month, 1 - 31 */
|
|
int hournum=-1;
|
|
int minnum=-1;
|
|
int secnum=-1;
|
|
int yearnum=-1;
|
|
int tzoff=-1;
|
|
struct tm tm;
|
|
enum assume dignext = DATE_MDAY;
|
|
const char *indate = date; /* save the original pointer */
|
|
|
|
int part = 0; /* max 6 parts */
|
|
|
|
while(*date && (part < 6)) {
|
|
bool found=FALSE;
|
|
|
|
skip(&date);
|
|
|
|
if(isalpha((int)*date)) {
|
|
/* a name coming up */
|
|
char buf[32]="";
|
|
size_t len;
|
|
sscanf(date, "%31[A-Za-z]", buf);
|
|
len = strlen(buf);
|
|
|
|
if(wdaynum == -1) {
|
|
wdaynum = checkday(buf, len);
|
|
if(wdaynum != -1)
|
|
found = TRUE;
|
|
}
|
|
if(!found && (monnum == -1)) {
|
|
monnum = checkmonth(buf);
|
|
if(monnum != -1)
|
|
found = TRUE;
|
|
}
|
|
|
|
if(!found && (tzoff == -1)) {
|
|
/* this just must be a time zone string */
|
|
tzoff = checktz(buf);
|
|
if(tzoff != -1)
|
|
found = TRUE;
|
|
}
|
|
|
|
if(!found)
|
|
return -1; /* bad string */
|
|
|
|
date += len;
|
|
}
|
|
else if(isdigit((int)*date)) {
|
|
/* a digit */
|
|
int val;
|
|
char *end;
|
|
if((secnum == -1) &&
|
|
(3 == sscanf(date, "%02d:%02d:%02d", &hournum, &minnum, &secnum))) {
|
|
/* time stamp! */
|
|
date += 8;
|
|
found = TRUE;
|
|
}
|
|
else {
|
|
val = (int)strtol(date, &end, 10);
|
|
|
|
if((tzoff == -1) &&
|
|
((end - date) == 4) &&
|
|
(val < 1300) &&
|
|
(indate< date) &&
|
|
((date[-1] == '+' || date[-1] == '-'))) {
|
|
/* four digits and a value less than 1300 and it is preceeded with
|
|
a plus or minus. This is a time zone indication. */
|
|
found = TRUE;
|
|
tzoff = (val/100 * 60 + val%100)*60;
|
|
|
|
/* the + and - prefix indicates the local time compared to GMT,
|
|
this we need ther reversed math to get what we want */
|
|
tzoff = date[-1]=='+'?-tzoff:tzoff;
|
|
}
|
|
|
|
if(((end - date) == 8) &&
|
|
(yearnum == -1) &&
|
|
(monnum == -1) &&
|
|
(mdaynum == -1)) {
|
|
/* 8 digits, no year, month or day yet. This is YYYYMMDD */
|
|
found = TRUE;
|
|
yearnum = val/10000;
|
|
monnum = (val%10000)/100-1; /* month is 0 - 11 */
|
|
mdaynum = val%100;
|
|
}
|
|
|
|
if(!found && (dignext == DATE_MDAY) && (mdaynum == -1)) {
|
|
if((val > 0) && (val<32)) {
|
|
mdaynum = val;
|
|
found = TRUE;
|
|
}
|
|
dignext = DATE_YEAR;
|
|
}
|
|
|
|
if(!found && (dignext == DATE_YEAR) && (yearnum == -1)) {
|
|
yearnum = val;
|
|
found = TRUE;
|
|
if(yearnum < 1900) {
|
|
if (yearnum > 70)
|
|
yearnum += 1900;
|
|
else
|
|
yearnum += 2000;
|
|
}
|
|
if(mdaynum == -1)
|
|
dignext = DATE_MDAY;
|
|
}
|
|
|
|
if(!found)
|
|
return -1;
|
|
|
|
date = end;
|
|
}
|
|
}
|
|
|
|
part++;
|
|
}
|
|
|
|
if(-1 == secnum)
|
|
secnum = minnum = hournum = 0; /* no time, make it zero */
|
|
|
|
if((-1 == mdaynum) ||
|
|
(-1 == monnum) ||
|
|
(-1 == yearnum))
|
|
/* lacks vital info, fail */
|
|
return -1;
|
|
|
|
tm.tm_sec = secnum;
|
|
tm.tm_min = minnum;
|
|
tm.tm_hour = hournum;
|
|
tm.tm_mday = mdaynum;
|
|
tm.tm_mon = monnum;
|
|
tm.tm_year = yearnum - 1900;
|
|
tm.tm_wday = 0;
|
|
tm.tm_yday = 0;
|
|
tm.tm_isdst = 0;
|
|
|
|
t = mktime(&tm);
|
|
|
|
/* time zone adjust */
|
|
{
|
|
struct tm *gmt;
|
|
long delta;
|
|
time_t t2;
|
|
|
|
#ifdef HAVE_GMTIME_R
|
|
/* thread-safe version */
|
|
struct tm keeptime2;
|
|
gmt = (struct tm *)gmtime_r(&t, &keeptime2);
|
|
#else
|
|
gmt = gmtime(&t); /* use gmtime_r() if available */
|
|
#endif
|
|
|
|
t2 = mktime(gmt);
|
|
|
|
/* Add the time zone diff (between the given timezone and GMT) and the
|
|
diff between the local time zone and GMT. */
|
|
delta = (tzoff!=-1?tzoff:0) + (t - t2);
|
|
|
|
if((delta>0) && (t + delta < t))
|
|
return -1; /* time_t overflow */
|
|
|
|
t += delta;
|
|
}
|
|
|
|
return t;
|
|
}
|
|
|
|
time_t curl_getdate(const char *p, const time_t *now)
|
|
{
|
|
(void)now;
|
|
return Curl_parsedate(p);
|
|
}
|