/* * $Id: rfc1123.c,v 1.21.2.1 1999/02/12 19:38:15 wessels Exp $ * * DEBUG: * AUTHOR: Harvest Derived * * SQUID Internet Object Cache http://squid.nlanr.net/Squid/ * ---------------------------------------------------------- * * Squid is the result of efforts by numerous individuals from the * Internet community. Development is led by Duane Wessels of the * National Laboratory for Applied Network Research and funded by the * National Science Foundation. Squid is Copyrighted (C) 1998 by * Duane Wessels and the University of California San Diego. Please * see the COPYRIGHT file for full details. Squid incorporates * software developed and/or copyrighted by other sources. Please see * the CREDITS file for full details. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. * */ #include "config.h" /* * Adapted from HTSUtils.c in CERN httpd 3.0 (http://info.cern.ch/httpd/) * by Darren Hardy , November 1994. */ #if HAVE_STDIO_H #include #endif #if HAVE_STDLIB_H #include #endif #if HAVE_STRING_H #include #endif #if HAVE_CTYPE_H #include #endif #if HAVE_SYS_TYPES_H #include #endif #if HAVE_TIME_H #include #endif #if HAVE_SYS_TIME_H #include #endif #include "util.h" #include "snprintf.h" #define RFC850_STRFTIME "%A, %d-%b-%y %H:%M:%S GMT" #define RFC1123_STRFTIME "%a, %d %b %Y %H:%M:%S GMT" static int make_month(const char *s); static int make_num(const char *s); static char *month_names[12] = { "Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec" }; static int make_num(const char *s) { if (*s >= '0' && *s <= '9') return 10 * (*s - '0') + *(s + 1) - '0'; else return *(s + 1) - '0'; } static int make_month(const char *s) { int i; char month[3]; month[0] = xtoupper(*s); month[1] = xtolower(*(s + 1)); month[2] = xtolower(*(s + 2)); for (i = 0; i < 12; i++) if (!strncmp(month_names[i], month, 3)) return i; return 0; } time_t parse_rfc1123(const char *str) { const char *s; struct tm tm; time_t t; if (!str) return -1; memset(&tm, '\0', sizeof(struct tm)); if ((s = strchr(str, ','))) { /* Thursday, 10-Jun-93 01:29:59 GMT */ s++; /* or: Thu, 10 Jan 1993 01:29:59 GMT */ while (*s == ' ') s++; if (xisdigit(*s) && !xisdigit(*(s+1))) /* backoff if only one digit */ s--; if (strchr(s, '-')) { /* First format */ if ((int) strlen(s) < 18) return -1; tm.tm_mday = make_num(s); tm.tm_mon = make_month(s + 3); tm.tm_year = make_num(s + 7); /* * Y2K: Arjan de Vet * if tm.tm_year < 70, assume it's after the year 2000. */ if (tm.tm_year < 70) tm.tm_year += 100; tm.tm_hour = make_num(s + 10); tm.tm_min = make_num(s + 13); tm.tm_sec = make_num(s + 16); } else { /* Second format */ if ((int) strlen(s) < 20) return -1; tm.tm_mday = make_num(s); tm.tm_mon = make_month(s + 3); tm.tm_year = (100 * make_num(s + 7) - 1900) + make_num(s + 9); tm.tm_hour = make_num(s + 12); tm.tm_min = make_num(s + 15); tm.tm_sec = make_num(s + 18); } } else { /* Try the other format: */ s = str; /* Wed Jun 9 01:29:59 1993 GMT */ while (*s && *s == ' ') s++; if ((int) strlen(s) < 24) return -1; tm.tm_mday = make_num(s + 8); tm.tm_mon = make_month(s + 4); /* Y2K fix, richard.kettlewell@kewill.com */ tm.tm_year = atoi(s + 20) - 1900; tm.tm_hour = make_num(s + 11); tm.tm_min = make_num(s + 14); tm.tm_sec = make_num(s + 17); } if (tm.tm_sec < 0 || tm.tm_sec > 59 || tm.tm_min < 0 || tm.tm_min > 59 || tm.tm_hour < 0 || tm.tm_hour > 23 || tm.tm_mday < 1 || tm.tm_mday > 31 || tm.tm_mon < 0 || tm.tm_mon > 11 || tm.tm_year < 70 || tm.tm_year > 120) { return -1; } tm.tm_isdst = -1; #ifdef HAVE_TIMEGM t = timegm(&tm); #elif HAVE_TM_GMTOFF t = mktime(&tm); { struct tm *local = localtime(&t); t += local->tm_gmtoff; } #else /* some systems do not have tm_gmtoff so we fake it */ t = mktime(&tm); { time_t dst = 0; #if defined (_TIMEZONE) #elif defined (_timezone) #elif defined(_SQUID_AIX_) #else extern time_t timezone; #endif /* * The following assumes a fixed DST offset of 1 hour, * which is probably wrong. */ if (tm.tm_isdst > 0) dst = -3600; #ifdef _timezone t -= (_timezone + dst); #else t -= (timezone + dst); #endif } #endif return t; } const char * mkrfc1123(time_t t) { static char buf[128]; struct tm *gmt = gmtime(&t); buf[0] = '\0'; strftime(buf, 127, RFC1123_STRFTIME, gmt); return buf; } const char * mkhttpdlogtime(const time_t * t) { static char buf[128]; struct tm *gmt = gmtime(t); #ifndef USE_GMT int gmt_min, gmt_hour, gmt_yday, day_offset; size_t len; struct tm *lt; int min_offset; /* localtime & gmtime may use the same static data */ gmt_min = gmt->tm_min; gmt_hour = gmt->tm_hour; gmt_yday = gmt->tm_yday; lt = localtime(t); day_offset = lt->tm_yday - gmt_yday; min_offset = day_offset * 1440 + (lt->tm_hour - gmt_hour) * 60 + (lt->tm_min - gmt_min); /* wrap round on end of year */ if (day_offset > 1) day_offset = -1; else if (day_offset < -1) day_offset = 1; len = strftime(buf, 127 - 5, "%d/%b/%Y:%H:%M:%S ", lt); snprintf(buf + len, 128 - len, "%+03d%02d", (min_offset / 60) % 24, min_offset % 60); #else /* USE_GMT */ buf[0] = '\0'; strftime(buf, 127, "%d/%b/%Y:%H:%M:%S -000", gmt); #endif /* USE_GMT */ return buf; } #if 0 int main() { char *x; time_t t, pt; t = time(NULL); x = mkrfc1123(t); printf("HTTP Time: %s\n", x); pt = parse_rfc1123(x); printf("Parsed: %d vs. %d\n", pt, t); } #endif