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authorhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
committerhongbotian <hongbo.tianhongbo@huawei.com>2015-11-30 01:45:08 -0500
commite8ec7aa8e38a93f5b034ac74cebce5de23710317 (patch)
treeaa031937bf856c1f8d6ad7877b8d2cb0224da5ef /rubbos/app/httpd-2.0.64/srclib/apr-util/misc/apr_date.c
parentcc40af334e619bb549038238507407866f774f8f (diff)
upload http
JIRA: BOTTLENECK-10 Change-Id: I7598427ff904df438ce77c2819ee48ac75ffa8da Signed-off-by: hongbotian <hongbo.tianhongbo@huawei.com>
Diffstat (limited to 'rubbos/app/httpd-2.0.64/srclib/apr-util/misc/apr_date.c')
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diff --git a/rubbos/app/httpd-2.0.64/srclib/apr-util/misc/apr_date.c b/rubbos/app/httpd-2.0.64/srclib/apr-util/misc/apr_date.c
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+/* Copyright 2000-2005 The Apache Software Foundation or its licensors, as
+ * applicable.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+/*
+ * apr_date.c: date parsing utility routines
+ * These routines are (hopefully) platform independent.
+ *
+ * 27 Oct 1996 Roy Fielding
+ * Extracted (with many modifications) from mod_proxy.c and
+ * tested with over 50,000 randomly chosen valid date strings
+ * and several hundred variations of invalid date strings.
+ *
+ */
+
+#include "apr.h"
+#include "apr_lib.h"
+
+#define APR_WANT_STRFUNC
+#include "apr_want.h"
+
+#if APR_HAVE_STDLIB_H
+#include <stdlib.h>
+#endif
+
+#if APR_HAVE_CTYPE_H
+#include <ctype.h>
+#endif
+
+#include "apr_date.h"
+
+/*
+ * Compare a string to a mask
+ * Mask characters (arbitrary maximum is 256 characters, just in case):
+ * @ - uppercase letter
+ * $ - lowercase letter
+ * & - hex digit
+ * # - digit
+ * ~ - digit or space
+ * * - swallow remaining characters
+ * <x> - exact match for any other character
+ */
+APU_DECLARE(int) apr_date_checkmask(const char *data, const char *mask)
+{
+ int i;
+ char d;
+
+ for (i = 0; i < 256; i++) {
+ d = data[i];
+ switch (mask[i]) {
+ case '\0':
+ return (d == '\0');
+
+ case '*':
+ return 1;
+
+ case '@':
+ if (!apr_isupper(d))
+ return 0;
+ break;
+ case '$':
+ if (!apr_islower(d))
+ return 0;
+ break;
+ case '#':
+ if (!apr_isdigit(d))
+ return 0;
+ break;
+ case '&':
+ if (!apr_isxdigit(d))
+ return 0;
+ break;
+ case '~':
+ if ((d != ' ') && !apr_isdigit(d))
+ return 0;
+ break;
+ default:
+ if (mask[i] != d)
+ return 0;
+ break;
+ }
+ }
+ return 0; /* We only get here if mask is corrupted (exceeds 256) */
+}
+
+/*
+ * Parses an HTTP date in one of three standard forms:
+ *
+ * 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
+ *
+ * and returns the apr_time_t number of microseconds since 1 Jan 1970 GMT,
+ * or APR_DATE_BAD if this would be out of range or if the date is invalid.
+ *
+ * The restricted HTTP syntax is
+ *
+ * HTTP-date = rfc1123-date | rfc850-date | asctime-date
+ *
+ * rfc1123-date = wkday "," SP date1 SP time SP "GMT"
+ * rfc850-date = weekday "," SP date2 SP time SP "GMT"
+ * asctime-date = wkday SP date3 SP time SP 4DIGIT
+ *
+ * date1 = 2DIGIT SP month SP 4DIGIT
+ * ; day month year (e.g., 02 Jun 1982)
+ * date2 = 2DIGIT "-" month "-" 2DIGIT
+ * ; day-month-year (e.g., 02-Jun-82)
+ * date3 = month SP ( 2DIGIT | ( SP 1DIGIT ))
+ * ; month day (e.g., Jun 2)
+ *
+ * time = 2DIGIT ":" 2DIGIT ":" 2DIGIT
+ * ; 00:00:00 - 23:59:59
+ *
+ * wkday = "Mon" | "Tue" | "Wed"
+ * | "Thu" | "Fri" | "Sat" | "Sun"
+ *
+ * weekday = "Monday" | "Tuesday" | "Wednesday"
+ * | "Thursday" | "Friday" | "Saturday" | "Sunday"
+ *
+ * month = "Jan" | "Feb" | "Mar" | "Apr"
+ * | "May" | "Jun" | "Jul" | "Aug"
+ * | "Sep" | "Oct" | "Nov" | "Dec"
+ *
+ * However, for the sake of robustness (and Netscapeness), we ignore the
+ * weekday and anything after the time field (including the timezone).
+ *
+ * This routine is intended to be very fast; 10x faster than using sscanf.
+ *
+ * Originally from Andrew Daviel <andrew@vancouver-webpages.com>, 29 Jul 96
+ * but many changes since then.
+ *
+ */
+APU_DECLARE(apr_time_t) apr_date_parse_http(const char *date)
+{
+ apr_time_exp_t ds;
+ apr_time_t result;
+ int mint, mon;
+ const char *monstr, *timstr;
+ static const int months[12] =
+ {
+ ('J' << 16) | ('a' << 8) | 'n', ('F' << 16) | ('e' << 8) | 'b',
+ ('M' << 16) | ('a' << 8) | 'r', ('A' << 16) | ('p' << 8) | 'r',
+ ('M' << 16) | ('a' << 8) | 'y', ('J' << 16) | ('u' << 8) | 'n',
+ ('J' << 16) | ('u' << 8) | 'l', ('A' << 16) | ('u' << 8) | 'g',
+ ('S' << 16) | ('e' << 8) | 'p', ('O' << 16) | ('c' << 8) | 't',
+ ('N' << 16) | ('o' << 8) | 'v', ('D' << 16) | ('e' << 8) | 'c'};
+
+ if (!date)
+ return APR_DATE_BAD;
+
+ while (*date && apr_isspace(*date)) /* Find first non-whitespace char */
+ ++date;
+
+ if (*date == '\0')
+ return APR_DATE_BAD;
+
+ if ((date = strchr(date, ' ')) == NULL) /* Find space after weekday */
+ return APR_DATE_BAD;
+
+ ++date; /* Now pointing to first char after space, which should be */
+
+ /* start of the actual date information for all 4 formats. */
+
+ if (apr_date_checkmask(date, "## @$$ #### ##:##:## *")) {
+ /* RFC 1123 format with two days */
+ ds.tm_year = ((date[7] - '0') * 10 + (date[8] - '0') - 19) * 100;
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[9] - '0') * 10) + (date[10] - '0');
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 12;
+ }
+ else if (apr_date_checkmask(date, "##-@$$-## ##:##:## *")) {
+ /* RFC 850 format */
+ ds.tm_year = ((date[7] - '0') * 10) + (date[8] - '0');
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 10;
+ }
+ else if (apr_date_checkmask(date, "@$$ ~# ##:##:## ####*")) {
+ /* asctime format */
+ ds.tm_year = ((date[16] - '0') * 10 + (date[17] - '0') - 19) * 100;
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[18] - '0') * 10) + (date[19] - '0');
+
+ if (date[4] == ' ')
+ ds.tm_mday = 0;
+ else
+ ds.tm_mday = (date[4] - '0') * 10;
+
+ ds.tm_mday += (date[5] - '0');
+
+ monstr = date;
+ timstr = date + 7;
+ }
+ else if (apr_date_checkmask(date, "# @$$ #### ##:##:## *")) {
+ /* RFC 1123 format with one day */
+ ds.tm_year = ((date[6] - '0') * 10 + (date[7] - '0') - 19) * 100;
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[8] - '0') * 10) + (date[9] - '0');
+
+ ds.tm_mday = (date[0] - '0');
+
+ monstr = date + 2;
+ timstr = date + 11;
+ }
+ else
+ return APR_DATE_BAD;
+
+ if (ds.tm_mday <= 0 || ds.tm_mday > 31)
+ return APR_DATE_BAD;
+
+ ds.tm_hour = ((timstr[0] - '0') * 10) + (timstr[1] - '0');
+ ds.tm_min = ((timstr[3] - '0') * 10) + (timstr[4] - '0');
+ ds.tm_sec = ((timstr[6] - '0') * 10) + (timstr[7] - '0');
+
+ if ((ds.tm_hour > 23) || (ds.tm_min > 59) || (ds.tm_sec > 61))
+ return APR_DATE_BAD;
+
+ mint = (monstr[0] << 16) | (monstr[1] << 8) | monstr[2];
+ for (mon = 0; mon < 12; mon++)
+ if (mint == months[mon])
+ break;
+
+ if (mon == 12)
+ return APR_DATE_BAD;
+
+ if ((ds.tm_mday == 31) && (mon == 3 || mon == 5 || mon == 8 || mon == 10))
+ return APR_DATE_BAD;
+
+ /* February gets special check for leapyear */
+ if ((mon == 1) &&
+ ((ds.tm_mday > 29) ||
+ ((ds.tm_mday == 29)
+ && ((ds.tm_year & 3)
+ || (((ds.tm_year % 100) == 0)
+ && (((ds.tm_year % 400) != 100)))))))
+ return APR_DATE_BAD;
+
+ ds.tm_mon = mon;
+
+ /* ap_mplode_time uses tm_usec and tm_gmtoff fields, but they haven't
+ * been set yet.
+ * It should be safe to just zero out these values.
+ * tm_usec is the number of microseconds into the second. HTTP only
+ * cares about second granularity.
+ * tm_gmtoff is the number of seconds off of GMT the time is. By
+ * definition all times going through this function are in GMT, so this
+ * is zero.
+ */
+ ds.tm_usec = 0;
+ ds.tm_gmtoff = 0;
+ if (apr_time_exp_get(&result, &ds) != APR_SUCCESS)
+ return APR_DATE_BAD;
+
+ return result;
+}
+
+/*
+ * Parses a string resembling an RFC 822 date. This is meant to be
+ * leinent in its parsing of dates. Hence, this will parse a wider
+ * range of dates than apr_date_parse_http.
+ *
+ * The prominent mailer (or poster, if mailer is unknown) that has
+ * been seen in the wild is included for the unknown formats.
+ *
+ * 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
+ * Sun, 6 Nov 1994 08:49:37 GMT ; RFC 822, updated by RFC 1123
+ * Sun, 06 Nov 94 08:49:37 GMT ; RFC 822
+ * Sun, 6 Nov 94 08:49:37 GMT ; RFC 822
+ * Sun, 06 Nov 94 08:49 GMT ; Unknown [drtr@ast.cam.ac.uk]
+ * Sun, 6 Nov 94 08:49 GMT ; Unknown [drtr@ast.cam.ac.uk]
+ * Sun, 06 Nov 94 8:49:37 GMT ; Unknown [Elm 70.85]
+ * Sun, 6 Nov 94 8:49:37 GMT ; Unknown [Elm 70.85]
+ * Mon, 7 Jan 2002 07:21:22 GMT ; Unknown [Postfix]
+ * Sun, 06-Nov-1994 08:49:37 GMT ; RFC 850 with four digit years
+ *
+ */
+
+#define TIMEPARSE(ds,hr10,hr1,min10,min1,sec10,sec1) \
+ { \
+ ds.tm_hour = ((hr10 - '0') * 10) + (hr1 - '0'); \
+ ds.tm_min = ((min10 - '0') * 10) + (min1 - '0'); \
+ ds.tm_sec = ((sec10 - '0') * 10) + (sec1 - '0'); \
+ }
+#define TIMEPARSE_STD(ds,timstr) \
+ { \
+ TIMEPARSE(ds, timstr[0],timstr[1], \
+ timstr[3],timstr[4], \
+ timstr[6],timstr[7]); \
+ }
+
+APU_DECLARE(apr_time_t) apr_date_parse_rfc(const char *date)
+{
+ apr_time_exp_t ds;
+ apr_time_t result;
+ int mint, mon;
+ const char *monstr, *timstr, *gmtstr;
+ static const int months[12] =
+ {
+ ('J' << 16) | ('a' << 8) | 'n', ('F' << 16) | ('e' << 8) | 'b',
+ ('M' << 16) | ('a' << 8) | 'r', ('A' << 16) | ('p' << 8) | 'r',
+ ('M' << 16) | ('a' << 8) | 'y', ('J' << 16) | ('u' << 8) | 'n',
+ ('J' << 16) | ('u' << 8) | 'l', ('A' << 16) | ('u' << 8) | 'g',
+ ('S' << 16) | ('e' << 8) | 'p', ('O' << 16) | ('c' << 8) | 't',
+ ('N' << 16) | ('o' << 8) | 'v', ('D' << 16) | ('e' << 8) | 'c' };
+
+ if (!date)
+ return APR_DATE_BAD;
+
+ /* Not all dates have text months at the beginning. */
+ if (!apr_isdigit(date[0]))
+ {
+ while (*date && apr_isspace(*date)) /* Find first non-whitespace char */
+ ++date;
+
+ if (*date == '\0')
+ return APR_DATE_BAD;
+
+ if ((date = strchr(date, ' ')) == NULL) /* Find space after weekday */
+ return APR_DATE_BAD;
+
+ ++date; /* Now pointing to first char after space, which should be */ }
+
+ /* start of the actual date information for all 11 formats. */
+ if (apr_date_checkmask(date, "## @$$ #### ##:##:## *")) { /* RFC 1123 format */
+ ds.tm_year = ((date[7] - '0') * 10 + (date[8] - '0') - 19) * 100;
+
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[9] - '0') * 10) + (date[10] - '0');
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 12;
+ gmtstr = date + 20;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "##-@$$-## ##:##:## *")) {/* RFC 850 format */
+ ds.tm_year = ((date[7] - '0') * 10) + (date[8] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 10;
+ gmtstr = date + 19;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "@$$ ~# ##:##:## ####*")) {
+ /* asctime format */
+ ds.tm_year = ((date[16] - '0') * 10 + (date[17] - '0') - 19) * 100;
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[18] - '0') * 10) + (date[19] - '0');
+
+ if (date[4] == ' ')
+ ds.tm_mday = 0;
+ else
+ ds.tm_mday = (date[4] - '0') * 10;
+
+ ds.tm_mday += (date[5] - '0');
+
+ monstr = date;
+ timstr = date + 7;
+ gmtstr = NULL;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "# @$$ #### ##:##:## *")) {
+ /* RFC 1123 format*/
+ ds.tm_year = ((date[6] - '0') * 10 + (date[7] - '0') - 19) * 100;
+
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[8] - '0') * 10) + (date[9] - '0');
+ ds.tm_mday = (date[0] - '0');
+
+ monstr = date + 2;
+ timstr = date + 11;
+ gmtstr = date + 20;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "## @$$ ## ##:##:## *")) {
+ /* This is the old RFC 1123 date format - many many years ago, people
+ * used two-digit years. Oh, how foolish. */
+ ds.tm_year = ((date[7] - '0') * 10) + (date[8] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 10;
+ gmtstr = date + 19;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "# @$$ ## ##:##:## *")) {
+ /* This is the old RFC 1123 date format - many many years ago, people
+ * used two-digit years. Oh, how foolish. */
+ ds.tm_year = ((date[6] - '0') * 10) + (date[7] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = (date[0] - '0');
+
+ monstr = date + 2;
+ timstr = date + 9;
+ gmtstr = date + 18;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "## @$$ ## ##:## *")) {
+ /* Loser format. This is quite bogus. */
+ ds.tm_year = ((date[7] - '0') * 10) + (date[8] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 10;
+ gmtstr = NULL;
+
+ TIMEPARSE(ds, timstr[0],timstr[1], timstr[3],timstr[4], '0','0');
+ }
+ else if (apr_date_checkmask(date, "# @$$ ## ##:## *")) {
+ /* Loser format. This is quite bogus. */
+ ds.tm_year = ((date[6] - '0') * 10) + (date[7] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = (date[0] - '0');
+
+ monstr = date + 2;
+ timstr = date + 9;
+ gmtstr = NULL;
+
+ TIMEPARSE(ds, timstr[0],timstr[1], timstr[3],timstr[4], '0','0');
+ }
+ else if (apr_date_checkmask(date, "## @$$ ## #:##:## *")) {
+ /* Loser format. This is quite bogus. */
+ ds.tm_year = ((date[7] - '0') * 10) + (date[8] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 9;
+ gmtstr = date + 18;
+
+ TIMEPARSE(ds, '0',timstr[1], timstr[3],timstr[4], timstr[6],timstr[7]);
+ }
+ else if (apr_date_checkmask(date, "# @$$ ## #:##:## *")) {
+ /* Loser format. This is quite bogus. */
+ ds.tm_year = ((date[6] - '0') * 10) + (date[7] - '0');
+
+ if (ds.tm_year < 70)
+ ds.tm_year += 100;
+
+ ds.tm_mday = (date[0] - '0');
+
+ monstr = date + 2;
+ timstr = date + 8;
+ gmtstr = date + 17;
+
+ TIMEPARSE(ds, '0',timstr[1], timstr[3],timstr[4], timstr[6],timstr[7]);
+ }
+ else if (apr_date_checkmask(date, " # @$$ #### ##:##:## *")) {
+ /* RFC 1123 format with a space instead of a leading zero. */
+ ds.tm_year = ((date[7] - '0') * 10 + (date[8] - '0') - 19) * 100;
+
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[9] - '0') * 10) + (date[10] - '0');
+
+ ds.tm_mday = (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 12;
+ gmtstr = date + 20;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else if (apr_date_checkmask(date, "##-@$$-#### ##:##:## *")) {
+ /* RFC 1123 with dashes instead of spaces between date/month/year
+ * This also looks like RFC 850 with four digit years.
+ */
+ ds.tm_year = ((date[7] - '0') * 10 + (date[8] - '0') - 19) * 100;
+ if (ds.tm_year < 0)
+ return APR_DATE_BAD;
+
+ ds.tm_year += ((date[9] - '0') * 10) + (date[10] - '0');
+
+ ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');
+
+ monstr = date + 3;
+ timstr = date + 12;
+ gmtstr = date + 21;
+
+ TIMEPARSE_STD(ds, timstr);
+ }
+ else
+ return APR_DATE_BAD;
+
+ if (ds.tm_mday <= 0 || ds.tm_mday > 31)
+ return APR_DATE_BAD;
+
+ if ((ds.tm_hour > 23) || (ds.tm_min > 59) || (ds.tm_sec > 61))
+ return APR_DATE_BAD;
+
+ mint = (monstr[0] << 16) | (monstr[1] << 8) | monstr[2];
+ for (mon = 0; mon < 12; mon++)
+ if (mint == months[mon])
+ break;
+
+ if (mon == 12)
+ return APR_DATE_BAD;
+
+ if ((ds.tm_mday == 31) && (mon == 3 || mon == 5 || mon == 8 || mon == 10))
+ return APR_DATE_BAD;
+
+ /* February gets special check for leapyear */
+
+ if ((mon == 1) &&
+ ((ds.tm_mday > 29)
+ || ((ds.tm_mday == 29)
+ && ((ds.tm_year & 3)
+ || (((ds.tm_year % 100) == 0)
+ && (((ds.tm_year % 400) != 100)))))))
+ return APR_DATE_BAD;
+
+ ds.tm_mon = mon;
+
+ /* tm_gmtoff is the number of seconds off of GMT the time is.
+ *
+ * We only currently support: [+-]ZZZZ where Z is the offset in
+ * hours from GMT.
+ *
+ * If there is any confusion, tm_gmtoff will remain 0.
+ */
+ ds.tm_gmtoff = 0;
+ if (gmtstr && *gmtstr != '\0') {
+ /* Do we have a GMT? */
+ if (*(++gmtstr) != '\0') {
+ int offset;
+ switch (*(gmtstr++)) {
+ case '-':
+ offset = atoi(gmtstr);
+ ds.tm_gmtoff -= (offset / 100) * 60 * 60;
+ ds.tm_gmtoff -= (offset % 100) * 60;
+ break;
+ case '+':
+ offset = atoi(gmtstr);
+ ds.tm_gmtoff += (offset / 100) * 60 * 60;
+ ds.tm_gmtoff += (offset % 100) * 60;
+ break;
+ }
+ }
+ }
+
+ /* apr_time_exp_get uses tm_usec field, but it hasn't been set yet.
+ * It should be safe to just zero out this value.
+ * tm_usec is the number of microseconds into the second. HTTP only
+ * cares about second granularity.
+ */
+ ds.tm_usec = 0;
+
+ if (apr_time_exp_gmt_get(&result, &ds) != APR_SUCCESS)
+ return APR_DATE_BAD;
+
+ return result;
+}