-//
-// Utility functions
-//
-// Copyright (c) 1996-2021 by the citadel.org team
-//
-// This program is open source software. It runs great on the
-// Linux operating system (and probably elsewhere). You can use,
-// copy, and run it under the terms of the GNU General Public
-// License version 3.
-//
-// 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.
-
-#include "webcit.h"
-
-
-// remove escaped strings from i.e. the url string (like %20 for blanks)
-int unescape_input(char *buf) {
- unsigned int a, b;
- char hex[3];
- long buflen;
- long len;
-
- buflen = strlen(buf);
-
- while ((buflen > 0) && (isspace(buf[buflen - 1]))) {
- buf[buflen - 1] = 0;
- buflen--;
- }
-
- a = 0;
- while (a < buflen) {
- if (buf[a] == '+')
- buf[a] = ' ';
- if (buf[a] == '%') {
- // don't let % chars through, rather truncate the input.
- if (a + 2 > buflen) {
- buf[a] = '\0';
- buflen = a;
- }
- else {
- hex[0] = buf[a + 1];
- hex[1] = buf[a + 2];
- hex[2] = 0;
- b = 0;
- b = decode_hex(hex);
- buf[a] = (char) b;
- len = buflen - a - 2;
- if (len > 0)
- memmove(&buf[a + 1], &buf[a + 3], len);
-
- buflen -= 2;
- }
- }
- a++;
- }
- return a;
-}
-
-
-// Supplied with a unix timestamp, generate a textual time/date stamp.
-// Caller owns the returned memory.
-char *http_datestring(time_t xtime) {
-
- // HTTP Months - do not translate - these are not for human consumption
- static char *httpdate_months[] = {
- "Jan", "Feb", "Mar", "Apr", "May", "Jun",
- "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
- };
-
- // HTTP Weekdays - do not translate - these are not for human consumption
- static char *httpdate_weekdays[] = {
- "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
- };
-
- struct tm t;
- long offset;
- char offsign;
- int n = 40;
- char *buf = malloc(n);
- if (!buf) {
- return (NULL);
- }
-
- localtime_r(&xtime, &t);
-
- // Convert "seconds west of GMT" to "hours/minutes offset"
- offset = t.tm_gmtoff;
- if (offset > 0) {
- offsign = '+';
- }
- else {
- offset = 0L - offset;
- offsign = '-';
- }
- offset = ((offset / 3600) * 100) + (offset % 60);
-
- snprintf(buf, n, "%s, %02d %s %04d %02d:%02d:%02d %c%04ld",
- httpdate_weekdays[t.tm_wday],
- t.tm_mday, httpdate_months[t.tm_mon], t.tm_year + 1900, t.tm_hour, t.tm_min, t.tm_sec, offsign, offset);
- return (buf);
-}