webcit/http_datestring.c

   1 /*
   2  * $Id$
   3  */
   4 /**
   5  * \defgroup HTTPDateTime Function to generate HTTP-compliant textual time/date stamp
   6  * (This module was lifted directly from the Citadel server source)
   7  *
   8  * \ingroup WebcitHttpServer
   9  */
  10 /*@{*/
  11 #include "webcit.h"
  12
  13 /** HTTP Months - do not translate - these are not for human consumption */
  14 static char *httpdate_months[] = {
  15         "Jan", "Feb", "Mar", "Apr", "May", "Jun",
  16         "Jul", "Aug", "Sep", "Oct", "Nov", "Dec"
  17 };
  18
  19 /** HTTP Weekdays - do not translate - these are not for human consumption */
  20 static char *httpdate_weekdays[] = {
  21         "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat"
  22 };
  23
  24
  25 /**
  26  * \brief Supplied with a unix timestamp, generate a textual time/date stamp
  27  * \param buf the return buffer
  28  * \param n the size of the buffer
  29  * \param xtime the time to format as string
  30  */
  31 void http_datestring(char *buf, size_t n, time_t xtime) {
  32         struct tm t;
  33
  34         long offset;
  35         char offsign;
  36
  37         localtime_r(&xtime, &t);
  38
  39         /** Convert "seconds west of GMT" to "hours/minutes offset" */
  40 #ifdef HAVE_STRUCT_TM_TM_GMTOFF
  41         offset = t.tm_gmtoff;
  42 #else
  43         offset = timezone;
  44 #endif
  45         if (offset > 0) {
  46                 offsign = '+';
  47         }
  48         else {
  49                 offset = 0L - offset;
  50                 offsign = '-';
  51         }
  52         offset = ( (offset / 3600) * 100 ) + ( offset % 60 );
  53
  54         snprintf(buf, n, "%s, %02d %s %04d %02d:%02d:%02d %c%04ld",
  55                 httpdate_weekdays[t.tm_wday],
  56                 t.tm_mday,
  57                 httpdate_months[t.tm_mon],
  58                 t.tm_year + 1900,
  59                 t.tm_hour,
  60                 t.tm_min,
  61                 t.tm_sec,
  62                 offsign, offset
  63         );
  64 }
  65
  66
  67 void tmplput_nowstr(StrBuf *Target, WCTemplputParams *TP)
  68 {
  69         time_t now;
  70         now = time(NULL);
  71         StrEscAppend(Target, NULL, asctime(localtime(&now)), 0, 0);
  72 }
  73 void tmplput_nowno(StrBuf *Target, WCTemplputParams *TP)
  74 {
  75         time_t now;
  76         now = time(NULL);
  77         StrBufAppendPrintf(Target, "%ld", now);
  78 }
  79
  80 void
  81 InitModule_DATE
  82 (void)
  83 {
  84         RegisterNamespace("DATE:NOW:STR", 0, 0, tmplput_nowstr, CTX_NONE);
  85         RegisterNamespace("DATE:NOW:NO", 0, 0, tmplput_nowno, CTX_NONE);
  86 }
  87
  88 /*@}*/