[apr-util] New (evil) date format for apr_date_parse_rfc()

[Dmitri Tikhonov <dm...@netilla.com>]

Enclosed is a patch against APR 0.9.4 that would parse a date string I saw
produced by Netscape-Enterprise/4.1 server (it could be the web
application, however). This might not be the best solution, because I had
to copy and lower-case the month string for the date to parse.  I couldn't
find this format in any RFC, so maybe this function is even a wrong place
for it.

  - Dmitri.


--- apr_date.c	2003/04/10 19:16:14	1.5
+++ apr_date.c	2003/07/31 19:42:28
@@ -342,6 +342,8 @@
  *     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
+ *     THU 7-AUG-2003 16:16:19 GMT    ; Upper-case month
+ *     THU 17-AUG-2003 16:16:19 GMT   ; Upper-case month
  *
  */

@@ -362,7 +364,9 @@
 {
     apr_time_exp_t ds;
     apr_time_t result;
-    int mint, mon;
+    int mint, mon, i;
+    /* Buffer in case we need to lower-case month */
+    char mbuf[3];
     const char *monstr, *timstr, *gmtstr;
     static const int months[12] =
     {
@@ -390,7 +394,7 @@

         ++date;    /* Now pointing to first char after space, which should be */    }

-    /* start of the actual date information for all 11 formats. */
+    /* start of the actual date information for all 14 formats. */
     if (apr_date_checkmask(date, "## @$$ #### ##:##:## *")) {   /* RFC 1123 format */
         ds.tm_year = ((date[7] - '0') * 10 + (date[8] - '0') - 19) * 100;

@@ -580,6 +584,50 @@
         ds.tm_mday = ((date[0] - '0') * 10) + (date[1] - '0');

         monstr = date + 3;
+        timstr = date + 12;
+        gmtstr = date + 21;
+
+        TIMEPARSE_STD(ds, timstr);
+    }
+    else if (apr_date_checkmask(date, "#-@@@-#### ##:##:## *")) {
+       /* Seen on the web: THU 7-AUG-2003 16:16:19 GMT */
+        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';
+
+        for (i = 0; i < 3; ++i) {
+            mbuf[i] = date[2 + i];
+            if (i)
+                mbuf[i] = apr_tolower(mbuf[i]);
+        }
+
+        monstr = mbuf;
+        timstr = date + 11;
+        gmtstr = date + 20;
+
+        TIMEPARSE_STD(ds, timstr);
+    }
+    else if (apr_date_checkmask(date, "##-@@@-#### ##:##:## *")) {
+       /* Seen on the web: THU 7-AUG-2003 16:16:19 GMT */
+        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');
+
+        for (i = 0; i < 3; ++i) {
+            mbuf[i] = date[3 + i];
+            if (i)
+                mbuf[i] = apr_tolower(mbuf[i]);
+        }
+
+        monstr = mbuf;
         timstr = date + 12;
         gmtstr = date + 21;