webcit/groupdav_delete.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles GroupDAV DELETE requests.
   5  *
   6  */
   7
   8 #include "webcit.h"
   9 #include "webserver.h"
  10 #include "groupdav.h"
  11
  12
  13 /*
  14  * The pathname is always going to be /groupdav/room_name/euid
  15  */
  16 void groupdav_delete(char *dav_pathname, char *dav_ifmatch) {
  17         char dav_roomname[SIZ];
  18         char dav_uid[SIZ];
  19         long dav_msgnum = (-1);
  20         char buf[SIZ];
  21         int n = 0;
  22         int len;
  23
  24         /* First, break off the "/groupdav/" prefix */
  25         remove_token(dav_pathname, 0, '/');
  26         remove_token(dav_pathname, 0, '/');
  27
  28         /* Now extract the message euid */
  29         n = num_tokens(dav_pathname, '/');
  30         extract_token(dav_uid, dav_pathname, n-1, '/', sizeof dav_uid);
  31         remove_token(dav_pathname, n-1, '/');
  32
  33         /* What's left is the room name.  Remove trailing slashes. */
  34         len = strlen(dav_pathname);
  35         if (dav_pathname[len-1] == '/') {
  36                 dav_pathname[len-1] = 0;
  37         }
  38         strcpy(dav_roomname, dav_pathname);
  39
  40         /* Go to the correct room. */
  41         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  42                 gotoroom(dav_roomname);
  43         }
  44         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  45                 hprintf("HTTP/1.1 404 not found\r\n");
  46                 groupdav_common_headers();
  47                 hprintf("Content-Length: 0\r\n\r\n");
  48                 return;
  49         }
  50
  51         dav_msgnum = locate_message_by_uid(dav_uid);
  52
  53         /*
  54          * If no item exists with the requested uid ... simple error.
  55          */
  56         if (dav_msgnum < 0L) {
  57                 hprintf("HTTP/1.1 404 Not Found\r\n");
  58                 groupdav_common_headers();
  59                 hprintf("Content-Length: 0\r\n\r\n");
  60                 return;
  61         }
  62
  63         /*
  64          * It's there ... check the ETag and make sure it matches
  65          * the message number.
  66          */
  67         if (!IsEmptyStr(dav_ifmatch)) {
  68                 if (atol(dav_ifmatch) != dav_msgnum) {
  69                         hprintf("HTTP/1.1 412 Precondition Failed\r\n");
  70                         groupdav_common_headers();
  71                         hprintf("Content-Length: 0\r\n\r\n");
  72                         return;
  73                 }
  74         }
  75
  76         /*
  77          * Ok, attempt to delete the item.
  78          */
  79         serv_printf("DELE %ld", dav_msgnum);
  80         serv_getln(buf, sizeof buf);
  81         if (buf[0] == '2') {
  82                 hprintf("HTTP/1.1 204 No Content\r\n"); /* success */
  83                 groupdav_common_headers();
  84                 hprintf("Content-Length: 0\r\n\r\n");
  85         }
  86         else {
  87                 hprintf("HTTP/1.1 403 Forbidden\r\n");  /* access denied */
  88                 groupdav_common_headers();
  89                 hprintf("Content-Length: 0\r\n\r\n");
  90         }
  91         return;
  92 }