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