webcit/dav_delete.c

   1 /*
   2  * Handles GroupDAV DELETE requests.
   3  *
   4  * Copyright (c) 2005-2012 by the citadel.org team
   5  *
   6  * This program is open source software.  You can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License, version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "webcit.h"
  16 #include "webserver.h"
  17 #include "dav.h"
  18
  19
  20 /*
  21  * The pathname is always going to be /groupdav/room_name/euid
  22  */
  23 void dav_delete(void)
  24 {
  25         wcsession *WCC = WC;
  26         char dav_uid[SIZ];
  27         long dav_msgnum = (-1);
  28         char buf[SIZ];
  29         int n = 0;
  30         StrBuf *dav_roomname = NewStrBuf();
  31
  32         /* Now extract the message euid */
  33         n = StrBufNum_tokens(WCC->Hdr->HR.ReqLine, '/');
  34         extract_token(dav_uid, ChrPtr(WCC->Hdr->HR.ReqLine), n-1, '/', sizeof dav_uid);
  35         StrBufExtract_token(dav_roomname, WCC->Hdr->HR.ReqLine, 0, '/');
  36
  37         ///* What's left is the room name.  Remove trailing slashes. */
  38         //len = StrLength(WCC->Hdr->HR.ReqLine);
  39         //if ((len > 0) && (ChrPtr(WCC->Hdr->HR.ReqLinee)[len-1] == '/')) {
  40         //      StrBufCutRight(WCC->Hdr->HR.ReqLine, 1);
  41         //}
  42         //StrBufCutLeft(WCC->Hdr->HR.ReqLine, 1);
  43
  44         /* Go to the correct room. */
  45         if (strcasecmp(ChrPtr(WC->CurRoom.name), ChrPtr(dav_roomname))) {
  46                 gotoroom(dav_roomname);
  47         }
  48         if (strcasecmp(ChrPtr(WC->CurRoom.name), ChrPtr(dav_roomname))) {
  49                 hprintf("HTTP/1.1 404 not found\r\n");
  50                 dav_common_headers();
  51                 hprintf("Content-Length: 0\r\n\r\n");
  52                 begin_burst();
  53                 end_burst();
  54                 FreeStrBuf(&dav_roomname);
  55                 return;
  56         }
  57
  58         dav_msgnum = locate_message_by_uid(dav_uid);
  59
  60         /*
  61          * If no item exists with the requested uid ... simple error.
  62          */
  63         if (dav_msgnum < 0L) {
  64                 hprintf("HTTP/1.1 404 Not Found\r\n");
  65                 dav_common_headers();
  66                 hprintf("Content-Length: 0\r\n\r\n");
  67                 begin_burst();
  68                 end_burst();
  69                 FreeStrBuf(&dav_roomname);
  70                 return;
  71         }
  72
  73         /*
  74          * It's there ... check the ETag and make sure it matches
  75          * the message number.
  76          */
  77         if (StrLength(WCC->Hdr->HR.dav_ifmatch) > 0) {
  78                 if (StrTol(WCC->Hdr->HR.dav_ifmatch) != dav_msgnum) {
  79                         hprintf("HTTP/1.1 412 Precondition Failed\r\n");
  80                         dav_common_headers();
  81                         hprintf("Content-Length: 0\r\n\r\n");
  82                         begin_burst();
  83                         end_burst();
  84                         FreeStrBuf(&dav_roomname);
  85                         return;
  86                 }
  87         }
  88
  89         /*
  90          * Ok, attempt to delete the item.
  91          */
  92         serv_printf("DELE %ld", dav_msgnum);
  93         serv_getln(buf, sizeof buf);
  94         if (buf[0] == '2') {
  95                 hprintf("HTTP/1.1 204 No Content\r\n"); /* success */
  96                 dav_common_headers();
  97                 hprintf("Content-Length: 0\r\n\r\n");
  98                 begin_burst();
  99                 end_burst();
 100         }
 101         else {
 102                 hprintf("HTTP/1.1 403 Forbidden\r\n");  /* access denied */
 103                 dav_common_headers();
 104                 hprintf("Content-Length: 0\r\n\r\n");
 105                 begin_burst();
 106                 end_burst();
 107         }
 108         FreeStrBuf(&dav_roomname);
 109         return;
 110 }