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  *
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  *
  17  *
  18  *
  19  */
  20
  21 #include "webcit.h"
  22 #include "webserver.h"
  23 #include "dav.h"
  24
  25
  26 /*
  27  * The pathname is always going to be /groupdav/room_name/euid
  28  */
  29 void dav_delete(void)
  30 {
  31         wcsession *WCC = WC;
  32         char dav_uid[SIZ];
  33         long dav_msgnum = (-1);
  34         char buf[SIZ];
  35         int n = 0;
  36         StrBuf *dav_roomname = NewStrBuf();
  37
  38         /* Now extract the message euid */
  39         n = StrBufNum_tokens(WCC->Hdr->HR.ReqLine, '/');
  40         extract_token(dav_uid, ChrPtr(WCC->Hdr->HR.ReqLine), n-1, '/', sizeof dav_uid);
  41         StrBufExtract_token(dav_roomname, WCC->Hdr->HR.ReqLine, 0, '/');
  42
  43         ///* What's left is the room name.  Remove trailing slashes. */
  44         //len = StrLength(WCC->Hdr->HR.ReqLine);
  45         //if ((len > 0) && (ChrPtr(WCC->Hdr->HR.ReqLinee)[len-1] == '/')) {
  46         //      StrBufCutRight(WCC->Hdr->HR.ReqLine, 1);
  47         //}
  48         //StrBufCutLeft(WCC->Hdr->HR.ReqLine, 1);
  49
  50         /* Go to the correct room. */
  51         if (strcasecmp(ChrPtr(WC->CurRoom.name), ChrPtr(dav_roomname))) {
  52                 gotoroom(dav_roomname);
  53         }
  54         if (strcasecmp(ChrPtr(WC->CurRoom.name), ChrPtr(dav_roomname))) {
  55                 hprintf("HTTP/1.1 404 not found\r\n");
  56                 dav_common_headers();
  57                 hprintf("Content-Length: 0\r\n\r\n");
  58                 begin_burst();
  59                 end_burst();
  60                 FreeStrBuf(&dav_roomname);
  61                 return;
  62         }
  63
  64         dav_msgnum = locate_message_by_uid(dav_uid);
  65
  66         /*
  67          * If no item exists with the requested uid ... simple error.
  68          */
  69         if (dav_msgnum < 0L) {
  70                 hprintf("HTTP/1.1 404 Not Found\r\n");
  71                 dav_common_headers();
  72                 hprintf("Content-Length: 0\r\n\r\n");
  73                 begin_burst();
  74                 end_burst();
  75                 FreeStrBuf(&dav_roomname);
  76                 return;
  77         }
  78
  79         /*
  80          * It's there ... check the ETag and make sure it matches
  81          * the message number.
  82          */
  83         if (StrLength(WCC->Hdr->HR.dav_ifmatch) > 0) {
  84                 if (StrTol(WCC->Hdr->HR.dav_ifmatch) != dav_msgnum) {
  85                         hprintf("HTTP/1.1 412 Precondition Failed\r\n");
  86                         dav_common_headers();
  87                         hprintf("Content-Length: 0\r\n\r\n");
  88                         begin_burst();
  89                         end_burst();
  90                         FreeStrBuf(&dav_roomname);
  91                         return;
  92                 }
  93         }
  94
  95         /*
  96          * Ok, attempt to delete the item.
  97          */
  98         serv_printf("DELE %ld", dav_msgnum);
  99         serv_getln(buf, sizeof buf);
 100         if (buf[0] == '2') {
 101                 hprintf("HTTP/1.1 204 No Content\r\n"); /* success */
 102                 dav_common_headers();
 103                 hprintf("Content-Length: 0\r\n\r\n");
 104                 begin_burst();
 105                 end_burst();
 106         }
 107         else {
 108                 hprintf("HTTP/1.1 403 Forbidden\r\n");  /* access denied */
 109                 dav_common_headers();
 110                 hprintf("Content-Length: 0\r\n\r\n");
 111                 begin_burst();
 112                 end_burst();
 113         }
 114         FreeStrBuf(&dav_roomname);
 115         return;
 116 }