webcit/groupdav_delete.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles GroupDAV DELETE requests.
   5  *
   6  */
   7
   8 #include <ctype.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/wait.h>
  16 #include <sys/socket.h>
  17 #include <limits.h>
  18 #include <string.h>
  19 #include <pwd.h>
  20 #include <errno.h>
  21 #include <stdarg.h>
  22 #include <time.h>
  23 #include <pthread.h>
  24 #include "webcit.h"
  25 #include "webserver.h"
  26 #include "groupdav.h"
  27
  28
  29 /*
  30  * The pathname is always going to be /groupdav/room_name/euid
  31  */
  32 void groupdav_delete(char *dav_pathname, char *dav_ifmatch) {
  33         char dav_roomname[SIZ];
  34         char dav_uid[SIZ];
  35         long dav_msgnum = (-1);
  36         char buf[SIZ];
  37         int n = 0;
  38
  39         /* First, break off the "/groupdav/" prefix */
  40         remove_token(dav_pathname, 0, '/');
  41         remove_token(dav_pathname, 0, '/');
  42
  43         /* Now extract the message euid */
  44         n = num_tokens(dav_pathname, '/');
  45         extract_token(dav_uid, dav_pathname, n-1, '/', sizeof dav_uid);
  46         remove_token(dav_pathname, n-1, '/');
  47
  48         /* What's left is the room name.  Remove trailing slashes. */
  49         if (dav_pathname[strlen(dav_pathname)-1] == '/') {
  50                 dav_pathname[strlen(dav_pathname)-1] = 0;
  51         }
  52         strcpy(dav_roomname, dav_pathname);
  53
  54         /* Go to the correct room. */
  55         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  56                 gotoroom(dav_roomname);
  57         }
  58         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  59                 wprintf("HTTP/1.1 404 not found\r\n");
  60                 groupdav_common_headers();
  61                 wprintf("Content-Length: 0\r\n\r\n");
  62                 return;
  63         }
  64
  65         dav_msgnum = locate_message_by_uid(dav_uid);
  66
  67         /*
  68          * If no item exists with the requested uid ... simple error.
  69          */
  70         if (dav_msgnum < 0L) {
  71                 wprintf("HTTP/1.1 404 Not Found\r\n");
  72                 groupdav_common_headers();
  73                 wprintf("Content-Length: 0\r\n\r\n");
  74                 return;
  75         }
  76
  77         /*
  78          * It's there ... check the ETag and make sure it matches
  79          * the message number.
  80          */
  81         if (strlen(dav_ifmatch) > 0) {
  82                 if (atol(dav_ifmatch) != dav_msgnum) {
  83                         wprintf("HTTP/1.1 412 Precondition Failed\r\n");
  84                         groupdav_common_headers();
  85                         wprintf("Content-Length: 0\r\n\r\n");
  86                         return;
  87                 }
  88         }
  89
  90         /*
  91          * Ok, attempt to delete the item.
  92          */
  93         serv_printf("DELE %ld", dav_msgnum);
  94         serv_gets(buf);
  95         if (buf[0] == '2') {
  96                 wprintf("HTTP/1.1 204 No Content\r\n"); /* success */
  97                 groupdav_common_headers();
  98                 wprintf("Content-Length: 0\r\n\r\n");
  99         }
 100         else {
 101                 wprintf("HTTP/1.1 403 Forbidden\r\n");  /* access denied */
 102                 groupdav_common_headers();
 103                 wprintf("Content-Length: 0\r\n\r\n");
 104         }
 105         return;
 106 }