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 found_content_type = 0;
  38         int n = 0;
  39
  40         /* First, break off the "/groupdav/" prefix */
  41         remove_token(dav_pathname, 0, '/');
  42         remove_token(dav_pathname, 0, '/');
  43
  44         /* Now extract the message euid */
  45         n = num_tokens(dav_pathname, '/');
  46         extract_token(dav_uid, dav_pathname, n-1, '/');
  47         remove_token(dav_pathname, n-1, '/');
  48
  49         /* What's left is the room name.  Remove trailing slashes. */
  50         if (dav_pathname[strlen(dav_pathname)-1] == '/') {
  51                 dav_pathname[strlen(dav_pathname)-1] = 0;
  52         }
  53         strcpy(dav_roomname, dav_pathname);
  54
  55         /* Go to the correct room. */
  56         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  57                 gotoroom(dav_roomname);
  58         }
  59         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  60                 wprintf("HTTP/1.1 404 not found\n");
  61                 groupdav_common_headers();
  62                 wprintf("Content-Length: 0\n\n");
  63                 return;
  64         }
  65
  66         dav_msgnum = locate_message_by_uid(dav_uid);
  67
  68         /*
  69          * If no item exists with the requested uid ... simple error.
  70          */
  71         if (dav_msgnum < 0L) {
  72                 wprintf("HTTP/1.1 404 Not Found\n");
  73                 groupdav_common_headers();
  74                 wprintf("Content-Length: 0\n\n");
  75                 return;
  76         }
  77
  78         /*
  79          * It's there ... check the ETag and make sure it matches
  80          * the message number.
  81          */
  82         if (strlen(dav_ifmatch) > 0) {
  83                 if (atol(dav_ifmatch) != dav_msgnum) {
  84                         wprintf("HTTP/1.1 412 Precondition Failed\n");
  85                         groupdav_common_headers();
  86                         wprintf("Content-Length: 0\n\n");
  87                         return;
  88                 }
  89         }
  90
  91         /*
  92          * Ok, attempt to delete the item.
  93          */
  94         serv_printf("DELE %ld", dav_msgnum);
  95         serv_gets(buf);
  96         if (buf[0] == '2') {
  97                 wprintf("HTTP/1.1 204 No Content\n");   /* success */
  98                 groupdav_common_headers();
  99                 wprintf("Content-Length: 0\n\n");
 100         }
 101         else {
 102                 wprintf("HTTP/1.1 403 Forbidden\n");    /* access denied */
 103                 groupdav_common_headers();
 104                 wprintf("Content-Length: 0\n\n");
 105         }
 106         return;
 107 }