webcit/groupdav_put.c

   1 /*
   2  * $Id$
   3  *
   4  * Handles GroupDAV PUT 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_put(char *dav_pathname, char *dav_ifmatch,
  33                 char *supplied_content_type, char *dav_content
  34 ) {
  35         char dav_roomname[SIZ];
  36         char dav_uid[SIZ];
  37         char dav_content_type[SIZ];
  38         long new_msgnum = (-2L);
  39         long old_msgnum = (-1L);
  40         char buf[SIZ];
  41         int n = 0;
  42
  43         /* First, break off the "/groupdav/" prefix */
  44         remove_token(dav_pathname, 0, '/');
  45         remove_token(dav_pathname, 0, '/');
  46
  47         /* Now extract the message euid */
  48         n = num_tokens(dav_pathname, '/');
  49         extract_token(dav_uid, dav_pathname, n-1, '/');
  50         remove_token(dav_pathname, n-1, '/');
  51
  52         /* What's left is the room name.  Remove trailing slashes. */
  53         if (dav_pathname[strlen(dav_pathname)-1] == '/') {
  54                 dav_pathname[strlen(dav_pathname)-1] = 0;
  55         }
  56         strcpy(dav_roomname, dav_pathname);
  57
  58         /* Go to the correct room. */
  59         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  60                 gotoroom(dav_roomname);
  61         }
  62         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
  63                 wprintf("HTTP/1.1 404 not found\n");
  64                 groupdav_common_headers();
  65                 wprintf(
  66                         "Content-Type: text/plain\n"
  67                         "\n"
  68                         "There is no folder called \"%s\" on this server.\n",
  69                         dav_roomname
  70                 );
  71                 return;
  72         }
  73
  74         /* Ugly hack to mess with the content type.  KOrganizer is either
  75          * not supplying one, or supplying the wrong one.  FIXME remove this
  76          * after getting clarification or a fix from Reinhold.
  77          */
  78         strcpy(dav_content_type, supplied_content_type);
  79         switch (WC->wc_view) {
  80                 case VIEW_ADDRESSBOOK:
  81                         strcpy(dav_content_type, "text/x-vcard");
  82                         break;
  83                 case VIEW_CALENDAR:
  84                         strcpy(dav_content_type, "text/calendar");
  85                         break;
  86                 case VIEW_TASKS:
  87                         strcpy(dav_content_type, "text/calendar");
  88                         break;
  89                 default:
  90                         break;
  91         }
  92
  93         /*
  94          * If an HTTP If-Match: header is present, the client is attempting
  95          * to replace an existing item.  We have to check to see if the
  96          * message number associated with the supplied uid matches what the
  97          * client is expecting.  If not, the server probably contains a newer
  98          * version, so we fail...
  99          */
 100         if (strlen(dav_ifmatch) > 0) {
 101                 old_msgnum = locate_message_by_uid(dav_uid);
 102                 if (atol(dav_ifmatch) != old_msgnum) {
 103                         wprintf("HTTP/1.1 412 Precondition Failed\n");
 104                         groupdav_common_headers();
 105                         wprintf("Content-Length: 0\n\n");
 106                         return;
 107                 }
 108         }
 109
 110         /*
 111          * We are cleared for upload!  We use the new calling syntax for ENT0
 112          * which allows a confirmation to be sent back to us.  That's how we
 113          * extract the message ID.
 114          */
 115         serv_puts("ENT0 1|||4|||1|");
 116         serv_gets(buf);
 117         if (buf[0] != '8') {
 118                 wprintf("HTTP/1.1 502 Bad Gateway\n");
 119                 groupdav_common_headers();
 120                 wprintf("Content-type: text/plain\n"
 121                         "\n"
 122                         "%s\n", &buf[4]
 123                 );
 124                 return;
 125         }
 126
 127         /* Send the content to the Citadel server */
 128         serv_printf("Content-type: %s\n\n", dav_content_type);
 129         serv_puts(dav_content);
 130         serv_puts("\n000");
 131
 132         /* Fetch the reply from the Citadel server */
 133         n = 0;
 134         strcpy(dav_uid, "");
 135         while (serv_gets(buf), strcmp(buf, "000")) {
 136                 switch(n++) {
 137                         case 0:
 138                                 new_msgnum = atol(buf);
 139                                 break;
 140                         case 2:
 141                                 strcpy(dav_uid, buf);
 142                         default:
 143                                 break;
 144                 }
 145         }
 146
 147         /* Tell the client what happened. */
 148
 149         /* Citadel failed in some way? */
 150         if (new_msgnum < 0L) {
 151                 wprintf("HTTP/1.1 502 Bad Gateway\n");
 152                 groupdav_common_headers();
 153                 wprintf("Content-type: text/plain\n"
 154                         "\n"
 155                         "new_msgnum is %ld\n"
 156                         "\n", new_msgnum
 157                 );
 158                 return;
 159         }
 160
 161         /* We created this item for the first time. */
 162         if (old_msgnum < 0L) {
 163                 wprintf("HTTP/1.1 201 Created\n");
 164                 groupdav_common_headers();
 165                 wprintf("Content-Length: 0\n");
 166                 wprintf("Location: ");
 167                 if (strlen(WC->http_host) > 0) {
 168                         wprintf("%s://%s",
 169                                 (is_https ? "https" : "http"),
 170                                 WC->http_host);
 171                 }
 172                 wprintf("/groupdav/");
 173                 urlescputs(dav_roomname);
 174                 wprintf("/%s\n", dav_uid);
 175                 wprintf("\n");
 176                 return;
 177         }
 178
 179         /* We modified an existing item. */
 180         wprintf("HTTP/1.1 204 No Content\n");
 181         groupdav_common_headers();
 182         wprintf("Content-Length: 0\n\n");
 183
 184         /* The item we replaced has probably already been deleted by
 185          * the Citadel server, but we'll do this anyway, just in case.
 186          */
 187         serv_printf("DELE %ld", old_msgnum);
 188         serv_gets(buf);
 189
 190         return;
 191 }