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\r\n");
  64                 groupdav_common_headers();
  65                 wprintf(
  66                         "Content-Type: text/plain\r\n"
  67                         "\r\n"
  68                         "There is no folder called \"%s\" on this server.\r\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.
  76          * FIXME - remove this after KOrg gets fixed.
  77          */
  78         strcpy(dav_content_type, supplied_content_type);
  79         /* lprintf(9, "Supplied content type: %s\n", dav_content_type); */
  80         switch (WC->wc_view) {
  81                 case VIEW_ADDRESSBOOK:
  82                         strcpy(dav_content_type, "text/x-vcard");
  83                         break;
  84                 case VIEW_CALENDAR:
  85                         strcpy(dav_content_type, "text/calendar");
  86                         break;
  87                 case VIEW_TASKS:
  88                         strcpy(dav_content_type, "text/calendar");
  89                         break;
  90                 default:
  91                         break;
  92         }
  93         /* lprintf(9, "  Forced content type: %s\n", dav_content_type); */
  94
  95         /*
  96          * If an HTTP If-Match: header is present, the client is attempting
  97          * to replace an existing item.  We have to check to see if the
  98          * message number associated with the supplied uid matches what the
  99          * client is expecting.  If not, the server probably contains a newer
 100          * version, so we fail...
 101          */
 102         if (strlen(dav_ifmatch) > 0) {
 103                 lprintf(9, "dav_ifmatch: %s\n", dav_ifmatch);
 104                 old_msgnum = locate_message_by_uid(dav_uid);
 105                 lprintf(9, "old_msgnum:  %ld\n", old_msgnum);
 106                 if (atol(dav_ifmatch) != old_msgnum) {
 107                         wprintf("HTTP/1.1 412 Precondition Failed\r\n");
 108                         lprintf(9, "HTTP/1.1 412 Precondition Failed\r\n");
 109                         groupdav_common_headers();
 110                         wprintf("Content-Length: 0\r\n\r\n");
 111                         return;
 112                 }
 113         }
 114
 115         /*
 116          * We are cleared for upload!  We use the new calling syntax for ENT0
 117          * which allows a confirmation to be sent back to us.  That's how we
 118          * extract the message ID.
 119          */
 120         serv_puts("ENT0 1|||4|||1|");
 121         serv_gets(buf);
 122         if (buf[0] != '8') {
 123                 wprintf("HTTP/1.1 502 Bad Gateway\r\n");
 124                 groupdav_common_headers();
 125                 wprintf("Content-type: text/plain\r\n"
 126                         "\r\n"
 127                         "%s\r\n", &buf[4]
 128                 );
 129                 return;
 130         }
 131
 132         /* Send the content to the Citadel server */
 133         serv_printf("Content-type: %s\n\n", dav_content_type);
 134         serv_puts(dav_content);
 135         serv_puts("\n000");
 136
 137         /* Fetch the reply from the Citadel server */
 138         n = 0;
 139         strcpy(dav_uid, "");
 140         while (serv_gets(buf), strcmp(buf, "000")) {
 141                 switch(n++) {
 142                         case 0: new_msgnum = atol(buf);
 143                                 break;
 144                         case 1: lprintf(9, "new_msgnum=%ld (%s)\n", new_msgnum, buf);
 145                                 break;
 146                         case 2: strcpy(dav_uid, buf);
 147                                 break;
 148                         default:
 149                                 break;
 150                 }
 151         }
 152
 153         /* Tell the client what happened. */
 154
 155         /* Citadel failed in some way? */
 156         if (new_msgnum < 0L) {
 157                 wprintf("HTTP/1.1 502 Bad Gateway\r\n");
 158                 groupdav_common_headers();
 159                 wprintf("Content-type: text/plain\r\n"
 160                         "\r\n"
 161                         "new_msgnum is %ld\r\n"
 162                         "\r\n", new_msgnum
 163                 );
 164                 return;
 165         }
 166
 167         /* We created this item for the first time. */
 168         if (old_msgnum < 0L) {
 169                 wprintf("HTTP/1.1 201 Created\r\n");
 170                 lprintf(9, "HTTP/1.1 201 Created\r\n");
 171                 groupdav_common_headers();
 172                 wprintf("Content-Length: 0\r\n");
 173                 wprintf("Location: ");
 174                 if (strlen(WC->http_host) > 0) {
 175                         wprintf("%s://%s",
 176                                 (is_https ? "https" : "http"),
 177                                 WC->http_host);
 178                 }
 179                 wprintf("/groupdav/");
 180                 urlescputs(dav_roomname);
 181                 wprintf("/%s\r\n", dav_uid);
 182                 wprintf("\r\n");
 183                 return;
 184         }
 185
 186         /* We modified an existing item. */
 187         wprintf("HTTP/1.1 204 No Content\r\n");
 188         lprintf(9, "HTTP/1.1 204 No Content\r\n");
 189         groupdav_common_headers();
 190         wprintf("Content-Length: 0\r\n\r\n");
 191
 192         /* The item we replaced has probably already been deleted by
 193          * the Citadel server, but we'll do this anyway, just in case.
 194          */
 195         serv_printf("DELE %ld", old_msgnum);
 196         serv_gets(buf);
 197
 198         return;
 199 }