webcit/groupdav_propfind.c

   1 /*
   2  * $Id$
   3  */
   4 /**
   5  * \defgroup GroupdavPropfind Handles GroupDAV PROPFIND requests.
   6  *
   7  * A few notes about our XML output:
   8  *
   9  * --> Yes, we are spewing tags directly instead of using an XML library.
  10  *     If you would like to rewrite this using libxml2, code it up and submit
  11  *     a patch.  Whining will be summarily ignored.
  12  *
  13  * --> XML is deliberately output with no whitespace/newlines between tags.
  14  *     This makes it difficult to read, but we have discovered clients which
  15  *     crash when you try to pretty it up.
  16  *
  17  * \ingroup WebcitHttpServerGDav
  18  */
  19
  20 #include "webcit.h"
  21 #include "webserver.h"
  22 #include "groupdav.h"
  23
  24
  25 /**
  26  * \brief get all messages of this user
  27  * Given an encoded UID, translate that to an unencoded Citadel EUID and
  28  * then search for it in the current room.  Return a message number or -1
  29  * if not found.
  30  *
  31  * NOTE: this function relies on the Citadel server's brute-force search.
  32  * There's got to be a way to optimize this better.
  33  * \param uid the user to get the data for...
  34  */
  35 long locate_message_by_uid(char *uid) {
  36         char buf[SIZ];
  37         char decoded_uid[SIZ];
  38         long retval = (-1L);
  39
  40         /* Decode the uid */
  41         euid_unescapize(decoded_uid, uid);
  42
  43         serv_printf("EUID %s", decoded_uid);
  44         serv_getln(buf, sizeof buf);
  45         if (buf[0] == '2') {
  46                 retval = extract_long(&buf[4], 0);
  47         }
  48         return(retval);
  49 }
  50
  51
  52 /**
  53  * \brief List folders containing interesting groupware objects
  54  */
  55 void groupdav_folder_list(void) {
  56         char buf[SIZ];
  57         char roomname[SIZ];
  58         int view;
  59         char datestring[SIZ];
  60         time_t now;
  61
  62         now = time(NULL);
  63         http_datestring(datestring, sizeof datestring, now);
  64
  65         /**
  66          * Be rude.  Completely ignore the XML request and simply send them
  67          * everything we know about.  Let the client sort it out.
  68          */
  69         wprintf("HTTP/1.1 207 Multi-Status\r\n");
  70         groupdav_common_headers();
  71         wprintf("Date: %s\r\n", datestring);
  72         wprintf("Content-type: text/xml\r\n");
  73         wprintf("Content-encoding: identity\r\n");
  74
  75         begin_burst();
  76
  77         wprintf("<?xml version=\"1.0\" encoding=\"utf-8\"?>"
  78                 "<D:multistatus xmlns:D=\"DAV:\" xmlns:G=\"http://groupdav.org/\">"
  79         );
  80
  81         serv_puts("LKRA");
  82         serv_getln(buf, sizeof buf);
  83         if (buf[0] == '1') while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
  84
  85                 extract_token(roomname, buf, 0, '|', sizeof roomname);
  86                 view = extract_int(buf, 6);
  87
  88                 /**
  89                  * For now, only list rooms that we know a GroupDAV client
  90                  * might be interested in.  In the future we may add
  91                  * the rest.
  92                  */
  93                 if ((view == VIEW_CALENDAR)
  94                    || (view == VIEW_TASKS)
  95                    || (view == VIEW_ADDRESSBOOK) ) {
  96
  97                         wprintf("<D:response>");
  98
  99                         wprintf("<D:href>");
 100                         if (strlen(WC->http_host) > 0) {
 101                                 wprintf("%s://%s",
 102                                         (is_https ? "https" : "http"),
 103                                         WC->http_host);
 104                         }
 105                         wprintf("/groupdav/");
 106                         urlescputs(roomname);
 107                         wprintf("/</D:href>");
 108
 109                         wprintf("<D:propstat>");
 110                         wprintf("<D:status>HTTP/1.1 200 OK</D:status>");
 111                         wprintf("<D:prop>");
 112                         wprintf("<D:fullname>");
 113                         escputs(roomname);
 114                         wprintf("</D:fullname>");
 115                         wprintf("<D:resourcetype><D:collection/>");
 116
 117                         switch(view) {
 118                                 case VIEW_CALENDAR:
 119                                         wprintf("<G:vevent-collection />");
 120                                         break;
 121                                 case VIEW_TASKS:
 122                                         wprintf("<G:vtodo-collection />");
 123                                         break;
 124                                 case VIEW_ADDRESSBOOK:
 125                                         wprintf("<G:vcard-collection />");
 126                                         break;
 127                         }
 128
 129                         wprintf("</D:resourcetype>");
 130                         wprintf("</D:prop>");
 131                         wprintf("</D:propstat>");
 132                         wprintf("</D:response>");
 133                 }
 134         }
 135         wprintf("</D:multistatus>\n");
 136
 137         end_burst();
 138 }
 139
 140
 141
 142 /**
 143  * \brief Search though a davname
 144  * \param dav_pathname The pathname is always going to be /groupdav/room_name/msg_num
 145  */
 146 void groupdav_propfind(char *dav_pathname) {
 147         char dav_roomname[256];
 148         char dav_uid[256];
 149         char msgnum[256];
 150         long dav_msgnum = (-1);
 151         char buf[256];
 152         char uid[256];
 153         char encoded_uid[256];
 154         long *msgs = NULL;
 155         int num_msgs = 0;
 156         int i;
 157         char datestring[256];
 158         time_t now;
 159
 160         now = time(NULL);
 161         http_datestring(datestring, sizeof datestring, now);
 162
 163         extract_token(dav_roomname, dav_pathname, 2, '/', sizeof dav_roomname);
 164         extract_token(dav_uid, dav_pathname, 3, '/', sizeof dav_uid);
 165
 166         /*
 167         lprintf(9, "dav_pathname: %s\n", dav_pathname);
 168         lprintf(9, "dav_roomname: %s\n", dav_roomname);
 169         lprintf(9, "     dav_uid: %s\n", dav_uid);
 170         */
 171
 172         /**
 173          * If the room name is blank, the client is requesting a
 174          * folder list.
 175          */
 176         if (strlen(dav_roomname) == 0) {
 177                 groupdav_folder_list();
 178                 return;
 179         }
 180
 181         /* Go to the correct room. */
 182         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
 183                 gotoroom(dav_roomname);
 184         }
 185         if (strcasecmp(WC->wc_roomname, dav_roomname)) {
 186                 wprintf("HTTP/1.1 404 not found\r\n");
 187                 groupdav_common_headers();
 188                 wprintf("Date: %s\r\n", datestring);
 189                 wprintf(
 190                         "Content-Type: text/plain\r\n"
 191                         "\r\n"
 192                         "There is no folder called \"%s\" on this server.\r\n",
 193                         dav_roomname
 194                 );
 195                 return;
 196         }
 197
 198         /**
 199          * If dav_uid is non-empty, client is requesting a PROPFIND on
 200          * a specific item in the room.  This is not valid GroupDAV, but
 201          * we try to honor it anyway because some clients are expecting
 202          * it to work...
 203          */
 204         if (strlen(dav_uid) > 0) {
 205
 206                 dav_msgnum = locate_message_by_uid(dav_uid);
 207                 if (dav_msgnum < 0) {
 208                         wprintf("HTTP/1.1 404 not found\r\n");
 209                         groupdav_common_headers();
 210                         wprintf(
 211                                 "Content-Type: text/plain\r\n"
 212                                 "\r\n"
 213                                 "Object \"%s\" was not found in the \"%s\" folder.\r\n",
 214                                 dav_uid,
 215                                 dav_roomname
 216                         );
 217                         return;
 218                 }
 219
 220                 /**
 221                  * Be rude.  Completely ignore the XML request and simply send them
 222                  * everything we know about (which is going to simply be the ETag and
 223                  * nothing else).  Let the client-side parser sort it out.
 224                  */
 225                 wprintf("HTTP/1.1 207 Multi-Status\r\n");
 226                 groupdav_common_headers();
 227                 wprintf("Date: %s\r\n", datestring);
 228                 wprintf("Content-type: text/xml\r\n");
 229                 wprintf("Content-encoding: identity\r\n");
 230
 231                 begin_burst();
 232
 233                 wprintf("<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 234                         "<D:multistatus xmlns:D=\"DAV:\" xmlns:G=\"http://groupdav.org/\">"
 235                 );
 236
 237                 wprintf("<D:response>");
 238
 239                 wprintf("<D:href>");
 240                 if (strlen(WC->http_host) > 0) {
 241                         wprintf("%s://%s",
 242                                 (is_https ? "https" : "http"),
 243                                 WC->http_host);
 244                 }
 245                 wprintf("/groupdav/");
 246                 urlescputs(WC->wc_roomname);
 247                 euid_escapize(encoded_uid, dav_uid);
 248                 wprintf("/%s", encoded_uid);
 249                 wprintf("</D:href>");
 250                 wprintf("<D:propstat>");
 251                 wprintf("<D:status>HTTP/1.1 200 OK</D:status>");
 252                 wprintf("<D:prop><D:getetag>\"%ld\"</D:getetag></D:prop>", dav_msgnum);
 253                 wprintf("</D:propstat>");
 254
 255                 wprintf("</D:response>\n");
 256                 wprintf("</D:multistatus>\n");
 257                 end_burst();
 258                 return;
 259         }
 260
 261
 262         /**
 263          * We got to this point, which means that the client is requesting
 264          * a 'collection' (i.e. a list of all items in the room).
 265          *
 266          * Be rude.  Completely ignore the XML request and simply send them
 267          * everything we know about (which is going to simply be the ETag and
 268          * nothing else).  Let the client-side parser sort it out.
 269          */
 270         wprintf("HTTP/1.1 207 Multi-Status\r\n");
 271         groupdav_common_headers();
 272         wprintf("Date: %s\r\n", datestring);
 273         wprintf("Content-type: text/xml\r\n");
 274         wprintf("Content-encoding: identity\r\n");
 275
 276         begin_burst();
 277
 278         wprintf("<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 279                 "<D:multistatus xmlns:D=\"DAV:\" xmlns:G=\"http://groupdav.org/\">"
 280         );
 281
 282         serv_puts("MSGS ALL");
 283         serv_getln(buf, sizeof buf);
 284         if (buf[0] == '1') while (serv_getln(msgnum, sizeof msgnum), strcmp(msgnum, "000")) {
 285                 msgs = realloc(msgs, ++num_msgs * sizeof(long));
 286                 msgs[num_msgs-1] = atol(msgnum);
 287         }
 288
 289         if (num_msgs > 0) for (i=0; i<num_msgs; ++i) {
 290
 291                 strcpy(uid, "");
 292                 serv_printf("MSG0 %ld|3", msgs[i]);
 293                 serv_getln(buf, sizeof buf);
 294                 if (buf[0] == '1') while (serv_getln(buf, sizeof buf), strcmp(buf, "000")) {
 295                         if (!strncasecmp(buf, "exti=", 5)) {
 296                                 strcpy(uid, &buf[5]);
 297                         }
 298                 }
 299
 300                 if (strlen(uid) > 0) {
 301                         wprintf("<D:response>");
 302                         wprintf("<D:href>");
 303                         if (strlen(WC->http_host) > 0) {
 304                                 wprintf("%s://%s",
 305                                         (is_https ? "https" : "http"),
 306                                         WC->http_host);
 307                         }
 308                         wprintf("/groupdav/");
 309                         urlescputs(WC->wc_roomname);
 310                         euid_escapize(encoded_uid, uid);
 311                         wprintf("/%s", encoded_uid);
 312                         wprintf("</D:href>");
 313                         wprintf("<D:propstat>");
 314                         wprintf("<D:status>HTTP/1.1 200 OK</D:status>");
 315                         wprintf("<D:prop><D:getetag>\"%ld\"</D:getetag></D:prop>", msgs[i]);
 316                         wprintf("</D:propstat>");
 317                         wprintf("</D:response>");
 318                 }
 319         }
 320
 321         wprintf("</D:multistatus>\n");
 322         end_burst();
 323
 324         if (msgs != NULL) {
 325                 free(msgs);
 326         }
 327 }
 328
 329 /*@}*/