webcit-ng/room_functions.c

   1 /*
   2  * Room functions
   3  *
   4  * Copyright (c) 1996-2017 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "webcit.h"
  16
  17
  18 /*
  19  * Return a "zero-terminated" array of message numbers in the current room.
  20  * Caller owns the memory and must free it.  Returns NULL if any problems.
  21  */
  22 long *get_msglist(struct ctdlsession *c, char *which_msgs)
  23 {
  24         char buf[1024];
  25         long *msglist = NULL;
  26         int num_msgs = 0;
  27         int num_alloc = 0;
  28
  29         ctdl_printf(c, "MSGS %s", which_msgs);
  30         ctdl_readline(c, buf, sizeof(buf));
  31         if (buf[0] == '1') do
  32         {
  33                 if (num_msgs >= num_alloc) {
  34                         if (num_alloc == 0) {
  35                                 num_alloc = 1024;
  36                                 msglist = malloc(num_alloc * sizeof(long));
  37                         }
  38                         else {
  39                                 num_alloc *= 2;
  40                                 msglist = realloc(msglist, num_alloc * sizeof(long));
  41                         }
  42                 }
  43                 ctdl_readline(c, buf, sizeof(buf));
  44                 msglist[num_msgs++] = atol(buf);
  45         } while (strcmp(buf, "000"));                           // this makes the last element a "0" terminator
  46         return msglist;
  47 }
  48
  49
  50 /*
  51  * Supplied with a list of potential matches from an If-Match: or If-None-Match: header, and
  52  * a message number (which we always use as the entity tag in Citadel), return nonzero if the
  53  * message number matches any of the supplied tags in the string.
  54  */
  55 int match_etags(char *taglist, long msgnum)
  56 {
  57         int num_tags = num_tokens(taglist, ',');
  58         int i=0;
  59         char tag[1024];
  60
  61         if (msgnum <= 0) {                                      // no msgnum?  no match.
  62                 return(0);
  63         }
  64
  65         for (i=0; i<num_tags; ++i) {
  66                 extract_token(tag, taglist, i, ',', sizeof tag);
  67                 striplt(tag);
  68                 char *lq = (strchr(tag, '"'));
  69                 char *rq = (strrchr(tag, '"'));
  70                 if (lq < rq) {                                  // has two double quotes
  71                         strcpy(rq, "");
  72                         strcpy(tag, ++lq);
  73                 }
  74                 striplt(tag);
  75                 if (!strcmp(tag, "*")) {
  76                         return(1);                              // wildcard match
  77                 }
  78                 long tagmsgnum = atol(tag);
  79                 if ( (tagmsgnum > 0) && (tagmsgnum == msgnum) ) {       // match
  80                         return(1);
  81                 }
  82         }
  83
  84         return(0);                                              // no match
  85 }
  86
  87
  88 /*
  89  * Client is requesting a message list
  90  */
  91 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which)
  92 {
  93         int i = 0;
  94         long *msglist = get_msglist(c, which);
  95         JsonValue *j = NewJsonArray(HKEY("msgs"));
  96
  97         if (msglist != NULL) {
  98                 for (i=0; msglist[i]>0 ; ++i) {
  99                         JsonArrayAppend(j, NewJsonNumber( HKEY("m"), msglist[i]));
 100                 }
 101                 free(msglist);
 102         }
 103
 104         StrBuf *sj = NewStrBuf();
 105         SerializeJson(sj, j, 1);                        // '1' == free the source array
 106
 107         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 108         h->response_code = 200;
 109         h->response_string = strdup("OK");
 110         h->response_body_length = StrLength(sj);
 111         h->response_body = SmashStrBuf(&sj);
 112         return;
 113
 114
 115 }
 116
 117
 118 /*
 119  * Client requested an object in a room.
 120  */
 121 void object_in_room(struct http_transaction *h, struct ctdlsession *c)
 122 {
 123         char buf[1024];
 124         long msgnum = (-1);
 125         char unescaped_euid[1024];
 126
 127         extract_token(buf, h->uri, 4, '/', sizeof buf);
 128
 129         if (!strncasecmp(buf, "msgs.", 5)) {                    // Client is requesting a list of message numbers
 130                 json_msglist(h, c, &buf[5]);
 131                 return;
 132         }
 133
 134         if (!strncasecmp(buf, "threads", 5)) {                  // Client is requesting a threaded view (still kind of fuzzy here)
 135                 threaded_view(h, c, &buf[5]);
 136                 return;
 137         }
 138
 139         if (    (c->room_default_view == VIEW_CALENDAR)         // room types where objects are referenced by EUID
 140                 || (c->room_default_view == VIEW_TASKS)
 141                 || (c->room_default_view == VIEW_ADDRESSBOOK)
 142         ) {
 143                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 144                 unescape_input(unescaped_euid);
 145                 msgnum = locate_message_by_uid(c, unescaped_euid);
 146         }
 147         else {
 148                 msgnum = atol(buf);
 149         }
 150
 151         /*
 152          * All methods except PUT require the message to already exist
 153          */
 154         if ( (msgnum <= 0) && (strcasecmp(h->method, "PUT")) ) {
 155                 do_404(h);
 156         }
 157
 158         /*
 159          * If we get to this point we have a valid message number in an accessible room.
 160          */
 161         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 162
 163
 164         /*
 165          * Was the client actually requesting a specific component within the message?
 166          */
 167         if (num_tokens(h->uri, '/') == 6) {
 168                 extract_token(buf, h->uri, 5, '/', sizeof buf);
 169                 if (!IsEmptyStr(buf)) {
 170                         download_mime_component(h, c, msgnum, buf);
 171                         return;
 172                 }
 173         }
 174
 175         /*
 176          * Ok, we want a full message, but first let's check for the if[-none]-match headers.
 177          */
 178         char *if_match = header_val(h, "If-Match");
 179         if ( (if_match != NULL) && (!match_etags(if_match, msgnum)) ) {
 180                 do_412(h);
 181                 return;
 182         }
 183
 184         char *if_none_match = header_val(h, "If-None-Match");
 185         if ( (if_none_match != NULL) && (match_etags(if_none_match, msgnum)) ) {
 186                 do_412(h);
 187                 return;
 188         }
 189
 190         /*
 191          * DOOOOOO ITTTTT!!!
 192          */
 193
 194         if (!strcasecmp(h->method, "DELETE")) {
 195                 dav_delete_message(h, c, msgnum);
 196         }
 197         else if (!strcasecmp(h->method, "GET")) {
 198                 dav_get_message(h, c, msgnum);
 199         }
 200         else if (!strcasecmp(h->method, "PUT")) {
 201                 dav_put_message(h, c, unescaped_euid, msgnum);
 202         }
 203         else {
 204                 do_404(h);                                      // Got this far but the method made no sense?  Bummer.
 205         }
 206
 207 }
 208
 209
 210 /*
 211  * Called by the_room_itself() when the HTTP method is REPORT
 212  */
 213 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 214 {
 215         if (c->room_default_view == VIEW_CALENDAR) {
 216                 caldav_report(h, c);                            // CalDAV REPORTs ... fmgwac
 217                 return;
 218         }
 219
 220         do_404(h);      // future implementations like CardDAV will require code paths here
 221 }
 222
 223
 224 /*
 225  * Called by the_room_itself() when the HTTP method is OPTIONS
 226  */
 227 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 228 {
 229         h->response_code = 200;
 230         h->response_string = strdup("OK");
 231         if (c->room_default_view == VIEW_CALENDAR) {
 232                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 233         }
 234         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 235                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 236         }
 237         else {
 238                 add_response_header(h, strdup("DAV"), strdup("1"));                     // ordinary WebDAV for all other room types
 239         }
 240         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE"));
 241 }
 242
 243
 244 /*
 245  * Called by the_room_itself() when the HTTP method is PROPFIND
 246  */
 247 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 248 {
 249         char *e;
 250         long timestamp;
 251         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 252         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 253         StrBuf *Buf = NewStrBuf();
 254
 255         StrBufAppendPrintf(Buf, "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 256                 "<D:multistatus "
 257                         "xmlns:D=\"DAV:\" "
 258                         "xmlns:C=\"urn:ietf:params:xml:ns:caldav\""
 259                 ">"
 260         );
 261
 262         /* Transmit the collection resource */
 263         StrBufAppendPrintf(Buf, "<D:response>");
 264         StrBufAppendPrintf(Buf, "<D:href>");
 265         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 266         StrBufAppendPrintf(Buf, "/ctdl/r/");
 267         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 268         StrBufAppendPrintf(Buf, "</D:href>");
 269
 270         StrBufAppendPrintf(Buf, "<D:propstat>");
 271         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 272         StrBufAppendPrintf(Buf, "<D:prop>");
 273         StrBufAppendPrintf(Buf, "<D:displayname>");
 274         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 275         StrBufAppendPrintf(Buf, "</D:displayname>");
 276
 277         StrBufAppendPrintf(Buf, "<D:owner />");         // empty owner ought to be legal; see rfc3744 section 5.1
 278
 279         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 280         switch(c->room_default_view) {
 281                 case VIEW_CALENDAR:
 282                         StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 283                         break;
 284         }
 285         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 286
 287         int enumerate_by_euid = 0;                      // nonzero if messages will be retrieved by euid instead of msgnum
 288         switch(c->room_default_view) {
 289                 case VIEW_CALENDAR:                     // RFC4791 section 5.2
 290                         StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
 291                         StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 292                         StrBufAppendPrintf(Buf,         "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 293                         StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 294                         enumerate_by_euid = 1;
 295                         break;
 296                 case VIEW_TASKS:                        // RFC4791 section 5.2
 297                         StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 298                         StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 299                         StrBufAppendPrintf(Buf,         "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 300                         StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 301                         enumerate_by_euid = 1;
 302                         break;
 303                 case VIEW_ADDRESSBOOK:                  // FIXME put some sort of CardDAV crapola here when we implement it
 304                         enumerate_by_euid = 1;
 305                         break;
 306                 case VIEW_WIKI:                         // FIXME invent "WikiDAV" ?
 307                         enumerate_by_euid = 1;
 308                         break;
 309         }
 310
 311
 312         /* FIXME get the mtime
 313         StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 314         escputs(datestring);
 315         StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 316         */
 317
 318         StrBufAppendPrintf(Buf, "</D:prop>");
 319         StrBufAppendPrintf(Buf, "</D:propstat>");
 320         StrBufAppendPrintf(Buf, "</D:response>\n");
 321
 322         // If a depth greater than zero was specified, transmit the collection listing
 323         // BEGIN COLLECTION
 324         if (dav_depth > 0) {
 325                 long *msglist = get_msglist(c, "ALL");
 326                 if (msglist) {
 327                         int i;
 328                         for (i=0; (msglist[i] > 0); ++i) {
 329                                 if ((i%10) == 0) syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 330                                 e = NULL;       // EUID gets stored here
 331                                 timestamp = 0;
 332
 333                                 char cbuf[1024];
 334                                 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
 335                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 336                                 if (cbuf[0] == '1') while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 337                                         if ( (enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5)) ) {
 338                                                 // e = strdup(&cbuf[5]);
 339                                                 int elen = (2 * strlen(&cbuf[5]));
 340                                                 e = malloc(elen);
 341                                                 urlesc(e, elen, &cbuf[5]);
 342                                         }
 343                                         if (!strncasecmp(cbuf, "time=", 5)) {
 344                                                 timestamp = atol(&cbuf[5]);
 345                                         }
 346                                 }
 347                                 if (e == NULL) {
 348                                         e = malloc(20);
 349                                         sprintf(e, "%ld", msglist[i]);
 350                                 }
 351                                 StrBufAppendPrintf(Buf, "<D:response>");
 352
 353                                 // Generate the 'href' tag for this message
 354                                 StrBufAppendPrintf(Buf, "<D:href>");
 355                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 356                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 357                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 358                                 StrBufAppendPrintf(Buf, "/");
 359                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 360                                 StrBufAppendPrintf(Buf, "</D:href>");
 361                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 362                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 363                                 StrBufAppendPrintf(Buf, "<D:prop>");
 364
 365                                 switch(c->room_default_view) {
 366                                         case VIEW_CALENDAR:
 367                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 368                                                 break;
 369                                         case VIEW_TASKS:
 370                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 371                                                 break;
 372                                         case VIEW_ADDRESSBOOK:
 373                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 374                                                 break;
 375                                 }
 376
 377                                 if (timestamp > 0) {
 378                                         char *datestring = http_datestring(timestamp);
 379                                         if (datestring) {
 380                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 381                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 382                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 383                                                 free(datestring);
 384                                         }
 385                                         if (enumerate_by_euid) {                // FIXME ajc 2017oct30 should this really be inside the timestamp conditional?
 386                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
 387                                         }
 388                                 }
 389                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 390                                 free(e);
 391                         }
 392                         free(msglist);
 393                 };
 394         }
 395         // END COLLECTION
 396
 397         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 398
 399         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 400         h->response_code = 207;
 401         h->response_string = strdup("Multi-Status");
 402         h->response_body_length = StrLength(Buf);
 403         h->response_body = SmashStrBuf(&Buf);
 404 }
 405
 406 // some good examples here
 407 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 408
 409
 410 /*
 411  * Called by the_room_itself() when the HTTP method is PROPFIND
 412  */
 413 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 414 {
 415         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 416
 417         JsonObjectAppend(j, NewJsonPlainString( HKEY("name"),           c->room,                -1));
 418         JsonObjectAppend(j, NewJsonNumber(      HKEY("current_view"),   c->room_current_view    ));
 419         JsonObjectAppend(j, NewJsonNumber(      HKEY("default_view"),   c->room_default_view    ));
 420         JsonObjectAppend(j, NewJsonNumber(      HKEY("new_messages"),   c->new_messages         ));
 421         JsonObjectAppend(j, NewJsonNumber(      HKEY("total_messages"), c->total_messages       ));
 422
 423         StrBuf *sj = NewStrBuf();
 424         SerializeJson(sj, j, 1);                        // '1' == free the source array
 425
 426         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 427         h->response_code = 200;
 428         h->response_string = strdup("OK");
 429         h->response_body_length = StrLength(sj);
 430         h->response_body = SmashStrBuf(&sj);
 431         return;
 432 }
 433
 434
 435 /*
 436  * Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 437  * or /ctdl/r/roomname/ but *not* specific objects within the room)
 438  */
 439 void the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 440 {
 441         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 442
 443         if (!strcasecmp(h->method, "OPTIONS")) {
 444                 options_the_room_itself(h, c);
 445                 return;
 446         }
 447
 448         // PROPFIND method on the room itself could be looking for a directory
 449
 450         if (!strcasecmp(h->method, "PROPFIND")) {
 451                 propfind_the_room_itself(h, c);
 452                 return;
 453         }
 454
 455         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 456
 457         if (!strcasecmp(h->method, "REPORT")) {
 458                 report_the_room_itself(h, c);
 459                 return;
 460         }
 461
 462         // GET method on the room itself is an API call, possibly from our JavaScript front end
 463
 464         if (!strcasecmp(h->method, "get")) {
 465                 get_the_room_itself(h, c);
 466                 return;
 467         }
 468
 469         // we probably want a "go to this room" for interactive access
 470         do_404(h);
 471 }
 472
 473
 474 /*
 475  * Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 476  */
 477 void room_list(struct http_transaction *h, struct ctdlsession *c)
 478 {
 479         char buf[1024];
 480         char roomname[1024];
 481
 482         ctdl_printf(c, "LKRA");
 483         ctdl_readline(c, buf, sizeof(buf));
 484         if (buf[0] != '1') {
 485                 do_502(h);
 486                 return;
 487         }
 488
 489         JsonValue *j = NewJsonArray(HKEY("lkra"));
 490         while (ctdl_readline(c, buf, sizeof(buf)) , strcmp(buf, "000")) {
 491
 492                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 493                 JsonValue *jr = NewJsonObject(HKEY("room"));
 494
 495                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 496                 JsonObjectAppend(jr, NewJsonPlainString( HKEY("name"),  roomname, -1));
 497
 498                 int ra = extract_int(buf, 5);
 499                 JsonObjectAppend(jr, NewJsonBool( HKEY("known"), (ra && UA_KNOWN)));
 500                 JsonObjectAppend(jr, NewJsonBool( HKEY("hasnewmsgs"), (ra && UA_HASNEWMSGS)));
 501
 502                 int floor = extract_int(buf, 2);
 503                 JsonObjectAppend(jr, NewJsonNumber( HKEY("floor"), floor));
 504
 505                 int rorder = extract_int(buf, 3);
 506                 JsonObjectAppend(jr, NewJsonNumber( HKEY("rorder"), rorder));
 507
 508                 JsonArrayAppend(j, jr);                 // add the room to the array
 509         }
 510
 511         StrBuf *sj = NewStrBuf();
 512         SerializeJson(sj, j, 1);                        // '1' == free the source array
 513
 514         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 515         h->response_code = 200;
 516         h->response_string = strdup("OK");
 517         h->response_body_length = StrLength(sj);
 518         h->response_body = SmashStrBuf(&sj);
 519 }
 520
 521
 522 /*
 523  * Dispatcher for paths starting with /ctdl/r/
 524  */
 525 void ctdl_r(struct http_transaction *h, struct ctdlsession *c)
 526 {
 527         char requested_roomname[128];
 528         char buf[1024];
 529
 530         // All room-related functions require being "in" the room specified.  Are we in that room already?
 531         extract_token(requested_roomname, h->uri, 3, '/', sizeof requested_roomname);
 532         unescape_input(requested_roomname);
 533
 534         if (IsEmptyStr(requested_roomname)) {                   //      /ctdl/r/
 535                 room_list(h, c);
 536                 return;
 537         }
 538
 539         // If not, try to go there.
 540         if (strcasecmp(requested_roomname, c->room)) {
 541                 ctdl_printf(c, "GOTO %s", requested_roomname);
 542                 ctdl_readline(c, buf, sizeof(buf));
 543                 if (buf[0] == '2') {
 544                         // buf[3] will indicate whether any instant messages are waiting
 545                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 546                         c->new_messages = extract_int(&buf[4], 1);
 547                         c->total_messages = extract_int(&buf[4], 2);
 548                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 549                         //      4       (int)CCC->room.QRflags          Various flags associated with this room.
 550                         //      5       (long)CCC->room.QRhighest       The highest message number present in this room
 551                         //      6       (long)vbuf.v_lastseen           The highest message number the user has read in this room
 552                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 553                         //      8       (int)raideflag                  Nonzero if user is either Aide or a Room Aide in this room
 554                         //      9       (int)newmailcount               The number of new Mail messages the user has
 555                         //      10      (int)CCC->room.QRfloor          The floor number this room resides on
 556                         c->room_current_view = extract_int(&buf[4], 11);
 557                         c->room_default_view = extract_int(&buf[4], 12);
 558                         //      13      (int)is_trash                   Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 559                         //      14      (int)CCC->room.QRflags2         More flags associated with this room
 560                         //      15      (long)CCC->room.QRmtime         Timestamp of the last write activity in this room
 561                 }
 562                 else {
 563                         do_404(h);
 564                         return;
 565                 }
 566         }
 567
 568         // At this point our Citadel client session is "in" the specified room.
 569
 570         if (num_tokens(h->uri, '/') == 4) {                     //      /ctdl/r/roomname
 571                 the_room_itself(h, c);
 572                 return;
 573         }
 574
 575         extract_token(buf, h->uri, 4, '/', sizeof buf);
 576         if (num_tokens(h->uri, '/') == 5) {
 577                 if (IsEmptyStr(buf)) {
 578                         the_room_itself(h, c);                  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 579                 }
 580                 else {
 581                         object_in_room(h, c);                   //      /ctdl/r/roomname/object
 582                 }
 583                 return;
 584         }
 585         if (num_tokens(h->uri, '/') == 6) {
 586                 object_in_room(h, c);                           //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 587                 return;
 588         }
 589
 590         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 591         do_404(h);
 592 }