webcit-ng/room_functions.c

   1 /*
   2  * Room functions
   3  *
   4  * Copyright (c) 1996-2018 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 (!strncasecmp(buf, "flat", 5)) {                     // Client is requesting a flat view (still kind of fuzzy here)
 140                 flat_view(h, c, &buf[5]);
 141                 return;
 142         }
 143
 144         if (    (c->room_default_view == VIEW_CALENDAR)         // room types where objects are referenced by EUID
 145                 || (c->room_default_view == VIEW_TASKS)
 146                 || (c->room_default_view == VIEW_ADDRESSBOOK)
 147         ) {
 148                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 149                 unescape_input(unescaped_euid);
 150                 msgnum = locate_message_by_uid(c, unescaped_euid);
 151         }
 152         else {
 153                 msgnum = atol(buf);
 154         }
 155
 156         /*
 157          * All methods except PUT require the message to already exist
 158          */
 159         if ( (msgnum <= 0) && (strcasecmp(h->method, "PUT")) ) {
 160                 do_404(h);
 161         }
 162
 163         /*
 164          * If we get to this point we have a valid message number in an accessible room.
 165          */
 166         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 167
 168
 169         /*
 170          * Was the client actually requesting a specific component within the message?
 171          */
 172         if (num_tokens(h->uri, '/') == 6) {
 173                 extract_token(buf, h->uri, 5, '/', sizeof buf);
 174                 if (!IsEmptyStr(buf)) {
 175                         download_mime_component(h, c, msgnum, buf);
 176                         return;
 177                 }
 178         }
 179
 180         /*
 181          * Ok, we want a full message, but first let's check for the if[-none]-match headers.
 182          */
 183         char *if_match = header_val(h, "If-Match");
 184         if ( (if_match != NULL) && (!match_etags(if_match, msgnum)) ) {
 185                 do_412(h);
 186                 return;
 187         }
 188
 189         char *if_none_match = header_val(h, "If-None-Match");
 190         if ( (if_none_match != NULL) && (match_etags(if_none_match, msgnum)) ) {
 191                 do_412(h);
 192                 return;
 193         }
 194
 195         /*
 196          * DOOOOOO ITTTTT!!!
 197          */
 198
 199         if (!strcasecmp(h->method, "DELETE")) {
 200                 dav_delete_message(h, c, msgnum);
 201         }
 202         else if (!strcasecmp(h->method, "GET")) {
 203                 dav_get_message(h, c, msgnum);
 204         }
 205         else if (!strcasecmp(h->method, "PUT")) {
 206                 dav_put_message(h, c, unescaped_euid, msgnum);
 207         }
 208         else {
 209                 do_404(h);                                      // Got this far but the method made no sense?  Bummer.
 210         }
 211
 212 }
 213
 214
 215 /*
 216  * Called by the_room_itself() when the HTTP method is REPORT
 217  */
 218 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 219 {
 220         if (c->room_default_view == VIEW_CALENDAR) {
 221                 caldav_report(h, c);                            // CalDAV REPORTs ... fmgwac
 222                 return;
 223         }
 224
 225         do_404(h);      // future implementations like CardDAV will require code paths here
 226 }
 227
 228
 229 /*
 230  * Called by the_room_itself() when the HTTP method is OPTIONS
 231  */
 232 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 233 {
 234         h->response_code = 200;
 235         h->response_string = strdup("OK");
 236         if (c->room_default_view == VIEW_CALENDAR) {
 237                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 238         }
 239         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 240                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 241         }
 242         else {
 243                 add_response_header(h, strdup("DAV"), strdup("1"));                     // ordinary WebDAV for all other room types
 244         }
 245         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE"));
 246 }
 247
 248
 249 /*
 250  * Called by the_room_itself() when the HTTP method is PROPFIND
 251  */
 252 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 253 {
 254         char *e;
 255         long timestamp;
 256         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 257         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 258         StrBuf *Buf = NewStrBuf();
 259
 260         StrBufAppendPrintf(Buf, "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 261                 "<D:multistatus "
 262                         "xmlns:D=\"DAV:\" "
 263                         "xmlns:C=\"urn:ietf:params:xml:ns:caldav\""
 264                 ">"
 265         );
 266
 267         /* Transmit the collection resource */
 268         StrBufAppendPrintf(Buf, "<D:response>");
 269         StrBufAppendPrintf(Buf, "<D:href>");
 270         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 271         StrBufAppendPrintf(Buf, "/ctdl/r/");
 272         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 273         StrBufAppendPrintf(Buf, "</D:href>");
 274
 275         StrBufAppendPrintf(Buf, "<D:propstat>");
 276         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 277         StrBufAppendPrintf(Buf, "<D:prop>");
 278         StrBufAppendPrintf(Buf, "<D:displayname>");
 279         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 280         StrBufAppendPrintf(Buf, "</D:displayname>");
 281
 282         StrBufAppendPrintf(Buf, "<D:owner />");         // empty owner ought to be legal; see rfc3744 section 5.1
 283
 284         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 285         switch(c->room_default_view) {
 286                 case VIEW_CALENDAR:
 287                         StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 288                         break;
 289         }
 290         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 291
 292         int enumerate_by_euid = 0;                      // nonzero if messages will be retrieved by euid instead of msgnum
 293         switch(c->room_default_view) {
 294                 case VIEW_CALENDAR:                     // RFC4791 section 5.2
 295                         StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
 296                         StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 297                         StrBufAppendPrintf(Buf,         "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 298                         StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 299                         enumerate_by_euid = 1;
 300                         break;
 301                 case VIEW_TASKS:                        // RFC4791 section 5.2
 302                         StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 303                         StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 304                         StrBufAppendPrintf(Buf,         "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 305                         StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 306                         enumerate_by_euid = 1;
 307                         break;
 308                 case VIEW_ADDRESSBOOK:                  // FIXME put some sort of CardDAV crapola here when we implement it
 309                         enumerate_by_euid = 1;
 310                         break;
 311                 case VIEW_WIKI:                         // FIXME invent "WikiDAV" ?
 312                         enumerate_by_euid = 1;
 313                         break;
 314         }
 315
 316
 317         /* FIXME get the mtime
 318         StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 319         escputs(datestring);
 320         StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 321         */
 322
 323         StrBufAppendPrintf(Buf, "</D:prop>");
 324         StrBufAppendPrintf(Buf, "</D:propstat>");
 325         StrBufAppendPrintf(Buf, "</D:response>\n");
 326
 327         // If a depth greater than zero was specified, transmit the collection listing
 328         // BEGIN COLLECTION
 329         if (dav_depth > 0) {
 330                 long *msglist = get_msglist(c, "ALL");
 331                 if (msglist) {
 332                         int i;
 333                         for (i=0; (msglist[i] > 0); ++i) {
 334                                 if ((i%10) == 0) syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 335                                 e = NULL;       // EUID gets stored here
 336                                 timestamp = 0;
 337
 338                                 char cbuf[1024];
 339                                 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
 340                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 341                                 if (cbuf[0] == '1') while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 342                                         if ( (enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5)) ) {
 343                                                 // e = strdup(&cbuf[5]);
 344                                                 int elen = (2 * strlen(&cbuf[5]));
 345                                                 e = malloc(elen);
 346                                                 urlesc(e, elen, &cbuf[5]);
 347                                         }
 348                                         if (!strncasecmp(cbuf, "time=", 5)) {
 349                                                 timestamp = atol(&cbuf[5]);
 350                                         }
 351                                 }
 352                                 if (e == NULL) {
 353                                         e = malloc(20);
 354                                         sprintf(e, "%ld", msglist[i]);
 355                                 }
 356                                 StrBufAppendPrintf(Buf, "<D:response>");
 357
 358                                 // Generate the 'href' tag for this message
 359                                 StrBufAppendPrintf(Buf, "<D:href>");
 360                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 361                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 362                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 363                                 StrBufAppendPrintf(Buf, "/");
 364                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 365                                 StrBufAppendPrintf(Buf, "</D:href>");
 366                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 367                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 368                                 StrBufAppendPrintf(Buf, "<D:prop>");
 369
 370                                 switch(c->room_default_view) {
 371                                         case VIEW_CALENDAR:
 372                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 373                                                 break;
 374                                         case VIEW_TASKS:
 375                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 376                                                 break;
 377                                         case VIEW_ADDRESSBOOK:
 378                                                 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 379                                                 break;
 380                                 }
 381
 382                                 if (timestamp > 0) {
 383                                         char *datestring = http_datestring(timestamp);
 384                                         if (datestring) {
 385                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 386                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 387                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 388                                                 free(datestring);
 389                                         }
 390                                         if (enumerate_by_euid) {                // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
 391                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
 392                                         }
 393                                 }
 394                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 395                                 free(e);
 396                         }
 397                         free(msglist);
 398                 };
 399         }
 400         // END COLLECTION
 401
 402         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 403
 404         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 405         h->response_code = 207;
 406         h->response_string = strdup("Multi-Status");
 407         h->response_body_length = StrLength(Buf);
 408         h->response_body = SmashStrBuf(&Buf);
 409 }
 410
 411 // some good examples here
 412 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 413
 414
 415 /*
 416  * Called by the_room_itself() when the HTTP method is PROPFIND
 417  */
 418 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 419 {
 420         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 421
 422         JsonObjectAppend(j, NewJsonPlainString( HKEY("name"),           c->room,                -1));
 423         JsonObjectAppend(j, NewJsonNumber(      HKEY("current_view"),   c->room_current_view    ));
 424         JsonObjectAppend(j, NewJsonNumber(      HKEY("default_view"),   c->room_default_view    ));
 425         JsonObjectAppend(j, NewJsonNumber(      HKEY("new_messages"),   c->new_messages         ));
 426         JsonObjectAppend(j, NewJsonNumber(      HKEY("total_messages"), c->total_messages       ));
 427         JsonObjectAppend(j, NewJsonNumber(      HKEY("last_seen"),      c->last_seen            ));
 428
 429         StrBuf *sj = NewStrBuf();
 430         SerializeJson(sj, j, 1);                        // '1' == free the source array
 431
 432         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 433         h->response_code = 200;
 434         h->response_string = strdup("OK");
 435         h->response_body_length = StrLength(sj);
 436         h->response_body = SmashStrBuf(&sj);
 437         return;
 438 }
 439
 440
 441 /*
 442  * Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 443  * or /ctdl/r/roomname/ but *not* specific objects within the room)
 444  */
 445 void the_room_itself(struct http_transaction *h, struct ctdlsession *c)
 446 {
 447         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 448
 449         if (!strcasecmp(h->method, "OPTIONS")) {
 450                 options_the_room_itself(h, c);
 451                 return;
 452         }
 453
 454         // PROPFIND method on the room itself could be looking for a directory
 455
 456         if (!strcasecmp(h->method, "PROPFIND")) {
 457                 propfind_the_room_itself(h, c);
 458                 return;
 459         }
 460
 461         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 462
 463         if (!strcasecmp(h->method, "REPORT")) {
 464                 report_the_room_itself(h, c);
 465                 return;
 466         }
 467
 468         // GET method on the room itself is an API call, possibly from our JavaScript front end
 469
 470         if (!strcasecmp(h->method, "get")) {
 471                 get_the_room_itself(h, c);
 472                 return;
 473         }
 474
 475         // we probably want a "go to this room" for interactive access
 476         do_404(h);
 477 }
 478
 479
 480 /*
 481  * Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 482  */
 483 void room_list(struct http_transaction *h, struct ctdlsession *c)
 484 {
 485         char buf[1024];
 486         char roomname[1024];
 487
 488         ctdl_printf(c, "LKRA");
 489         ctdl_readline(c, buf, sizeof(buf));
 490         if (buf[0] != '1') {
 491                 do_502(h);
 492                 return;
 493         }
 494
 495         JsonValue *j = NewJsonArray(HKEY("lkra"));
 496         while (ctdl_readline(c, buf, sizeof(buf)) , strcmp(buf, "000")) {
 497
 498                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 499                 JsonValue *jr = NewJsonObject(HKEY("room"));
 500
 501                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 502                 JsonObjectAppend(jr, NewJsonPlainString( HKEY("name"),  roomname, -1));
 503
 504                 int ra = extract_int(buf, 5);
 505                 JsonObjectAppend(jr, NewJsonBool( HKEY("known"), (ra && UA_KNOWN)));
 506                 JsonObjectAppend(jr, NewJsonBool( HKEY("hasnewmsgs"), (ra && UA_HASNEWMSGS)));
 507
 508                 int floor = extract_int(buf, 2);
 509                 JsonObjectAppend(jr, NewJsonNumber( HKEY("floor"), floor));
 510
 511                 int rorder = extract_int(buf, 3);
 512                 JsonObjectAppend(jr, NewJsonNumber( HKEY("rorder"), rorder));
 513
 514                 JsonArrayAppend(j, jr);                 // add the room to the array
 515         }
 516
 517         StrBuf *sj = NewStrBuf();
 518         SerializeJson(sj, j, 1);                        // '1' == free the source array
 519
 520         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 521         h->response_code = 200;
 522         h->response_string = strdup("OK");
 523         h->response_body_length = StrLength(sj);
 524         h->response_body = SmashStrBuf(&sj);
 525 }
 526
 527
 528 /*
 529  * Dispatcher for paths starting with /ctdl/r/
 530  */
 531 void ctdl_r(struct http_transaction *h, struct ctdlsession *c)
 532 {
 533         char requested_roomname[128];
 534         char buf[1024];
 535
 536         // All room-related functions require being "in" the room specified.  Are we in that room already?
 537         extract_token(requested_roomname, h->uri, 3, '/', sizeof requested_roomname);
 538         unescape_input(requested_roomname);
 539
 540         if (IsEmptyStr(requested_roomname)) {                   //      /ctdl/r/
 541                 room_list(h, c);
 542                 return;
 543         }
 544
 545         // If not, try to go there.
 546         if (strcasecmp(requested_roomname, c->room)) {
 547                 ctdl_printf(c, "GOTO %s", requested_roomname);
 548                 ctdl_readline(c, buf, sizeof(buf));
 549                 if (buf[0] == '2') {
 550                         // buf[3] will indicate whether any instant messages are waiting
 551                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 552                         c->new_messages = extract_int(&buf[4], 1);
 553                         c->total_messages = extract_int(&buf[4], 2);
 554                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 555                         //      4       (int)CCC->room.QRflags          Various flags associated with this room.
 556                         //      5       (long)CCC->room.QRhighest       The highest message number present in this room
 557                         c->last_seen = extract_long(&buf[4], 6);        // The highest message number the user has read in this room
 558                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 559                         //      8       (int)raideflag                  Nonzero if user is either Aide or a Room Aide in this room
 560                         //      9       (int)newmailcount               The number of new Mail messages the user has
 561                         //      10      (int)CCC->room.QRfloor          The floor number this room resides on
 562                         c->room_current_view = extract_int(&buf[4], 11);
 563                         c->room_default_view = extract_int(&buf[4], 12);
 564                         //      13      (int)is_trash                   Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 565                         //      14      (int)CCC->room.QRflags2         More flags associated with this room
 566                         //      15      (long)CCC->room.QRmtime         Timestamp of the last write activity in this room
 567                 }
 568                 else {
 569                         do_404(h);
 570                         return;
 571                 }
 572         }
 573
 574         // At this point our Citadel client session is "in" the specified room.
 575
 576         if (num_tokens(h->uri, '/') == 4) {                     //      /ctdl/r/roomname
 577                 the_room_itself(h, c);
 578                 return;
 579         }
 580
 581         extract_token(buf, h->uri, 4, '/', sizeof buf);
 582         if (num_tokens(h->uri, '/') == 5) {
 583                 if (IsEmptyStr(buf)) {
 584                         the_room_itself(h, c);                  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 585                 }
 586                 else {
 587                         object_in_room(h, c);                   //      /ctdl/r/roomname/object
 588                 }
 589                 return;
 590         }
 591         if (num_tokens(h->uri, '/') == 6) {
 592                 object_in_room(h, c);                           //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 593                 return;
 594         }
 595
 596         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 597         do_404(h);
 598 }