webcit-ng/room_functions.c

   1 // Room functions
   2 //
   3 // Copyright (c) 1996-2022 by the citadel.org team
   4 //
   5 // This program is open source software.  Use, duplication, or
   6 // disclosure are subject to the GNU General Public License v3.
   7
   8 #include "webcit.h"
   9
  10
  11 // Return a "zero-terminated" array of message numbers in the current room.
  12 // Caller owns the memory and must free it.  Returns NULL if any problems.
  13 long *get_msglist(struct ctdlsession *c, char *which_msgs) {
  14         char buf[1024];
  15         long *msglist = NULL;
  16         int num_msgs = 0;
  17         int num_alloc = 0;
  18
  19         ctdl_printf(c, "MSGS %s", which_msgs);
  20         ctdl_readline(c, buf, sizeof(buf));
  21         if (buf[0] == '1') {
  22                 do {
  23                         if (num_msgs >= num_alloc) {
  24                                 if (num_alloc == 0) {
  25                                         num_alloc = 1024;
  26                                         msglist = malloc(num_alloc * sizeof(long));
  27                                 }
  28                                 else {
  29                                         num_alloc *= 2;
  30                                         msglist = realloc(msglist, num_alloc * sizeof(long));
  31                                 }
  32                         }
  33                         ctdl_readline(c, buf, sizeof(buf));
  34                         msglist[num_msgs++] = atol(buf);
  35                 } while (strcmp(buf, "000"));   // this makes the last element a "0" terminator
  36         }
  37         return msglist;
  38 }
  39
  40
  41 // Supplied with a list of potential matches from an If-Match: or If-None-Match: header, and
  42 // a message number (which we always use as the entity tag in Citadel), return nonzero if the
  43 // message number matches any of the supplied tags in the string.
  44 int match_etags(char *taglist, long msgnum) {
  45         int num_tags = num_tokens(taglist, ',');
  46         int i = 0;
  47         char tag[1024];
  48
  49         if (msgnum <= 0) {                                      // no msgnum?  no match.
  50                 return (0);
  51         }
  52
  53         for (i = 0; i < num_tags; ++i) {
  54                 extract_token(tag, taglist, i, ',', sizeof tag);
  55                 striplt(tag);
  56                 char *lq = (strchr(tag, '"'));
  57                 char *rq = (strrchr(tag, '"'));
  58                 if (lq < rq) {                                  // has two double quotes
  59                         strcpy(rq, "");
  60                         strcpy(tag, ++lq);
  61                 }
  62                 striplt(tag);
  63                 if (!strcmp(tag, "*")) {                        // wildcard match
  64                         return (1);
  65                 }
  66                 long tagmsgnum = atol(tag);
  67                 if ((tagmsgnum > 0) && (tagmsgnum == msgnum)) { // match
  68                         return (1);
  69                 }
  70         }
  71
  72         return (0);                                             // no match
  73 }
  74
  75
  76 // Client is requesting a mailbox summary of the current room
  77 void json_mailbox(struct http_transaction *h, struct ctdlsession *c) {
  78         char buf[1024];
  79         char field[1024];
  80         JsonValue *j = NewJsonArray(HKEY("msgs"));
  81
  82         ctdl_printf(c, "MSGS ALL|||9");                         // "9" as the fourth parameter delivers a mailbox summary
  83         ctdl_readline(c, buf, sizeof(buf));
  84         if (buf[0] == '1') {
  85                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))) {
  86                         utf8ify_rfc822_string(buf);
  87                         JsonValue *jmsg = NewJsonObject(HKEY("message"));
  88                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgnum"), extract_long(buf, 0)));
  89                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("time"), extract_long(buf, 1)));
  90                         extract_token(field, buf, 2, '|', sizeof field);
  91                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("author"), field, -1));
  92                         extract_token(field, buf, 4, '|', sizeof field);
  93                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("addr"), field, -1));
  94                         extract_token(field, buf, 5, '|', sizeof field);
  95                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("subject"), field, -1));
  96                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgidhash"), extract_long(buf, 6)));
  97                         extract_token(field, buf, 7, '|', sizeof field);
  98                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("references"), field, -1));
  99                         JsonArrayAppend(j, jmsg);               // add the message to the array
 100                 }
 101         }
 102
 103         StrBuf *sj = NewStrBuf();
 104         SerializeJson(sj, j, 1);                                // '1' == free the source array
 105
 106         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 107         h->response_code = 200;
 108         h->response_string = strdup("OK");
 109         h->response_body_length = StrLength(sj);
 110         h->response_body = SmashStrBuf(&sj);
 111         return;
 112 }
 113
 114
 115 // Client is requesting a message list
 116 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which) {
 117         int i = 0;
 118         long *msglist = get_msglist(c, which);
 119         JsonValue *j = NewJsonArray(HKEY("msgs"));
 120
 121         if (msglist != NULL) {
 122                 for (i = 0; msglist[i] > 0; ++i) {
 123                         JsonArrayAppend(j, NewJsonNumber(HKEY("m"), msglist[i]));
 124                 }
 125                 free(msglist);
 126         }
 127
 128         StrBuf *sj = NewStrBuf();
 129         SerializeJson(sj, j, 1);                                // '1' == free the source array
 130
 131         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 132         h->response_code = 200;
 133         h->response_string = strdup("OK");
 134         h->response_body_length = StrLength(sj);
 135         h->response_body = SmashStrBuf(&sj);
 136         return;
 137 }
 138
 139
 140 // Client is requesting the room info banner
 141 void read_room_info_banner(struct http_transaction *h, struct ctdlsession *c) {
 142         char buf[1024];
 143
 144         ctdl_printf(c, "RINF");
 145         ctdl_readline(c, buf, sizeof(buf));
 146         if (buf[0] == '1') {
 147                 StrBuf *info = NewStrBuf();
 148                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))){
 149                         StrBufAppendPrintf(info, "%s\n", buf);
 150                 }
 151                 add_response_header(h, strdup("Content-type"), strdup("text/plain"));
 152                 h->response_code = 200;
 153                 h->response_string = strdup("OK");
 154                 h->response_body_length = StrLength(info);
 155                 h->response_body = SmashStrBuf(&info);
 156                 return;
 157         }
 158         else {
 159                 do_404(h);
 160         }
 161 }
 162
 163
 164 // Client is setting the "Last Read Pointer" (marking all messages as "seen" up to this message)
 165 void set_last_read_pointer(struct http_transaction *h, struct ctdlsession *c) {
 166         char cbuf[1024];
 167         ctdl_printf(c, "SLRP %d", atoi(get_url_param(h, "last")));
 168         ctdl_readline(c, cbuf, sizeof(cbuf));
 169         if (cbuf[0] == '2') {
 170                 do_204(h);
 171         }
 172         else {
 173                 do_404(h);
 174         }
 175 }
 176
 177
 178 // Client requested an object in a room.
 179 void object_in_room(struct http_transaction *h, struct ctdlsession *c) {
 180         char buf[1024];
 181         long msgnum = (-1);
 182         char unescaped_euid[1024];
 183
 184         extract_token(buf, h->url, 4, '/', sizeof buf);
 185
 186         if (!strcasecmp(buf, "mailbox")) {              // Client is requesting a mailbox summary
 187                 json_mailbox(h, c);
 188                 return;
 189         }
 190
 191         if (!strncasecmp(buf, "msgs.", 5)) {            // Client is requesting a list of message numbers
 192                 unescape_input(&buf[5]);
 193                 json_msglist(h, c, &buf[5]);
 194                 return;
 195         }
 196
 197         if (!strcasecmp(buf, "info.txt")) {             // Client is requesting the room info banner
 198                 read_room_info_banner(h, c);
 199                 return;
 200         }
 201
 202         if (!strcasecmp(buf, "slrp")) {                 // Set the Last Read Pointer
 203                 set_last_read_pointer(h, c);
 204                 return;
 205         }
 206
 207         // If we get to this point, the client is requesting a specific object *in* the room.
 208
 209         if ((c->room_default_view == VIEW_CALENDAR)     // room types where objects are referenced by EUID
 210            || (c->room_default_view == VIEW_TASKS)
 211            || (c->room_default_view == VIEW_ADDRESSBOOK)
 212            ) {
 213                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 214                 unescape_input(unescaped_euid);
 215                 msgnum = locate_message_by_uid(c, unescaped_euid);
 216         }
 217         else {                                          // otherwise the object is being referenced by message number
 218                 msgnum = atol(buf);
 219         }
 220
 221         // All methods except PUT require the message to already exist
 222         if ((msgnum <= 0) && (strcasecmp(h->method, "PUT"))) {
 223                 do_404(h);
 224         }
 225
 226         // If we get to this point we have a valid message number in an accessible room.
 227         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 228
 229         // A sixth component in the URL can be one of two things:
 230         // (1) a MIME part specifier, in which case the client wants to download that component within the message
 231         // (2) a content-type, in which ase the client wants us to try to render it a certain way
 232         if (num_tokens(h->url, '/') == 6) {
 233                 extract_token(buf, h->url, 5, '/', sizeof buf);
 234                 if (!IsEmptyStr(buf)) {
 235                         if (!strcasecmp(buf, "json")) {
 236                                 json_render_one_message(h, c, msgnum);
 237                         }
 238                         else {
 239                                 download_mime_component(h, c, msgnum, buf);
 240                         }
 241                         return;
 242                 }
 243         }
 244
 245         // Ok, we want a full message, but first let's check for the if[-none]-match headers.
 246         char *if_match = header_val(h, "If-Match");
 247         if ((if_match != NULL) && (!match_etags(if_match, msgnum))) {
 248                 do_412(h);
 249                 return;
 250         }
 251
 252         char *if_none_match = header_val(h, "If-None-Match");
 253         if ((if_none_match != NULL) && (match_etags(if_none_match, msgnum))) {
 254                 do_412(h);
 255                 return;
 256         }
 257
 258         // DOOOOOO ITTTTT!!!
 259
 260         if (!strcasecmp(h->method, "DELETE")) {
 261                 dav_delete_message(h, c, msgnum);
 262         }
 263         else if (!strcasecmp(h->method, "GET")) {
 264                 dav_get_message(h, c, msgnum);
 265         }
 266         else if (!strcasecmp(h->method, "PUT")) {
 267                 dav_put_message(h, c, unescaped_euid, msgnum);
 268         }
 269         else {
 270                 do_404(h);      // Got this far but the method made no sense?  Bummer.
 271         }
 272
 273 }
 274
 275
 276 // Called by the_room_itself() when the HTTP method is REPORT
 277 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 278         if (c->room_default_view == VIEW_CALENDAR) {
 279                 caldav_report(h, c);    // CalDAV REPORTs ... fmgwac
 280                 return;
 281         }
 282
 283         do_404(h);              // future implementations like CardDAV will require code paths here
 284 }
 285
 286
 287 // Called by the_room_itself() when the HTTP method is OPTIONS
 288 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 289         h->response_code = 200;
 290         h->response_string = strdup("OK");
 291         if (c->room_default_view == VIEW_CALENDAR) {
 292                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 293         }
 294         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 295                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 296         }
 297         else {
 298                 add_response_header(h, strdup("DAV"), strdup("1"));     // ordinary WebDAV for all other room types
 299         }
 300         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE"));
 301 }
 302
 303
 304 // Called by the_room_itself() when the HTTP method is PROPFIND
 305 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 306         char *e;
 307         long timestamp;
 308         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 309         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 310         StrBuf *Buf = NewStrBuf();
 311
 312         StrBufAppendPrintf(Buf, "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 313                            "<D:multistatus " "xmlns:D=\"DAV:\" " "xmlns:C=\"urn:ietf:params:xml:ns:caldav\"" ">");
 314
 315         // Transmit the collection resource
 316         StrBufAppendPrintf(Buf, "<D:response>");
 317         StrBufAppendPrintf(Buf, "<D:href>");
 318         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 319         StrBufAppendPrintf(Buf, "/ctdl/r/");
 320         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 321         StrBufAppendPrintf(Buf, "</D:href>");
 322
 323         StrBufAppendPrintf(Buf, "<D:propstat>");
 324         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 325         StrBufAppendPrintf(Buf, "<D:prop>");
 326         StrBufAppendPrintf(Buf, "<D:displayname>");
 327         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 328         StrBufAppendPrintf(Buf, "</D:displayname>");
 329
 330         StrBufAppendPrintf(Buf, "<D:owner />"); // empty owner ought to be legal; see rfc3744 section 5.1
 331
 332         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 333         switch (c->room_default_view) {
 334         case VIEW_CALENDAR:
 335                 StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 336                 break;
 337         }
 338         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 339
 340         int enumerate_by_euid = 0;      // nonzero if messages will be retrieved by euid instead of msgnum
 341         switch (c->room_default_view) {
 342         case VIEW_CALENDAR:             // RFC4791 section 5.2
 343                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
 344                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 345                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 346                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 347                 enumerate_by_euid = 1;
 348                 break;
 349         case VIEW_TASKS:                // RFC4791 section 5.2
 350                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 351                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 352                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 353                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 354                 enumerate_by_euid = 1;
 355                 break;
 356         case VIEW_ADDRESSBOOK:          // FIXME put some sort of CardDAV crapola here when we implement it
 357                 enumerate_by_euid = 1;
 358                 break;
 359         case VIEW_WIKI:                 // FIXME invent "WikiDAV" ?  The versioning stuff in DAV could be useful.
 360                 enumerate_by_euid = 1;
 361                 break;
 362         }
 363
 364         // FIXME get the mtime
 365         // StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 366         // escputs(datestring);
 367         // StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 368
 369         StrBufAppendPrintf(Buf, "</D:prop>");
 370         StrBufAppendPrintf(Buf, "</D:propstat>");
 371         StrBufAppendPrintf(Buf, "</D:response>\n");
 372
 373         // If a depth greater than zero was specified, transmit the collection listing
 374         // BEGIN COLLECTION
 375         if (dav_depth > 0) {
 376                 long *msglist = get_msglist(c, "ALL");
 377                 if (msglist) {
 378                         int i;
 379                         for (i = 0; (msglist[i] > 0); ++i) {
 380                                 if ((i % 10) == 0)
 381                                         syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 382                                 e = NULL;       // EUID gets stored here
 383                                 timestamp = 0;
 384
 385                                 char cbuf[1024];
 386                                 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
 387                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 388                                 if (cbuf[0] == '1')
 389                                         while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 390                                                 if ((enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5))) {
 391                                                         // e = strdup(&cbuf[5]);
 392                                                         int elen = (2 * strlen(&cbuf[5]));
 393                                                         e = malloc(elen);
 394                                                         urlesc(e, elen, &cbuf[5]);
 395                                                 }
 396                                                 if (!strncasecmp(cbuf, "time=", 5)) {
 397                                                         timestamp = atol(&cbuf[5]);
 398                                                 }
 399                                         }
 400                                 if (e == NULL) {
 401                                         e = malloc(20);
 402                                         sprintf(e, "%ld", msglist[i]);
 403                                 }
 404                                 StrBufAppendPrintf(Buf, "<D:response>");
 405
 406                                 // Generate the 'href' tag for this message
 407                                 StrBufAppendPrintf(Buf, "<D:href>");
 408                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 409                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 410                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 411                                 StrBufAppendPrintf(Buf, "/");
 412                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 413                                 StrBufAppendPrintf(Buf, "</D:href>");
 414                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 415                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 416                                 StrBufAppendPrintf(Buf, "<D:prop>");
 417
 418                                 switch (c->room_default_view) {
 419                                 case VIEW_CALENDAR:
 420                                         StrBufAppendPrintf(Buf,
 421                                                            "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 422                                         break;
 423                                 case VIEW_TASKS:
 424                                         StrBufAppendPrintf(Buf,
 425                                                            "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 426                                         break;
 427                                 case VIEW_ADDRESSBOOK:
 428                                         StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 429                                         break;
 430                                 }
 431
 432                                 if (timestamp > 0) {
 433                                         char *datestring = http_datestring(timestamp);
 434                                         if (datestring) {
 435                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 436                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 437                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 438                                                 free(datestring);
 439                                         }
 440                                         if (enumerate_by_euid) {        // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
 441                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
 442                                         }
 443                                 }
 444                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 445                                 free(e);
 446                         }
 447                         free(msglist);
 448                 };
 449         }
 450         // END COLLECTION
 451
 452         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 453
 454         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 455         h->response_code = 207;
 456         h->response_string = strdup("Multi-Status");
 457         h->response_body_length = StrLength(Buf);
 458         h->response_body = SmashStrBuf(&Buf);
 459 }
 460
 461 // some good examples here
 462 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 463
 464
 465 // Called by the_room_itself() when the HTTP method is PROPFIND
 466 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 467         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 468
 469         JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), c->room, -1));
 470         JsonObjectAppend(j, NewJsonNumber(HKEY("current_view"), c->room_current_view));
 471         JsonObjectAppend(j, NewJsonNumber(HKEY("default_view"), c->room_default_view));
 472         JsonObjectAppend(j, NewJsonNumber(HKEY("is_room_aide"), c->is_room_aide));
 473         JsonObjectAppend(j, NewJsonNumber(HKEY("can_delete_messages"), c->can_delete_messages));
 474         JsonObjectAppend(j, NewJsonNumber(HKEY("new_messages"), c->new_messages));
 475         JsonObjectAppend(j, NewJsonNumber(HKEY("total_messages"), c->total_messages));
 476         JsonObjectAppend(j, NewJsonNumber(HKEY("last_seen"), c->last_seen));
 477
 478         StrBuf *sj = NewStrBuf();
 479         SerializeJson(sj, j, 1);        // '1' == free the source array
 480
 481         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 482         h->response_code = 200;
 483         h->response_string = strdup("OK");
 484         h->response_body_length = StrLength(sj);
 485         h->response_body = SmashStrBuf(&sj);
 486         return;
 487 }
 488
 489
 490 // Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 491 // or /ctdl/r/roomname/ but *not* specific objects within the room)
 492 void the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 493
 494         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 495         if (!strcasecmp(h->method, "OPTIONS")) {
 496                 options_the_room_itself(h, c);
 497                 return;
 498         }
 499
 500         // PROPFIND method on the room itself could be looking for a directory
 501         if (!strcasecmp(h->method, "PROPFIND")) {
 502                 propfind_the_room_itself(h, c);
 503                 return;
 504         }
 505
 506         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 507         if (!strcasecmp(h->method, "REPORT")) {
 508                 report_the_room_itself(h, c);
 509                 return;
 510         }
 511
 512         // GET method on the room itself is an API call, possibly from our JavaScript front end
 513         if (!strcasecmp(h->method, "get")) {
 514                 get_the_room_itself(h, c);
 515                 return;
 516         }
 517
 518         // we probably want a "go to this room" for interactive access
 519         do_404(h);
 520 }
 521
 522
 523 // Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 524 void room_list(struct http_transaction *h, struct ctdlsession *c) {
 525         char buf[1024];
 526         char roomname[1024];
 527
 528         ctdl_printf(c, "LKRA");
 529         ctdl_readline(c, buf, sizeof(buf));
 530         if (buf[0] != '1') {
 531                 do_502(h);
 532                 return;
 533         }
 534
 535         JsonValue *j = NewJsonArray(HKEY("lkra"));
 536         while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
 537
 538                 // 0   |1      |2      |3      |4       |5 |6           |7           |8
 539                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 540                 JsonValue *jr = NewJsonObject(HKEY("room"));
 541
 542                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 543                 JsonObjectAppend(jr, NewJsonPlainString(HKEY("name"), roomname, -1));
 544
 545                 JsonObjectAppend(jr, NewJsonNumber(HKEY("floor"), extract_int(buf, 2)));
 546                 JsonObjectAppend(jr, NewJsonNumber(HKEY("rorder"), extract_int(buf, 3)));
 547
 548                 int ra = extract_int(buf, 5);
 549                 JsonObjectAppend(jr, NewJsonBool(HKEY("known"), (ra & UA_KNOWN)));
 550                 JsonObjectAppend(jr, NewJsonBool(HKEY("hasnewmsgs"), (ra & UA_HASNEWMSGS)));
 551
 552                 JsonObjectAppend(jr, NewJsonNumber(HKEY("current_view"), extract_int(buf, 6)));
 553                 JsonObjectAppend(jr, NewJsonNumber(HKEY("default_view"), extract_int(buf, 7)));
 554                 JsonObjectAppend(jr, NewJsonNumber(HKEY("mtime"), extract_int(buf, 8)));
 555
 556                 JsonArrayAppend(j, jr); // add the room to the array
 557         }
 558
 559         StrBuf *sj = NewStrBuf();
 560         SerializeJson(sj, j, 1);        // '1' == free the source array
 561
 562         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 563         h->response_code = 200;
 564         h->response_string = strdup("OK");
 565         h->response_body_length = StrLength(sj);
 566         h->response_body = SmashStrBuf(&sj);
 567 }
 568
 569
 570 // Dispatcher for paths starting with /ctdl/r/
 571 void ctdl_r(struct http_transaction *h, struct ctdlsession *c) {
 572         char requested_roomname[128];
 573         char buf[1024];
 574         long room_flags = 0;
 575         long room_flags2 = 0;
 576
 577         // All room-related functions require being "in" the room specified.  Are we in that room already?
 578         extract_token(requested_roomname, h->url, 3, '/', sizeof requested_roomname);
 579         unescape_input(requested_roomname);
 580
 581         if (IsEmptyStr(requested_roomname)) {   //      /ctdl/r/
 582                 room_list(h, c);
 583                 return;
 584         }
 585         // If not, try to go there.
 586         if (strcasecmp(requested_roomname, c->room)) {
 587                 ctdl_printf(c, "GOTO %s", requested_roomname);
 588                 ctdl_readline(c, buf, sizeof(buf));
 589                 if (buf[0] == '2') {
 590                         // buf[3] will indicate whether any instant messages are waiting
 591                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 592                         c->new_messages = extract_int(&buf[4], 1);
 593                         c->total_messages = extract_int(&buf[4], 2);
 594                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 595                         room_flags = extract_long(&buf[4], 3);          // Various flags associated with this room.
 596                         //      5       (long)CC->room.QRhighest        The highest message number present in this room
 597                         c->last_seen = extract_long(&buf[4], 6);        // The highest message number the user has read in this room
 598                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 599                         c->is_room_aide = extract_int(&buf[4], 8);
 600                         //      9       (int)newmailcount               The number of new Mail messages the user has
 601                         //      10      (int)CC->room.QRfloor           The floor number this room resides on
 602                         c->room_current_view = extract_int(&buf[4], 11);
 603                         c->room_default_view = extract_int(&buf[4], 12);
 604                         //      13      (int)is_trash                   Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 605                         room_flags2 = extract_long(&buf[4], 14);        // More flags associated with this room.
 606                         //      15      (long)CC->room.QRmtime          Timestamp of the last write activity in this room
 607
 608                         // If any of these three conditions are met, let the client know it has permission to delete messages.
 609                         if ((c->is_room_aide) || (room_flags & QR_MAILBOX) || (room_flags2 & QR2_COLLABDEL)) {
 610                                 c->can_delete_messages = 1;
 611                         }
 612                         else {
 613                                 c->can_delete_messages = 0;
 614                         }
 615                 }
 616                 else {
 617                         do_404(h);
 618                         return;
 619                 }
 620         }
 621         // At this point our Citadel client session is "in" the specified room.
 622
 623         if (num_tokens(h->url, '/') == 4) {     //      /ctdl/r/roomname
 624                 the_room_itself(h, c);
 625                 return;
 626         }
 627
 628         extract_token(buf, h->url, 4, '/', sizeof buf);
 629         if (num_tokens(h->url, '/') == 5) {
 630                 if (IsEmptyStr(buf)) {
 631                         the_room_itself(h, c);  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 632                 }
 633                 else {
 634                         object_in_room(h, c);   //      /ctdl/r/roomname/object
 635                 }
 636                 return;
 637         }
 638         if (num_tokens(h->url, '/') == 6) {
 639                 object_in_room(h, c);   //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 640                 return;
 641         }
 642         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 643         do_404(h);
 644 }