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