webcit-ng/server/room_functions.c

   1 // Room functions
   2 //
   3 // Copyright (c) 1996-2023 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                 string_trim(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                 string_trim(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 STAT (name and modification time) of the current room
  77 void json_stat(struct http_transaction *h, struct ctdlsession *c) {
  78         char buf[1024];
  79         char field[1024];
  80
  81         ctdl_printf(c, "STAT");
  82         ctdl_readline(c, buf, sizeof(buf));
  83         if (buf[0] == '2') {
  84                 JsonValue *j = NewJsonObject(HKEY("stat"));
  85                 extract_token(field, &buf[4], 0, '|', sizeof field);
  86                 JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), field, -1));
  87                 JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), extract_long(&buf[4], 1)));
  88
  89                 StrBuf *sj = NewStrBuf();
  90                 SerializeJson(sj, j, 1);                                // '1' == free the source array
  91                 add_response_header(h, strdup("Content-type"), strdup("application/json"));
  92                 h->response_code = 200;
  93                 h->response_string = strdup("OK");
  94                 h->response_body_length = StrLength(sj);
  95                 h->response_body = SmashStrBuf(&sj);
  96         }
  97         else {
  98                 do_404(h);
  99         }
 100         return;
 101 }
 102
 103
 104 // Client is requesting a mailbox summary of the current room
 105 void json_mailbox(struct http_transaction *h, struct ctdlsession *c) {
 106         char buf[1024];
 107         char field[1024];
 108         JsonValue *j = NewJsonArray(HKEY("msgs"));
 109
 110         ctdl_printf(c, "MSGS ALL|||9");                         // "9" as the fourth parameter delivers a mailbox summary
 111         ctdl_readline(c, buf, sizeof(buf));
 112         if (buf[0] == '1') {
 113                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))) {
 114                         JsonValue *jmsg = NewJsonObject(HKEY("message"));
 115                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgnum"), extract_long(buf, 0)));
 116                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("time"), extract_long(buf, 1)));
 117                         extract_token(field, buf, 2, '|', sizeof field);
 118                         utf8ify_rfc822_string(field);
 119                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("author"), field, -1));
 120                         extract_token(field, buf, 4, '|', sizeof field);
 121                         utf8ify_rfc822_string(field);
 122                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("addr"), field, -1));
 123                         extract_token(field, buf, 5, '|', sizeof field);
 124                         utf8ify_rfc822_string(field);
 125                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("subject"), field, -1));
 126                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgidhash"), extract_long(buf, 6)));
 127                         extract_token(field, buf, 7, '|', sizeof field);
 128                         utf8ify_rfc822_string(field);
 129                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("references"), field, -1));
 130                         JsonArrayAppend(j, jmsg);               // add the message to the array
 131                 }
 132         }
 133
 134         StrBuf *sj = NewStrBuf();
 135         SerializeJson(sj, j, 1);                                // '1' == free the source array
 136
 137         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 138         h->response_code = 200;
 139         h->response_string = strdup("OK");
 140         h->response_body_length = StrLength(sj);
 141         h->response_body = SmashStrBuf(&sj);
 142         return;
 143 }
 144
 145
 146 // Client is requesting a message list
 147 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which) {
 148         int i = 0;
 149         long *msglist = get_msglist(c, which);
 150         JsonValue *j = NewJsonArray(HKEY("msgs"));
 151
 152         if (msglist != NULL) {
 153                 for (i = 0; msglist[i] > 0; ++i) {
 154                         JsonArrayAppend(j, NewJsonNumber(HKEY("m"), msglist[i]));
 155                 }
 156                 free(msglist);
 157         }
 158
 159         StrBuf *sj = NewStrBuf();
 160         SerializeJson(sj, j, 1);                                // '1' == free the source array
 161
 162         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 163         h->response_code = 200;
 164         h->response_string = strdup("OK");
 165         h->response_body_length = StrLength(sj);
 166         h->response_body = SmashStrBuf(&sj);
 167         return;
 168 }
 169
 170
 171 // Client is requesting the room info banner
 172 void read_room_info_banner(struct http_transaction *h, struct ctdlsession *c) {
 173         char buf[1024];
 174
 175         ctdl_printf(c, "RINF");
 176         ctdl_readline(c, buf, sizeof(buf));
 177         if (buf[0] == '1') {
 178                 StrBuf *info = NewStrBuf();
 179                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))){
 180                         StrBufAppendPrintf(info, "%s\n", buf);
 181                 }
 182                 add_response_header(h, strdup("Content-type"), strdup("text/plain"));
 183                 h->response_code = 200;
 184                 h->response_string = strdup("OK");
 185                 h->response_body_length = StrLength(info);
 186                 h->response_body = SmashStrBuf(&info);
 187                 return;
 188         }
 189         else {
 190                 do_404(h);
 191         }
 192 }
 193
 194
 195 // Client is setting the "Last Read Pointer" (marking all messages as "seen" up to this message)
 196 void set_last_read_pointer(struct http_transaction *h, struct ctdlsession *c) {
 197         char cbuf[1024];
 198         ctdl_printf(c, "SLRP %d", atoi(get_url_param(h, "last")));
 199         ctdl_readline(c, cbuf, sizeof(cbuf));
 200         if (cbuf[0] == '2') {
 201                 do_204(h);
 202         }
 203         else {
 204                 do_404(h);
 205         }
 206 }
 207
 208
 209 // Client requested an object in a room.
 210 void object_in_room(struct http_transaction *h, struct ctdlsession *c) {
 211         char buf[1024];
 212         long msgnum = (-1);
 213         char unescaped_euid[1024];
 214
 215         extract_token(buf, h->url, 4, '/', sizeof buf);
 216
 217         if (!strcasecmp(buf, "mailbox")) {              // Client is requesting a mailbox summary
 218                 json_mailbox(h, c);
 219                 return;
 220         }
 221
 222         if (!strcasecmp(buf, "stat")) {                 // Client is requesting a stat command (name and modification time)
 223                 json_stat(h, c);
 224                 return;
 225         }
 226
 227         if (!strncasecmp(buf, "msgs.", 5)) {            // Client is requesting a list of message numbers
 228                 unescape_input(&buf[5]);
 229                 json_msglist(h, c, &buf[5]);
 230                 return;
 231         }
 232
 233         if (!strcasecmp(buf, "info.txt")) {             // Client is requesting the room info banner
 234                 read_room_info_banner(h, c);
 235                 return;
 236         }
 237
 238         if (!strcasecmp(buf, "slrp")) {                 // Set the Last Read Pointer
 239                 set_last_read_pointer(h, c);
 240                 return;
 241         }
 242
 243         // If we get to this point, the client is requesting a specific object *in* the room.
 244
 245         if ((c->room_default_view == VIEW_CALENDAR)     // room types where objects are referenced by EUID
 246            || (c->room_default_view == VIEW_TASKS)
 247            || (c->room_default_view == VIEW_ADDRESSBOOK)
 248            ) {
 249                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 250                 unescape_input(unescaped_euid);
 251                 msgnum = locate_message_by_uid(c, unescaped_euid);
 252         }
 253         else {                                          // otherwise the object is being referenced by message number
 254                 msgnum = atol(buf);
 255         }
 256
 257         // All methods except PUT require the message to already exist
 258         if ((msgnum <= 0) && (strcasecmp(h->method, "PUT"))) {
 259                 do_404(h);
 260         }
 261
 262         // If we get to this point we have a valid message number in an accessible room.
 263         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 264
 265         // A sixth component in the URL can be one of two things:
 266         // (1) a MIME part specifier, in which case the client wants to download that component within the message
 267         // (2) a content-type, in which ase the client wants us to try to render it a certain way
 268         if (num_tokens(h->url, '/') >= 6) {
 269                 extract_token(buf, h->url, 5, '/', sizeof buf);
 270                 if (!IsEmptyStr(buf)) {
 271                         if (!strcasecmp(buf, "json")) {
 272                                 json_render_one_message(h, c, msgnum);
 273                         }
 274                         else {
 275                                 download_mime_component(h, c, msgnum, buf);
 276                         }
 277                         return;
 278                 }
 279         }
 280
 281         // Ok, we want a full message, but first let's check for the if[-none]-match headers.
 282         char *if_match = header_val(h, "If-Match");
 283         if ((if_match != NULL) && (!match_etags(if_match, msgnum))) {
 284                 do_412(h);
 285                 return;
 286         }
 287
 288         char *if_none_match = header_val(h, "If-None-Match");
 289         if ((if_none_match != NULL) && (match_etags(if_none_match, msgnum))) {
 290                 do_412(h);
 291                 return;
 292         }
 293
 294         // Now perform the requested operation.
 295         if (!strcasecmp(h->method, "DELETE")) {
 296                 dav_delete_message(h, c, msgnum);
 297         }
 298         else if (!strcasecmp(h->method, "GET")) {
 299                 dav_get_message(h, c, msgnum);
 300         }
 301         else if (!strcasecmp(h->method, "PUT")) {
 302                 dav_put_message(h, c, unescaped_euid, msgnum);
 303         }
 304         else if (!strcasecmp(h->method, "MOVE")) {
 305                 dav_move_or_copy_message(h, c, msgnum, DAV_MOVE);
 306         }
 307         else if (!strcasecmp(h->method, "COPY")) {
 308                 dav_move_or_copy_message(h, c, msgnum, DAV_COPY);
 309         }
 310         else {
 311                 do_404(h);              // We should never get here, but if we do, a 404 error is clean.
 312         }
 313 }
 314
 315
 316 // Called by the_room_itself() when the HTTP method is REPORT
 317 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 318         if (c->room_default_view == VIEW_CALENDAR) {
 319                 caldav_report(h, c);    // CalDAV REPORTs ... fmgwac
 320                 return;
 321         }
 322
 323         do_404(h);                      // future implementations like CardDAV will require code paths here
 324 }
 325
 326
 327 // Called by the_room_itself() when the HTTP method is OPTIONS
 328 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 329         h->response_code = 200;
 330         h->response_string = strdup("OK");
 331         if (c->room_default_view == VIEW_CALENDAR) {
 332                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 333         }
 334         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 335                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 336         }
 337         else {
 338                 add_response_header(h, strdup("DAV"), strdup("1"));     // ordinary WebDAV for all other room types
 339         }
 340         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE, MOVE, COPY"));
 341 }
 342
 343
 344 // Called by the_room_itself() when the HTTP method is PROPFIND
 345 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 346         char *e;
 347         long timestamp;
 348         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 349         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 350         StrBuf *Buf = NewStrBuf();
 351
 352         StrBufAppendPrintf(Buf,
 353                 "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 354                 "<D:multistatus "
 355                 "xmlns:D=\"DAV:\" "
 356                 "xmlns:C=\"urn:ietf:params:xml:ns:caldav\""
 357                 ">"
 358         );
 359
 360         // Transmit the collection resource
 361         StrBufAppendPrintf(Buf, "<D:response>");
 362         StrBufAppendPrintf(Buf, "<D:href>");
 363         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 364         StrBufAppendPrintf(Buf, "/ctdl/r/");
 365         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 366         StrBufAppendPrintf(Buf, "</D:href>");
 367
 368         StrBufAppendPrintf(Buf, "<D:propstat>");
 369         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 370         StrBufAppendPrintf(Buf, "<D:prop>");
 371         StrBufAppendPrintf(Buf, "<D:displayname>");
 372         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 373         StrBufAppendPrintf(Buf, "</D:displayname>");
 374
 375         StrBufAppendPrintf(Buf, "<D:owner />"); // empty owner ought to be legal; see rfc3744 section 5.1
 376
 377         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 378         switch (c->room_default_view) {
 379         case VIEW_CALENDAR:
 380                 StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 381                 break;
 382         }
 383         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 384
 385         int enumerate_by_euid = 0;      // nonzero if messages will be retrieved by euid instead of msgnum
 386         switch (c->room_default_view) {
 387         case VIEW_CALENDAR:             // RFC4791 section 5.2
 388                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
 389                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 390                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 391                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 392                 enumerate_by_euid = 1;
 393                 break;
 394         case VIEW_TASKS:                // RFC4791 section 5.2
 395                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 396                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 397                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 398                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 399                 enumerate_by_euid = 1;
 400                 break;
 401         case VIEW_ADDRESSBOOK:          // FIXME put some sort of CardDAV crapola here when we implement it
 402                 enumerate_by_euid = 1;
 403                 break;
 404         case VIEW_WIKI:                 // FIXME invent "WikiDAV" ?  The versioning stuff in DAV could be useful.
 405                 enumerate_by_euid = 1;
 406                 break;
 407         }
 408
 409         // FIXME get the mtime
 410         // StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 411         // escputs(datestring);
 412         // StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 413
 414         StrBufAppendPrintf(Buf, "</D:prop>");
 415         StrBufAppendPrintf(Buf, "</D:propstat>");
 416         StrBufAppendPrintf(Buf, "</D:response>\n");
 417
 418         // If a depth greater than zero was specified, transmit the collection listing
 419         // BEGIN COLLECTION
 420         if (dav_depth > 0) {
 421                 long *msglist = get_msglist(c, "ALL");
 422                 if (msglist) {
 423                         int i;
 424                         for (i = 0; (msglist[i] > 0); ++i) {
 425                                 if ((i % 10) == 0) {
 426                                         syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 427                                 }
 428                                 e = NULL;               // EUID gets stored here
 429                                 timestamp = 0;
 430
 431                                 char cbuf[1024];
 432                                 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
 433                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 434                                 if (cbuf[0] == '1')
 435                                         while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 436                                                 if ((enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5))) {
 437                                                         // e = strdup(&cbuf[5]);
 438                                                         int elen = (2 * strlen(&cbuf[5]));
 439                                                         e = malloc(elen);
 440                                                         urlesc(e, elen, &cbuf[5]);
 441                                                 }
 442                                                 if (!strncasecmp(cbuf, "time=", 5)) {
 443                                                         timestamp = atol(&cbuf[5]);
 444                                                 }
 445                                         }
 446                                 if (e == NULL) {
 447                                         e = malloc(20);
 448                                         sprintf(e, "%ld", msglist[i]);
 449                                 }
 450                                 StrBufAppendPrintf(Buf, "<D:response>");
 451
 452                                 // Generate the 'href' tag for this message
 453                                 StrBufAppendPrintf(Buf, "<D:href>");
 454                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 455                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 456                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 457                                 StrBufAppendPrintf(Buf, "/");
 458                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 459                                 StrBufAppendPrintf(Buf, "</D:href>");
 460                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 461                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 462                                 StrBufAppendPrintf(Buf, "<D:prop>");
 463
 464                                 switch (c->room_default_view) {
 465                                 case VIEW_CALENDAR:
 466                                         StrBufAppendPrintf(Buf,
 467                                                            "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 468                                         break;
 469                                 case VIEW_TASKS:
 470                                         StrBufAppendPrintf(Buf,
 471                                                            "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 472                                         break;
 473                                 case VIEW_ADDRESSBOOK:
 474                                         StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 475                                         break;
 476                                 }
 477
 478                                 if (timestamp > 0) {
 479                                         char *datestring = http_datestring(timestamp);
 480                                         if (datestring) {
 481                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 482                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 483                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 484                                                 free(datestring);
 485                                         }
 486                                         if (enumerate_by_euid) {        // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
 487                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
 488                                         }
 489                                 }
 490                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 491                                 free(e);
 492                         }
 493                         free(msglist);
 494                 };
 495         }
 496         // END COLLECTION
 497
 498         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 499
 500         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 501         h->response_code = 207;
 502         h->response_string = strdup("Multi-Status");
 503         h->response_body_length = StrLength(Buf);
 504         h->response_body = SmashStrBuf(&Buf);
 505 }
 506
 507 // some good examples here
 508 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 509
 510
 511 // Called by the_room_itself() when the HTTP method is PROPFIND
 512 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 513         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 514
 515         JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), c->room, -1));
 516         JsonObjectAppend(j, NewJsonNumber(HKEY("current_view"), c->room_current_view));
 517         JsonObjectAppend(j, NewJsonNumber(HKEY("default_view"), c->room_default_view));
 518         JsonObjectAppend(j, NewJsonNumber(HKEY("is_room_aide"), c->is_room_aide));
 519         JsonObjectAppend(j, NewJsonNumber(HKEY("is_trash_folder"), c->is_trash_folder));
 520         JsonObjectAppend(j, NewJsonNumber(HKEY("can_delete_messages"), c->can_delete_messages));
 521         JsonObjectAppend(j, NewJsonNumber(HKEY("new_messages"), c->new_messages));
 522         JsonObjectAppend(j, NewJsonNumber(HKEY("total_messages"), c->total_messages));
 523         JsonObjectAppend(j, NewJsonNumber(HKEY("last_seen"), c->last_seen));
 524         JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), c->room_mtime));
 525
 526         StrBuf *sj = NewStrBuf();
 527         SerializeJson(sj, j, 1);        // '1' == free the source array
 528
 529         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 530         h->response_code = 200;
 531         h->response_string = strdup("OK");
 532         h->response_body_length = StrLength(sj);
 533         h->response_body = SmashStrBuf(&sj);
 534         return;
 535 }
 536
 537
 538 // Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 539 // or /ctdl/r/roomname/ but *not* specific objects within the room)
 540 void the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 541
 542         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 543         if (!strcasecmp(h->method, "OPTIONS")) {
 544                 options_the_room_itself(h, c);
 545                 return;
 546         }
 547
 548         // PROPFIND method on the room itself could be looking for a directory
 549         if (!strcasecmp(h->method, "PROPFIND")) {
 550                 propfind_the_room_itself(h, c);
 551                 return;
 552         }
 553
 554         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 555         if (!strcasecmp(h->method, "REPORT")) {
 556                 report_the_room_itself(h, c);
 557                 return;
 558         }
 559
 560         // GET method on the room itself is an API call, possibly from our JavaScript front end
 561         if (!strcasecmp(h->method, "get")) {
 562                 get_the_room_itself(h, c);
 563                 return;
 564         }
 565
 566         // we probably want a "go to this room" for interactive access
 567         do_404(h);
 568 }
 569
 570
 571 // Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 572 void room_list(struct http_transaction *h, struct ctdlsession *c) {
 573         char buf[1024];
 574         char roomname[1024];
 575
 576         ctdl_printf(c, "LKRA");
 577         ctdl_readline(c, buf, sizeof(buf));
 578         if (buf[0] != '1') {
 579                 do_502(h);
 580                 return;
 581         }
 582
 583         JsonValue *j = NewJsonArray(HKEY("lkra"));
 584         while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
 585
 586                 // 0   |1      |2      |3      |4       |5 |6           |7           |8
 587                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 588                 JsonValue *jr = NewJsonObject(HKEY("room"));
 589
 590                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 591                 JsonObjectAppend(jr, NewJsonPlainString(HKEY("name"), roomname, -1));
 592
 593                 JsonObjectAppend(jr, NewJsonNumber(HKEY("floor"), extract_int(buf, 2)));
 594                 JsonObjectAppend(jr, NewJsonNumber(HKEY("rorder"), extract_int(buf, 3)));
 595
 596                 int ra = extract_int(buf, 5);
 597                 JsonObjectAppend(jr, NewJsonBool(HKEY("known"), (ra & UA_KNOWN)));
 598                 JsonObjectAppend(jr, NewJsonBool(HKEY("hasnewmsgs"), (ra & UA_HASNEWMSGS)));
 599
 600                 JsonObjectAppend(jr, NewJsonNumber(HKEY("current_view"), extract_int(buf, 6)));
 601                 JsonObjectAppend(jr, NewJsonNumber(HKEY("default_view"), extract_int(buf, 7)));
 602                 JsonObjectAppend(jr, NewJsonNumber(HKEY("mtime"), extract_int(buf, 8)));
 603
 604                 JsonArrayAppend(j, jr); // add the room to the array
 605         }
 606
 607         StrBuf *sj = NewStrBuf();
 608         SerializeJson(sj, j, 1);        // '1' == free the source array
 609
 610         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 611         h->response_code = 200;
 612         h->response_string = strdup("OK");
 613         h->response_body_length = StrLength(sj);
 614         h->response_body = SmashStrBuf(&sj);
 615 }
 616
 617
 618 // Dispatcher for paths starting with /ctdl/r/
 619 void ctdl_r(struct http_transaction *h, struct ctdlsession *c) {
 620         char requested_roomname[128];
 621         char buf[1024];
 622         long room_flags = 0;
 623         long room_flags2 = 0;
 624
 625         // All room-related functions require being "in" the room specified.  Are we in that room already?
 626         extract_token(requested_roomname, h->url, 3, '/', sizeof requested_roomname);
 627         unescape_input(requested_roomname);
 628
 629         if (IsEmptyStr(requested_roomname)) {   //      /ctdl/r/
 630                 room_list(h, c);
 631                 return;
 632         }
 633         // If not, try to go there.
 634         if (strcasecmp(requested_roomname, c->room)) {
 635                 ctdl_printf(c, "GOTO %s", requested_roomname);
 636                 ctdl_readline(c, buf, sizeof(buf));
 637                 if (buf[0] == '2') {
 638                         // buf[3] will indicate whether any instant messages are waiting
 639                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 640                         c->new_messages = extract_int(&buf[4], 1);
 641                         c->total_messages = extract_int(&buf[4], 2);
 642                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 643                         room_flags = extract_long(&buf[4], 3);          // Various flags associated with this room.
 644                         //      5       (long)CC->room.QRhighest        The highest message number present in this room
 645                         c->last_seen = extract_long(&buf[4], 6);        // The highest message number the user has read in this room
 646                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 647                         c->is_room_aide = extract_int(&buf[4], 8);
 648                         //      9                                       This position is no longer used
 649                         //      10      (int)CC->room.QRfloor           The floor number this room resides on
 650                         c->room_current_view = extract_int(&buf[4], 11);
 651                         c->room_default_view = extract_int(&buf[4], 12);
 652                         c->is_trash_folder  = extract_int(&buf[4], 13); // Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 653                         room_flags2 = extract_long(&buf[4], 14);        // More flags associated with this room.
 654                         c->room_mtime = extract_long(&buf[4], 15);      // Timestamp of the last write activity in this room
 655
 656                         // If any of these three conditions are met, let the client know it has permission to delete messages.
 657                         if ((c->is_room_aide) || (room_flags & QR_MAILBOX) || (room_flags2 & QR2_COLLABDEL)) {
 658                                 c->can_delete_messages = 1;
 659                         }
 660                         else {
 661                                 c->can_delete_messages = 0;
 662                         }
 663                 }
 664                 else {
 665                         do_404(h);
 666                         return;
 667                 }
 668         }
 669         // At this point our Citadel client session is "in" the specified room.
 670
 671         if (num_tokens(h->url, '/') == 4) {     //      /ctdl/r/roomname
 672                 the_room_itself(h, c);
 673                 return;
 674         }
 675
 676         extract_token(buf, h->url, 4, '/', sizeof buf);
 677         if (num_tokens(h->url, '/') == 5) {
 678                 if (IsEmptyStr(buf)) {
 679                         the_room_itself(h, c);  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 680                 }
 681                 else {
 682                         object_in_room(h, c);   //      /ctdl/r/roomname/object
 683                 }
 684                 return;
 685         }
 686         if (num_tokens(h->url, '/') >= 6) {
 687                 object_in_room(h, c);   //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 688                 return;
 689         }
 690         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 691         do_404(h);
 692 }