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