webcit-ng/server/room_functions.c

   1 // Room functions
   2 //
   3 // Copyright (c) 1996-2024 by the citadel.org team
   4 //
   5 // This program is open source software.  Use, duplication, or disclosure is subject to the GNU General Public License v3.
   6
   7 #include "webcit.h"
   8
   9
  10 // Return an array of message numbers in the current room.
  11 // Caller owns the memory and must free it.  Returns NULL if any problems.
  12 Array *get_msglist(struct ctdlsession *c, char *which_msgs) {
  13         char buf[1024];
  14         Array *msglist = NULL;
  15
  16         msglist = array_new(sizeof(long));
  17         if (msglist == NULL) {
  18                 return(NULL);
  19         }
  20
  21         ctdl_printf(c, "MSGS %s", which_msgs);
  22         ctdl_readline(c, buf, sizeof(buf));
  23         if (buf[0] == '1') {
  24                 while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
  25                         long m = atol(buf);
  26                         array_append(msglist, &m);
  27                 }
  28         }
  29
  30         return msglist;
  31 }
  32
  33
  34 // Supplied with a list of potential matches from an If-Match: or If-None-Match: header, and
  35 // a message number (which we always use as the entity tag in Citadel), return nonzero if the
  36 // message number matches any of the supplied tags in the string.
  37 int match_etags(char *taglist, long msgnum) {
  38         int num_tags = num_tokens(taglist, ',');
  39         int i = 0;
  40         char tag[1024];
  41
  42         if (msgnum <= 0) {                                      // no msgnum?  no match.
  43                 return (0);
  44         }
  45
  46         for (i = 0; i < num_tags; ++i) {
  47                 extract_token(tag, taglist, i, ',', sizeof tag);
  48                 string_trim(tag);
  49                 char *lq = (strchr(tag, '"'));
  50                 char *rq = (strrchr(tag, '"'));
  51                 if (lq < rq) {                                  // has two double quotes
  52                         strcpy(rq, "");
  53                         strcpy(tag, ++lq);
  54                 }
  55                 string_trim(tag);
  56                 if (!strcmp(tag, "*")) {                        // wildcard match
  57                         return (1);
  58                 }
  59                 long tagmsgnum = atol(tag);
  60                 if ((tagmsgnum > 0) && (tagmsgnum == msgnum)) { // match
  61                         return (1);
  62                 }
  63         }
  64
  65         return (0);                                             // no match
  66 }
  67
  68
  69 // Client is requesting a STAT (name and modification time) of the current room
  70 void json_stat(struct http_transaction *h, struct ctdlsession *c) {
  71         char buf[1024];
  72         char field[1024];
  73
  74         ctdl_printf(c, "STAT");
  75         ctdl_readline(c, buf, sizeof(buf));
  76         if (buf[0] == '2') {
  77                 JsonValue *j = NewJsonObject(HKEY("stat"));
  78                 extract_token(field, &buf[4], 0, '|', sizeof field);
  79                 JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), field, -1));
  80                 JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), extract_long(&buf[4], 1)));
  81
  82                 StrBuf *sj = NewStrBuf();
  83                 SerializeJson(sj, j, 1);                                // '1' == free the source array
  84                 add_response_header(h, strdup("Content-type"), strdup("application/json"));
  85                 h->response_code = 200;
  86                 h->response_string = strdup("OK");
  87                 h->response_body_length = StrLength(sj);
  88                 h->response_body = SmashStrBuf(&sj);
  89         }
  90         else {
  91                 do_404(h);
  92         }
  93         return;
  94 }
  95
  96
  97 // Client is requesting a mailbox summary of the current room
  98 void json_mailbox(struct http_transaction *h, struct ctdlsession *c) {
  99         char buf[1024];
 100         char field[1024];
 101         JsonValue *j = NewJsonArray(HKEY("msgs"));
 102
 103         ctdl_printf(c, "MSGS ALL|||9");                         // "9" as the fourth parameter delivers a mailbox summary
 104         ctdl_readline(c, buf, sizeof(buf));
 105         if (buf[0] == '1') {
 106                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))) {
 107                         JsonValue *jmsg = NewJsonObject(HKEY("message"));
 108                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgnum"), extract_long(buf, 0)));
 109                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("time"), extract_long(buf, 1)));
 110                         extract_token(field, buf, 2, '|', sizeof field);
 111                         utf8ify_rfc822_string(field);
 112                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("author"), field, -1));
 113                         extract_token(field, buf, 4, '|', sizeof field);
 114                         utf8ify_rfc822_string(field);
 115                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("addr"), field, -1));
 116                         extract_token(field, buf, 5, '|', sizeof field);
 117                         utf8ify_rfc822_string(field);
 118                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("subject"), field, -1));
 119                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgidhash"), extract_long(buf, 6)));
 120                         extract_token(field, buf, 7, '|', sizeof field);
 121                         utf8ify_rfc822_string(field);
 122                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("references"), field, -1));
 123                         JsonArrayAppend(j, jmsg);               // add the message to the array
 124                 }
 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 a message list
 140 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which) {
 141         int i = 0;
 142         Array *msglist = get_msglist(c, which);
 143         JsonValue *j = NewJsonArray(HKEY("msgs"));
 144
 145         if (msglist != NULL) {
 146                 for (i = 0; i < array_len(msglist); ++i) {
 147                         long m;
 148                         memcpy(&m, array_get_element_at(msglist, i), sizeof(long));
 149                         JsonArrayAppend(j, NewJsonNumber(HKEY("m"), m));
 150                 }
 151                 array_free(msglist);
 152         }
 153
 154         StrBuf *sj = NewStrBuf();
 155         SerializeJson(sj, j, 1);                                // '1' == free the source array
 156
 157         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 158         h->response_code = 200;
 159         h->response_string = strdup("OK");
 160         h->response_body_length = StrLength(sj);
 161         h->response_body = SmashStrBuf(&sj);
 162         return;
 163 }
 164
 165
 166 // Client is requesting the room info banner
 167 void read_room_info_banner(struct http_transaction *h, struct ctdlsession *c) {
 168         char buf[1024];
 169
 170         ctdl_printf(c, "RINF");
 171         ctdl_readline(c, buf, sizeof(buf));
 172         if (buf[0] == '1') {
 173                 StrBuf *info = NewStrBuf();
 174                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))){
 175                         StrBufAppendPrintf(info, "%s\n", buf);
 176                 }
 177                 add_response_header(h, strdup("Content-type"), strdup("text/plain"));
 178                 h->response_code = 200;
 179                 h->response_string = strdup("OK");
 180                 h->response_body_length = StrLength(info);
 181                 h->response_body = SmashStrBuf(&info);
 182                 return;
 183         }
 184         else {
 185                 do_404(h);
 186         }
 187 }
 188
 189
 190 // Client is setting the "Last Read Pointer" (marking all messages as "seen" up to this message)
 191 void set_last_read_pointer(struct http_transaction *h, struct ctdlsession *c) {
 192         char cbuf[1024];
 193         ctdl_printf(c, "SLRP %d", atoi(get_url_param(h, "last")));
 194         ctdl_readline(c, cbuf, sizeof(cbuf));
 195         if (cbuf[0] == '2') {
 196                 do_204(h);
 197         }
 198         else {
 199                 do_404(h);
 200         }
 201 }
 202
 203
 204 // Client requested an object in a room.
 205 void object_in_room(struct http_transaction *h, struct ctdlsession *c) {
 206         char buf[1024];
 207         long msgnum = (-1);
 208         char unescaped_euid[1024];
 209
 210         extract_token(buf, h->url, 4, '/', sizeof buf);
 211
 212         if (!strcasecmp(buf, "mailbox")) {              // Client is requesting a mailbox summary
 213                 json_mailbox(h, c);
 214                 return;
 215         }
 216
 217         if (!strcasecmp(buf, "stat")) {                 // Client is requesting a stat command (name and modification time)
 218                 json_stat(h, c);
 219                 return;
 220         }
 221
 222         if (!strncasecmp(buf, "msgs.", 5)) {            // Client is requesting a list of message numbers
 223                 unescape_input(&buf[5]);
 224                 json_msglist(h, c, &buf[5]);
 225                 return;
 226         }
 227
 228         if (!strcasecmp(buf, "info.txt")) {             // Client is requesting the room info banner
 229                 read_room_info_banner(h, c);
 230                 return;
 231         }
 232
 233         if (!strcasecmp(buf, "slrp")) {                 // Set the Last Read Pointer
 234                 set_last_read_pointer(h, c);
 235                 return;
 236         }
 237
 238         // If we get to this point, the client is requesting a specific object *in* the room.
 239
 240         if ((c->room_default_view == VIEW_CALENDAR)     // room types where objects are referenced by EUID
 241            || (c->room_default_view == VIEW_TASKS)
 242            || (c->room_default_view == VIEW_ADDRESSBOOK)
 243            ) {
 244                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 245                 unescape_input(unescaped_euid);
 246                 msgnum = locate_message_by_uid(c, unescaped_euid);
 247         }
 248         else {                                          // otherwise the object is being referenced by message number
 249                 msgnum = atol(buf);
 250         }
 251
 252         // All methods except PUT require the message to already exist
 253         if ((msgnum <= 0) && (strcasecmp(h->method, "PUT"))) {
 254                 do_404(h);
 255         }
 256
 257         // If we get to this point we have a valid message number in an accessible room.
 258         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 259
 260         // A sixth component in the URL can be one of two things:
 261         // (1) a MIME part specifier, in which case the client wants to download that component within the message
 262         // (2) a content-type, in which ase the client wants us to try to render it a certain way
 263         if (num_tokens(h->url, '/') >= 6) {
 264                 extract_token(buf, h->url, 5, '/', sizeof buf);
 265                 if (!IsEmptyStr(buf)) {
 266                         if (!strcasecmp(buf, "json")) {
 267                                 json_render_one_message(h, c, msgnum);
 268                         }
 269                         else {
 270                                 download_mime_component(h, c, msgnum, buf);
 271                         }
 272                         return;
 273                 }
 274         }
 275
 276         // Ok, we want a full message, but first let's check for the if[-none]-match headers.
 277         char *if_match = header_val(h, "If-Match");
 278         if ((if_match != NULL) && (!match_etags(if_match, msgnum))) {
 279                 do_412(h);
 280                 return;
 281         }
 282
 283         char *if_none_match = header_val(h, "If-None-Match");
 284         if ((if_none_match != NULL) && (match_etags(if_none_match, msgnum))) {
 285                 do_412(h);
 286                 return;
 287         }
 288
 289         // Now perform the requested operation.
 290         if (!strcasecmp(h->method, "DELETE")) {
 291                 dav_delete_message(h, c, msgnum);
 292         }
 293         else if (!strcasecmp(h->method, "GET")) {
 294                 dav_get_message(h, c, msgnum);
 295         }
 296         else if (!strcasecmp(h->method, "PUT")) {
 297                 dav_put_message(h, c, unescaped_euid, msgnum);
 298         }
 299         else if (!strcasecmp(h->method, "MOVE")) {
 300                 dav_move_or_copy_message(h, c, msgnum, DAV_MOVE);
 301         }
 302         else if (!strcasecmp(h->method, "COPY")) {
 303                 dav_move_or_copy_message(h, c, msgnum, DAV_COPY);
 304         }
 305         else {
 306                 do_404(h);              // We should never get here, but if we do, a 404 error is clean.
 307         }
 308 }
 309
 310
 311 // Called by the_room_itself() when the HTTP method is REPORT
 312 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 313         if (c->room_default_view == VIEW_CALENDAR) {
 314                 caldav_report(h, c);    // CalDAV REPORTs ... fmgwac
 315                 return;
 316         }
 317
 318         do_404(h);                      // future implementations like CardDAV will require code paths here
 319 }
 320
 321
 322 // Called by the_room_itself() when the HTTP method is OPTIONS
 323 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 324         h->response_code = 200;
 325         h->response_string = strdup("OK");
 326         if (c->room_default_view == VIEW_CALENDAR) {
 327                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 328         }
 329         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 330                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 331         }
 332         else {
 333                 add_response_header(h, strdup("DAV"), strdup("1"));     // ordinary WebDAV for all other room types
 334         }
 335         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE, MOVE, COPY"));
 336 }
 337
 338
 339 // Called by the_room_itself() when the HTTP method is PROPFIND
 340 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 341         char *e;
 342         long timestamp;
 343         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 344         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 345         StrBuf *Buf = NewStrBuf();
 346
 347         StrBufAppendPrintf(Buf,
 348                 "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 349                 "<D:multistatus "
 350                 "xmlns:D=\"DAV:\" "
 351                 "xmlns:C=\"urn:ietf:params:xml:ns:caldav\""
 352                 ">"
 353         );
 354
 355         // Transmit the collection resource
 356         StrBufAppendPrintf(Buf, "<D:response>");
 357         StrBufAppendPrintf(Buf, "<D:href>");
 358         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 359         StrBufAppendPrintf(Buf, "/ctdl/r/");
 360         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 361         StrBufAppendPrintf(Buf, "</D:href>");
 362
 363         StrBufAppendPrintf(Buf, "<D:propstat>");
 364         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 365         StrBufAppendPrintf(Buf, "<D:prop>");
 366         StrBufAppendPrintf(Buf, "<D:displayname>");
 367         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 368         StrBufAppendPrintf(Buf, "</D:displayname>");
 369
 370         StrBufAppendPrintf(Buf, "<D:owner />"); // empty owner ought to be legal; see rfc3744 section 5.1
 371
 372         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 373         switch (c->room_default_view) {
 374         case VIEW_CALENDAR:
 375                 StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 376                 break;
 377         }
 378         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 379
 380         int enumerate_by_euid = 0;      // nonzero if messages will be retrieved by euid instead of msgnum
 381         switch (c->room_default_view) {
 382         case VIEW_CALENDAR:             // RFC4791 section 5.2
 383                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></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_TASKS:                // RFC4791 section 5.2
 390                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 391                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 392                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 393                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 394                 enumerate_by_euid = 1;
 395                 break;
 396         case VIEW_ADDRESSBOOK:          // FIXME put some sort of CardDAV crapola here when we implement it
 397                 enumerate_by_euid = 1;
 398                 break;
 399         case VIEW_WIKI:                 // FIXME invent "WikiDAV" ?  The versioning stuff in DAV could be useful.
 400                 enumerate_by_euid = 1;
 401                 break;
 402         }
 403
 404         // FIXME get the mtime
 405         // StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 406         // escputs(datestring);
 407         // StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 408
 409         StrBufAppendPrintf(Buf, "</D:prop>");
 410         StrBufAppendPrintf(Buf, "</D:propstat>");
 411         StrBufAppendPrintf(Buf, "</D:response>\n");
 412
 413         // If a depth greater than zero was specified, transmit the collection listing
 414         // BEGIN COLLECTION
 415         if (dav_depth > 0) {
 416                 Array *msglist = get_msglist(c, "ALL");
 417                 if (msglist) {
 418                         int i;
 419                         for (i = 0; i < array_len(msglist); ++i) {
 420                                 if ((i % 10) == 0) {
 421                                         syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 422                                 }
 423                                 e = NULL;               // EUID gets stored here
 424                                 timestamp = 0;
 425
 426                                 long m;
 427                                 memcpy(&m, array_get_element_at(msglist, i), sizeof(long));
 428
 429                                 char cbuf[1024];
 430                                 ctdl_printf(c, "MSG0 %ld|3", m);
 431                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 432                                 if (cbuf[0] == '1')
 433                                         while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 434                                                 if ((enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5))) {
 435                                                         // e = strdup(&cbuf[5]);
 436                                                         int elen = (2 * strlen(&cbuf[5]));
 437                                                         e = malloc(elen);
 438                                                         urlesc(e, elen, &cbuf[5]);
 439                                                 }
 440                                                 if (!strncasecmp(cbuf, "time=", 5)) {
 441                                                         timestamp = atol(&cbuf[5]);
 442                                                 }
 443                                         }
 444                                 if (e == NULL) {
 445                                         e = malloc(20);
 446                                         sprintf(e, "%ld", m);
 447                                 }
 448                                 StrBufAppendPrintf(Buf, "<D:response>");
 449
 450                                 // Generate the 'href' tag for this message
 451                                 StrBufAppendPrintf(Buf, "<D:href>");
 452                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 453                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 454                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 455                                 StrBufAppendPrintf(Buf, "/");
 456                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 457                                 StrBufAppendPrintf(Buf, "</D:href>");
 458                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 459                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 460                                 StrBufAppendPrintf(Buf, "<D:prop>");
 461
 462                                 switch (c->room_default_view) {
 463                                 case VIEW_CALENDAR:
 464                                         StrBufAppendPrintf(Buf,
 465                                                            "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 466                                         break;
 467                                 case VIEW_TASKS:
 468                                         StrBufAppendPrintf(Buf,
 469                                                            "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 470                                         break;
 471                                 case VIEW_ADDRESSBOOK:
 472                                         StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 473                                         break;
 474                                 }
 475
 476                                 if (timestamp > 0) {
 477                                         char *datestring = http_datestring(timestamp);
 478                                         if (datestring) {
 479                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 480                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 481                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 482                                                 free(datestring);
 483                                         }
 484                                         if (enumerate_by_euid) {        // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
 485                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", m);
 486                                         }
 487                                 }
 488                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 489                                 free(e);
 490                         }
 491                         array_free(msglist);
 492                 };
 493         }
 494         // END COLLECTION
 495
 496         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 497
 498         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 499         h->response_code = 207;
 500         h->response_string = strdup("Multi-Status");
 501         h->response_body_length = StrLength(Buf);
 502         h->response_body = SmashStrBuf(&Buf);
 503 }
 504
 505 // some good examples here
 506 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 507
 508
 509 // Called by the_room_itself() when the HTTP method is PROPFIND
 510 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 511         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 512
 513         JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), c->room, -1));
 514         JsonObjectAppend(j, NewJsonNumber(HKEY("current_view"), c->room_current_view));
 515         JsonObjectAppend(j, NewJsonNumber(HKEY("default_view"), c->room_default_view));
 516         JsonObjectAppend(j, NewJsonNumber(HKEY("is_room_aide"), c->is_room_aide));
 517         JsonObjectAppend(j, NewJsonNumber(HKEY("is_trash_folder"), c->is_trash_folder));
 518         JsonObjectAppend(j, NewJsonNumber(HKEY("can_delete_messages"), c->can_delete_messages));
 519         JsonObjectAppend(j, NewJsonNumber(HKEY("new_messages"), c->new_messages));
 520         JsonObjectAppend(j, NewJsonNumber(HKEY("total_messages"), c->total_messages));
 521         JsonObjectAppend(j, NewJsonNumber(HKEY("last_seen"), c->last_seen));
 522         JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), c->room_mtime));
 523
 524         StrBuf *sj = NewStrBuf();
 525         SerializeJson(sj, j, 1);        // '1' == free the source array
 526
 527         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 528         h->response_code = 200;
 529         h->response_string = strdup("OK");
 530         h->response_body_length = StrLength(sj);
 531         h->response_body = SmashStrBuf(&sj);
 532         return;
 533 }
 534
 535
 536 // Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 537 // or /ctdl/r/roomname/ but *not* specific objects within the room)
 538 void the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 539
 540         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 541         if (!strcasecmp(h->method, "OPTIONS")) {
 542                 options_the_room_itself(h, c);
 543                 return;
 544         }
 545
 546         // PROPFIND method on the room itself could be looking for a directory
 547         if (!strcasecmp(h->method, "PROPFIND")) {
 548                 propfind_the_room_itself(h, c);
 549                 return;
 550         }
 551
 552         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 553         if (!strcasecmp(h->method, "REPORT")) {
 554                 report_the_room_itself(h, c);
 555                 return;
 556         }
 557
 558         // GET method on the room itself is an API call, possibly from our JavaScript front end
 559         if (!strcasecmp(h->method, "get")) {
 560                 get_the_room_itself(h, c);
 561                 return;
 562         }
 563
 564         // we probably want a "go to this room" for interactive access
 565         do_404(h);
 566 }
 567
 568
 569 // Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 570 void room_list(struct http_transaction *h, struct ctdlsession *c) {
 571         char buf[1024];
 572         char roomname[1024];
 573
 574         ctdl_printf(c, "LKRA");
 575         ctdl_readline(c, buf, sizeof(buf));
 576         if (buf[0] != '1') {
 577                 do_502(h);
 578                 return;
 579         }
 580
 581         JsonValue *j = NewJsonArray(HKEY("lkra"));
 582         while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
 583
 584                 // 0   |1      |2      |3      |4       |5 |6           |7           |8
 585                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 586                 JsonValue *jr = NewJsonObject(HKEY("room"));
 587
 588                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 589                 JsonObjectAppend(jr, NewJsonPlainString(HKEY("name"), roomname, -1));
 590
 591                 JsonObjectAppend(jr, NewJsonNumber(HKEY("floor"), extract_int(buf, 2)));
 592                 JsonObjectAppend(jr, NewJsonNumber(HKEY("rorder"), extract_int(buf, 3)));
 593
 594                 int ra = extract_int(buf, 5);
 595                 JsonObjectAppend(jr, NewJsonBool(HKEY("known"), (ra & UA_KNOWN)));
 596                 JsonObjectAppend(jr, NewJsonBool(HKEY("hasnewmsgs"), (ra & UA_HASNEWMSGS)));
 597
 598                 JsonObjectAppend(jr, NewJsonNumber(HKEY("current_view"), extract_int(buf, 6)));
 599                 JsonObjectAppend(jr, NewJsonNumber(HKEY("default_view"), extract_int(buf, 7)));
 600                 JsonObjectAppend(jr, NewJsonNumber(HKEY("mtime"), extract_int(buf, 8)));
 601
 602                 JsonArrayAppend(j, jr); // add the room to the array
 603         }
 604
 605         StrBuf *sj = NewStrBuf();
 606         SerializeJson(sj, j, 1);        // '1' == free the source array
 607
 608         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 609         h->response_code = 200;
 610         h->response_string = strdup("OK");
 611         h->response_body_length = StrLength(sj);
 612         h->response_body = SmashStrBuf(&sj);
 613 }
 614
 615
 616 // Dispatcher for paths starting with /ctdl/r/
 617 void ctdl_r(struct http_transaction *h, struct ctdlsession *c) {
 618         char requested_roomname[128];
 619         char buf[1024];
 620         long room_flags = 0;
 621         long room_flags2 = 0;
 622
 623         // All room-related functions require being "in" the room specified.  Are we in that room already?
 624         extract_token(requested_roomname, h->url, 3, '/', sizeof requested_roomname);
 625         unescape_input(requested_roomname);
 626
 627         if (IsEmptyStr(requested_roomname)) {   //      /ctdl/r/
 628                 room_list(h, c);
 629                 return;
 630         }
 631         // If not, try to go there.
 632         if (strcasecmp(requested_roomname, c->room)) {
 633                 ctdl_printf(c, "GOTO %s", requested_roomname);
 634                 ctdl_readline(c, buf, sizeof(buf));
 635                 if (buf[0] == '2') {
 636                         // buf[3] will indicate whether any instant messages are waiting
 637                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 638                         c->new_messages = extract_int(&buf[4], 1);
 639                         c->total_messages = extract_int(&buf[4], 2);
 640                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 641                         room_flags = extract_long(&buf[4], 3);          // Various flags associated with this room.
 642                         //      5       (long)CC->room.QRhighest        The highest message number present in this room
 643                         c->last_seen = extract_long(&buf[4], 6);        // The highest message number the user has read in this room
 644                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 645                         c->is_room_aide = extract_int(&buf[4], 8);
 646                         //      9                                       This position is no longer used
 647                         //      10      (int)CC->room.QRfloor           The floor number this room resides on
 648                         c->room_current_view = extract_int(&buf[4], 11);
 649                         c->room_default_view = extract_int(&buf[4], 12);
 650                         c->is_trash_folder  = extract_int(&buf[4], 13); // Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 651                         room_flags2 = extract_long(&buf[4], 14);        // More flags associated with this room.
 652                         c->room_mtime = extract_long(&buf[4], 15);      // Timestamp of the last write activity in this room
 653
 654                         // If any of these three conditions are met, let the client know it has permission to delete messages.
 655                         if ((c->is_room_aide) || (room_flags & QR_MAILBOX) || (room_flags2 & QR2_COLLABDEL)) {
 656                                 c->can_delete_messages = 1;
 657                         }
 658                         else {
 659                                 c->can_delete_messages = 0;
 660                         }
 661                 }
 662                 else {
 663                         do_404(h);
 664                         return;
 665                 }
 666         }
 667         // At this point our Citadel client session is "in" the specified room.
 668
 669         if (num_tokens(h->url, '/') == 4) {     //      /ctdl/r/roomname
 670                 the_room_itself(h, c);
 671                 return;
 672         }
 673
 674         extract_token(buf, h->url, 4, '/', sizeof buf);
 675         if (num_tokens(h->url, '/') == 5) {
 676                 if (IsEmptyStr(buf)) {
 677                         the_room_itself(h, c);  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 678                 }
 679                 else {
 680                         object_in_room(h, c);   //      /ctdl/r/roomname/object
 681                 }
 682                 return;
 683         }
 684         if (num_tokens(h->url, '/') >= 6) {
 685                 object_in_room(h, c);   //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 686                 return;
 687         }
 688         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 689         do_404(h);
 690 }