webcit-ng/room_functions.c

   1 // Room functions
   2 //
   3 // Copyright (c) 1996-2022 by the citadel.org team
   4 //
   5 // This program is open source software.  Use, duplication, or
   6 // disclosure are subject to the GNU General Public License v3.
   7
   8 #include "webcit.h"
   9
  10
  11 // Return a "zero-terminated" array of message numbers in the current room.
  12 // Caller owns the memory and must free it.  Returns NULL if any problems.
  13 long *get_msglist(struct ctdlsession *c, char *which_msgs) {
  14         char buf[1024];
  15         long *msglist = NULL;
  16         int num_msgs = 0;
  17         int num_alloc = 0;
  18
  19         ctdl_printf(c, "MSGS %s", which_msgs);
  20         ctdl_readline(c, buf, sizeof(buf));
  21         if (buf[0] == '1') {
  22                 do {
  23                         if (num_msgs >= num_alloc) {
  24                                 if (num_alloc == 0) {
  25                                         num_alloc = 1024;
  26                                         msglist = malloc(num_alloc * sizeof(long));
  27                                 }
  28                                 else {
  29                                         num_alloc *= 2;
  30                                         msglist = realloc(msglist, num_alloc * sizeof(long));
  31                                 }
  32                         }
  33                         ctdl_readline(c, buf, sizeof(buf));
  34                         msglist[num_msgs++] = atol(buf);
  35                 } while (strcmp(buf, "000"));   // this makes the last element a "0" terminator
  36         }
  37         return msglist;
  38 }
  39
  40
  41 // Supplied with a list of potential matches from an If-Match: or If-None-Match: header, and
  42 // a message number (which we always use as the entity tag in Citadel), return nonzero if the
  43 // message number matches any of the supplied tags in the string.
  44 int match_etags(char *taglist, long msgnum) {
  45         int num_tags = num_tokens(taglist, ',');
  46         int i = 0;
  47         char tag[1024];
  48
  49         if (msgnum <= 0) {                                      // no msgnum?  no match.
  50                 return (0);
  51         }
  52
  53         for (i = 0; i < num_tags; ++i) {
  54                 extract_token(tag, taglist, i, ',', sizeof tag);
  55                 striplt(tag);
  56                 char *lq = (strchr(tag, '"'));
  57                 char *rq = (strrchr(tag, '"'));
  58                 if (lq < rq) {                                  // has two double quotes
  59                         strcpy(rq, "");
  60                         strcpy(tag, ++lq);
  61                 }
  62                 striplt(tag);
  63                 if (!strcmp(tag, "*")) {                        // wildcard match
  64                         return (1);
  65                 }
  66                 long tagmsgnum = atol(tag);
  67                 if ((tagmsgnum > 0) && (tagmsgnum == msgnum)) { // match
  68                         return (1);
  69                 }
  70         }
  71
  72         return (0);                                             // no match
  73 }
  74
  75
  76 // Client is requesting a 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         syslog(LOG_DEBUG, "%s", buf);
  84         if (buf[0] == '2') {
  85                 JsonValue *j = NewJsonObject(HKEY("stat"));
  86                 extract_token(field, &buf[4], 0, '|', sizeof field);
  87                 JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), field, -1));
  88                 JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), extract_long(&buf[4], 1)));
  89
  90                 StrBuf *sj = NewStrBuf();
  91                 SerializeJson(sj, j, 1);                                // '1' == free the source array
  92                 add_response_header(h, strdup("Content-type"), strdup("application/json"));
  93                 h->response_code = 200;
  94                 h->response_string = strdup("OK");
  95                 h->response_body_length = StrLength(sj);
  96                 h->response_body = SmashStrBuf(&sj);
  97         }
  98         else {
  99                 do_404(h);
 100         }
 101         return;
 102 }
 103
 104
 105 // Client is requesting a mailbox summary of the current room
 106 void json_mailbox(struct http_transaction *h, struct ctdlsession *c) {
 107         char buf[1024];
 108         char field[1024];
 109         JsonValue *j = NewJsonArray(HKEY("msgs"));
 110
 111         ctdl_printf(c, "MSGS ALL|||9");                         // "9" as the fourth parameter delivers a mailbox summary
 112         ctdl_readline(c, buf, sizeof(buf));
 113         if (buf[0] == '1') {
 114                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))) {
 115                         utf8ify_rfc822_string(buf);
 116                         JsonValue *jmsg = NewJsonObject(HKEY("message"));
 117                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgnum"), extract_long(buf, 0)));
 118                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("time"), extract_long(buf, 1)));
 119                         extract_token(field, buf, 2, '|', sizeof field);
 120                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("author"), field, -1));
 121                         extract_token(field, buf, 4, '|', sizeof field);
 122                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("addr"), field, -1));
 123                         extract_token(field, buf, 5, '|', sizeof field);
 124                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("subject"), field, -1));
 125                         JsonObjectAppend(jmsg, NewJsonNumber(HKEY("msgidhash"), extract_long(buf, 6)));
 126                         extract_token(field, buf, 7, '|', sizeof field);
 127                         JsonObjectAppend(jmsg, NewJsonPlainString(HKEY("references"), field, -1));
 128                         JsonArrayAppend(j, jmsg);               // add the message to the array
 129                 }
 130         }
 131
 132         StrBuf *sj = NewStrBuf();
 133         SerializeJson(sj, j, 1);                                // '1' == free the source array
 134
 135         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 136         h->response_code = 200;
 137         h->response_string = strdup("OK");
 138         h->response_body_length = StrLength(sj);
 139         h->response_body = SmashStrBuf(&sj);
 140         return;
 141 }
 142
 143
 144 // Client is requesting a message list
 145 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which) {
 146         int i = 0;
 147         long *msglist = get_msglist(c, which);
 148         JsonValue *j = NewJsonArray(HKEY("msgs"));
 149
 150         if (msglist != NULL) {
 151                 for (i = 0; msglist[i] > 0; ++i) {
 152                         JsonArrayAppend(j, NewJsonNumber(HKEY("m"), msglist[i]));
 153                 }
 154                 free(msglist);
 155         }
 156
 157         StrBuf *sj = NewStrBuf();
 158         SerializeJson(sj, j, 1);                                // '1' == free the source array
 159
 160         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 161         h->response_code = 200;
 162         h->response_string = strdup("OK");
 163         h->response_body_length = StrLength(sj);
 164         h->response_body = SmashStrBuf(&sj);
 165         return;
 166 }
 167
 168
 169 // Client is requesting the room info banner
 170 void read_room_info_banner(struct http_transaction *h, struct ctdlsession *c) {
 171         char buf[1024];
 172
 173         ctdl_printf(c, "RINF");
 174         ctdl_readline(c, buf, sizeof(buf));
 175         if (buf[0] == '1') {
 176                 StrBuf *info = NewStrBuf();
 177                 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))){
 178                         StrBufAppendPrintf(info, "%s\n", buf);
 179                 }
 180                 add_response_header(h, strdup("Content-type"), strdup("text/plain"));
 181                 h->response_code = 200;
 182                 h->response_string = strdup("OK");
 183                 h->response_body_length = StrLength(info);
 184                 h->response_body = SmashStrBuf(&info);
 185                 return;
 186         }
 187         else {
 188                 do_404(h);
 189         }
 190 }
 191
 192
 193 // Client is setting the "Last Read Pointer" (marking all messages as "seen" up to this message)
 194 void set_last_read_pointer(struct http_transaction *h, struct ctdlsession *c) {
 195         char cbuf[1024];
 196         ctdl_printf(c, "SLRP %d", atoi(get_url_param(h, "last")));
 197         ctdl_readline(c, cbuf, sizeof(cbuf));
 198         if (cbuf[0] == '2') {
 199                 do_204(h);
 200         }
 201         else {
 202                 do_404(h);
 203         }
 204 }
 205
 206
 207 // Client requested an object in a room.
 208 void object_in_room(struct http_transaction *h, struct ctdlsession *c) {
 209         char buf[1024];
 210         long msgnum = (-1);
 211         char unescaped_euid[1024];
 212
 213         extract_token(buf, h->url, 4, '/', sizeof buf);
 214
 215         if (!strcasecmp(buf, "mailbox")) {              // Client is requesting a mailbox summary
 216                 json_mailbox(h, c);
 217                 return;
 218         }
 219
 220         if (!strcasecmp(buf, "stat")) {                 // Client is requesting a stat command (name and modification time)
 221                 json_stat(h, c);
 222                 return;
 223         }
 224
 225         if (!strncasecmp(buf, "msgs.", 5)) {            // Client is requesting a list of message numbers
 226                 unescape_input(&buf[5]);
 227                 json_msglist(h, c, &buf[5]);
 228                 return;
 229         }
 230
 231         if (!strcasecmp(buf, "info.txt")) {             // Client is requesting the room info banner
 232                 read_room_info_banner(h, c);
 233                 return;
 234         }
 235
 236         if (!strcasecmp(buf, "slrp")) {                 // Set the Last Read Pointer
 237                 set_last_read_pointer(h, c);
 238                 return;
 239         }
 240
 241         // If we get to this point, the client is requesting a specific object *in* the room.
 242
 243         if ((c->room_default_view == VIEW_CALENDAR)     // room types where objects are referenced by EUID
 244            || (c->room_default_view == VIEW_TASKS)
 245            || (c->room_default_view == VIEW_ADDRESSBOOK)
 246            ) {
 247                 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
 248                 unescape_input(unescaped_euid);
 249                 msgnum = locate_message_by_uid(c, unescaped_euid);
 250         }
 251         else {                                          // otherwise the object is being referenced by message number
 252                 msgnum = atol(buf);
 253         }
 254
 255         // All methods except PUT require the message to already exist
 256         if ((msgnum <= 0) && (strcasecmp(h->method, "PUT"))) {
 257                 do_404(h);
 258         }
 259
 260         // If we get to this point we have a valid message number in an accessible room.
 261         syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
 262
 263         // A sixth component in the URL can be one of two things:
 264         // (1) a MIME part specifier, in which case the client wants to download that component within the message
 265         // (2) a content-type, in which ase the client wants us to try to render it a certain way
 266         if (num_tokens(h->url, '/') == 6) {
 267                 extract_token(buf, h->url, 5, '/', sizeof buf);
 268                 if (!IsEmptyStr(buf)) {
 269                         if (!strcasecmp(buf, "json")) {
 270                                 json_render_one_message(h, c, msgnum);
 271                         }
 272                         else {
 273                                 download_mime_component(h, c, msgnum, buf);
 274                         }
 275                         return;
 276                 }
 277         }
 278
 279         // Ok, we want a full message, but first let's check for the if[-none]-match headers.
 280         char *if_match = header_val(h, "If-Match");
 281         if ((if_match != NULL) && (!match_etags(if_match, msgnum))) {
 282                 do_412(h);
 283                 return;
 284         }
 285
 286         char *if_none_match = header_val(h, "If-None-Match");
 287         if ((if_none_match != NULL) && (match_etags(if_none_match, msgnum))) {
 288                 do_412(h);
 289                 return;
 290         }
 291
 292         // DOOOOOO ITTTTT!!!
 293
 294         if (!strcasecmp(h->method, "DELETE")) {
 295                 dav_delete_message(h, c, msgnum);
 296         }
 297         else if (!strcasecmp(h->method, "GET")) {
 298                 dav_get_message(h, c, msgnum);
 299         }
 300         else if (!strcasecmp(h->method, "PUT")) {
 301                 dav_put_message(h, c, unescaped_euid, msgnum);
 302         }
 303         else {
 304                 do_404(h);      // Got this far but the method made no sense?  Bummer.
 305         }
 306
 307 }
 308
 309
 310 // Called by the_room_itself() when the HTTP method is REPORT
 311 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 312         if (c->room_default_view == VIEW_CALENDAR) {
 313                 caldav_report(h, c);    // CalDAV REPORTs ... fmgwac
 314                 return;
 315         }
 316
 317         do_404(h);              // future implementations like CardDAV will require code paths here
 318 }
 319
 320
 321 // Called by the_room_itself() when the HTTP method is OPTIONS
 322 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 323         h->response_code = 200;
 324         h->response_string = strdup("OK");
 325         if (c->room_default_view == VIEW_CALENDAR) {
 326                 add_response_header(h, strdup("DAV"), strdup("1, calendar-access"));    // offer CalDAV
 327         }
 328         else if (c->room_default_view == VIEW_ADDRESSBOOK) {
 329                 add_response_header(h, strdup("DAV"), strdup("1, addressbook"));        // offer CardDAV
 330         }
 331         else {
 332                 add_response_header(h, strdup("DAV"), strdup("1"));     // ordinary WebDAV for all other room types
 333         }
 334         add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE"));
 335 }
 336
 337
 338 // Called by the_room_itself() when the HTTP method is PROPFIND
 339 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 340         char *e;
 341         long timestamp;
 342         int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
 343         syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
 344         StrBuf *Buf = NewStrBuf();
 345
 346         StrBufAppendPrintf(Buf, "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
 347                            "<D:multistatus " "xmlns:D=\"DAV:\" " "xmlns:C=\"urn:ietf:params:xml:ns:caldav\"" ">");
 348
 349         // Transmit the collection resource
 350         StrBufAppendPrintf(Buf, "<D:response>");
 351         StrBufAppendPrintf(Buf, "<D:href>");
 352         StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 353         StrBufAppendPrintf(Buf, "/ctdl/r/");
 354         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 355         StrBufAppendPrintf(Buf, "</D:href>");
 356
 357         StrBufAppendPrintf(Buf, "<D:propstat>");
 358         StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 359         StrBufAppendPrintf(Buf, "<D:prop>");
 360         StrBufAppendPrintf(Buf, "<D:displayname>");
 361         StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 362         StrBufAppendPrintf(Buf, "</D:displayname>");
 363
 364         StrBufAppendPrintf(Buf, "<D:owner />"); // empty owner ought to be legal; see rfc3744 section 5.1
 365
 366         StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
 367         switch (c->room_default_view) {
 368         case VIEW_CALENDAR:
 369                 StrBufAppendPrintf(Buf, "<C:calendar />");      // RFC4791 section 4.2
 370                 break;
 371         }
 372         StrBufAppendPrintf(Buf, "</D:resourcetype>");
 373
 374         int enumerate_by_euid = 0;      // nonzero if messages will be retrieved by euid instead of msgnum
 375         switch (c->room_default_view) {
 376         case VIEW_CALENDAR:             // RFC4791 section 5.2
 377                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
 378                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 379                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 380                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 381                 enumerate_by_euid = 1;
 382                 break;
 383         case VIEW_TASKS:                // RFC4791 section 5.2
 384                 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
 385                 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
 386                 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
 387                 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
 388                 enumerate_by_euid = 1;
 389                 break;
 390         case VIEW_ADDRESSBOOK:          // FIXME put some sort of CardDAV crapola here when we implement it
 391                 enumerate_by_euid = 1;
 392                 break;
 393         case VIEW_WIKI:                 // FIXME invent "WikiDAV" ?  The versioning stuff in DAV could be useful.
 394                 enumerate_by_euid = 1;
 395                 break;
 396         }
 397
 398         // FIXME get the mtime
 399         // StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 400         // escputs(datestring);
 401         // StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 402
 403         StrBufAppendPrintf(Buf, "</D:prop>");
 404         StrBufAppendPrintf(Buf, "</D:propstat>");
 405         StrBufAppendPrintf(Buf, "</D:response>\n");
 406
 407         // If a depth greater than zero was specified, transmit the collection listing
 408         // BEGIN COLLECTION
 409         if (dav_depth > 0) {
 410                 long *msglist = get_msglist(c, "ALL");
 411                 if (msglist) {
 412                         int i;
 413                         for (i = 0; (msglist[i] > 0); ++i) {
 414                                 if ((i % 10) == 0)
 415                                         syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
 416                                 e = NULL;       // EUID gets stored here
 417                                 timestamp = 0;
 418
 419                                 char cbuf[1024];
 420                                 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
 421                                 ctdl_readline(c, cbuf, sizeof(cbuf));
 422                                 if (cbuf[0] == '1')
 423                                         while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
 424                                                 if ((enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5))) {
 425                                                         // e = strdup(&cbuf[5]);
 426                                                         int elen = (2 * strlen(&cbuf[5]));
 427                                                         e = malloc(elen);
 428                                                         urlesc(e, elen, &cbuf[5]);
 429                                                 }
 430                                                 if (!strncasecmp(cbuf, "time=", 5)) {
 431                                                         timestamp = atol(&cbuf[5]);
 432                                                 }
 433                                         }
 434                                 if (e == NULL) {
 435                                         e = malloc(20);
 436                                         sprintf(e, "%ld", msglist[i]);
 437                                 }
 438                                 StrBufAppendPrintf(Buf, "<D:response>");
 439
 440                                 // Generate the 'href' tag for this message
 441                                 StrBufAppendPrintf(Buf, "<D:href>");
 442                                 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
 443                                 StrBufAppendPrintf(Buf, "/ctdl/r/");
 444                                 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
 445                                 StrBufAppendPrintf(Buf, "/");
 446                                 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
 447                                 StrBufAppendPrintf(Buf, "</D:href>");
 448                                 StrBufAppendPrintf(Buf, "<D:propstat>");
 449                                 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
 450                                 StrBufAppendPrintf(Buf, "<D:prop>");
 451
 452                                 switch (c->room_default_view) {
 453                                 case VIEW_CALENDAR:
 454                                         StrBufAppendPrintf(Buf,
 455                                                            "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
 456                                         break;
 457                                 case VIEW_TASKS:
 458                                         StrBufAppendPrintf(Buf,
 459                                                            "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
 460                                         break;
 461                                 case VIEW_ADDRESSBOOK:
 462                                         StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
 463                                         break;
 464                                 }
 465
 466                                 if (timestamp > 0) {
 467                                         char *datestring = http_datestring(timestamp);
 468                                         if (datestring) {
 469                                                 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
 470                                                 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
 471                                                 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
 472                                                 free(datestring);
 473                                         }
 474                                         if (enumerate_by_euid) {        // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
 475                                                 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
 476                                         }
 477                                 }
 478                                 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
 479                                 free(e);
 480                         }
 481                         free(msglist);
 482                 };
 483         }
 484         // END COLLECTION
 485
 486         StrBufAppendPrintf(Buf, "</D:multistatus>\n");
 487
 488         add_response_header(h, strdup("Content-type"), strdup("text/xml"));
 489         h->response_code = 207;
 490         h->response_string = strdup("Multi-Status");
 491         h->response_body_length = StrLength(Buf);
 492         h->response_body = SmashStrBuf(&Buf);
 493 }
 494
 495 // some good examples here
 496 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
 497
 498
 499 // Called by the_room_itself() when the HTTP method is PROPFIND
 500 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 501         JsonValue *j = NewJsonObject(HKEY("gotoroom"));
 502
 503         JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), c->room, -1));
 504         JsonObjectAppend(j, NewJsonNumber(HKEY("current_view"), c->room_current_view));
 505         JsonObjectAppend(j, NewJsonNumber(HKEY("default_view"), c->room_default_view));
 506         JsonObjectAppend(j, NewJsonNumber(HKEY("is_room_aide"), c->is_room_aide));
 507         JsonObjectAppend(j, NewJsonNumber(HKEY("can_delete_messages"), c->can_delete_messages));
 508         JsonObjectAppend(j, NewJsonNumber(HKEY("new_messages"), c->new_messages));
 509         JsonObjectAppend(j, NewJsonNumber(HKEY("total_messages"), c->total_messages));
 510         JsonObjectAppend(j, NewJsonNumber(HKEY("last_seen"), c->last_seen));
 511         JsonObjectAppend(j, NewJsonNumber(HKEY("room_mtime"), c->room_mtime));
 512         JsonObjectAppend(j, NewJsonNumber(HKEY("new_mail"), c->new_mail));
 513
 514         StrBuf *sj = NewStrBuf();
 515         SerializeJson(sj, j, 1);        // '1' == free the source array
 516
 517         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 518         h->response_code = 200;
 519         h->response_string = strdup("OK");
 520         h->response_body_length = StrLength(sj);
 521         h->response_body = SmashStrBuf(&sj);
 522         return;
 523 }
 524
 525
 526 // Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
 527 // or /ctdl/r/roomname/ but *not* specific objects within the room)
 528 void the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
 529
 530         // OPTIONS method on the room itself usually is a DAV client assessing what's here.
 531         if (!strcasecmp(h->method, "OPTIONS")) {
 532                 options_the_room_itself(h, c);
 533                 return;
 534         }
 535
 536         // PROPFIND method on the room itself could be looking for a directory
 537         if (!strcasecmp(h->method, "PROPFIND")) {
 538                 propfind_the_room_itself(h, c);
 539                 return;
 540         }
 541
 542         // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
 543         if (!strcasecmp(h->method, "REPORT")) {
 544                 report_the_room_itself(h, c);
 545                 return;
 546         }
 547
 548         // GET method on the room itself is an API call, possibly from our JavaScript front end
 549         if (!strcasecmp(h->method, "get")) {
 550                 get_the_room_itself(h, c);
 551                 return;
 552         }
 553
 554         // we probably want a "go to this room" for interactive access
 555         do_404(h);
 556 }
 557
 558
 559 // Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
 560 void room_list(struct http_transaction *h, struct ctdlsession *c) {
 561         char buf[1024];
 562         char roomname[1024];
 563
 564         ctdl_printf(c, "LKRA");
 565         ctdl_readline(c, buf, sizeof(buf));
 566         if (buf[0] != '1') {
 567                 do_502(h);
 568                 return;
 569         }
 570
 571         JsonValue *j = NewJsonArray(HKEY("lkra"));
 572         while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
 573
 574                 // 0   |1      |2      |3      |4       |5 |6           |7           |8
 575                 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
 576                 JsonValue *jr = NewJsonObject(HKEY("room"));
 577
 578                 extract_token(roomname, buf, 0, '|', sizeof roomname);
 579                 JsonObjectAppend(jr, NewJsonPlainString(HKEY("name"), roomname, -1));
 580
 581                 JsonObjectAppend(jr, NewJsonNumber(HKEY("floor"), extract_int(buf, 2)));
 582                 JsonObjectAppend(jr, NewJsonNumber(HKEY("rorder"), extract_int(buf, 3)));
 583
 584                 int ra = extract_int(buf, 5);
 585                 JsonObjectAppend(jr, NewJsonBool(HKEY("known"), (ra & UA_KNOWN)));
 586                 JsonObjectAppend(jr, NewJsonBool(HKEY("hasnewmsgs"), (ra & UA_HASNEWMSGS)));
 587
 588                 JsonObjectAppend(jr, NewJsonNumber(HKEY("current_view"), extract_int(buf, 6)));
 589                 JsonObjectAppend(jr, NewJsonNumber(HKEY("default_view"), extract_int(buf, 7)));
 590                 JsonObjectAppend(jr, NewJsonNumber(HKEY("mtime"), extract_int(buf, 8)));
 591
 592                 JsonArrayAppend(j, jr); // add the room to the array
 593         }
 594
 595         StrBuf *sj = NewStrBuf();
 596         SerializeJson(sj, j, 1);        // '1' == free the source array
 597
 598         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 599         h->response_code = 200;
 600         h->response_string = strdup("OK");
 601         h->response_body_length = StrLength(sj);
 602         h->response_body = SmashStrBuf(&sj);
 603 }
 604
 605
 606 // Dispatcher for paths starting with /ctdl/r/
 607 void ctdl_r(struct http_transaction *h, struct ctdlsession *c) {
 608         char requested_roomname[128];
 609         char buf[1024];
 610         long room_flags = 0;
 611         long room_flags2 = 0;
 612
 613         // All room-related functions require being "in" the room specified.  Are we in that room already?
 614         extract_token(requested_roomname, h->url, 3, '/', sizeof requested_roomname);
 615         unescape_input(requested_roomname);
 616
 617         if (IsEmptyStr(requested_roomname)) {   //      /ctdl/r/
 618                 room_list(h, c);
 619                 return;
 620         }
 621         // If not, try to go there.
 622         if (strcasecmp(requested_roomname, c->room)) {
 623                 ctdl_printf(c, "GOTO %s", requested_roomname);
 624                 ctdl_readline(c, buf, sizeof(buf));
 625                 if (buf[0] == '2') {
 626                         // buf[3] will indicate whether any instant messages are waiting
 627                         extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
 628                         c->new_messages = extract_int(&buf[4], 1);
 629                         c->total_messages = extract_int(&buf[4], 2);
 630                         //      3       (int)info                       Info flag: set to nonzero if the user needs to read this room's info file
 631                         room_flags = extract_long(&buf[4], 3);          // Various flags associated with this room.
 632                         //      5       (long)CC->room.QRhighest        The highest message number present in this room
 633                         c->last_seen = extract_long(&buf[4], 6);        // The highest message number the user has read in this room
 634                         //      7       (int)rmailflag                  Boolean flag: 1 if this is a Mail> room, 0 otherwise.
 635                         c->is_room_aide = extract_int(&buf[4], 8);
 636                         c->new_mail = extract_int(&buf[4], 9);          // the number of new messages in the user's INBOX
 637                         //      10      (int)CC->room.QRfloor           The floor number this room resides on
 638                         c->room_current_view = extract_int(&buf[4], 11);
 639                         c->room_default_view = extract_int(&buf[4], 12);
 640                         //      13      (int)is_trash                   Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
 641                         room_flags2 = extract_long(&buf[4], 14);        // More flags associated with this room.
 642                         c->room_mtime = extract_long(&buf[4], 15);      // Timestamp of the last write activity in this room
 643
 644                         // If any of these three conditions are met, let the client know it has permission to delete messages.
 645                         if ((c->is_room_aide) || (room_flags & QR_MAILBOX) || (room_flags2 & QR2_COLLABDEL)) {
 646                                 c->can_delete_messages = 1;
 647                         }
 648                         else {
 649                                 c->can_delete_messages = 0;
 650                         }
 651                 }
 652                 else {
 653                         do_404(h);
 654                         return;
 655                 }
 656         }
 657         // At this point our Citadel client session is "in" the specified room.
 658
 659         if (num_tokens(h->url, '/') == 4) {     //      /ctdl/r/roomname
 660                 the_room_itself(h, c);
 661                 return;
 662         }
 663
 664         extract_token(buf, h->url, 4, '/', sizeof buf);
 665         if (num_tokens(h->url, '/') == 5) {
 666                 if (IsEmptyStr(buf)) {
 667                         the_room_itself(h, c);  //      /ctdl/r/roomname/       ( same as /ctdl/r/roomname )
 668                 }
 669                 else {
 670                         object_in_room(h, c);   //      /ctdl/r/roomname/object
 671                 }
 672                 return;
 673         }
 674         if (num_tokens(h->url, '/') == 6) {
 675                 object_in_room(h, c);   //      /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
 676                 return;
 677         }
 678         // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.
 679         do_404(h);
 680 }