3 // Copyright (c) 1996-2022 by the citadel.org team
5 // This program is open source software. It runs great on the
6 // Linux operating system (and probably elsewhere). You can use,
7 // copy, and run it under the terms of the GNU General Public
10 // This program is distributed in the hope that it will be useful,
11 // but WITHOUT ANY WARRANTY; without even the implied warranty of
12 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 // GNU General Public License for more details.
18 // Return a "zero-terminated" array of message numbers in the current room.
19 // Caller owns the memory and must free it. Returns NULL if any problems.
20 long *get_msglist(struct ctdlsession *c, char *which_msgs) {
26 ctdl_printf(c, "MSGS %s", which_msgs);
27 ctdl_readline(c, buf, sizeof(buf));
30 if (num_msgs >= num_alloc) {
33 msglist = malloc(num_alloc * sizeof(long));
37 msglist = realloc(msglist, num_alloc * sizeof(long));
40 ctdl_readline(c, buf, sizeof(buf));
41 msglist[num_msgs++] = atol(buf);
42 } while (strcmp(buf, "000")); // this makes the last element a "0" terminator
48 // Supplied with a list of potential matches from an If-Match: or If-None-Match: header, and
49 // a message number (which we always use as the entity tag in Citadel), return nonzero if the
50 // message number matches any of the supplied tags in the string.
51 int match_etags(char *taglist, long msgnum) {
52 int num_tags = num_tokens(taglist, ',');
56 if (msgnum <= 0) { // no msgnum? no match.
60 for (i = 0; i < num_tags; ++i) {
61 extract_token(tag, taglist, i, ',', sizeof tag);
63 char *lq = (strchr(tag, '"'));
64 char *rq = (strrchr(tag, '"'));
65 if (lq < rq) { // has two double quotes
70 if (!strcmp(tag, "*")) { // wildcard match
73 long tagmsgnum = atol(tag);
74 if ((tagmsgnum > 0) && (tagmsgnum == msgnum)) { // match
79 return (0); // no match
83 // Client is requesting a message list
84 void json_msglist(struct http_transaction *h, struct ctdlsession *c, char *which) {
86 long *msglist = get_msglist(c, which);
87 JsonValue *j = NewJsonArray(HKEY("msgs"));
89 if (msglist != NULL) {
90 for (i = 0; msglist[i] > 0; ++i) {
91 JsonArrayAppend(j, NewJsonNumber(HKEY("m"), msglist[i]));
96 StrBuf *sj = NewStrBuf();
97 SerializeJson(sj, j, 1); // '1' == free the source array
99 add_response_header(h, strdup("Content-type"), strdup("application/json"));
100 h->response_code = 200;
101 h->response_string = strdup("OK");
102 h->response_body_length = StrLength(sj);
103 h->response_body = SmashStrBuf(&sj);
108 // Client is requesting the room info banner
109 void read_room_info_banner(struct http_transaction *h, struct ctdlsession *c) {
112 ctdl_printf(c, "RINF");
113 ctdl_readline(c, buf, sizeof(buf));
115 StrBuf *info = NewStrBuf();
116 while (ctdl_readline(c, buf, sizeof(buf)), (strcmp(buf, "000"))){
117 StrBufAppendPrintf(info, "%s\n", buf);
119 add_response_header(h, strdup("Content-type"), strdup("text/plain"));
120 h->response_code = 200;
121 h->response_string = strdup("OK");
122 h->response_body_length = StrLength(info);
123 h->response_body = SmashStrBuf(&info);
132 // Client requested an object in a room.
133 void object_in_room(struct http_transaction *h, struct ctdlsession *c) {
136 char unescaped_euid[1024];
138 extract_token(buf, h->url, 4, '/', sizeof buf);
140 if (!strncasecmp(buf, "msgs.", 5)) { // Client is requesting a list of message numbers
141 unescape_input(&buf[5]);
142 json_msglist(h, c, &buf[5]);
146 if (!strcasecmp(buf, "info.txt")) { // Client is requesting the room info banner
147 read_room_info_banner(h, c);
151 // If we get to this point, the client is requesting a specific object *in* the room.
153 if ((c->room_default_view == VIEW_CALENDAR) // room types where objects are referenced by EUID
154 || (c->room_default_view == VIEW_TASKS)
155 || (c->room_default_view == VIEW_ADDRESSBOOK)
157 safestrncpy(unescaped_euid, buf, sizeof unescaped_euid);
158 unescape_input(unescaped_euid);
159 msgnum = locate_message_by_uid(c, unescaped_euid);
161 else { // otherwise the object is being referenced by message number
165 // All methods except PUT require the message to already exist
166 if ((msgnum <= 0) && (strcasecmp(h->method, "PUT"))) {
170 // If we get to this point we have a valid message number in an accessible room.
171 syslog(LOG_DEBUG, "msgnum is %ld, method is %s", msgnum, h->method);
173 // A sixth component in the URL can be one of two things:
174 // (1) a MIME part specifier, in which case the client wants to download that component within the message
175 // (2) a content-type, in which ase the client wants us to try to render it a certain way
176 if (num_tokens(h->url, '/') == 6) {
177 extract_token(buf, h->url, 5, '/', sizeof buf);
178 if (!IsEmptyStr(buf)) {
179 if (!strcasecmp(buf, "json")) {
180 json_render_one_message(h, c, msgnum);
183 download_mime_component(h, c, msgnum, buf);
189 // Ok, we want a full message, but first let's check for the if[-none]-match headers.
190 char *if_match = header_val(h, "If-Match");
191 if ((if_match != NULL) && (!match_etags(if_match, msgnum))) {
196 char *if_none_match = header_val(h, "If-None-Match");
197 if ((if_none_match != NULL) && (match_etags(if_none_match, msgnum))) {
204 if (!strcasecmp(h->method, "DELETE")) {
205 dav_delete_message(h, c, msgnum);
207 else if (!strcasecmp(h->method, "GET")) {
208 dav_get_message(h, c, msgnum);
210 else if (!strcasecmp(h->method, "PUT")) {
211 dav_put_message(h, c, unescaped_euid, msgnum);
214 do_404(h); // Got this far but the method made no sense? Bummer.
220 // Called by the_room_itself() when the HTTP method is REPORT
221 void report_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
222 if (c->room_default_view == VIEW_CALENDAR) {
223 caldav_report(h, c); // CalDAV REPORTs ... fmgwac
227 do_404(h); // future implementations like CardDAV will require code paths here
231 // Called by the_room_itself() when the HTTP method is OPTIONS
232 void options_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
233 h->response_code = 200;
234 h->response_string = strdup("OK");
235 if (c->room_default_view == VIEW_CALENDAR) {
236 add_response_header(h, strdup("DAV"), strdup("1, calendar-access")); // offer CalDAV
238 else if (c->room_default_view == VIEW_ADDRESSBOOK) {
239 add_response_header(h, strdup("DAV"), strdup("1, addressbook")); // offer CardDAV
242 add_response_header(h, strdup("DAV"), strdup("1")); // ordinary WebDAV for all other room types
244 add_response_header(h, strdup("Allow"), strdup("OPTIONS, PROPFIND, GET, PUT, REPORT, DELETE"));
248 // Called by the_room_itself() when the HTTP method is PROPFIND
249 void propfind_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
252 int dav_depth = (header_val(h, "Depth") ? atoi(header_val(h, "Depth")) : INT_MAX);
253 syslog(LOG_DEBUG, "Client PROPFIND requested depth: %d", dav_depth);
254 StrBuf *Buf = NewStrBuf();
256 StrBufAppendPrintf(Buf, "<?xml version=\"1.0\" encoding=\"utf-8\"?>"
257 "<D:multistatus " "xmlns:D=\"DAV:\" " "xmlns:C=\"urn:ietf:params:xml:ns:caldav\"" ">");
259 // Transmit the collection resource
260 StrBufAppendPrintf(Buf, "<D:response>");
261 StrBufAppendPrintf(Buf, "<D:href>");
262 StrBufXMLEscAppend(Buf, NULL, h->site_prefix, strlen(h->site_prefix), 0);
263 StrBufAppendPrintf(Buf, "/ctdl/r/");
264 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
265 StrBufAppendPrintf(Buf, "</D:href>");
267 StrBufAppendPrintf(Buf, "<D:propstat>");
268 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
269 StrBufAppendPrintf(Buf, "<D:prop>");
270 StrBufAppendPrintf(Buf, "<D:displayname>");
271 StrBufXMLEscAppend(Buf, NULL, c->room, strlen(c->room), 0);
272 StrBufAppendPrintf(Buf, "</D:displayname>");
274 StrBufAppendPrintf(Buf, "<D:owner />"); // empty owner ought to be legal; see rfc3744 section 5.1
276 StrBufAppendPrintf(Buf, "<D:resourcetype><D:collection />");
277 switch (c->room_default_view) {
279 StrBufAppendPrintf(Buf, "<C:calendar />"); // RFC4791 section 4.2
282 StrBufAppendPrintf(Buf, "</D:resourcetype>");
284 int enumerate_by_euid = 0; // nonzero if messages will be retrieved by euid instead of msgnum
285 switch (c->room_default_view) {
286 case VIEW_CALENDAR: // RFC4791 section 5.2
287 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VEVENT\"/></C:supported-calendar-component-set>");
288 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
289 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
290 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
291 enumerate_by_euid = 1;
293 case VIEW_TASKS: // RFC4791 section 5.2
294 StrBufAppendPrintf(Buf, "<C:supported-calendar-component-set><C:comp name=\"VTODO\"/></C:supported-calendar-component-set>");
295 StrBufAppendPrintf(Buf, "<C:supported-calendar-data>");
296 StrBufAppendPrintf(Buf, "<C:calendar-data content-type=\"text/calendar\" version=\"2.0\"/>");
297 StrBufAppendPrintf(Buf, "</C:supported-calendar-data>");
298 enumerate_by_euid = 1;
300 case VIEW_ADDRESSBOOK: // FIXME put some sort of CardDAV crapola here when we implement it
301 enumerate_by_euid = 1;
303 case VIEW_WIKI: // FIXME invent "WikiDAV" ?
304 enumerate_by_euid = 1;
308 // FIXME get the mtime
309 // StrBufAppendPrintf(Buf, "<D:getlastmodified>");
310 // escputs(datestring);
311 // StrBufAppendPrintf(Buf, "</D:getlastmodified>");
313 StrBufAppendPrintf(Buf, "</D:prop>");
314 StrBufAppendPrintf(Buf, "</D:propstat>");
315 StrBufAppendPrintf(Buf, "</D:response>\n");
317 // If a depth greater than zero was specified, transmit the collection listing
320 long *msglist = get_msglist(c, "ALL");
323 for (i = 0; (msglist[i] > 0); ++i) {
325 syslog(LOG_DEBUG, "PROPFIND enumerated %d messages", i);
326 e = NULL; // EUID gets stored here
330 ctdl_printf(c, "MSG0 %ld|3", msglist[i]);
331 ctdl_readline(c, cbuf, sizeof(cbuf));
333 while (ctdl_readline(c, cbuf, sizeof(cbuf)), strcmp(cbuf, "000")) {
334 if ((enumerate_by_euid) && (!strncasecmp(cbuf, "exti=", 5))) {
335 // e = strdup(&cbuf[5]);
336 int elen = (2 * strlen(&cbuf[5]));
338 urlesc(e, elen, &cbuf[5]);
340 if (!strncasecmp(cbuf, "time=", 5)) {
341 timestamp = atol(&cbuf[5]);
346 sprintf(e, "%ld", msglist[i]);
348 StrBufAppendPrintf(Buf, "<D:response>");
350 // Generate the 'href' tag for this message
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, "/");
356 StrBufXMLEscAppend(Buf, NULL, e, strlen(e), 0);
357 StrBufAppendPrintf(Buf, "</D:href>");
358 StrBufAppendPrintf(Buf, "<D:propstat>");
359 StrBufAppendPrintf(Buf, "<D:status>HTTP/1.1 200 OK</D:status>");
360 StrBufAppendPrintf(Buf, "<D:prop>");
362 switch (c->room_default_view) {
364 StrBufAppendPrintf(Buf,
365 "<D:getcontenttype>text/calendar; component=vevent</D:getcontenttype>");
368 StrBufAppendPrintf(Buf,
369 "<D:getcontenttype>text/calendar; component=vtodo</D:getcontenttype>");
371 case VIEW_ADDRESSBOOK:
372 StrBufAppendPrintf(Buf, "<D:getcontenttype>text/x-vcard</D:getcontenttype>");
377 char *datestring = http_datestring(timestamp);
379 StrBufAppendPrintf(Buf, "<D:getlastmodified>");
380 StrBufXMLEscAppend(Buf, NULL, datestring, strlen(datestring), 0);
381 StrBufAppendPrintf(Buf, "</D:getlastmodified>");
384 if (enumerate_by_euid) { // FIXME ajc 2017oct30 should this be inside the timestamp conditional?
385 StrBufAppendPrintf(Buf, "<D:getetag>\"%ld\"</D:getetag>", msglist[i]);
388 StrBufAppendPrintf(Buf, "</D:prop></D:propstat></D:response>\n");
396 StrBufAppendPrintf(Buf, "</D:multistatus>\n");
398 add_response_header(h, strdup("Content-type"), strdup("text/xml"));
399 h->response_code = 207;
400 h->response_string = strdup("Multi-Status");
401 h->response_body_length = StrLength(Buf);
402 h->response_body = SmashStrBuf(&Buf);
405 // some good examples here
406 // http://blogs.nologin.es/rickyepoderi/index.php?/archives/14-Introducing-CalDAV-Part-I.html
409 // Called by the_room_itself() when the HTTP method is PROPFIND
410 void get_the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
411 JsonValue *j = NewJsonObject(HKEY("gotoroom"));
413 JsonObjectAppend(j, NewJsonPlainString(HKEY("name"), c->room, -1));
414 JsonObjectAppend(j, NewJsonNumber(HKEY("current_view"), c->room_current_view));
415 JsonObjectAppend(j, NewJsonNumber(HKEY("default_view"), c->room_default_view));
416 JsonObjectAppend(j, NewJsonNumber(HKEY("new_messages"), c->new_messages));
417 JsonObjectAppend(j, NewJsonNumber(HKEY("total_messages"), c->total_messages));
418 JsonObjectAppend(j, NewJsonNumber(HKEY("last_seen"), c->last_seen));
420 StrBuf *sj = NewStrBuf();
421 SerializeJson(sj, j, 1); // '1' == free the source array
423 add_response_header(h, strdup("Content-type"), strdup("application/json"));
424 h->response_code = 200;
425 h->response_string = strdup("OK");
426 h->response_body_length = StrLength(sj);
427 h->response_body = SmashStrBuf(&sj);
432 // Handle REST/DAV requests for the room itself (such as /ctdl/r/roomname
433 // or /ctdl/r/roomname/ but *not* specific objects within the room)
434 void the_room_itself(struct http_transaction *h, struct ctdlsession *c) {
436 // OPTIONS method on the room itself usually is a DAV client assessing what's here.
437 if (!strcasecmp(h->method, "OPTIONS")) {
438 options_the_room_itself(h, c);
442 // PROPFIND method on the room itself could be looking for a directory
443 if (!strcasecmp(h->method, "PROPFIND")) {
444 propfind_the_room_itself(h, c);
448 // REPORT method on the room itself is probably the dreaded CalDAV tower-of-crapola
449 if (!strcasecmp(h->method, "REPORT")) {
450 report_the_room_itself(h, c);
454 // GET method on the room itself is an API call, possibly from our JavaScript front end
455 if (!strcasecmp(h->method, "get")) {
456 get_the_room_itself(h, c);
460 // we probably want a "go to this room" for interactive access
465 // Dispatcher for "/ctdl/r" and "/ctdl/r/" for the room list
466 void room_list(struct http_transaction *h, struct ctdlsession *c) {
470 ctdl_printf(c, "LKRA");
471 ctdl_readline(c, buf, sizeof(buf));
477 JsonValue *j = NewJsonArray(HKEY("lkra"));
478 while (ctdl_readline(c, buf, sizeof(buf)), strcmp(buf, "000")) {
480 // 0 |1 |2 |3 |4 |5 |6 |7 |8
481 // name|QRflags|QRfloor|QRorder|QRflags2|ra|current_view|default_view|mtime
482 JsonValue *jr = NewJsonObject(HKEY("room"));
484 extract_token(roomname, buf, 0, '|', sizeof roomname);
485 JsonObjectAppend(jr, NewJsonPlainString(HKEY("name"), roomname, -1));
487 JsonObjectAppend(jr, NewJsonNumber(HKEY("floor"), extract_int(buf, 2)));
488 JsonObjectAppend(jr, NewJsonNumber(HKEY("rorder"), extract_int(buf, 3)));
490 int ra = extract_int(buf, 5);
491 JsonObjectAppend(jr, NewJsonBool(HKEY("known"), (ra & UA_KNOWN)));
492 JsonObjectAppend(jr, NewJsonBool(HKEY("hasnewmsgs"), (ra & UA_HASNEWMSGS)));
494 JsonObjectAppend(jr, NewJsonNumber(HKEY("current_view"), extract_int(buf, 6)));
495 JsonObjectAppend(jr, NewJsonNumber(HKEY("default_view"), extract_int(buf, 7)));
496 JsonObjectAppend(jr, NewJsonNumber(HKEY("mtime"), extract_int(buf, 8)));
498 JsonArrayAppend(j, jr); // add the room to the array
501 StrBuf *sj = NewStrBuf();
502 SerializeJson(sj, j, 1); // '1' == free the source array
504 add_response_header(h, strdup("Content-type"), strdup("application/json"));
505 h->response_code = 200;
506 h->response_string = strdup("OK");
507 h->response_body_length = StrLength(sj);
508 h->response_body = SmashStrBuf(&sj);
512 // Dispatcher for paths starting with /ctdl/r/
513 void ctdl_r(struct http_transaction *h, struct ctdlsession *c) {
514 char requested_roomname[128];
517 // All room-related functions require being "in" the room specified. Are we in that room already?
518 extract_token(requested_roomname, h->url, 3, '/', sizeof requested_roomname);
519 unescape_input(requested_roomname);
521 if (IsEmptyStr(requested_roomname)) { // /ctdl/r/
525 // If not, try to go there.
526 if (strcasecmp(requested_roomname, c->room)) {
527 ctdl_printf(c, "GOTO %s", requested_roomname);
528 ctdl_readline(c, buf, sizeof(buf));
530 // buf[3] will indicate whether any instant messages are waiting
531 extract_token(c->room, &buf[4], 0, '|', sizeof c->room);
532 c->new_messages = extract_int(&buf[4], 1);
533 c->total_messages = extract_int(&buf[4], 2);
534 // 3 (int)info Info flag: set to nonzero if the user needs to read this room's info file
535 // 4 (int)CC->room.QRflags Various flags associated with this room.
536 // 5 (long)CC->room.QRhighest The highest message number present in this room
537 c->last_seen = extract_long(&buf[4], 6); // The highest message number the user has read in this room
538 // 7 (int)rmailflag Boolean flag: 1 if this is a Mail> room, 0 otherwise.
539 // 8 (int)raideflag Nonzero if user is either Aide or a Room Aide in this room
540 // 9 (int)newmailcount The number of new Mail messages the user has
541 // 10 (int)CC->room.QRfloor The floor number this room resides on
542 c->room_current_view = extract_int(&buf[4], 11);
543 c->room_default_view = extract_int(&buf[4], 12);
544 // 13 (int)is_trash Boolean flag: 1 if this is the user's Trash folder, 0 otherwise.
545 // 14 (int)CC->room.QRflags2 More flags associated with this room
546 // 15 (long)CC->room.QRmtime Timestamp of the last write activity in this room
553 // At this point our Citadel client session is "in" the specified room.
555 if (num_tokens(h->url, '/') == 4) { // /ctdl/r/roomname
556 the_room_itself(h, c);
560 extract_token(buf, h->url, 4, '/', sizeof buf);
561 if (num_tokens(h->url, '/') == 5) {
562 if (IsEmptyStr(buf)) {
563 the_room_itself(h, c); // /ctdl/r/roomname/ ( same as /ctdl/r/roomname )
566 object_in_room(h, c); // /ctdl/r/roomname/object
570 if (num_tokens(h->url, '/') == 6) {
571 object_in_room(h, c); // /ctdl/r/roomname/object/ or possibly /ctdl/r/roomname/object/component
574 // If we get to this point, the client specified a valid room but requested an action we don't know how to perform.