4 * Implements the FETCH command in IMAP.
5 * This is a good example of the protocol's gratuitous complexity.
7 * Copyright (c) 2001-2009 by the citadel.org team
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 3 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
33 #include <sys/types.h>
35 #if TIME_WITH_SYS_TIME
36 # include <sys/time.h>
40 # include <sys/time.h>
50 #include <libcitadel.h>
53 #include "sysdep_decls.h"
54 #include "citserver.h"
60 #include "internet_addressing.h"
61 #include "imap_tools.h"
62 #include "serv_imap.h"
63 #include "imap_fetch.h"
65 #include "ctdl_module.h"
70 * Individual field functions for imap_do_fetch_msg() ...
73 void imap_fetch_uid(int seq) {
74 cprintf("UID %ld", IMAP->msgids[seq-1]);
77 void imap_fetch_flags(int seq) {
78 int num_flags_printed = 0;
80 if (IMAP->flags[seq] & IMAP_DELETED) {
81 if (num_flags_printed > 0) cprintf(" ");
85 if (IMAP->flags[seq] & IMAP_SEEN) {
86 if (num_flags_printed > 0) cprintf(" ");
90 if (IMAP->flags[seq] & IMAP_ANSWERED) {
91 if (num_flags_printed > 0) cprintf(" ");
92 cprintf("\\Answered");
95 if (IMAP->flags[seq] & IMAP_RECENT) {
96 if (num_flags_printed > 0) cprintf(" ");
104 void imap_fetch_internaldate(struct CtdlMessage *msg) {
109 if (msg->cm_fields['T'] != NULL) {
110 msgdate = atol(msg->cm_fields['T']);
113 msgdate = time(NULL);
116 datestring(datebuf, sizeof datebuf, msgdate, DATESTRING_IMAP);
117 cprintf("INTERNALDATE \"%s\"", datebuf);
122 * Fetch RFC822-formatted messages.
124 * 'whichfmt' should be set to one of:
125 * "RFC822" entire message
126 * "RFC822.HEADER" headers only (with trailing blank line)
127 * "RFC822.SIZE" size of translated message
128 * "RFC822.TEXT" body only (without leading blank line)
130 void imap_fetch_rfc822(long msgnum, const char *whichfmt) {
131 const char *ptr = NULL;
132 size_t headers_size, text_size, total_size;
133 size_t bytes_to_send = 0;
135 int need_to_rewrite_metadata = 0;
137 CitContext *CCC = CC;
139 /* Determine whether this particular fetch operation requires
140 * us to fetch the message body from disk. If not, we can save
141 * on some disk operations...
143 if ( (!strcasecmp(whichfmt, "RFC822"))
144 || (!strcasecmp(whichfmt, "RFC822.TEXT")) ) {
148 /* If this is an RFC822.SIZE fetch, first look in the message's
149 * metadata record to see if we've saved that information.
151 if (!strcasecmp(whichfmt, "RFC822.SIZE")) {
152 GetMetaData(&smi, msgnum);
153 if (smi.meta_rfc822_length > 0L) {
154 cprintf("RFC822.SIZE %ld", smi.meta_rfc822_length);
157 need_to_rewrite_metadata = 1;
161 /* Cache the most recent RFC822 FETCH because some clients like to
162 * fetch in pieces, and we don't want to have to go back to the
163 * message store for each piece. We also burn the cache if the
164 * client requests something that involves reading the message
165 * body, but we haven't fetched the body yet.
167 if ((IMAP->cached_rfc822 != NULL)
168 && (IMAP->cached_rfc822_msgnum == msgnum)
169 && (IMAP->cached_rfc822_withbody || (!need_body)) ) {
172 else if (IMAP->cached_rfc822 != NULL) {
173 /* Some other message is cached -- free it */
174 FreeStrBuf(&IMAP->cached_rfc822);
175 IMAP->cached_rfc822_msgnum = (-1);
178 /* At this point, we now can fetch and convert the message iff it's not
179 * the one we had cached.
181 if (IMAP->cached_rfc822 == NULL) {
183 * Load the message into memory for translation & measurement
185 CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
186 CtdlOutputMsg(msgnum, MT_RFC822,
187 (need_body ? HEADERS_ALL : HEADERS_FAST),
188 0, 1, NULL, SUPPRESS_ENV_TO
190 if (!need_body) cprintf("\r\n"); /* extra trailing newline */
191 IMAP->cached_rfc822 = CCC->redirect_buffer;
192 CCC->redirect_buffer = NULL;
193 IMAP->cached_rfc822_msgnum = msgnum;
194 IMAP->cached_rfc822_withbody = need_body;
195 if ( (need_to_rewrite_metadata) &&
196 (StrLength(IMAP->cached_rfc822) > 0) ) {
197 smi.meta_rfc822_length = StrLength(IMAP->cached_rfc822);
203 * Now figure out where the headers/text break is. IMAP considers the
204 * intervening blank line to be part of the headers, not the text.
211 StrBuf *Line = NewStrBuf();
214 StrBufSipLine(Line, IMAP->cached_rfc822, &ptr);
216 if ((StrLength(Line) != 0) && (ptr != StrBufNOTNULL))
219 if ((StrLength(Line) != 0) &&
220 (ptr != StrBufNOTNULL) )
222 headers_size = ptr - ChrPtr(IMAP->cached_rfc822);
225 } while ( (headers_size == 0) &&
226 (ptr != StrBufNOTNULL) );
228 total_size = StrLength(IMAP->cached_rfc822);
229 text_size = total_size - headers_size;
234 total_size = StrLength(IMAP->cached_rfc822);
238 CtdlLogPrintf(CTDL_DEBUG,
239 "RFC822: headers=" SIZE_T_FMT
241 ", total=" SIZE_T_FMT "\n",
242 headers_size, text_size, total_size);
244 if (!strcasecmp(whichfmt, "RFC822.SIZE")) {
245 cprintf("RFC822.SIZE " SIZE_T_FMT, total_size);
249 else if (!strcasecmp(whichfmt, "RFC822")) {
250 ptr = ChrPtr(IMAP->cached_rfc822);
251 bytes_to_send = total_size;
254 else if (!strcasecmp(whichfmt, "RFC822.HEADER")) {
255 ptr = ChrPtr(IMAP->cached_rfc822);
256 bytes_to_send = headers_size;
259 else if (!strcasecmp(whichfmt, "RFC822.TEXT")) {
260 ptr = &ChrPtr(IMAP->cached_rfc822)[headers_size];
261 bytes_to_send = text_size;
264 cprintf("%s {" SIZE_T_FMT "}\r\n", whichfmt, bytes_to_send);
265 client_write(ptr, bytes_to_send);
271 * Load a specific part of a message into the temp file to be output to a
272 * client. FIXME we can handle parts like "2" and "2.1" and even "2.MIME"
273 * but we still can't handle "2.HEADER" (which might not be a problem).
275 * Note: mime_parser() was called with dont_decode set to 1, so we have the
276 * luxury of simply spewing without having to re-encode.
278 void imap_load_part(char *name, char *filename, char *partnum, char *disp,
279 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
280 char *cbid, void *cbuserdata)
283 char *desired_section;
285 desired_section = (char *)cbuserdata;
287 if (!strcasecmp(partnum, desired_section)) {
288 client_write(content, length);
291 snprintf(mimebuf2, sizeof mimebuf2, "%s.MIME", partnum);
293 if (!strcasecmp(desired_section, mimebuf2)) {
294 cprintf("Content-type: %s", cbtype);
295 if (!IsEmptyStr(cbcharset))
296 cprintf("; charset=\"%s\"", cbcharset);
297 if (!IsEmptyStr(name))
298 cprintf("; name=\"%s\"", name);
300 if (!IsEmptyStr(encoding))
301 cprintf("Content-Transfer-Encoding: %s\r\n", encoding);
302 if (!IsEmptyStr(encoding)) {
303 cprintf("Content-Disposition: %s", disp);
304 if (!IsEmptyStr(filename)) {
305 cprintf("; filename=\"%s\"", filename);
309 cprintf("Content-Length: %ld\r\n", (long)length);
318 * Called by imap_fetch_envelope() to output the "From" field.
319 * This is in its own function because its logic is kind of complex. We
320 * really need to make this suck less.
322 void imap_output_envelope_from(struct CtdlMessage *msg) {
323 char user[SIZ], node[SIZ], name[SIZ];
327 /* For anonymous messages, it's so easy! */
328 if (!is_room_aide() && (msg->cm_anon_type == MES_ANONONLY)) {
329 cprintf("((\"----\" NIL \"x\" \"x.org\")) ");
332 if (!is_room_aide() && (msg->cm_anon_type == MES_ANONOPT)) {
333 cprintf("((\"anonymous\" NIL \"x\" \"x.org\")) ");
337 /* For everything else, we do stuff. */
338 cprintf("(("); /* open double-parens */
339 plain_imap_strout(msg->cm_fields['A']); /* personal name */
340 cprintf(" NIL "); /* source route (not used) */
343 if (msg->cm_fields['F'] != NULL) {
344 process_rfc822_addr(msg->cm_fields['F'], user, node, name);
345 plain_imap_strout(user); /* mailbox name (user id) */
347 if (!strcasecmp(node, config.c_nodename)) {
348 plain_imap_strout(config.c_fqdn);
351 plain_imap_strout(node); /* host name */
355 plain_imap_strout(msg->cm_fields['A']); /* mailbox name (user id) */
357 plain_imap_strout(msg->cm_fields['N']); /* host name */
360 cprintf(")) "); /* close double-parens */
366 * Output an envelope address (or set of addresses) in the official,
367 * convoluted, braindead format. (Note that we can't use this for
368 * the "From" address because its data may come from a number of different
369 * fields. But we can use it for "To" and possibly others.
371 void imap_output_envelope_addr(char *addr) {
372 char individual_addr[256];
384 if (IsEmptyStr(addr)) {
391 /* How many addresses are listed here? */
392 num_addrs = num_tokens(addr, ',');
394 /* Output them one by one. */
395 for (i=0; i<num_addrs; ++i) {
396 extract_token(individual_addr, addr, i, ',', sizeof individual_addr);
397 striplt(individual_addr);
398 process_rfc822_addr(individual_addr, user, node, name);
400 plain_imap_strout(name);
402 plain_imap_strout(user);
404 plain_imap_strout(node);
406 if (i < (num_addrs-1)) cprintf(" ");
414 * Implements the ENVELOPE fetch item
416 * Note that the imap_strout() function can cleverly output NULL fields as NIL,
417 * so we don't have to check for that condition like we do elsewhere.
419 void imap_fetch_envelope(struct CtdlMessage *msg) {
420 char datestringbuf[SIZ];
422 char *fieldptr = NULL;
426 /* Parse the message date into an IMAP-format date string */
427 if (msg->cm_fields['T'] != NULL) {
428 msgdate = atol(msg->cm_fields['T']);
431 msgdate = time(NULL);
433 datestring(datestringbuf, sizeof datestringbuf,
434 msgdate, DATESTRING_IMAP);
436 /* Now start spewing data fields. The order is important, as it is
437 * defined by the protocol specification. Nonexistent fields must
438 * be output as NIL, existent fields must be quoted or literalled.
439 * The imap_strout() function conveniently does all this for us.
441 cprintf("ENVELOPE (");
444 plain_imap_strout(datestringbuf);
448 plain_imap_strout(msg->cm_fields['U']);
452 imap_output_envelope_from(msg);
454 /* Sender (default to same as 'From' if not present) */
455 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Sender");
456 if (fieldptr != NULL) {
457 imap_output_envelope_addr(fieldptr);
461 imap_output_envelope_from(msg);
465 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Reply-to");
466 if (fieldptr != NULL) {
467 imap_output_envelope_addr(fieldptr);
471 imap_output_envelope_from(msg);
475 imap_output_envelope_addr(msg->cm_fields['R']);
477 /* Cc (we do it this way because there might be a legacy non-Citadel Cc: field present) */
478 fieldptr = msg->cm_fields['Y'];
479 if (fieldptr != NULL) {
480 imap_output_envelope_addr(fieldptr);
483 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Cc");
484 imap_output_envelope_addr(fieldptr);
485 if (fieldptr != NULL) free(fieldptr);
489 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "Bcc");
490 imap_output_envelope_addr(fieldptr);
491 if (fieldptr != NULL) free(fieldptr);
494 fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "In-reply-to");
495 plain_imap_strout(fieldptr);
497 if (fieldptr != NULL) free(fieldptr);
500 plain_imap_strout(msg->cm_fields['I']);
506 * This function is called only when CC->redirect_buffer contains a set of
507 * RFC822 headers with no body attached. Its job is to strip that set of
508 * headers down to *only* the ones we're interested in.
510 void imap_strip_headers(StrBuf *section) {
512 StrBuf *which_fields = NULL;
513 int doing_headers = 0;
517 StrBuf *boiled_headers = NULL;
520 int done_headers = 0;
521 const char *Ptr = NULL;
522 CitContext *CCC = CC;
524 if (CCC->redirect_buffer == NULL) return;
526 which_fields = NewStrBufDup(section);
528 if (!strncasecmp(ChrPtr(which_fields), "HEADER.FIELDS", 13))
531 !strncasecmp(ChrPtr(which_fields), "HEADER.FIELDS.NOT", 17))
534 for (i=0; i < StrLength(which_fields); ++i) {
535 if (ChrPtr(which_fields)[i]=='(')
536 StrBufReplaceToken(which_fields, i, 1, HKEY(""));
538 for (i=0; i < StrLength(which_fields); ++i) {
539 if (ChrPtr(which_fields)[i]==')') {
540 StrBufCutAt(which_fields, i, NULL);
544 memset(&Cmd, 0, sizeof(citimap_command));
545 Cmd.CmdBuf = which_fields;
546 num_parms = imap_parameterize(&Cmd);
548 boiled_headers = NewStrBufPlain(NULL, StrLength(CCC->redirect_buffer));
549 Line = NewStrBufPlain(NULL, SIZ);
553 StrBufSipLine(Line, CCC->redirect_buffer, &Ptr);
555 if (!isspace(ChrPtr(Line)[0])) {
557 if (doing_headers == 0) ok = 1;
559 /* we're supposed to print all headers that are not matching the filter list */
560 if (headers_not) for (i=0, ok = 1; (i < num_parms) && (ok == 1); ++i) {
561 if ( (!strncasecmp(ChrPtr(Line),
563 Cmd.Params[i].len)) &&
564 (ChrPtr(Line)[Cmd.Params[i].len]==':') ) {
568 /* we're supposed to print all headers matching the filterlist */
569 else for (i=0, ok = 0; ((i < num_parms) && (ok == 0)); ++i) {
570 if ( (!strncasecmp(ChrPtr(Line),
572 Cmd.Params[i].len)) &&
573 (ChrPtr(Line)[Cmd.Params[i].len]==':') ) {
581 StrBufAppendBuf(boiled_headers, Line, 0);
582 StrBufAppendBufPlain(boiled_headers, HKEY("\r\n"), 0);
585 if ((Ptr == StrBufNOTNULL) ||
586 (StrLength(Line) == 0) ||
587 (ChrPtr(Line)[0]=='\r') ||
588 (ChrPtr(Line)[0]=='\n') ) done_headers = 1;
589 } while (!done_headers);
591 StrBufAppendBufPlain(boiled_headers, HKEY("\r\n"), 0);
593 /* Now save it back (it'll always be smaller) */
594 FreeStrBuf(&CCC->redirect_buffer);
595 CCC->redirect_buffer = boiled_headers;
598 FreeStrBuf(&which_fields);
604 * Implements the BODY and BODY.PEEK fetch items
606 void imap_fetch_body(long msgnum, ConstStr item, int is_peek) {
607 struct CtdlMessage *msg = NULL;
611 size_t pstart, pbytes;
612 int loading_body_now = 0;
614 int burn_the_cache = 0;
615 CitContext *CCC = CC;
617 /* extract section */
618 section = NewStrBufPlain(CKEY(item));
620 if (strchr(ChrPtr(section), '[') != NULL) {
621 StrBufStripAllBut(section, '[', ']');
623 CtdlLogPrintf(CTDL_DEBUG, "Section is: [%s]\n",
624 (StrLength(section) == 0) ? "(empty)" : ChrPtr(section)
627 /* Burn the cache if we don't have the same section of the
628 * same message again.
630 if (IMAP->cached_body != NULL) {
631 if (IMAP->cached_bodymsgnum != msgnum) {
634 else if ( (!IMAP->cached_body_withbody) && (need_body) ) {
637 else if (strcasecmp(IMAP->cached_bodypart, ChrPtr(section))) {
640 if (burn_the_cache) {
641 /* Yup, go ahead and burn the cache. */
642 free(IMAP->cached_body);
643 IMAP->cached_body_len = 0;
644 IMAP->cached_body = NULL;
645 IMAP->cached_bodymsgnum = (-1);
646 strcpy(IMAP->cached_bodypart, "");
650 /* extract partial */
651 partial = NewStrBufPlain(CKEY(item));
652 if (strchr(ChrPtr(partial), '<') != NULL) {
653 StrBufStripAllBut(partial, '<', '>');
656 if ( (is_partial == 1) && (StrLength(partial) > 0) ) {
657 CtdlLogPrintf(CTDL_DEBUG, "Partial is <%s>\n", ChrPtr(partial));
660 if (IMAP->cached_body == NULL) {
661 CCC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
662 loading_body_now = 1;
663 msg = CtdlFetchMessage(msgnum, (need_body ? 1 : 0));
666 /* Now figure out what the client wants, and get it */
668 if (!loading_body_now) {
669 /* What we want is already in memory */
672 else if ( (!strcmp(ChrPtr(section), "1")) && (msg->cm_format_type != 4) ) {
673 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_NONE, 0, 1, SUPPRESS_ENV_TO);
676 else if (StrLength(section) == 0) {
677 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ALL, 0, 1, SUPPRESS_ENV_TO);
681 * If the client asked for just headers, or just particular header
682 * fields, strip it down.
684 else if (!strncasecmp(ChrPtr(section), "HEADER", 6)) {
685 /* This used to work with HEADERS_FAST, but then Apple got stupid with their
686 * IMAP library and this broke Mail.App and iPhone Mail, so we had to change it
687 * to HEADERS_ONLY so the trendy hipsters with their iPhones can read mail.
689 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_ONLY, 0, 1, SUPPRESS_ENV_TO);
690 imap_strip_headers(section);
694 * Strip it down if the client asked for everything _except_ headers.
696 else if (!strncasecmp(ChrPtr(section), "TEXT", 4)) {
697 CtdlOutputPreLoadedMsg(msg, MT_RFC822, HEADERS_NONE, 0, 1, SUPPRESS_ENV_TO);
701 * Anything else must be a part specifier.
702 * (Note value of 1 passed as 'dont_decode' so client gets it encoded)
705 mime_parser(msg->cm_fields['M'], NULL,
706 *imap_load_part, NULL, NULL,
711 if (loading_body_now) {
712 IMAP->cached_body_len = StrLength(CCC->redirect_buffer);
713 IMAP->cached_body = SmashStrBuf(&CCC->redirect_buffer);
714 IMAP->cached_bodymsgnum = msgnum;
715 IMAP->cached_body_withbody = need_body;
716 strcpy(IMAP->cached_bodypart, ChrPtr(section));
719 if (is_partial == 0) {
720 cprintf("BODY[%s] {" SIZE_T_FMT "}\r\n", ChrPtr(section), IMAP->cached_body_len);
722 pbytes = IMAP->cached_body_len;
725 sscanf(ChrPtr(partial), SIZE_T_FMT "." SIZE_T_FMT, &pstart, &pbytes);
726 if (pbytes > (IMAP->cached_body_len - pstart)) {
727 pbytes = IMAP->cached_body_len - pstart;
729 cprintf("BODY[%s]<" SIZE_T_FMT "> {" SIZE_T_FMT "}\r\n", ChrPtr(section), pstart, pbytes);
732 FreeStrBuf(&partial);
734 /* Here we go -- output it */
735 client_write(&IMAP->cached_body[pstart], pbytes);
738 CtdlFreeMessage(msg);
741 /* Mark this message as "seen" *unless* this is a "peek" operation */
743 CtdlSetSeen(&msgnum, 1, 1, ctdlsetseen_seen, NULL, NULL);
745 FreeStrBuf(§ion);
749 * Called immediately before outputting a multipart bodystructure
751 void imap_fetch_bodystructure_pre(
752 char *name, char *filename, char *partnum, char *disp,
753 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
754 char *cbid, void *cbuserdata
763 * Called immediately after outputting a multipart bodystructure
765 void imap_fetch_bodystructure_post(
766 char *name, char *filename, char *partnum, char *disp,
767 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
768 char *cbid, void *cbuserdata
776 extract_token(subtype, cbtype, 1, '/', sizeof subtype);
777 plain_imap_strout(subtype);
780 /* cprintf(" NIL"); We thought we needed this at one point, but maybe we don't... */
788 * Output the info for a MIME part in the format required by BODYSTRUCTURE.
791 void imap_fetch_bodystructure_part(
792 char *name, char *filename, char *partnum, char *disp,
793 void *content, char *cbtype, char *cbcharset, size_t length, char *encoding,
794 char *cbid, void *cbuserdata
798 int have_encoding = 0;
801 char cbmaintype[128];
804 if (cbtype != NULL) if (!IsEmptyStr(cbtype)) have_cbtype = 1;
806 extract_token(cbmaintype, cbtype, 0, '/', sizeof cbmaintype);
807 extract_token(cbsubtype, cbtype, 1, '/', sizeof cbsubtype);
810 strcpy(cbmaintype, "TEXT");
811 strcpy(cbsubtype, "PLAIN");
815 plain_imap_strout(cbmaintype); /* body type */
817 plain_imap_strout(cbsubtype); /* body subtype */
820 cprintf("("); /* begin body parameter list */
822 /* "NAME" must appear as the first parameter. This is not required by IMAP,
823 * but the Asterisk voicemail application blindly assumes that NAME will be in
824 * the first position. If it isn't, it rejects the message.
826 if (name != NULL) if (!IsEmptyStr(name)) {
827 cprintf("\"NAME\" ");
828 plain_imap_strout(name);
832 cprintf("\"CHARSET\" ");
833 if (cbcharset == NULL) {
834 plain_imap_strout("US-ASCII");
836 else if (cbcharset[0] == 0) {
837 plain_imap_strout("US-ASCII");
840 plain_imap_strout(cbcharset);
842 cprintf(") "); /* end body parameter list */
844 cprintf("NIL "); /* Body ID */
845 cprintf("NIL "); /* Body description */
847 if (encoding != NULL) if (encoding[0] != 0) have_encoding = 1;
849 plain_imap_strout(encoding);
852 plain_imap_strout("7BIT");
856 /* The next field is the size of the part in bytes. */
857 cprintf("%ld ", (long)length); /* bytes */
859 /* The next field is the number of lines in the part, if and only
860 * if the part is TEXT. More gratuitous complexity.
862 if (!strcasecmp(cbmaintype, "TEXT")) {
863 if (length) for (i=0; i<length; ++i) {
864 if (((char *)content)[i] == '\n') ++lines;
866 cprintf("%d ", lines);
869 /* More gratuitous complexity */
870 if ((!strcasecmp(cbmaintype, "MESSAGE"))
871 && (!strcasecmp(cbsubtype, "RFC822"))) {
872 /* FIXME: message/rfc822 also needs to output the envelope structure,
873 * body structure, and line count of the encapsulated message. Fortunately
874 * there are not yet any clients depending on this, so we can get away
875 * with not implementing it for now.
879 /* MD5 value of body part; we can get away with NIL'ing this */
886 else if (IsEmptyStr(disp)) {
891 plain_imap_strout(disp);
892 if (filename != NULL) if (!IsEmptyStr(filename)) {
893 cprintf(" (\"FILENAME\" ");
894 plain_imap_strout(filename);
900 /* Body language (not defined yet) */
907 * Spew the BODYSTRUCTURE data for a message.
910 void imap_fetch_bodystructure (long msgnum, const char *item,
911 struct CtdlMessage *msg) {
912 const char *rfc822 = NULL;
913 const char *rfc822_body = NULL;
915 size_t rfc822_headers_len;
916 size_t rfc822_body_len;
917 const char *ptr = NULL;
922 /* Handle NULL message gracefully */
924 cprintf("BODYSTRUCTURE (\"TEXT\" \"PLAIN\" "
925 "(\"CHARSET\" \"US-ASCII\") NIL NIL "
930 /* For non-RFC822 (ordinary Citadel) messages, this is short and
933 if (msg->cm_format_type != FMT_RFC822) {
935 /* *sigh* We have to RFC822-format the message just to be able
936 * to measure it. FIXME use smi cached fields if possible
939 CC->redirect_buffer = NewStrBufPlain(NULL, SIZ);
940 CtdlOutputPreLoadedMsg(msg, MT_RFC822, 0, 0, 1, SUPPRESS_ENV_TO);
941 rfc822_len = StrLength(CC->redirect_buffer);
942 rfc822 = pch = SmashStrBuf(&CC->redirect_buffer);
946 ptr = cmemreadline(ptr, buf, sizeof buf);
948 if ((IsEmptyStr(buf)) && (rfc822_body == NULL)) {
953 rfc822_headers_len = rfc822_body - rfc822;
954 rfc822_body_len = rfc822_len - rfc822_headers_len;
957 cprintf("BODYSTRUCTURE (\"TEXT\" \"PLAIN\" "
958 "(\"CHARSET\" \"US-ASCII\") NIL NIL "
959 "\"7BIT\" " SIZE_T_FMT " %d)", rfc822_body_len, lines);
964 /* For messages already stored in RFC822 format, we have to parse. */
965 cprintf("BODYSTRUCTURE ");
966 mime_parser(msg->cm_fields['M'],
968 *imap_fetch_bodystructure_part, /* part */
969 *imap_fetch_bodystructure_pre, /* pre-multi */
970 *imap_fetch_bodystructure_post, /* post-multi */
972 1); /* don't decode -- we want it as-is */
977 * imap_do_fetch() calls imap_do_fetch_msg() to output the data of an
978 * individual message, once it has been selected for output.
980 void imap_do_fetch_msg(int seq, citimap_command *Cmd) {
982 citimap *Imap = IMAP;
983 struct CtdlMessage *msg = NULL;
986 /* Don't attempt to fetch bogus messages or UID's */
988 if (Imap->msgids[seq-1] < 1L) return;
991 cprintf("* %d FETCH (", seq);
993 for (i=0; i<Cmd->num_parms; ++i) {
995 /* Fetchable without going to the message store at all */
996 if (!strcasecmp(Cmd->Params[i].Key, "UID")) {
999 else if (!strcasecmp(Cmd->Params[i].Key, "FLAGS")) {
1000 imap_fetch_flags(seq-1);
1003 /* Potentially fetchable from cache, if the client requests
1004 * stuff from the same message several times in a row.
1006 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822")) {
1007 imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1009 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.HEADER")) {
1010 imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1012 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.SIZE")) {
1013 imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1015 else if (!strcasecmp(Cmd->Params[i].Key, "RFC822.TEXT")) {
1016 imap_fetch_rfc822(Imap->msgids[seq-1], Cmd->Params[i].Key);
1019 /* BODY fetches do their own fetching and caching too. */
1020 else if (!strncasecmp(Cmd->Params[i].Key, "BODY[", 5)) {
1021 imap_fetch_body(Imap->msgids[seq-1], Cmd->Params[i], 0);
1023 else if (!strncasecmp(Cmd->Params[i].Key, "BODY.PEEK[", 10)) {
1024 imap_fetch_body(Imap->msgids[seq-1], Cmd->Params[i], 1);
1027 /* Otherwise, load the message into memory.
1029 else if (!strcasecmp(Cmd->Params[i].Key, "BODYSTRUCTURE")) {
1030 if ((msg != NULL) && (!body_loaded)) {
1031 CtdlFreeMessage(msg); /* need the whole thing */
1035 msg = CtdlFetchMessage(Imap->msgids[seq-1], 1);
1038 imap_fetch_bodystructure(Imap->msgids[seq-1],
1039 Cmd->Params[i].Key, msg);
1041 else if (!strcasecmp(Cmd->Params[i].Key, "ENVELOPE")) {
1043 msg = CtdlFetchMessage(Imap->msgids[seq-1], 0);
1046 imap_fetch_envelope(msg);
1048 else if (!strcasecmp(Cmd->Params[i].Key, "INTERNALDATE")) {
1050 msg = CtdlFetchMessage(Imap->msgids[seq-1], 0);
1053 imap_fetch_internaldate(msg);
1056 if (i != Cmd->num_parms-1) cprintf(" ");
1062 CtdlFreeMessage(msg);
1069 * imap_fetch() calls imap_do_fetch() to do its actual work, once it's
1070 * validated and boiled down the request a bit.
1072 void imap_do_fetch(citimap_command *Cmd) {
1075 /* debug output the parsed vector */
1078 CtdlLogPrintf(CTDL_DEBUG, "----- %ld params \n",
1081 for (i=0; i < Cmd->num_parms; i++) {
1082 if (Cmd->Params[i].len != strlen(Cmd->Params[i].Key))
1083 CtdlLogPrintf(CTDL_DEBUG, "*********** %ld != %ld : %s\n",
1085 strlen(Cmd->Params[i].Key),
1086 Cmd->Params[i].Key);
1088 CtdlLogPrintf(CTDL_DEBUG, "%ld : %s\n",
1090 Cmd->Params[i].Key);
1095 if (IMAP->num_msgs > 0) {
1096 for (i = 0; i < IMAP->num_msgs; ++i) {
1098 /* Abort the fetch loop if the session breaks.
1099 * This is important for users who keep mailboxes
1100 * that are too big *and* are too impatient to
1101 * let them finish loading. :)
1103 if (CC->kill_me) return;
1105 /* Get any message marked for fetch. */
1106 if (IMAP->flags[i] & IMAP_SELECTED) {
1107 imap_do_fetch_msg(i+1, Cmd);
1116 * Back end for imap_handle_macros()
1117 * Note that this function *only* looks at the beginning of the string. It
1118 * is not a generic search-and-replace function.
1120 void imap_macro_replace(StrBuf *Buf, long where,
1122 char *find, long findlen,
1123 char *replace, long replacelen)
1126 if (StrLength(Buf) - where > findlen)
1129 if (!strncasecmp(ChrPtr(Buf) + where, find, findlen)) {
1130 if (ChrPtr(Buf)[where + findlen] == ' ') {
1131 StrBufPlain(TmpBuf, replace, replacelen);
1132 StrBufAppendBufPlain(TmpBuf, HKEY(" "), 0);
1133 StrBufReplaceToken(Buf, where, findlen,
1136 if (where + findlen == StrLength(Buf)) {
1137 StrBufReplaceToken(Buf, where, findlen,
1138 replace, replacelen);
1146 * Handle macros embedded in FETCH data items.
1147 * (What the heck are macros doing in a wire protocol? Are we trying to save
1148 * the computer at the other end the trouble of typing a lot of characters?)
1150 void imap_handle_macros(citimap_command *Cmd) {
1153 StrBuf *Tmp = NewStrBuf();
1155 for (i=0; i < StrLength(Cmd->CmdBuf); ++i) {
1156 char ch = ChrPtr(Cmd->CmdBuf)[i];
1161 else if ((ch==')') ||
1167 imap_macro_replace(Cmd->CmdBuf, i,
1170 HKEY("FLAGS INTERNALDATE RFC822.SIZE ENVELOPE")
1172 imap_macro_replace(Cmd->CmdBuf, i,
1175 HKEY("BODYSTRUCTURE")
1177 imap_macro_replace(Cmd->CmdBuf, i,
1180 HKEY("FLAGS INTERNALDATE RFC822.SIZE")
1182 imap_macro_replace(Cmd->CmdBuf, i,
1185 HKEY("FLAGS INTERNALDATE RFC822.SIZE ENVELOPE BODY")
1194 * Break out the data items requested, possibly a parenthesized list.
1195 * Returns the number of data items, or -1 if the list is invalid.
1196 * NOTE: this function alters the string it is fed, and uses it as a buffer
1197 * to hold the data for the pointers it returns.
1199 int imap_extract_data_items(citimap_command *Cmd)
1203 const char *pch, *end;
1206 /* Convert all whitespace to ordinary space characters. */
1207 pch = ChrPtr(Cmd->CmdBuf);
1208 end = pch + StrLength(Cmd->CmdBuf);
1213 StrBufPeek(Cmd->CmdBuf, pch, 0, ' ');
1217 /* Strip leading and trailing whitespace, then strip leading and
1218 * trailing parentheses if it's a list
1220 StrBufTrim(Cmd->CmdBuf);
1221 pch = ChrPtr(Cmd->CmdBuf);
1222 if ( (pch[0]=='(') &&
1223 (pch[StrLength(Cmd->CmdBuf)-1]==')') )
1225 StrBufCutRight(Cmd->CmdBuf, 1);
1226 StrBufCutLeft(Cmd->CmdBuf, 1);
1227 StrBufTrim(Cmd->CmdBuf);
1230 /* Parse any macro data items */
1231 imap_handle_macros(Cmd);
1234 * Now break out the data items. We throw in one trailing space in
1235 * order to avoid having to break out the last one manually.
1237 nArgs = StrLength(Cmd->CmdBuf) / 10 + 10;
1238 nArgs = CmdAdjust(Cmd, nArgs, 0);
1239 initial_len = StrLength(Cmd->CmdBuf);
1241 Cmd->Params[Cmd->num_parms].Key = pch = ChrPtr(Cmd->CmdBuf);
1242 end = Cmd->Params[Cmd->num_parms].Key + StrLength(Cmd->CmdBuf);
1252 else if ((*pch==')') ||
1258 if ((nest <= 0) && (*pch==' ')) {
1259 StrBufPeek(Cmd->CmdBuf, pch, 0, '\0');
1260 Cmd->Params[Cmd->num_parms].len =
1261 pch - Cmd->Params[Cmd->num_parms].Key;
1263 if (Cmd->num_parms + 1 >= Cmd->avail_parms) {
1264 nArgs = CmdAdjust(Cmd, nArgs * 2, 1);
1267 Cmd->Params[Cmd->num_parms].Key = ++pch;
1269 else if (pch + 1 == end) {
1270 Cmd->Params[Cmd->num_parms].len =
1271 pch - Cmd->Params[Cmd->num_parms].Key + 1;
1277 return Cmd->num_parms;
1283 * One particularly hideous aspect of IMAP is that we have to allow the client
1284 * to specify arbitrary ranges and/or sets of messages to fetch. Citadel IMAP
1285 * handles this by setting the IMAP_SELECTED flag for each message specified in
1286 * the ranges/sets, then looping through the message array, outputting messages
1287 * with the flag set. We don't bother returning an error if an out-of-range
1288 * number is specified (we just return quietly) because any client braindead
1289 * enough to request a bogus message number isn't going to notice the
1290 * difference anyway.
1292 * This function clears out the IMAP_SELECTED bits, then sets that bit for each
1293 * message included in the specified range.
1295 * Set is_uid to 1 to fetch by UID instead of sequence number.
1297 void imap_pick_range(const char *supplied_range, int is_uid) {
1301 char setstr[SIZ], lostr[SIZ], histr[SIZ];
1303 char actual_range[SIZ];
1307 * Handle the "ALL" macro
1309 if (!strcasecmp(supplied_range, "ALL")) {
1310 safestrncpy(actual_range, "1:*", sizeof actual_range);
1313 safestrncpy(actual_range, supplied_range, sizeof actual_range);
1318 * Clear out the IMAP_SELECTED flags for all messages.
1320 for (i = 0; i < Imap->num_msgs; ++i) {
1321 Imap->flags[i] = Imap->flags[i] & ~IMAP_SELECTED;
1325 * Now set it for all specified messages.
1327 num_sets = num_tokens(actual_range, ',');
1328 for (s=0; s<num_sets; ++s) {
1329 extract_token(setstr, actual_range, s, ',', sizeof setstr);
1331 extract_token(lostr, setstr, 0, ':', sizeof lostr);
1332 if (num_tokens(setstr, ':') >= 2) {
1333 extract_token(histr, setstr, 1, ':', sizeof histr);
1334 if (!strcmp(histr, "*")) snprintf(histr, sizeof histr, "%ld", LONG_MAX);
1337 safestrncpy(histr, lostr, sizeof histr);
1342 /* Loop through the array, flipping bits where appropriate */
1343 for (i = 1; i <= Imap->num_msgs; ++i) {
1344 if (is_uid) { /* fetch by sequence number */
1345 if ( (Imap->msgids[i-1]>=lo)
1346 && (Imap->msgids[i-1]<=hi)) {
1347 Imap->flags[i-1] |= IMAP_SELECTED;
1350 else { /* fetch by uid */
1351 if ( (i>=lo) && (i<=hi)) {
1352 Imap->flags[i-1] |= IMAP_SELECTED;
1362 * This function is called by the main command loop.
1364 void imap_fetch(int num_parms, ConstStr *Params) {
1365 citimap_command Cmd;
1368 if (num_parms < 4) {
1369 cprintf("%s BAD invalid parameters\r\n", Params[0].Key);
1373 imap_pick_range(Params[2].Key, 0);
1375 memset(&Cmd, 0, sizeof(citimap_command));
1376 Cmd.CmdBuf = NewStrBufPlain(NULL, StrLength(IMAP->Cmd.CmdBuf));
1377 MakeStringOf(Cmd.CmdBuf, 3);
1379 num_items = imap_extract_data_items(&Cmd);
1380 if (num_items < 1) {
1381 cprintf("%s BAD invalid data item list\r\n", Params[0].Key);
1382 FreeStrBuf(&Cmd.CmdBuf);
1387 imap_do_fetch(&Cmd);
1388 cprintf("%s OK FETCH completed\r\n", Params[0].Key);
1389 FreeStrBuf(&Cmd.CmdBuf);
1394 * This function is called by the main command loop.
1396 void imap_uidfetch(int num_parms, ConstStr *Params) {
1397 citimap_command Cmd;
1400 int have_uid_item = 0;
1402 if (num_parms < 5) {
1403 cprintf("%s BAD invalid parameters\r\n", Params[0].Key);
1407 imap_pick_range(Params[3].Key, 1);
1409 memset(&Cmd, 0, sizeof(citimap_command));
1410 Cmd.CmdBuf = NewStrBufPlain(NULL, StrLength(IMAP->Cmd.CmdBuf));
1412 MakeStringOf(Cmd.CmdBuf, 4);
1414 CtdlLogPrintf(CTDL_DEBUG, "-------%s--------\n", ChrPtr(Cmd.CmdBuf));
1416 num_items = imap_extract_data_items(&Cmd);
1417 if (num_items < 1) {
1418 cprintf("%s BAD invalid data item list\r\n", Params[0].Key);
1419 FreeStrBuf(&Cmd.CmdBuf);
1424 /* If the "UID" item was not included, we include it implicitly
1425 * (at the beginning) because this is a UID FETCH command
1427 for (i=0; i<num_items; ++i) {
1428 if (!strcasecmp(Cmd.Params[i].Key, "UID")) ++have_uid_item;
1430 if (have_uid_item == 0) {
1431 if (Cmd.num_parms + 1 >= Cmd.avail_parms)
1432 CmdAdjust(&Cmd, Cmd.avail_parms + 1, 1);
1433 memmove(&Cmd.Params[1],
1435 sizeof(ConstStr) * Cmd.num_parms);
1438 Cmd.Params[0] = (ConstStr){HKEY("UID")};
1441 imap_do_fetch(&Cmd);
1442 cprintf("%s OK UID FETCH completed\r\n", Params[0].Key);
1443 FreeStrBuf(&Cmd.CmdBuf);