#include "msgbase.h"
#include "tools.h"
#include "internet_addressing.h"
+#include "mime_parser.h"
#include "serv_imap.h"
#include "imap_tools.h"
#include "imap_fetch.h"
+struct imap_fetch_part {
+ char desired_section[256];
+ FILE *output_fp;
+};
+
/*
* Individual field functions for imap_do_fetch_msg() ...
*/
cprintf("UID %ld", IMAP->msgids[seq-1]);
}
+void imap_fetch_flags(struct CtdlMessage *msg) {
+ cprintf("FLAGS ()"); /* FIXME do something here */
+}
+
void imap_fetch_internaldate(struct CtdlMessage *msg) {
char buf[256];
time_t msgdate;
}
+/*
+ * Fetch RFC822-formatted messages.
+ *
+ * 'whichfmt' should be set to one of:
+ * "RFC822" entire message
+ * "RFC822.HEADER" headers only (with trailing blank line)
+ * "RFC822.SIZE" size of translated message
+ * "RFC822.TEXT" body only (without leading blank line)
+ */
+void imap_fetch_rfc822(int msgnum, char *whichfmt, struct CtdlMessage *msg) {
+ FILE *tmp;
+ char buf[1024];
+ char *ptr;
+ long headers_size, text_size, total_size;
+ long bytes_remaining = 0;
+ long blocksize;
+
+ tmp = tmpfile();
+ if (tmp == NULL) {
+ lprintf(1, "Cannot open temp file: %s\n", strerror(errno));
+ return;
+ }
+
+ /*
+ * Load the message into a temp file for translation and measurement
+ */
+ CtdlRedirectOutput(tmp, -1);
+ CtdlOutputPreLoadedMsg(msg, msgnum, MT_RFC822, 0, 0, 1);
+ CtdlRedirectOutput(NULL, -1);
+ if (!is_valid_message(msg)) {
+ lprintf(1, "WARNING: output clobbered the message!\n");
+ }
+
+ /*
+ * Now figure out where the headers/text break is. IMAP considers the
+ * intervening blank line to be part of the headers, not the text.
+ */
+ rewind(tmp);
+ headers_size = 0L;
+ do {
+ ptr = fgets(buf, sizeof buf, tmp);
+ if (ptr != NULL) {
+ striplt(buf);
+ if (strlen(buf) == 0) headers_size = ftell(tmp);
+ }
+ } while ( (headers_size == 0L) && (ptr != NULL) );
+ fseek(tmp, 0L, SEEK_END);
+ total_size = ftell(tmp);
+ text_size = total_size - headers_size;
+
+ if (!strcasecmp(whichfmt, "RFC822.SIZE")) {
+ cprintf("RFC822.SIZE %ld", total_size);
+ fclose(tmp);
+ return;
+ }
+
+ else if (!strcasecmp(whichfmt, "RFC822")) {
+ bytes_remaining = total_size;
+ rewind(tmp);
+ }
+
+ else if (!strcasecmp(whichfmt, "RFC822.HEADER")) {
+ bytes_remaining = headers_size;
+ rewind(tmp);
+ }
+
+ else if (!strcasecmp(whichfmt, "RFC822.TEXT")) {
+ bytes_remaining = text_size;
+ fseek(tmp, headers_size, SEEK_SET);
+ }
+
+ cprintf("%s {%ld}\r\n", whichfmt, bytes_remaining);
+ blocksize = sizeof(buf);
+ while (bytes_remaining > 0L) {
+ if (blocksize > bytes_remaining) blocksize = bytes_remaining;
+ fread(buf, blocksize, 1, tmp);
+ client_write(buf, blocksize);
+ bytes_remaining = bytes_remaining - blocksize;
+ }
+
+ fclose(tmp);
+}
+
+
+
+/*
+ * Load a specific part of a message into the temp file to be output to a
+ * client. FIXME we can handle parts like "2" and "2.1" and even "2.MIME"
+ * but we still can't handle "2.HEADER" (which might not be a problem, because
+ * we currently don't have the ability to break out nested RFC822's anyway).
+ *
+ * Note: mime_parser() was called with dont_decode set to 1, so we have the
+ * luxury of simply spewing without having to re-encode.
+ */
+void imap_load_part(char *name, char *filename, char *partnum, char *disp,
+ void *content, char *cbtype, size_t length, char *encoding,
+ void *cbuserdata)
+{
+ struct imap_fetch_part *imfp;
+ char mbuf2[1024];
+
+ imfp = (struct imap_fetch_part *)cbuserdata;
+
+ if (!strcasecmp(partnum, imfp->desired_section)) {
+ fwrite(content, length, 1, imfp->output_fp);
+ }
+
+ sprintf(mbuf2, "%s.MIME", partnum);
+
+ if (!strcasecmp(imfp->desired_section, mbuf2)) {
+ fprintf(imfp->output_fp, "Content-type: %s", cbtype);
+ if (strlen(name) > 0)
+ fprintf(imfp->output_fp, "; name=\"%s\"", name);
+ fprintf(imfp->output_fp, "\r\n");
+ if (strlen(encoding) > 0)
+ fprintf(imfp->output_fp,
+ "Content-Transfer-Encoding: %s\r\n", encoding);
+ if (strlen(encoding) > 0) {
+ fprintf(imfp->output_fp, "Content-Disposition: %s",
+ disp);
+ if (strlen(filename) > 0) {
+ fprintf(imfp->output_fp, "; filename=\"%s\"",
+ filename);
+ }
+ fprintf(imfp->output_fp, "\r\n");
+ }
+ fprintf(imfp->output_fp, "Content-Length: %d\r\n", length);
+ fprintf(imfp->output_fp, "\r\n");
+ }
+
+
+}
+
+
+/*
+ * Called by imap_fetch_envelope() to output the "From" field.
+ * This is in its own function because its logic is kind of complex. We
+ * really need to make this suck less.
+ */
+void imap_output_envelope_from(struct CtdlMessage *msg) {
+ char user[1024], node[1024], name[1024];
+
+ cprintf("(("); /* open double-parens */
+ imap_strout(msg->cm_fields['A']); /* personal name */
+ cprintf(" NIL "); /* source route (not used) */
+
+ if (msg->cm_fields['F'] != NULL) {
+ process_rfc822_addr(msg->cm_fields['F'], user, node, name);
+ imap_strout(user); /* mailbox name (user id) */
+ cprintf(" ");
+ if (!strcasecmp(node, config.c_nodename)) {
+ imap_strout(config.c_fqdn);
+ }
+ else {
+ imap_strout(node); /* host name */
+ }
+ }
+ else {
+ imap_strout(msg->cm_fields['A']); /* mailbox name (user id) */
+ cprintf(" ");
+ imap_strout(msg->cm_fields['N']); /* host name */
+ }
+
+ cprintf(")) "); /* close double-parens */
+}
+
+
+/*
+ * Implements the ENVELOPE fetch item
+ *
+ * FIXME ... we only output some of the fields right now. Definitely need
+ * to do all of them. Accurately, too.
+ *
+ * Note that the imap_strout() function can cleverly output NULL fields as NIL,
+ * so we don't have to check for that condition like we do elsewhere.
+ */
+void imap_fetch_envelope(long msgnum, struct CtdlMessage *msg) {
+ char datestringbuf[256];
+ time_t msgdate;
+ char *fieldptr = NULL;
+
+ /* Parse the message date into an IMAP-format date string */
+ if (msg->cm_fields['T'] != NULL) {
+ msgdate = atol(msg->cm_fields['T']);
+ }
+ else {
+ msgdate = time(NULL);
+ }
+ datestring(datestringbuf, msgdate, DATESTRING_IMAP);
+
+ /* Now start spewing data fields. The order is important, as it is
+ * defined by the protocol specification. Nonexistent fields must
+ * be output as NIL, existent fields must be quoted or literalled.
+ * The imap_strout() function conveniently does all this for us.
+ */
+ cprintf("ENVELOPE (");
+
+ /* Date */
+ imap_strout(datestringbuf);
+ cprintf(" ");
+
+ /* Subject */
+ imap_strout(msg->cm_fields['U']);
+ cprintf(" ");
+
+ /* From */
+ imap_output_envelope_from(msg);
+
+ /* Sender */
+ if (0) {
+ /* FIXME ... check for a *real* Sender: field */
+ }
+ else {
+ imap_output_envelope_from(msg);
+ }
+
+ /* Reply-to */
+ if (0) {
+ /* FIXME ... check for a *real* Reply-to: field */
+ }
+ else {
+ imap_output_envelope_from(msg);
+ }
+
+ cprintf("NIL "); /* to */
+
+ cprintf("NIL "); /* cc */
+
+ cprintf("NIL "); /* bcc */
+
+ /* In-reply-to */
+ fieldptr = rfc822_fetch_field(msg->cm_fields['M'], "In-reply-to");
+ imap_strout(fieldptr);
+ cprintf(" ");
+ if (fieldptr != NULL) phree(fieldptr);
+
+ /* message ID */
+ imap_strout(msg->cm_fields['I']);
+
+ cprintf(") ");
+}
+
+
+/*
+ * Strip any non header information out of a chunk of RFC822 data on disk
+ */
+void imap_strip_headers(FILE *fp) {
+ char buf[1024];
+
+ rewind(fp);
+ while (fgets(buf, sizeof buf, fp) != NULL) {
+ striplt(buf);
+ if (strlen(buf) == 0) {
+ fflush(fp);
+ ftruncate(fileno(fp), ftell(fp));
+ }
+ }
+ fflush(fp);
+ fprintf(fp, "\r\n"); /* add the trailing newline */
+ rewind(fp);
+}
+
+
+/*
+ * Implements the BODY and BODY.PEEK fetch items
+ */
+void imap_fetch_body(long msgnum, char *item, int is_peek,
+ struct CtdlMessage *msg) {
+ char section[1024];
+ char partial[1024];
+ int is_partial = 0;
+ char buf[1024];
+ int i;
+ FILE *tmp;
+ long bytes_remaining = 0;
+ long blocksize;
+ long pstart, pbytes;
+ struct imap_fetch_part imfp;
+
+ /* extract section */
+ strcpy(section, item);
+ for (i=0; i<strlen(section); ++i) {
+ if (section[i]=='[') strcpy(section, §ion[i+1]);
+ }
+ for (i=0; i<strlen(section); ++i) {
+ if (section[i]==']') section[i] = 0;
+ }
+ lprintf(9, "Section is %s\n", section);
+
+ /* extract partial */
+ strcpy(partial, item);
+ for (i=0; i<strlen(partial); ++i) {
+ if (partial[i]=='<') {
+ strcpy(partial, &partial[i+1]);
+ is_partial = 1;
+ }
+ }
+ for (i=0; i<strlen(partial); ++i) {
+ if (partial[i]=='>') partial[i] = 0;
+ }
+ if (is_partial == 0) strcpy(partial, "");
+ lprintf(9, "Partial is %s\n", partial);
+
+ tmp = tmpfile();
+ if (tmp == NULL) {
+ lprintf(1, "Cannot open temp file: %s\n", strerror(errno));
+ return;
+ }
+
+ /* Now figure out what the client wants, and get it */
+
+ if (!strcmp(section, "")) { /* the whole thing */
+ CtdlRedirectOutput(tmp, -1);
+ CtdlOutputPreLoadedMsg(msg, msgnum, MT_RFC822, 0, 0, 1);
+ CtdlRedirectOutput(NULL, -1);
+ }
+
+ /*
+ * Be obnoxious and send the entire header, even if the client only
+ * asks for certain fields. FIXME this shortcut later.
+ */
+ else if (!strncasecmp(section, "HEADER", 6)) {
+ CtdlRedirectOutput(tmp, -1);
+ CtdlOutputPreLoadedMsg(msg, msgnum, MT_RFC822, 1, 0, 1);
+ CtdlRedirectOutput(NULL, -1);
+ imap_strip_headers(tmp);
+ }
+
+ /*
+ * Anything else must be a part specifier.
+ * (Note value of 1 passed as 'dont_decode' so client gets it encoded)
+ */
+ else {
+ safestrncpy(imfp.desired_section, section,
+ sizeof(imfp.desired_section));
+ imfp.output_fp = tmp;
+
+ mime_parser(msg->cm_fields['M'], NULL,
+ *imap_load_part,
+ (void *)&imfp,
+ 1);
+ }
+
+
+ fseek(tmp, 0L, SEEK_END);
+ bytes_remaining = ftell(tmp);
+
+ if (is_partial == 0) {
+ rewind(tmp);
+ cprintf("BODY[%s] {%ld}\r\n", section, bytes_remaining);
+ }
+ else {
+ sscanf(partial, "%ld.%ld", &pstart, &pbytes);
+ if ((bytes_remaining - pstart) < pbytes) {
+ pbytes = bytes_remaining - pstart;
+ }
+ fseek(tmp, pstart, SEEK_SET);
+ bytes_remaining = pbytes;
+ cprintf("BODY[%s] {%ld}<%ld>\r\n",
+ section, bytes_remaining, pstart);
+ }
+
+ blocksize = sizeof(buf);
+ while (bytes_remaining > 0L) {
+ if (blocksize > bytes_remaining) blocksize = bytes_remaining;
+ fread(buf, blocksize, 1, tmp);
+ client_write(buf, blocksize);
+ bytes_remaining = bytes_remaining - blocksize;
+ }
+
+ fclose(tmp);
+
+ if (is_peek) {
+ /* FIXME set the last read pointer or something */
+ }
+}
+
+
+/*
+ * Spew the BODYSTRUCTURE data for a message. (Do you need a silencer if
+ * you're going to shoot a MIME? Do you need a reason to shoot Mark Crispin?
+ * No, and no.)
+ *
+ * FIXME finish the implementation
+ */
+void imap_fetch_bodystructure (long msgnum, char *item,
+ struct CtdlMessage *msg) {
+ FILE *tmp;
+ char buf[1024];
+ long lines = 0L;
+ long bytes = 0L;
+
+
+ /* For non-RFC822 (ordinary Citadel) messages, this is short and
+ * sweet...
+ */
+ if (msg->cm_format_type != FMT_RFC822) {
+
+ /* *sigh* We have to RFC822-format the message just to be able
+ * to measure it.
+ */
+ tmp = tmpfile();
+ if (tmp == NULL) return;
+ CtdlRedirectOutput(tmp, -1);
+ CtdlOutputPreLoadedMsg(msg, msgnum, MT_RFC822, 0, 0, 1);
+ CtdlRedirectOutput(NULL, -1);
+
+ rewind(tmp);
+ while (fgets(buf, sizeof buf, tmp) != NULL) ++lines;
+ bytes = ftell(tmp);
+ fclose(tmp);
+
+ cprintf("BODYSTRUCTURE (\"TEXT\" \"PLAIN\" "
+ "(\"CHARSET\" \"US-ASCII\") NIL NIL "
+ "\"7BIT\" %ld %ld) ", bytes, lines);
+
+ return;
+ }
+
+ /* For messages already stored in RFC822 format, we have to parse. */
+ /* FIXME do this! */
+
+
+}
+
+
+
+
+
+
/*
* imap_do_fetch() calls imap_do_fetch_msg() to output the deta of an
* individual message, once it has been successfully loaded from disk.
for (i=0; i<num_items; ++i) {
if (!strncasecmp(itemlist[i], "BODY[", 5)) {
- /* FIXME do something here */
+ imap_fetch_body(IMAP->msgids[seq-1], itemlist[i],
+ 0, msg);
}
else if (!strncasecmp(itemlist[i], "BODY.PEEK[", 10)) {
- /* FIXME do something here */
+ imap_fetch_body(IMAP->msgids[seq-1], itemlist[i],
+ 1, msg);
}
else if (!strcasecmp(itemlist[i], "BODYSTRUCTURE")) {
- /* FIXME do something here */
+ imap_fetch_bodystructure(IMAP->msgids[seq-1],
+ itemlist[i], msg);
}
else if (!strcasecmp(itemlist[i], "ENVELOPE")) {
- /* FIXME do something here */
+ imap_fetch_envelope(IMAP->msgids[seq-1], msg);
}
else if (!strcasecmp(itemlist[i], "FLAGS")) {
- /* FIXME do something here */
+ imap_fetch_flags(msg);
}
else if (!strcasecmp(itemlist[i], "INTERNALDATE")) {
imap_fetch_internaldate(msg);
}
else if (!strcasecmp(itemlist[i], "RFC822")) {
- /* FIXME do something here */
+ imap_fetch_rfc822(IMAP->msgids[seq-1], itemlist[i], msg);
}
else if (!strcasecmp(itemlist[i], "RFC822.HEADER")) {
- /* FIXME do something here */
+ imap_fetch_rfc822(IMAP->msgids[seq-1], itemlist[i], msg);
}
else if (!strcasecmp(itemlist[i], "RFC822.SIZE")) {
- /* FIXME do something here */
+ imap_fetch_rfc822(IMAP->msgids[seq-1], itemlist[i], msg);
}
else if (!strcasecmp(itemlist[i], "RFC822.TEXT")) {
- /* FIXME do something here */
+ imap_fetch_rfc822(IMAP->msgids[seq-1], itemlist[i], msg);
}
else if (!strcasecmp(itemlist[i], "UID")) {
imap_fetch_uid(seq);
* imap_fetch() calls imap_do_fetch() to do its actual work, once it's
* validated and boiled down the request a bit.
*/
-void imap_do_fetch(int lo, int hi, int num_items, char **itemlist) {
+void imap_do_fetch(int num_items, char **itemlist) {
int i;
struct CtdlMessage *msg;
- for (i=0; i<num_items; ++i) {
- lprintf(9, "* item[%d] = <%s>\r\n", i, itemlist[i]);
- }
-
- for (i = lo; i <= hi; ++i) {
- msg = CtdlFetchMessage(IMAP->msgids[i-1]);
+ if (IMAP->num_msgs > 0)
+ for (i = 0; i < IMAP->num_msgs; ++i)
+ if (IMAP->flags[i] && IMAP_FETCHED) {
+ msg = CtdlFetchMessage(IMAP->msgids[i]);
if (msg != NULL) {
- imap_do_fetch_msg(i, msg, num_items, itemlist);
+ imap_do_fetch_msg(i+1, msg, num_items, itemlist);
CtdlFreeMessage(msg);
}
else {
- cprintf("* %d FETCH <internal error>\r\n", i);
+ cprintf("* %d FETCH <internal error>\r\n", i+1);
}
}
}
}
+/*
+ * One particularly hideous aspect of IMAP is that we have to allow the client
+ * to specify arbitrary ranges and/or sets of messages to fetch. Citadel IMAP
+ * handles this by setting the IMAP_FETCHED flag for each message specified in
+ * the ranges/sets, then looping through the message array, outputting messages
+ * with the flag set. We don't bother returning an error if an out-of-range
+ * number is specified (we just return quietly) because any client braindead
+ * enough to request a bogus message number isn't going to notice the
+ * difference anyway.
+ *
+ * This function clears out the IMAP_FETCHED bits, then sets that bit for each
+ * message included in the specified range.
+ *
+ * Set is_uid to 1 to fetch by UID instead of sequence number.
+ */
+void imap_pick_range(char *range, int is_uid) {
+ int i;
+ int num_sets;
+ int s;
+ char setstr[1024], lostr[1024], histr[1024];
+ int lo, hi;
+
+ /*
+ * Clear out the IMAP_FETCHED flags for all messages.
+ */
+ for (i = 1; i <= IMAP->num_msgs; ++i) {
+ IMAP->flags[i-1] = IMAP->flags[i-1] & ~IMAP_FETCHED;
+ }
+
+ /*
+ * Now set it for all specified messages.
+ */
+ num_sets = num_tokens(range, ',');
+ for (s=0; s<num_sets; ++s) {
+ extract_token(setstr, range, s, ',');
+
+ extract_token(lostr, setstr, 0, ':');
+ if (num_tokens(setstr, ':') >= 2) {
+ extract_token(histr, setstr, 1, ':');
+ if (!strcmp(histr, "*")) sprintf(histr, "%d", INT_MAX);
+ }
+ else {
+ strcpy(histr, lostr);
+ }
+ lo = atoi(lostr);
+ hi = atoi(histr);
+
+ /* Loop through the array, flipping bits where appropriate */
+ for (i = 1; i <= IMAP->num_msgs; ++i) {
+ if (is_uid) { /* fetch by sequence number */
+ if ( (IMAP->msgids[i-1]>=lo)
+ && (IMAP->msgids[i-1]<=hi)) {
+ IMAP->flags[i-1] =
+ IMAP->flags[i-1] | IMAP_FETCHED;
+ }
+ }
+ else { /* fetch by uid */
+ if ( (i>=lo) && (i<=hi)) {
+ IMAP->flags[i-1] =
+ IMAP->flags[i-1] | IMAP_FETCHED;
+ }
+ }
+ }
+ }
+}
+
+
/*
* This function is called by the main command loop.
*/
void imap_fetch(int num_parms, char *parms[]) {
- int lo = 0;
- int hi = 0;
- char lostr[1024], histr[1024], items[1024];
+ char items[1024];
char *itemlist[256];
int num_items;
int i;
return;
}
- extract_token(lostr, parms[2], 0, ':');
- lo = atoi(lostr);
- extract_token(histr, parms[2], 1, ':');
- hi = atoi(histr);
-
- if ( (lo < 1) || (hi < 1) || (lo > hi) || (hi > IMAP->num_msgs) ) {
- cprintf("%s BAD invalid sequence numbers %d:%d\r\n",
- parms[0], lo, hi);
- return;
- }
+ imap_pick_range(parms[2], 0);
strcpy(items, "");
for (i=3; i<num_parms; ++i) {
return;
}
- imap_do_fetch(lo, hi, num_items, itemlist);
+ imap_do_fetch(num_items, itemlist);
cprintf("%s OK FETCH completed\r\n", parms[0]);
}
+/*
+ * This function is called by the main command loop.
+ */
+void imap_uidfetch(int num_parms, char *parms[]) {
+ char items[1024];
+ char *itemlist[256];
+ int num_items;
+ int i;
+ int have_uid_item = 0;
+
+ if (num_parms < 5) {
+ cprintf("%s BAD invalid parameters\r\n", parms[0]);
+ return;
+ }
+
+ imap_pick_range(parms[3], 1);
+
+ strcpy(items, "");
+ for (i=4; i<num_parms; ++i) {
+ strcat(items, parms[i]);
+ if (i < (num_parms-1)) strcat(items, " ");
+ }
+
+ num_items = imap_extract_data_items(itemlist, items);
+ if (num_items < 1) {
+ cprintf("%s BAD invalid data item list\r\n", parms[0]);
+ return;
+ }
+
+ /* If the "UID" item was not included, we include it implicitly
+ * because this is a UID FETCH command
+ */
+ for (i=0; i<num_items; ++i) {
+ if (!strcasecmp(itemlist[i], "UID")) ++have_uid_item;
+ }
+ if (have_uid_item == 0) itemlist[num_items++] = "UID";
+
+ imap_do_fetch(num_items, itemlist);
+ cprintf("%s OK UID FETCH completed\r\n", parms[0]);
+}
projects / citadel.git / blobdiff