void *
mutt_hcache_fetch(header_cache_t *h, const char *filename,
size_t(*keylen) (const char *fn))
{
void* data;
data = mutt_hcache_fetch_raw (h, filename, keylen);
if (!data || !crc_matches(data, h->crc))
{
FREE(&data);
return NULL;
}
return data;
}
/* imap_read_headers:
* Changed to read many headers instead of just one. It will return the
* msgno of the last message read. It will return a value other than
* msgend if mail comes in while downloading headers (in theory).
*/
int imap_read_headers (IMAP_DATA* idata, int msgbegin, int msgend)
{
CONTEXT* ctx;
char *hdrreq = NULL;
FILE *fp;
char tempfile[_POSIX_PATH_MAX];
int msgno, idx = msgbegin - 1;
IMAP_HEADER h;
IMAP_STATUS* status;
int rc, mfhrc, oldmsgcount;
int fetchlast = 0;
int maxuid = 0;
static const char * const want_headers = "DATE FROM SUBJECT TO CC MESSAGE-ID REFERENCES CONTENT-TYPE CONTENT-DESCRIPTION IN-REPLY-TO REPLY-TO LINES LIST-POST X-LABEL";
progress_t progress;
int retval = -1;
#if USE_HCACHE
char buf[LONG_STRING];
unsigned int *uid_validity = NULL;
unsigned int *puidnext = NULL;
unsigned int uidnext = 0;
int evalhc = 0;
#endif /* USE_HCACHE */
ctx = idata->ctx;
if (mutt_bit_isset (idata->capabilities,IMAP4REV1))
{
safe_asprintf (&hdrreq, "BODY.PEEK[HEADER.FIELDS (%s%s%s)]",
want_headers, ImapHeaders ? " " : "", NONULL (ImapHeaders));
}
else if (mutt_bit_isset (idata->capabilities,IMAP4))
{
safe_asprintf (&hdrreq, "RFC822.HEADER.LINES (%s%s%s)",
want_headers, ImapHeaders ? " " : "", NONULL (ImapHeaders));
}
else
{ /* Unable to fetch headers for lower versions */
mutt_error _("Unable to fetch headers from this IMAP server version.");
mutt_sleep (2); /* pause a moment to let the user see the error */
goto error_out_0;
}
/* instead of downloading all headers and then parsing them, we parse them
* as they come in. */
mutt_mktemp (tempfile, sizeof (tempfile));
if (!(fp = safe_fopen (tempfile, "w+")))
{
mutt_error (_("Could not create temporary file %s"), tempfile);
mutt_sleep (2);
goto error_out_0;
}
unlink (tempfile);
/* make sure context has room to hold the mailbox */
while ((msgend) >= idata->ctx->hdrmax)
mx_alloc_memory (idata->ctx);
oldmsgcount = ctx->msgcount;
idata->reopen &= ~(IMAP_REOPEN_ALLOW|IMAP_NEWMAIL_PENDING);
idata->newMailCount = 0;
#if USE_HCACHE
idata->hcache = imap_hcache_open (idata, NULL);
if (idata->hcache && !msgbegin)
{
uid_validity = mutt_hcache_fetch_raw (idata->hcache, "/UIDVALIDITY", imap_hcache_keylen);
puidnext = mutt_hcache_fetch_raw (idata->hcache, "/UIDNEXT", imap_hcache_keylen);
if (puidnext)
{
uidnext = *puidnext;
FREE (&puidnext);
}
if (uid_validity && uidnext && *uid_validity == idata->uid_validity)
evalhc = 1;
FREE (&uid_validity);
}
if (evalhc)
{
/* L10N:
Comparing the cached data with the IMAP server's data */
mutt_progress_init (&progress, _("Evaluating cache..."),
MUTT_PROGRESS_MSG, ReadInc, msgend + 1);
snprintf (buf, sizeof (buf),
"UID FETCH 1:%u (UID FLAGS)", uidnext - 1);
imap_cmd_start (idata, buf);
rc = IMAP_CMD_CONTINUE;
for (msgno = msgbegin; rc == IMAP_CMD_CONTINUE; msgno++)
{
mutt_progress_update (&progress, msgno + 1, -1);
memset (&h, 0, sizeof (h));
h.data = safe_calloc (1, sizeof (IMAP_HEADER_DATA));
do
{
mfhrc = 0;
rc = imap_cmd_step (idata);
if (rc != IMAP_CMD_CONTINUE)
{
imap_free_header_data (&h.data);
break;
}
/* hole in the header cache */
if (!evalhc)
continue;
if ((mfhrc = msg_fetch_header (ctx, &h, idata->buf, NULL)) == -1)
continue;
else if (mfhrc < 0)
{
imap_free_header_data (&h.data);
break;
}
if (!h.data->uid)
{
dprint (2, (debugfile, "imap_read_headers: skipping hcache FETCH "
"response for unknown message number %d\n", h.sid));
mfhrc = -1;
continue;
}
idx++;
ctx->hdrs[idx] = imap_hcache_get (idata, h.data->uid);
if (ctx->hdrs[idx])
{
ctx->hdrs[idx]->index = idx;
/* messages which have not been expunged are ACTIVE (borrowed from mh
* folders) */
ctx->hdrs[idx]->active = 1;
ctx->hdrs[idx]->read = h.data->read;
ctx->hdrs[idx]->old = h.data->old;
ctx->hdrs[idx]->deleted = h.data->deleted;
ctx->hdrs[idx]->flagged = h.data->flagged;
ctx->hdrs[idx]->replied = h.data->replied;
ctx->hdrs[idx]->changed = h.data->changed;
/* ctx->hdrs[msgno]->received is restored from mutt_hcache_restore */
ctx->hdrs[idx]->data = (void *) (h.data);
ctx->msgcount++;
ctx->size += ctx->hdrs[idx]->content->length;
}
else
{
/* bad header in the cache, we'll have to refetch. */
dprint (3, (debugfile, "bad cache entry at %d, giving up\n", h.sid - 1));
imap_free_header_data(&h.data);
evalhc = 0;
idx--;
}
}
while (rc != IMAP_CMD_OK && mfhrc == -1);
if (rc == IMAP_CMD_OK)
break;
if ((mfhrc < -1) || ((rc != IMAP_CMD_CONTINUE) && (rc != IMAP_CMD_OK)))
{
imap_free_header_data (&h.data);
imap_hcache_close (idata);
goto error_out_1;
}
}
/* could also look for first null header in case hcache is holey */
msgbegin = ctx->msgcount;
}
#endif /* USE_HCACHE */
mutt_progress_init (&progress, _("Fetching message headers..."),
MUTT_PROGRESS_MSG, ReadInc, msgend + 1);
for (msgno = msgbegin; msgno <= msgend ; msgno++)
{
mutt_progress_update (&progress, msgno + 1, -1);
/* we may get notification of new mail while fetching headers */
if (msgno + 1 > fetchlast)
{
char *cmd;
fetchlast = msgend + 1;
safe_asprintf (&cmd, "FETCH %d:%d (UID FLAGS INTERNALDATE RFC822.SIZE %s)",
msgno + 1, fetchlast, hdrreq);
imap_cmd_start (idata, cmd);
FREE (&cmd);
}
rewind (fp);
memset (&h, 0, sizeof (h));
h.data = safe_calloc (1, sizeof (IMAP_HEADER_DATA));
/* this DO loop does two things:
* 1. handles untagged messages, so we can try again on the same msg
* 2. fetches the tagged response at the end of the last message.
*/
do
{
mfhrc = 0;
rc = imap_cmd_step (idata);
if (rc != IMAP_CMD_CONTINUE)
break;
if ((mfhrc = msg_fetch_header (ctx, &h, idata->buf, fp)) == -1)
continue;
else if (mfhrc < 0)
break;
if (!ftello (fp))
{
dprint (2, (debugfile, "msg_fetch_header: ignoring fetch response with no body\n"));
mfhrc = -1;
msgend--;
continue;
}
/* make sure we don't get remnants from older larger message headers */
fputs ("\n\n", fp);
idx++;
if (idx > msgend)
{
dprint (1, (debugfile, "imap_read_headers: skipping FETCH response for "
"unknown message number %d\n", h.sid));
mfhrc = -1;
idx--;
continue;
}
/* May receive FLAGS updates in a separate untagged response (#2935) */
if (idx < ctx->msgcount)
{
dprint (2, (debugfile, "imap_read_headers: message %d is not new\n",
h.sid));
idx--;
continue;
}
ctx->hdrs[idx] = mutt_new_header ();
ctx->hdrs[idx]->index = h.sid - 1;
/* messages which have not been expunged are ACTIVE (borrowed from mh
* folders) */
ctx->hdrs[idx]->active = 1;
ctx->hdrs[idx]->read = h.data->read;
ctx->hdrs[idx]->old = h.data->old;
ctx->hdrs[idx]->deleted = h.data->deleted;
ctx->hdrs[idx]->flagged = h.data->flagged;
ctx->hdrs[idx]->replied = h.data->replied;
ctx->hdrs[idx]->changed = h.data->changed;
ctx->hdrs[idx]->received = h.received;
ctx->hdrs[idx]->data = (void *) (h.data);
if (maxuid < h.data->uid)
maxuid = h.data->uid;
rewind (fp);
/* NOTE: if Date: header is missing, mutt_read_rfc822_header depends
* on h.received being set */
ctx->hdrs[idx]->env = mutt_read_rfc822_header (fp, ctx->hdrs[idx],
0, 0);
/* content built as a side-effect of mutt_read_rfc822_header */
ctx->hdrs[idx]->content->length = h.content_length;
ctx->size += h.content_length;
#if USE_HCACHE
imap_hcache_put (idata, ctx->hdrs[idx]);
#endif /* USE_HCACHE */
ctx->msgcount++;
}
while ((rc != IMAP_CMD_OK) && ((mfhrc == -1) ||
((msgno + 1) >= fetchlast)));
if ((mfhrc < -1) || ((rc != IMAP_CMD_CONTINUE) && (rc != IMAP_CMD_OK)))
{
imap_free_header_data (&h.data);
#if USE_HCACHE
imap_hcache_close (idata);
#endif
goto error_out_1;
}
/* in case we get new mail while fetching the headers */
if (idata->reopen & IMAP_NEWMAIL_PENDING)
{
msgend = idata->newMailCount - 1;
while ((msgend) >= ctx->hdrmax)
mx_alloc_memory (ctx);
idata->reopen &= ~IMAP_NEWMAIL_PENDING;
idata->newMailCount = 0;
}
}
if (maxuid && (status = imap_mboxcache_get (idata, idata->mailbox, 0)) &&
(status->uidnext < maxuid + 1))
status->uidnext = maxuid + 1;
#if USE_HCACHE
mutt_hcache_store_raw (idata->hcache, "/UIDVALIDITY", &idata->uid_validity,
sizeof (idata->uid_validity), imap_hcache_keylen);
if (maxuid && idata->uidnext < maxuid + 1)
{
dprint (2, (debugfile, "Overriding UIDNEXT: %u -> %u\n", idata->uidnext, maxuid + 1));
idata->uidnext = maxuid + 1;
}
if (idata->uidnext > 1)
mutt_hcache_store_raw (idata->hcache, "/UIDNEXT", &idata->uidnext,
sizeof (idata->uidnext), imap_hcache_keylen);
imap_hcache_close (idata);
#endif /* USE_HCACHE */
if (ctx->msgcount > oldmsgcount)
{
mx_alloc_memory(ctx);
mx_update_context (ctx, ctx->msgcount - oldmsgcount);
}
idata->reopen |= IMAP_REOPEN_ALLOW;
retval = msgend;
error_out_1:
safe_fclose (&fp);
error_out_0:
FREE (&hdrreq);
return retval;
}