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; }