index/pop3c/pop3c-mail.c

	pop3c-mail.c revision 9f0a996c22ebe39dcfe5cb84c8fd2f22ef5ce9d8
bcb4e51a409d94ae670de96afb8483a4f7855294Stephan Bosch/* Copyright (c) 2011-2012 Dovecot authors, see the included COPYING file */
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen#include "lib.h"
bdd36cfdba3ff66d25570a9ff568d69e1eb543cfTimo Sirainen#include "istream.h"
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen#include "index-mail.h"
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen#include "pop3c-client.h"
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen#include "pop3c-sync.h"
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen#include "pop3c-storage.h"
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainenstatic int pop3c_mail_get_received_date(struct mail *_mail, time_t *date_r)
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen{
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    mail_storage_set_error(_mail->box->storage, MAIL_ERROR_NOTPOSSIBLE,
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen                   "POP3 has no received date");
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    *date_r = (time_t)-1;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    return -1;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen}
d198989a7cac917ba0bd341a76d94e8a32267074Timo Sirainen
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainenstatic int pop3c_mail_get_save_date(struct mail *_mail, time_t *date_r)
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen{
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    mail_storage_set_error(_mail->box->storage, MAIL_ERROR_NOTPOSSIBLE,
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen                   "POP3 has no save date");
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    *date_r = (time_t)-1;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    return -1;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen}
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainenstatic int pop3c_mail_get_physical_size(struct mail *_mail, uoff_t *size_r)
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen{
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    struct index_mail *mail = (struct index_mail *)_mail;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    struct pop3c_mailbox *mbox = (struct pop3c_mailbox *)_mail->box;
af8b1248fed8529d26985460acdc4b1e4b7de675Timo Sirainen    struct message_size hdr_size, body_size;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    struct istream *input;
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen    if (mail->data.virtual_size != 0) {
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen        /* virtual size is already known. it's the same as our
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen           (correct) physical size */
66bcc2a2f65576211f2f55edbe61130b96287fcdTimo Sirainen        *size_r = mail->data.virtual_size;
        return 0;
    }
    if (index_mail_get_physical_size(_mail, size_r) == 0) {
        *size_r = mail->data.physical_size;
        return 0;
    }

    if (_mail->lookup_abort == MAIL_LOOKUP_ABORT_READ_MAIL &&
        (_mail->box->flags & MAILBOX_FLAG_POP3_SESSION) != 0) {
        /* kludge: we want output for POP3 LIST with
           pop3_fast_size_lookups=yes. use the remote's LIST values
           regardless of their correctness */
        if (mbox->msg_sizes == NULL) {
            if (pop3c_sync_get_sizes(mbox) < 0)
                return -1;
        }
        i_assert(_mail->seq <= mbox->msg_count);
        *size_r = mbox->msg_sizes[_mail->seq-1];
        return 0;
    }

    /* slow way: get the whole message body */
    if (mail_get_stream(_mail, &hdr_size, &body_size, &input) < 0)
        return -1;

    i_assert(mail->data.physical_size != (uoff_t)-1);
    *size_r = mail->data.physical_size;
    return 0;
}

static void pop3c_mail_cache_size(struct index_mail *mail)
{
    struct mail *_mail = &mail->mail.mail;
    uoff_t size;
    unsigned int cache_idx;

    if (i_stream_get_size(mail->data.stream, TRUE, &size) <= 0)
        return;
    mail->data.virtual_size = size;

    cache_idx = mail->ibox->cache_fields[MAIL_CACHE_VIRTUAL_FULL_SIZE].idx;
    if (mail_cache_field_exists(_mail->transaction->cache_view,
                    _mail->seq, cache_idx) == 0) {
        index_mail_cache_add_idx(mail, cache_idx, &size, sizeof(size));
        /* make sure it's not cached twice */
        mail->data.dont_cache_fetch_fields |=
            MAIL_CACHE_VIRTUAL_FULL_SIZE;
    }
}

static int
pop3c_mail_get_stream(struct mail *_mail, bool get_body,
              struct message_size *hdr_size,
              struct message_size *body_size, struct istream **stream_r)
{
    struct index_mail *mail = (struct index_mail *)_mail;
    struct pop3c_mailbox *mbox = (struct pop3c_mailbox *)_mail->box;
    enum pop3c_capability capa;
    const char *name, *cmd, *error;
    struct istream *input;

    if (get_body && mail->data.stream != NULL) {
        name = i_stream_get_name(mail->data.stream);
        if (strncmp(name, "RETR", 4) == 0) {
            /* we've fetched the body */
        } else if (strncmp(name, "TOP", 3) == 0) {
            /* we've fetched the header, but we need the body
               now too */
            index_mail_close_streams(mail);
        } else {
            i_panic("Unexpected POP3 stream name: %s", name);
        }
    }

    if (mail->data.stream == NULL) {
        capa = pop3c_client_get_capabilities(mbox->client);
        if (get_body || (capa & POP3C_CAPABILITY_TOP) == 0)
            cmd = t_strdup_printf("RETR %u\r\n", _mail->seq);
        else
            cmd = t_strdup_printf("TOP %u 0\r\n", _mail->seq);
        if (pop3c_client_cmd_stream(mbox->client, cmd,
                        &input, &error) < 0) {
            mail_storage_set_error(mbox->box.storage,
                !pop3c_client_is_connected(mbox->client) ?
                MAIL_ERROR_TEMP : MAIL_ERROR_EXPUNGED, error);
            return -1;
        }
        mail->data.stream = input;
        if (mail->mail.v.istream_opened != NULL) {
            if (mail->mail.v.istream_opened(_mail,
                            &mail->data.stream) < 0) {
                index_mail_close_streams(mail);
                return -1;
            }
        }
        i_stream_set_name(mail->data.stream, t_strcut(cmd, '\r'));
        pop3c_mail_cache_size(mail);
    }
    return index_mail_init_stream(mail, hdr_size, body_size, stream_r);
}

static int
pop3c_mail_get_special(struct mail *_mail, enum mail_fetch_field field,
               const char **value_r)
{
    struct pop3c_mailbox *mbox = (struct pop3c_mailbox *)_mail->box;

    switch (field) {
    case MAIL_FETCH_UIDL_BACKEND:
        if (mbox->msg_uidls == NULL) {
            if (pop3c_sync_get_uidls(mbox) < 0)
                return -1;
        }
        i_assert(_mail->seq <= mbox->msg_count);
        *value_r = mbox->msg_uidls[_mail->seq-1];
        return 0;
    default:
        return index_mail_get_special(_mail, field, value_r);
    }
}

struct mail_vfuncs pop3c_mail_vfuncs = {
    index_mail_close,
    index_mail_free,
    index_mail_set_seq,
    index_mail_set_uid,
    index_mail_set_uid_cache_updates,
    index_mail_prefetch,
    index_mail_precache,
    index_mail_add_temp_wanted_fields,

    index_mail_get_flags,
    index_mail_get_keywords,
    index_mail_get_keyword_indexes,
    index_mail_get_modseq,
    index_mail_get_parts,
    index_mail_get_date,
    pop3c_mail_get_received_date,
    pop3c_mail_get_save_date,
    index_mail_get_virtual_size,
    pop3c_mail_get_physical_size,
    index_mail_get_first_header,
    index_mail_get_headers,
    index_mail_get_header_stream,
    pop3c_mail_get_stream,
    pop3c_mail_get_special,
    index_mail_get_real_mail,
    index_mail_update_flags,
    index_mail_update_keywords,
    index_mail_update_modseq,
    NULL,
    index_mail_expunge,
    index_mail_set_cache_corrupted,
    index_mail_opened
};