function attach_init(&$a)
{
if (argc() < 2) {
notice(t('Item not available.') . EOL);
return;
}
$r = attach_by_hash(argv(1), argc() > 2 ? intval(argv(2)) : 0);
if (!$r['success']) {
notice($r['message'] . EOL);
return;
}
$c = q("select channel_address from channel where channel_id = %d limit 1", intval($r['data']['uid']));
if (!$c) {
return;
}
$unsafe_types = array('text/html', 'text/css', 'application/javascript');
if (in_array($r['data']['filetype'], $unsafe_types)) {
header('Content-type: text/plain');
} else {
header('Content-type: ' . $r['data']['filetype']);
}
header('Content-disposition: attachment; filename="' . $r['data']['filename'] . '"');
if ($r['data']['flags'] & ATTACH_FLAG_OS) {
$istream = fopen('store/' . $c[0]['channel_address'] . '/' . $r['data']['data'], 'rb');
$ostream = fopen('php://output', 'wb');
if ($istream && $ostream) {
pipe_streams($istream, $ostream);
fclose($istream);
fclose($ostream);
}
} else {
echo $r['data']['data'];
}
killme();
}
function post()
{
$hash = $_POST['hash'];
$time = $_POST['time'];
$sig = $_POST['signature'];
$resource = $_POST['resource'];
$revision = intval($_POST['revision']);
if (!$hash) {
killme();
}
$channel = channelx_by_hash($hash);
if (!$channel || !$time || !$sig) {
killme();
}
$slop = intval(get_pconfig($channel['channel_id'], 'system', 'getfile_time_slop'));
if ($slop < 1) {
$slop = 3;
}
$d1 = datetime_convert('UTC', 'UTC', "now + {$slop} minutes");
$d2 = datetime_convert('UTC', 'UTC', "now - {$slop} minutes");
if ($time > $d1 || $time < $d2) {
logger('time outside allowable range');
killme();
}
if (!rsa_verify($hash . '.' . $time, base64url_decode($sig), $channel['channel_pubkey'])) {
logger('verify failed.');
killme();
}
$r = attach_by_hash($resource, $revision);
if (!$r['success']) {
notice($r['message'] . EOL);
return;
}
$unsafe_types = array('text/html', 'text/css', 'application/javascript');
if (in_array($r['data']['filetype'], $unsafe_types)) {
header('Content-type: text/plain');
} else {
header('Content-type: ' . $r['data']['filetype']);
}
header('Content-disposition: attachment; filename="' . $r['data']['filename'] . '"');
if (intval($r['data']['os_storage'])) {
$fname = dbunescbin($r['data']['data']);
if (strpos($fname, 'store') !== false) {
$istream = fopen($fname, 'rb');
} else {
$istream = fopen('store/' . $channel['channel_address'] . '/' . $fname, 'rb');
}
$ostream = fopen('php://output', 'wb');
if ($istream && $ostream) {
pipe_streams($istream, $ostream);
fclose($istream);
fclose($ostream);
}
} else {
echo dbunescbin($r['data']['data']);
}
killme();
}
function sync_files($channel, $files)
{
require_once 'include/attach.php';
if ($channel && $files) {
foreach ($files as $f) {
if (!$f) {
continue;
}
$fetch_url = $f['fetch_url'];
$oldbase = dirname($fetch_url);
$original_channel = $f['original_channel'];
if (!($fetch_url && $original_channel)) {
continue;
}
if ($f['attach']) {
$attachment_stored = false;
foreach ($f['attach'] as $att) {
convert_oldfields($att, 'data', 'content');
if ($att['deleted']) {
attach_delete($channel, $att['hash']);
continue;
}
$attach_exists = false;
$x = attach_by_hash($att['hash']);
logger('sync_files duplicate check: attach_exists=' . $attach_exists, LOGGER_DEBUG);
logger('sync_files duplicate check: att=' . print_r($att, true), LOGGER_DEBUG);
logger('sync_files duplicate check: attach_by_hash() returned ' . print_r($x, true), LOGGER_DEBUG);
if ($x['success']) {
$attach_exists = true;
$attach_id = $x[0]['id'];
}
$newfname = 'store/' . $channel['channel_address'] . '/' . get_attach_binname($att['content']);
unset($att['id']);
$att['aid'] = $channel['channel_account_id'];
$att['uid'] = $channel['channel_id'];
// check for duplicate folder names with the same parent.
// If we have a duplicate that doesn't match this hash value
// change the name so that the contents won't be "covered over"
// by the existing directory. Use the same logic we use for
// duplicate files.
if (strpos($att['filename'], '.') !== false) {
$basename = substr($att['filename'], 0, strrpos($att['filename'], '.'));
$ext = substr($att['filename'], strrpos($att['filename'], '.'));
} else {
$basename = $att['filename'];
$ext = '';
}
$r = q("select filename from attach where ( filename = '%s' OR filename like '%s' ) and folder = '%s' and hash != '%s' ", dbesc($basename . $ext), dbesc($basename . '(%)' . $ext), dbesc($att['folder']), dbesc($att['hash']));
if ($r) {
$x = 1;
do {
$found = false;
foreach ($r as $rr) {
if ($rr['filename'] === $basename . '(' . $x . ')' . $ext) {
$found = true;
break;
}
}
if ($found) {
$x++;
}
} while ($found);
$att['filename'] = $basename . '(' . $x . ')' . $ext;
} else {
$att['filename'] = $basename . $ext;
}
// end duplicate detection
// @fixme - update attachment structures if they are modified rather than created
$att['content'] = $newfname;
// Note: we use $att['hash'] below after it has been escaped to
// fetch the file contents.
// If the hash ever contains any escapable chars this could cause
// problems. Currently it does not.
dbesc_array($att);
if ($attach_exists) {
logger('sync_files attach exists: ' . print_r($att, true), LOGGER_DEBUG);
$str = '';
foreach ($att as $k => $v) {
if ($str) {
$str .= ",";
}
$str .= " `" . $k . "` = '" . $v . "' ";
}
$r = dbq("update `attach` set " . $str . " where id = " . intval($attach_id));
} else {
logger('sync_files attach does not exists: ' . print_r($att, true), LOGGER_DEBUG);
$r = dbq("INSERT INTO attach (`" . implode("`, `", array_keys($att)) . "`) VALUES ('" . implode("', '", array_values($att)) . "')");
}
// is this a directory?
if ($att['filetype'] === 'multipart/mixed' && $att['is_dir']) {
os_mkdir($newfname, STORAGE_DEFAULT_PERMISSIONS, true);
$attachment_stored = true;
continue;
} else {
// it's a file
// for the sync version of this algorithm (as opposed to 'offline import')
// we will fetch the actual file from the source server so it can be
// streamed directly to disk and avoid consuming PHP memory if it's a huge
// audio/video file or something.
$time = datetime_convert();
$parr = array('hash' => $channel['channel_hash'], 'time' => $time, 'resource' => $att['hash'], 'revision' => 0, 'signature' => base64url_encode(rsa_sign($channel['channel_hash'] . '.' . $time, $channel['channel_prvkey'])));
$store_path = $newfname;
$fp = fopen($newfname, 'w');
if (!$fp) {
logger('failed to open storage file.', LOGGER_NORMAL, LOG_ERR);
continue;
}
$redirects = 0;
$x = z_post_url($fetch_url, $parr, $redirects, array('filep' => $fp));
fclose($fp);
if ($x['success']) {
$attachment_stored = true;
}
continue;
}
}
}
if (!$attachment_stored) {
// @TODO should we queue this and retry or delete everything or what?
logger('attachment store failed', LOGGER_NORMAL, LOG_ERR);
}
if ($f['photo']) {
foreach ($f['photo'] as $p) {
unset($p['id']);
$p['aid'] = $channel['channel_account_id'];
$p['uid'] = $channel['channel_id'];
convert_oldfields($p, 'data', 'content');
convert_oldfields($p, 'scale', 'imgscale');
convert_oldfields($p, 'size', 'filesize');
convert_oldfields($p, 'type', 'mimetype');
// if this is a profile photo, undo the profile photo bit
// for any other photo which previously held it.
if ($p['photo_usage'] == PHOTO_PROFILE) {
$e = q("update photo set photo_usage = %d where photo_usage = %d\n\t\t\t\t\t\t\tand resource_id != '%s' and uid = %d ", intval(PHOTO_NORMAL), intval(PHOTO_PROFILE), dbesc($p['resource_id']), intval($channel['channel_id']));
}
// same for cover photos
if ($p['photo_usage'] == PHOTO_COVER) {
$e = q("update photo set photo_usage = %d where photo_usage = %d\n\t\t\t\t\t\t\tand resource_id != '%s' and uid = %d ", intval(PHOTO_NORMAL), intval(PHOTO_COVER), dbesc($p['resource_id']), intval($channel['channel_id']));
}
if ($p['imgscale'] === 0 && $p['os_storage']) {
$p['content'] = $store_path;
} else {
$p['content'] = base64_decode($p['content']);
}
$exists = q("select * from photo where resource_id = '%s' and imgscale = %d and uid = %d limit 1", dbesc($p['resource_id']), intval($p['imgscale']), intval($channel['channel_id']));
dbesc_array($p);
if ($exists) {
$str = '';
foreach ($p as $k => $v) {
if ($str) {
$str .= ",";
}
$str .= " `" . $k . "` = '" . $v . "' ";
}
$r = dbq("update `photo` set " . $str . " where id = " . intval($exists[0]['id']));
} else {
$r = dbq("INSERT INTO photo (`" . implode("`, `", array_keys($p)) . "`) VALUES ('" . implode("', '", array_values($p)) . "')");
}
}
}
if ($f['item']) {
sync_items($channel, $f['item'], ['channel_address' => $original_channel, 'url' => $oldbase]);
}
}
}
}
