function processPasteFetch($pasteid)
{
if (preg_match('/\\A[a-f\\d]{16}\\z/', $pasteid)) {
// Is this a valid paste identifier ?
$filename = dataid2path($pasteid) . $pasteid;
if (!is_file($filename)) {
// Check that paste exists.
return array('', 'Paste does not exist!', '');
}
} else {
return array('', 'Invalid data!', '');
}
// Get the paste itself.
$paste = json_decode(file_get_contents($filename));
$messages = array($paste);
// The paste itself is the first in the list of encrypted messages.
$CIPHERDATA = json_encode($messages);
return array($CIPHERDATA, '', '');
}
function processPasteFetch($pasteid)
{
if (preg_match('/\\A[a-f\\d]{16}\\z/', $pasteid)) {
$filename = dataid2path($pasteid) . $pasteid;
if (!is_file($filename)) {
return array('', 'Paste does not exist, has expired or has been deleted.', '');
}
}
// Get the paste itself.
$paste = json_decode(file_get_contents($filename));
// See if paste has expired.
if (isset($paste->meta->expire_date) && $paste->meta->expire_date < time()) {
deletePaste($pasteid);
// Delete the paste
return array('', 'Paste does not exist, has expired or has been deleted.', '');
}
// We kindly provide the remaining time before expiration (in seconds)
if (property_exists($paste->meta, 'expire_date')) {
$paste->meta->remaining_time = $paste->meta->expire_date - time();
}
$messages = array($paste);
// The paste itself is the first in the list of encrypted messages.
// If it's a discussion, get all comments.
if (property_exists($paste->meta, 'opendiscussion') && $paste->meta->opendiscussion) {
$comments = array();
$datadir = dataid2discussionpath($pasteid);
if (!is_dir($datadir)) {
mkdir($datadir, $mode = 0705, $recursive = true);
}
$dhandle = opendir($datadir);
while (false !== ($filename = readdir($dhandle))) {
if (is_file($datadir . $filename)) {
$comment = json_decode(file_get_contents($datadir . $filename));
// Filename is in the form pasteid.commentid.parentid:
// - pasteid is the paste this reply belongs to.
// - commentid is the comment identifier itself.
// - parentid is the comment this comment replies to (It can be pasteid)
$items = explode('.', $filename);
$comment->meta->commentid = $items[1];
// Add some meta information not contained in file.
$comment->meta->parentid = $items[2];
$comments[$comment->meta->postdate] = $comment;
// Store in table
}
}
closedir($dhandle);
ksort($comments);
// Sort comments by date, oldest first.
$messages = array_merge($messages, $comments);
}
$CIPHERDATA = json_encode($messages);
// If the paste was meant to be read only once, delete it.
if (property_exists($paste->meta, 'burnafterreading') && $paste->meta->burnafterreading) {
deletePaste($pasteid);
}
return array($CIPHERDATA, '', '');
}
}
// Make sure format is correct.
if (!validSJCL($data)) {
echo json_encode(array('status' => 1, 'message' => 'Invalid data.'));
exit;
}
// Read additional meta-information.
$meta = array();
if ($error) {
echo json_encode(array('status' => 1, 'message' => 'Invalid data.'));
exit;
}
// We just want a small hash to avoid collisions: Half-MD5 (64 bits) will do the trick.
$dataid = substr(hash('md5', $data), 0, 16);
$storage = array('data' => $data);
$storagedir = dataid2path($dataid);
if (!is_dir($storagedir)) {
mkdir($storagedir, $mode = 0705, $recursive = true);
}
if (is_file($storagedir . $dataid)) {
// Oups... improbable collision.
echo json_encode(array('status' => 1, 'message' => 'Infite improbability drive activated! Try again, please.'));
exit;
}
// New paste
file_put_contents($storagedir . $dataid, json_encode($storage), LOCK_EX);
// Generate the "delete" token.
// The token is the hmac of the pasteid signed with the server salt.
// The paste can be delete by calling http://myserver.com/zerobin/?pasteid=<pasteid>&deletetoken=<deletetoken>
$deletetoken = hash_hmac('sha1', $dataid, getServerSalt());
echo json_encode(array('status' => 0, 'id' => $dataid, 'deletetoken' => $deletetoken));
function deletePaste($pasteid)
{
// Delete the paste itself
unlink(dataid2path($pasteid) . $pasteid);
// Delete discussion if it exists.
$discdir = dataid2discussionpath($pasteid);
if (is_dir($discdir)) {
// Delete all files in discussion directory
$dhandle = opendir($discdir);
while (false !== ($filename = readdir($dhandle))) {
if (is_file($discdir . $filename)) {
unlink($discdir . $filename);
}
}
closedir($dhandle);
// Delete the discussion directory.
rmdir($discdir);
}
}
