Stream ftp file to browser - php

Question

I am trying to retrieve and stream a file to the browser from an ftp site.
The error is:
Warning: ftp_nb_get() expects parameter 2 to be string, resource given
I know that it is a resource but how do I get around this?
if(isset($_GET['filename'])){
$requestfilename = $_GET['filename'];
if($sockets = stream_socket_pair(STREAM_PF_UNIX, STREAM_SOCK_STREAM, STREAM_IPPROTO_IP)){
stream_set_write_buffer($sockets[0], 0);
stream_set_timeout($sockets[1], 0);
if($ftp_connection = ftp_connect($ftp_server)){
if (#ftp_login($ftp_connection, $ftp_user, $ftp_pass)) {
if(#ftp_chdir($ftp_connection, $ftp_dir_new)){
if($ret = ftp_nb_get($ftp_connection, $sockets[0], $requestfilename, FTP_BINARY)){
while(ftp_nb_continue($ftp_connection)==FTP_MOREDATA){
$contents = stream_get_contents($sockets[1]);
if($contents !== false) {
echo $contents;
flush();
}
}
if ($ret != FTP_FINISHED) $error[] = 'There was an error downloading the file...';
}else{
$error[] = "Could not ftp_nb_get file from $ftp_server";
}
}else{
$error[] = "Couldn't cd to $ftp_dir_new";
}
} else {
$error[] = "Couldn't connect as $ftp_user";
}
}else{
$error[] = "Couldn't connect to $ftp_server";
}
}else{
$error[] = "Unable to create socket pair";
}
if($sockets){
fclose($sockets[0]);
fclose($sockets[1]);
}
if( ! empty($ftp_connection)) ftp_close($ftp_connection);
}

Answer 1

So you're looking for an alternative to ftp_nb_get() that allows you to write to STDOUT or an arbitrary stream, instead of a local file?
I've not used this module at all, but it looks like ftp_nb_fget does what you want.

Answer 2

I know it's an old topic, but I came across this code and found small bug. Maybe someone uses it and has problem making it work.
This code won't work for very small files because ftp_nb_continue won't return FTP_MOREDATA even once. To fix this you need to change while loop to:
while($ret == FTP_MOREDATA){
$contents = stream_get_contents($sockets[1]);
if($contents !== false) {
echo $contents;
flush();
}
$ret = ftp_nb_continue($ftp_connection);
}