Transfers a file to the client using HTTP.
Pipes a file through Drupal to the client.
$uri: String specifying the file URI to transfer.
$headers: An array of HTTP headers to send along with file.
function file_transfer($uri, $headers) {
if (ob_get_level()) {
ob_end_clean();
}
foreach ($headers as $name => $value) {
drupal_add_http_header($name, $value);
}
drupal_send_headers();
$scheme = file_uri_scheme($uri);
// Transfer file in 1024 byte chunks to save memory usage.
if ($scheme && file_stream_wrapper_valid_scheme($scheme) && ($fd = fopen($uri, 'rb'))) {
while (!feof($fd)) {
print fread($fd, 1024);
}
fclose($fd);
}
else {
drupal_not_found();
}
drupal_exit();
}