/**
* Output the right headers for outputting file data to a browser.
*
* @param \GO\Base\Fs\File $file Use \GO\Base\Fs\MemoryFile for outputting variables
* @param boolean $inline
* @param boolean $cache Cache the file for one day in the browser.
* @param array $extraHeaders Key value array for extra headers
*/
public static function outputDownloadHeaders(\GO\Base\Fs\File $file, $inline = true, $cache = false, $extraHeaders = array())
{
header('Content-Transfer-Encoding: binary');
$disposition = $inline ? 'inline' : 'attachment';
if ($cache) {
header("Expires: " . date("D, j M Y G:i:s ", time() + 86400) . 'GMT');
//expires in 1 day
header('Cache-Control: cache');
header('Pragma: cache');
}
if (Http::isInternetExplorer()) {
header('Content-Type: application/download');
header('Content-Disposition: ' . $disposition . '; filename="' . rawurlencode($file->name()) . '"');
if (!$cache) {
header('Cache-Control: must-revalidate, post-check=0, pre-check=0');
header('Pragma: public');
}
} else {
header('Content-Type: ' . $file->mimeType());
header('Content-Disposition: ' . $disposition . '; filename="' . $file->name() . '"');
if (!$cache) {
header('Pragma: no-cache');
}
}
if ($file->exists()) {
if ($file->extension() != 'zip') {
//Don't set content lenght for zip files because gzip of apache will corrupt the download. http://www.heath-whyte.info/david/computers/corrupted-zip-file-downloads-with-php
header('Content-Length: ' . $file->size());
}
header("Last-Modified: " . gmdate("D, d M Y H:i:s", $file->mtime()) . " GMT");
header("ETag: " . $file->md5Hash());
}
foreach ($extraHeaders as $header => $value) {
header($header . ': ' . $value);
}
}
