public function testGetMimeByExtension()
{
$this->assertEquals('application/octet-stream', Utils::getMimeByExtension(''));
$this->assertEquals('text/html', Utils::getMimeByExtension('html'));
$this->assertEquals('application/json', Utils::getMimeByExtension('json'));
$this->assertEquals('application/atom+xml', Utils::getMimeByExtension('atom'));
$this->assertEquals('application/rss+xml', Utils::getMimeByExtension('rss'));
$this->assertEquals('image/jpeg', Utils::getMimeByExtension('jpg'));
$this->assertEquals('image/png', Utils::getMimeByExtension('png'));
$this->assertEquals('text/plain', Utils::getMimeByExtension('txt'));
$this->assertEquals('application/msword', Utils::getMimeByExtension('doc'));
$this->assertEquals('application/octet-stream', Utils::getMimeByExtension('foo'));
$this->assertEquals('foo/bar', Utils::getMimeByExtension('foo', 'foo/bar'));
$this->assertEquals('text/html', Utils::getMimeByExtension('foo', 'text/html'));
}
/**
* Provides the ability to download a file to the browser
*
* @param string $file the full path to the file to be downloaded
* @param bool $force_download as opposed to letting browser choose if to download or render
* @param int $sec Throttling, try 0.1 for some speed throttling of downloads
* @param int $bytes Size of chunks to send in bytes. Default is 1024
* @throws \Exception
*/
public static function download($file, $force_download = true, $sec = 0, $bytes = 1024)
{
if (file_exists($file)) {
// fire download event
Grav::instance()->fireEvent('onBeforeDownload', new Event(['file' => $file]));
$file_parts = pathinfo($file);
$mimetype = Utils::getMimeByExtension($file_parts['extension']);
$size = filesize($file);
// File size
// clean all buffers
while (ob_get_level()) {
ob_end_clean();
}
// required for IE, otherwise Content-Disposition may be ignored
if (ini_get('zlib.output_compression')) {
ini_set('zlib.output_compression', 'Off');
}
header("Content-Type: " . $mimetype);
header('Accept-Ranges: bytes');
if ($force_download) {
// output the regular HTTP headers
header('Content-Disposition: attachment; filename="' . $file_parts['basename'] . '"');
}
// multipart-download and download resuming support
if (isset($_SERVER['HTTP_RANGE'])) {
list($a, $range) = explode("=", $_SERVER['HTTP_RANGE'], 2);
list($range) = explode(",", $range, 2);
list($range, $range_end) = explode("-", $range);
$range = intval($range);
if (!$range_end) {
$range_end = $size - 1;
} else {
$range_end = intval($range_end);
}
$new_length = $range_end - $range + 1;
header("HTTP/1.1 206 Partial Content");
header("Content-Length: {$new_length}");
header("Content-Range: bytes {$range}-{$range_end}/{$size}");
} else {
$new_length = $size;
header("Content-Length: " . $size);
if (Grav::instance()['config']->get('system.cache.enabled')) {
$expires = Grav::instance()['config']->get('system.pages.expires');
if ($expires > 0) {
$expires_date = gmdate('D, d M Y H:i:s T', time() + $expires);
header('Cache-Control: max-age=' . $expires);
header('Expires: ' . $expires_date);
header('Pragma: cache');
}
header('Last-Modified: ' . gmdate("D, d M Y H:i:s T", filemtime($file)));
// Return 304 Not Modified if the file is already cached in the browser
if (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) && strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) >= filemtime($file)) {
header('HTTP/1.1 304 Not Modified');
exit;
}
}
}
/* output the file itself */
$chunksize = $bytes * 8;
//you may want to change this
$bytes_send = 0;
$fp = @fopen($file, 'r');
if ($fp) {
if (isset($_SERVER['HTTP_RANGE'])) {
fseek($fp, $range);
}
while (!feof($fp) && !connection_aborted() && $bytes_send < $new_length) {
$buffer = fread($fp, $chunksize);
echo $buffer;
//echo($buffer); // is also possible
flush();
usleep($sec * 1000000);
$bytes_send += strlen($buffer);
}
fclose($fp);
} else {
throw new \Exception('Error - can not open file.');
}
exit;
}
}
/**
* Set response header.
*/
public function header()
{
/** @var Page $page */
$page = $this['page'];
$format = $page->templateFormat();
header('Content-type: ' . Utils::getMimeByExtension($format, 'text/html'));
// Calculate Expires Headers if set to > 0
$expires = $page->expires();
if ($expires > 0) {
$expires_date = gmdate('D, d M Y H:i:s', time() + $expires) . ' GMT';
header('Cache-Control: max-age=' . $expires);
header('Expires: ' . $expires_date);
}
// Set the last modified time
if ($page->lastModified()) {
$last_modified_date = gmdate('D, d M Y H:i:s', $page->modified()) . ' GMT';
header('Last-Modified: ' . $last_modified_date);
}
// Calculate a Hash based on the raw file
if ($page->eTag()) {
header('ETag: ' . md5($page->raw() . $page->modified()));
}
// Set debugger data in headers
if (!($format === null || $format == 'html')) {
$this['debugger']->enabled(false);
}
// Set HTTP response code
if (isset($this['page']->header()->http_response_code)) {
http_response_code($this['page']->header()->http_response_code);
}
// Vary: Accept-Encoding
if ($this['config']->get('system.pages.vary_accept_encoding', false)) {
header('Vary: Accept-Encoding');
}
}
