public function stream()
{
// Get the 'Range' header if one was sent
if (array_key_exists('HTTP_RANGE', $_SERVER)) {
// IIS/Some Apache versions
$range = $_SERVER['HTTP_RANGE'];
} elseif (function_exists('apache_request_headers') && ($apache = apache_request_headers())) {
// Try Apache again
$headers = [];
foreach ($apache as $header => $val) {
$headers[strtolower($header)] = $val;
}
$range = array_key_exists('range', $headers) ? $headers['range'] : false;
} else {
// We can't get the header/there isn't one set
$range = false;
}
// Get the data range requested (if any)
$fileSize = filesize($this->song->path);
if ($range) {
$partial = true;
list($param, $range) = explode('=', $range);
// Bad request - range unit is not 'bytes'
abort_unless(strtolower(trim($param)) === 'bytes', 400);
$range = explode(',', $range);
$range = explode('-', $range[0]);
// We only deal with the first requested range
// Bad request - 'bytes' parameter is not valid
abort_unless(count($range) === 2, 400);
if ($range[0] === '') {
// First number missing, return last $range[1] bytes
$end = $fileSize - 1;
$start = $end - (int) $range[0];
} elseif ($range[1] === '') {
// Second number missing, return from byte $range[0] to end
$start = (int) $range[0];
$end = $fileSize - 1;
} else {
// Both numbers present, return specific range
$start = (int) $range[0];
$end = (int) $range[1];
if ($end >= $fileSize || !$start && (!$end || $end === $fileSize - 1)) {
// Invalid range/whole file specified, return whole file
$partial = false;
}
}
$length = $end - $start + 1;
} else {
// No range requested
$length = filesize($this->song->path);
$partial = false;
}
// Send standard headers
header("Content-Type: {$this->contentType}");
header("Content-Length: {$length}");
header('Content-Disposition: attachment; filename="' . basename($this->song->path) . '"');
header('Accept-Ranges: bytes');
// if requested, send extra headers and part of file...
if ($partial) {
header('HTTP/1.1 206 Partial Content');
header("Content-Range: bytes {$start}-{$end}/{$fileSize}");
// Error out if we can't read the file
abort_unless($fp = fopen($this->song->path, 'r'), 500);
if ($start) {
fseek($fp, $start);
}
while ($length) {
// Read in blocks of 8KB so we don't chew up memory on the server
$read = $length > 8192 ? 8192 : $length;
$length -= $read;
echo fread($fp, $read);
}
fclose($fp);
} else {
// ...otherwise just send the whole file
readfile($this->song->path);
}
exit;
}