Handling Http Range header in Laravel

response.php

<?php
// https://laravel.io/forum/09-23-2014-how-to-support-http-byte-serving-in-file-streams
// Provide a streaming file with support for scrubbing
	private function streamFile( $contentType, $path ) {
		$fullsize = filesize($path);
		$size = $fullsize;
		$stream = fopen($path, "r");
		$response_code = 200;
		$headers = array("Content-type" => $contentType);
		
		// Check for request for part of the stream
		$range = Request::header('Range');
		if($range != null) {
			$eqPos = strpos($range, "=");
			$toPos = strpos($range, "-");
			$unit = substr($range, 0, $eqPos);
			$start = intval(substr($range, $eqPos+1, $toPos));
			$success = fseek($stream, $start);
			if($success == 0) {
				$size = $fullsize - $start;
				$response_code = 206;
				$headers["Accept-Ranges"] = $unit;
				$headers["Content-Range"] = $unit . " " . $start . "-" . ($fullsize-1) . "/" . $fullsize;
			}
		}
		
		$headers["Content-Length"] = $size;

		return Response::stream(function () use ($stream) {
			fpassthru($stream);
		}, $response_code, $headers);
	}