<?php

// Register request uri
$requestUri = isset($_SERVER['REQUEST_URI'])
    ? $_SERVER['REQUEST_URI']
    : '/';

$fileName = $_SERVER["SCRIPT_FILENAME"];

function get_mime_type($filename)
{
    $idx = explode('.', $filename);
    $count_explode = count($idx);
    $idx = strtolower($idx[$count_explode - 1]);

    $mimet = array(
        'txt' => 'text/plain',
        'htm' => 'text/html',
        'html' => 'text/html',
        'php' => 'text/html',
        'css' => 'text/css',
        'js' => 'application/javascript',
        'json' => 'application/json',
        'xml' => 'application/xml',
        'swf' => 'application/x-shockwave-flash',
        'flv' => 'video/x-flv',

        // images
        'png' => 'image/png',
        'jpe' => 'image/jpeg',
        'jpeg' => 'image/jpeg',
        'jpg' => 'image/jpeg',
        'gif' => 'image/gif',
        'bmp' => 'image/bmp',
        'ico' => 'image/vnd.microsoft.icon',
        'tiff' => 'image/tiff',
        'tif' => 'image/tiff',
        'svg' => 'image/svg+xml',
        'svgz' => 'image/svg+xml',

        // archives
        'zip' => 'application/zip',
        'rar' => 'application/x-rar-compressed',
        'exe' => 'application/x-msdownload',
        'msi' => 'application/x-msdownload',
        'cab' => 'application/vnd.ms-cab-compressed',

        // audio/video
        'mp3' => 'audio/mpeg',
        'qt' => 'video/quicktime',
        'mov' => 'video/quicktime',

        // adobe
        'pdf' => 'application/pdf',
        'psd' => 'image/vnd.adobe.photoshop',
        'ai' => 'application/postscript',
        'eps' => 'application/postscript',
        'ps' => 'application/postscript',

        // ms office
        'doc' => 'application/msword',
        'rtf' => 'application/rtf',
        'xls' => 'application/vnd.ms-excel',
        'ppt' => 'application/vnd.ms-powerpoint',
        'docx' => 'application/msword',
        'xlsx' => 'application/vnd.ms-excel',
        'pptx' => 'application/vnd.ms-powerpoint',


        // open office
        'odt' => 'application/vnd.oasis.opendocument.text',
        'ods' => 'application/vnd.oasis.opendocument.spreadsheet',
    );

    if (isset($mimet[$idx])) {
        return $mimet[$idx];
    } else {
        return 'application/octet-stream';
    }
}

// Handle app resources with caching
if (preg_match('/\.(?:png|jpg|jpeg|gif|xml|json|css|eot|svg|otf|ttf|woff|woff2|scss|less|txt|ico|webp)$/', $requestUri)) {
    // Generate file name

    // Parse file data
    $lastModified = filemtime($fileName);
    $etagFile = md5_file($fileName);
    $ifModifiedSince = (isset($_SERVER['HTTP_IF_MODIFIED_SINCE']) ? $_SERVER['HTTP_IF_MODIFIED_SINCE'] : false);
    $etagHeader = (isset($_SERVER['HTTP_IF_NONE_MATCH']) ? trim($_SERVER['HTTP_IF_NONE_MATCH']) : false);

    // Set caching header
    header('Last-Modified: ' . gmdate('D, d M Y H:i:s', $lastModified) . ' GMT');
    header('Etag: ' . $etagFile);
    header('Cache-Control: public,max-age=31536000');

    // Check if the requested resource has changed
    if (@strtotime($_SERVER['HTTP_IF_MODIFIED_SINCE']) == $lastModified || $etagHeader == $etagFile) {
        // File has not changed
        header('HTTP/1.1 304 Not Modified');
        exit;
    } else {

        // Parse requested resource's mime type

        // Serve requested resource
        header('Content-Type: ' . get_mime_type($fileName));
        header('Content-Length: ' . filesize($fileName));
        readfile($fileName);
        $finfo = null;
        exit;
    }
}

// Parse requested page & action
return FALSE;