phprs\Request::__construct PHP Method

    function __construct($data = null, $url_begin = 0)
    {
        if ($data === null) {
            $data = $GLOBALS;
            $data['header'] = $this->getAllHeaders();
        }
        $this->url_begin = $url_begin;
        //支持json请求(Content-Type: application/json)
        $contentType = null;
        if (isset($data['header']['Content-Type'])) {
            $contentType = $data['header']['Content-Type'];
            list($contentType, ) = explode(';', $contentType) + array(null, null);
            if ($contentType == 'application/json') {
                $post = file_get_contents('php://input');
                if ($post != '') {
                    $post = json_decode($post, true);
                    Verify::isTrue(is_array($post), new BadRequest('post unjson data with application/json type'));
                    $data['_POST'] = $post;
                    if (!isset($data['_REQUEST'])) {
                        $data['_REQUEST'] = [];
                    }
                    $data['_REQUEST'] = array_merge($data['_POST'], $data['_REQUEST']);
                }
            } elseif ($contentType == 'text/plain') {
                $data['_POST'] = file_get_contents('php://input');
            }
        }
        //TODO: 支持put请求
        if (isset($data['_SERVER']['REQUEST_METHOD']) && 'PUT' == $data['_SERVER']['REQUEST_METHOD']) {
            if ($contentType == 'application/x-www-form-urlencoded') {
                $queryString = file_get_contents('php://input');
                $query = array();
                parse_str($queryString, $query);
                $data['_POST'] = $query;
            }
        }
        $full_path = $data['_SERVER']['REQUEST_URI'];
        Verify::isTrue($full_path, '$._SERVER.REQUEST_URI not found');
        list($full_path, ) = explode('?', $full_path);
        $paths = explode('/', $full_path);
        $paths = array_filter($paths, function ($i) {
            return $i !== '';
        });
        $paths = array_slice($paths, $this->url_begin);
        $data['path'] = $paths;
        $this->data = new JsonStore($data);
    }