Include a file before current template file

I would like to include two files before and after current template. I am using template_redirect to do this,

But when I call get_current_template() inside template_redirect it returns nothing.

is there a way to solve this ??

here is my code:

// current template file
add_filter( 'template_include', 'var_template_include', 1000 );
function var_template_include( $t ){
    $GLOBALS['current_theme_template'] = basename($t);
    return $t;
}

function get_current_template() {
    if( !isset( $GLOBALS['current_theme_template'] ) )
        return false;
    if( $echo )
        echo $GLOBALS['current_theme_template'];
    else
        return $GLOBALS['current_theme_template'];
}

// use template redirect to include file
add_action('template_redirect', 'ra_template_block');
function ra_template_block() {
        include_once THEME_DIR.'/blockstop.php';
    get_template_part(get_current_template());
    include_once THEME_DIR.'/blocks.php';
    exit;
}

Way I am doing this
I want to set page layout from a file. I need to include below tags every time in my template file:

get_header()
get_footer()
get_sidebar()
get_template_part('right')
get_template_part('left')

So if I can set them from a specific file, then I dont need to include them in every template file.