Show a resource.

def resource(resource_id):
    """Show a resource."""
    resource_obj = app.db.resource(resource_id)

    if 'raw' in request.args:
        return send_from_directory(os.path.dirname(resource_obj.path),
                                   os.path.basename(resource_obj.path))

    return render_template('resource.html', resource=resource_obj)