get app data ( include name and app_data )

def get_app_data(app_id):
    """
    get app data ( include name and app_data )
    """
    try:
        conn = get_conn()
        c = conn.cursor()
        c.execute("SELECT id,name,app_data FROM app WHERE id='{0}' ".format(app_id))
        result = c.fetchone()
        conn.close()

        if result:
            appname = result[1]
            app_data = utils.str2dict( base64.b64decode(result[2]) )

            return (appname,app_data)
        else:
            return (None,None)

    except Exception,e:
        raise RuntimeError('get app data failed! %s' % e)