微信app支付回调通知参数：
<xml><appid><![CDATA[wx9703cd*******]]></appid><attach><![CDATA[{"uid":155,"ulang":"zh_CN","uname":"18761*****","urole":"1"}]]></attach><bank_type><![CDATA[CFT]]></bank_type><cash_fee><![CDATA[1]]></cash_fee><fee_type><![CDATA[CNY]]></fee_type><is_subscribe><![CDATA[N]]></is_subscribe><mch_id><![CDATA[1436891402]]></mch_id><nonce_str><![CDATA[W8ehwte3AE6B9udG]]></nonce_str><openid><![CDATA[o7UYjv1-uwCviqKiZf4414E43RAE]]></openid><out_trade_no><![CDATA[RjXIEzHOzIW2pEXiHQehSdPqiUNj]]></out_trade_no><result_code><![CDATA[SUCCESS]]></result_code><return_code><![CDATA[SUCCESS]]></return_code><sign><![CDATA[E00FAA2FD2E838BF30DECAF008DCAF4E]]></sign><time_end><![CDATA[20170209115204]]></time_end><total_fee>1</total_fee><trade_type><![CDATA[APP]]></trade_type><transaction_id><![CDATA[400209200120170209*******]]></transaction_id></xml><xml><appid><
