req_info实际超过1024，如果按照官方文档验证数据，做数据长度验证时，会出现异常。

<xml>

    <return_code>SUCCESS</return_code>

    <appid>

        <![CDATA[]]>

    </appid>

    <mch_id>

        <![CDATA[]]>

    </mch_id>

    <nonce_str>

        <![CDATA[5df0ba7efab50c5a0f0e16a570e4a5ee]]>

    </nonce_str>

    <req_info>

        <![CDATA[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]]>

    </req_info>

</xml>