（9）返回xml格式数据，但是用户却收到“该公众号提供的服务出现故障，请稍后再试”

1 后台返回的xml格式

<xml>
<ToUserName>oHNZ-w5CL6LPMNWP3x5qUX92mZDo</ToUserName>
<FromUserName>gh_60ef45a38569</FromUserName>
<CreateTime>1504602632952</CreateTime>
<MsgType>image</MsgType>
<Image>
<MediaId>p483hrUP4Zf19H7XRWLKaT-Vt3FTArsj7dQPrWAy_lLbEgGc6DTrLvQT3_iqJ8j3</MediaId>
</Image>
</xml>

<xml>
<ToUserName>oHNZ-w5CL6LPMNWP3x5qUX92mZDo</ToUserName>
<FromUserName>gh_60ef45a38569</FromUserName>
<CreateTime>1504602839380</CreateTime>
<MsgType>music</MsgType>
<music>
<Title>Wake</Title>
<Description>演唱者为hillsong young and free乐队,歌曲隶属于专辑《We Are Young and Free》</Description>
<MusicUrl>http://2wh8ui.natappfree.cc/WinXin/wxSource/Wake.mp3</MusicUrl>
<HQMusicUrl>http://2wh8ui.natappfree.cc/WinXin/wxSource/Wake.mp3</HQMusicUrl>
<ThumbMediaId>UNExwdFfkDrFHLkE9zNuH7I50nxUZa9PzpVyxXgM4HkiUYV3PHfiAoxdEIyPBeQJ</ThumbMediaId>
</music>
</xml>

2 微信客户端发消息得不到结果

3 原因

代码修改