1.打开微信。

2.绑定设备

3.随便找到图片格式文件，长按，打开到设备

4.下面是回调接口获取到的图片数据，获取不到name,type,size、且文件下载后也无法打开。

{
    "device_id": "dev1", 
    "device_type": "--", 
    "msg_id": 902148877, 
    "msg_type": "set", 
    "services": {
        "wxmsg_file": {
            "type": "", 
            "name": "", 
            "size": 0, 
            "md5": "", 
            "download_url": "http://wxapp.tc.qq.com/202/20303/stodownload?filekey=30350201010421301f020200ca0402484b0410431d55cb9d479537cc812b5a89ed84c1020300e072040d00000004627466730000000131&hy=HK&storeid=32303231303630333134333432393030303636353239303339383338663937633038316130393030303030306361&bizid=1023"
        }, 
        "wxmsg_image": {
            "type": "", 
            "name": "", 
            "size": 0, 
            "md5": "", 
            "download_url": "http://wxapp.tc.qq.com/202/20303/stodownload?filekey=30350201010421301f020200ca0402484b0410431d55cb9d479537cc812b5a89ed84c1020300e072040d00000004627466730000000131&hy=HK&storeid=32303231303630333134333432393030303636353239303339383338663937633038316130393030303030306361&bizid=1023", 
            "enckey": "1434534542080782033"
        }
    }, 
    "user": "--"
}