平常测试的时候 需要构建假数据，但是用到图片的时候如果是自己上传的图片，还要去七牛或者后台找比较麻烦。
如果是百度的东西，一般都是一长串地址，很多时候还有访问不到，资源链接太长了，服务器接口出现问题。
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