错误提示: Get https://res.ddkt365.com/ddktRes/imageRes/wx_headimg/0f1d9e55913c22bcaf7cca9b38048d29.jpeg: x509: certificate signed by unknown authority -> http.Getpanic: runtime error: invalid memory address or nil pointer dereference 是 CA 证书的问题,解决方案就是 拷贝