解决go echo后端处理跨域的两种操作方式

func setAccessOriginUrl(c echo.Context) {
    c.Response().Header().Set("Access-Control-Allow-Origin", "*")
}

func setAccessOriginUrl(c echo.Context) {
    c.Response().Header().Set("Access-Control-Allow-Origin", Conf.Admin.AccessUrl) //允许访问所有域
    c.Response().Header().Set("Access-Control-Allow-Credentials", "true")
}

w.Header().Set("Access-Control-Allow-Origin", "*") //允许访问所有域
w.Header().Add("Access-Control-Allow-Headers", "Content-Type") //header的类型
w.Header().Set("content-type", "application/json") //返回数据格式是json