CORS預檢響應未成功，已攔截跨源請求：同源政策禁止讀取位于

已攔截跨源請求：同源政策禁止讀取位于 http://47.55.32.128:8081/abj_api/Login/GetRoleFunctions?roleId=800 的遠端資源。（原因：CORS 請求未能成功）。

背景接口提供方需要做如下修改：

Global.asax配置，添加如下方法

protected void Application_BeginRequest(object sender, EventArgs e)
        {
            System.Web.HttpApplication app = sender as System.Web.HttpApplication;
            HttpResponse response = app.Response;
            //支援跨域        
            if (app.Request.HttpMethod == "OPTIONS")
            {
                //支援跨域
                response.AddHeader("Access-Control-Allow-Methods", "*");
                response.AddHeader("Access-Control-Allow-Headers", "*");
                response.AddHeader("Access-Control-Allow-Origin", "*");
                response.AddHeader("Cache-Control", "no-cache");  
                response.StatusCode = 200;
                response.End();
            }
            else
            {
                response.AddHeader("Access-Control-Allow-Origin", "*");
                response.AddHeader("Access-Control-Allow-Headers", "*");
                response.AddHeader("Access-Control-Allow-Methods", "*");
                response.AddHeader("Cache-Control", "no-cache");
                //response.AddHeader("Access-Control-Allow-Methods", "GET, POST,PUT, DELETE");
                //response.AddHeader("Access-Control-Allow-Headers", "Content-Type");
            }
        }