跨域405(Method Not Allowed)問題

zepot post沒有問題，用plupload上傳出現了這個錯誤，options過不去。顯示Response for preflight has invalid http status code 405

在global中處理下option

  protected void Application_BeginRequest()
        {
            if (Request.Headers.AllKeys.Contains("Origin") && Request.HttpMethod == "OPTIONS")
            {
                Response.End();
            }
        }

另外，還要注意header的設定。多個允許的自定義header逗號隔開。不然也會被拒絕。

 <httpProtocol>
      <customHeaders>
        <add name="Access-Control-Allow-Origin" value="*" />
        <add name="Access-Control-Allow-Headers" value="Content-Type,Token" />
        <add name="Access-Control-Allow-Methods" value="GET, POST, PUT, DELETE, OPTIONS" />
      </customHeaders>
    </httpProtocol>