搭建的Webservice接口，用另一个服务器访问时候报这个错误：
xxx has been blocked from loading by Cross-Origin Resource Sharing policy: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://xxx' is therefore not allowed access.
解决办法：
打开IIS，找到出错的网站，进入“HTTP响应标头”
IIS功能视图（部分）
添加一个标头
标头添加按钮
标头为Access-Contro-Allow-Origin:*
标头示例
保存后该网站就可以访问了。
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