Received an invalid response. Origin 'null' is therefore not allowed access.
今天在做二级联动，使用ajax请求xml数据，在用ie8与chrome做测试时就出现了这句话，看到网上也有说跨域等其他，更改浏览器等......
我的解决方法：我把它放在iis服务器进行测试，请求数据就正常了！
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Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'http://localhost:8000' is therefore not allowed a
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