关于CORS跨域问题?

Question

过滤器中已经设置了        httpServletResponse.setHeader("Access-Control-Allow-Origin", httpServletRequest.getHeader("Origin"));        httpServletResponse.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE, OPTIONS");        httpServletResponse.setHeader("Access-Control-Max-Age", "0");        httpServletResponse.setHeader("Access-Control-Allow-Headers", "Origin, No-Cache, X-Requested-With, If-Modified-Since, Pragma, Last-Modified, Cache-Control, Expires, Content-Type, X-E4M-With,userId,token, Access-Control-Allow-Origin");        httpServletResponse.setHeader("Access-Control-Allow-Credentials", "true");        httpServletResponse.setHeader("XDomainRequestAllowed", "1");前端请求也加上了参数            xhrFields: {                withCredentials: true            },            crossDomain: true,返回结果也是200, 但是chrome报错了错误The 'Access-Control-Allow-Origin' header has a value 'null' that is not equal to the supplied origin. Origin 'null' is therefore not allowed access.

Answer 1

这个不是你单方面设置就有用的，还需要后端的小伙伴帮忙确认一下他们的设置。

Answer 2

本地localhost的origin是null,你可以设置为*或特定的域名试试