带cookie的跨域2

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1、Access-Control-Allow-Origin:具体URL

（1）Access-Control-Allow-Origin设置具体的URL，只能解决设置的具体URL跨域问题，不解决带Cookie的所有URL跨域请求

设置具体跨域URL

CrossFilter代码：

@Override

    public void doFilter(ServletRequestservletRequest, ServletResponse servletResponse, FilterChain filterChain)throws IOException, ServletException {

        HttpServletResponse res =(HttpServletResponse) servletResponse;

        HttpServletRequest req =(HttpServletRequest) servletRequest;

        String origin =req.getHeader("Origin");

        //带cookie请求，origin必须全匹配

//       res.addHeader("Access-Control-Allow-Origin",origin);

       res.addHeader("Access-Control-Allow-Origin","http://localhost:8082");

//       res.addHeader("Access-Control-Allow-Methods","GET");

        // *号表示支持所有的域名（除了带cookie请求外）

//       res.addHeader("Access-Control-Allow-Origin","*");

        // *号表示支持所有的请求方法

       res.addHeader("Access-Control-Allow-Methods","*");

       res.addHeader("Access-Control-Allow-Headers","Content-Type");

        //设置OPTIONS预检命令缓存

       res.addHeader("Access-Control-Max-Age", "60000");

        //允许带cookie请求跨域

        res.addHeader("Access-Control-Allow-Credentials","true");

        filterChain.doFilter(servletRequest,servletResponse);

    }

（2）只有http://localhost:8082访问才能跨域，如果是http://127.0.0.1:8082访问，就不满足跨域

http://localhost:8082访问能跨域 http://127.0.0.1:8082访问不能跨域

2、修改后台代码，获取请求Header中Origin

设置所有URL都能跨域

CrossFilter代码：

   @Override

   public void doFilter(ServletRequest servletRequest, ServletResponseservletResponse, FilterChain filterChain) throws IOException, ServletException{

       HttpServletResponse res = (HttpServletResponse) servletResponse;

       HttpServletRequest req = (HttpServletRequest) servletRequest;

       Stringorigin = req.getHeader("Origin");

       //带cookie请求，origin必须全匹配

       res.addHeader("Access-Control-Allow-Origin",origin);

//       res.addHeader("Access-Control-Allow-Origin","http://localhost:8082");

//       res.addHeader("Access-Control-Allow-Methods","GET");

       // *号表示支持所有的域名（除了带cookie请求外）

//       res.addHeader("Access-Control-Allow-Origin","*");

       // *号表示支持所有的请求方法

       res.addHeader("Access-Control-Allow-Methods","*");

        res.addHeader("Access-Control-Allow-Headers","Content-Type");

       //设置OPTIONS预检命令缓存

       res.addHeader("Access-Control-Max-Age", "60000");

       //允许带cookie请求跨域

       res.addHeader("Access-Control-Allow-Credentials","true");

       filterChain.doFilter(servletRequest, servletResponse);

}

http://localhost:8082访问能跨域，http://127.0.0.1:8082访问也能跨域

http://localhost:8082访问能跨域 http://127.0.0.1:8082访问能跨域