由于CORS，无法连接到Java中的Web服务

Question

I have created a filter like this and I configured it in the web.xml. I manage to retrieve data with simple GET methods, but when trying to POST a new resource it fails. I am using AngularJS and I get this in the console. I haven't fully understood what CORS is, but from what I have read it seems like there is a "pre-flight" request (OPTIONS method?). I don't know what I miss, how can I fix it? This is the error that I get:

Origin http://localhost is not allowed by Access-Control-Allow-Origin.

Code:

@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
    final HttpServletResponse httpResponse = (HttpServletResponse) response;
    httpResponse.addHeader("Access-Control-Allow-Origin", "*");
    httpResponse.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE, OPTIONS");
    httpResponse.addHeader("Access-Control-Allow-Headers", "Authorization, X-Requested-With, Content-Type");

    chain.doFilter(request, response);
}

Answer 1

You have to add some settings in you web.xml. Here is a link that should help you http://software.dzhuvinov.com/cors-filter-installation.html