package org.mypackage;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
/**
* A simple CORS filter
*
*/
@WebFilter(asyncSupported = true, urlPatterns = {"/*"})
public class CORSFilter implements Filter {
/**
* A basic CORS filter, allowing everything
*/
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
response.addHeader("Access-Control-Allow-Origin", "*");
response.addHeader("Access-Control-Allow-Methods","GET, OPTIONS, HEAD, PUT, POST, DELETE");
response.addHeader("Access-Control-Allow-Headers","*");
if (request.getMethod().equals("OPTIONS")) {
// special case of return code for "OPTIONS" query
response.setStatus(HttpServletResponse.SC_ACCEPTED);
return;
}
// pass the request along the filter chain
chain.doFilter(request, servletResponse);
}
}