org.openprovenance.prov.service.core.rest.CORSFilter Maven / Gradle / Ivy
package org.openprovenance.prov.service.core.rest;
import java.io.IOException;
import jakarta.servlet.Filter;
import jakarta.servlet.FilterChain;
import jakarta.servlet.FilterConfig;
import jakarta.servlet.ServletException;
import jakarta.servlet.ServletRequest;
import jakarta.servlet.ServletResponse;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
/**
* Servlet Filter implementation class CORSFilter
*/
// Enable it for Servlet 3.x implementations
/* @ WebFilter(asyncSupported = true, urlPatterns = { "/*" }) */
public class CORSFilter implements Filter {
/**
* Default constructor.
*/
public CORSFilter() {
// TODO Auto-generated constructor stub
}
/**
* @see Filter#destroy()
*/
public void destroy() {
// TODO Auto-generated method stub
}
/**
* @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)
*/
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain chain)
throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
System.out.println("CORSFilter HTTP Request: " + request.getMethod());
// Authorize (allow) all domains to consume the content
((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Origin", "*");
((HttpServletResponse) servletResponse).addHeader("Access-Control-Allow-Methods","GET, OPTIONS, HEAD, PUT, POST");
HttpServletResponse resp = (HttpServletResponse) servletResponse;
// For HTTP OPTIONS verb/method reply with ACCEPTED status code -- per CORS handshake
if (request.getMethod().equals("OPTIONS")) {
resp.setStatus(HttpServletResponse.SC_ACCEPTED);
return;
}
// pass the request along the filter chain
chain.doFilter(request, servletResponse);
}
/**
* @see Filter#init(FilterConfig)
*/
public void init(FilterConfig fConfig) throws ServletException {
// TODO Auto-generated method stub
}
}