com.tamnd.app.filters.CsrfHeaderFilter.java Source code

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Here is the source code for com.tamnd.app.filters.CsrfHeaderFilter.java

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package com.tamnd.app.filters;

import java.io.IOException;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.security.web.csrf.CsrfToken;
import org.springframework.web.filter.OncePerRequestFilter;
import org.springframework.web.util.WebUtils;

/**
 *
 * @author tamnd
 */
public class CsrfHeaderFilter extends OncePerRequestFilter {
    protected static final String REQUEST_ATTRIBUTE_NAME = "_csrf";
    protected static final String RESPONSE_HEADER_NAME = "X-CSRF-HEADER";
    protected static final String RESPONSE_PARAM_NAME = "X-CSRF-PARAM";
    protected static final String RESPONSE_TOKEN_NAME = "X-CSRF-TOKEN";

    @Override
    protected void doFilterInternal(HttpServletRequest request, HttpServletResponse response,
            FilterChain filterChain) throws ServletException, IOException {
        CsrfToken csrf = (CsrfToken) request.getAttribute(CsrfToken.class.getName());
        if (csrf != null) {
            Cookie cookie = WebUtils.getCookie(request, "XSRF-TOKEN");
            String token = csrf.getToken();
            if (cookie == null || token != null && !token.equals(cookie.getValue())) {
                cookie = new Cookie("XSRF-TOKEN", token);
                cookie.setPath("/");
                response.addCookie(cookie);
            }
        }
        filterChain.doFilter(request, response);

        //      CsrfToken token = (CsrfToken) request.getAttribute(REQUEST_ATTRIBUTE_NAME);
        //        if (token != null) {
        //            response.setHeader(RESPONSE_HEADER_NAME, token.getHeaderName());
        //            response.setHeader(RESPONSE_PARAM_NAME, token.getParameterName());
        //            response.setHeader(RESPONSE_TOKEN_NAME , token.getToken());
        //        }
        //        filterChain.doFilter(request, response);
    }
}