com.olegchir.flussonic_userlinks.auth.AuthSuccessHandler.java Source code

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Here is the source code for com.olegchir.flussonic_userlinks.auth.AuthSuccessHandler.java

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package com.olegchir.flussonic_userlinks.auth;
/**
 * Copyright (C) 2014 Oleg Chirukhin
 * Licensed under the Apache License 2.0,
 * see LICENSE-2.0.txt, LICENSE (it's a copy of LICENSE-2.0.txt) and NOTICE for additional information.
 */

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.security.core.Authentication;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.web.DefaultRedirectStrategy;
import org.springframework.security.web.RedirectStrategy;
import org.springframework.security.web.WebAttributes;
import org.springframework.security.web.authentication.AuthenticationSuccessHandler;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.Collection;

/**
 * Created by olegchir on 27.12.14.
 * http://www.baeldung.com/spring_redirect_after_login
 */
public class AuthSuccessHandler implements AuthenticationSuccessHandler {
    protected Log logger = LogFactory.getLog(this.getClass());

    private RedirectStrategy redirectStrategy = new DefaultRedirectStrategy();

    @Override
    public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response,
            Authentication authentication) throws IOException {
        handle(request, response, authentication);
        clearAuthenticationAttributes(request);
    }

    protected void handle(HttpServletRequest request, HttpServletResponse response, Authentication authentication)
            throws IOException {
        String targetUrl = determineTargetUrl(authentication);

        if (response.isCommitted()) {
            logger.debug("Response has already been committed. Unable to redirect to " + targetUrl);
            return;
        }

        redirectStrategy.sendRedirect(request, response, targetUrl);
    }

    /** Builds the target URL according to the logic defined in the main class Javadoc. */
    protected String determineTargetUrl(Authentication authentication) {
        boolean isUser = false;
        boolean isAdmin = false;
        Collection<? extends GrantedAuthority> authorities = authentication.getAuthorities();
        for (GrantedAuthority grantedAuthority : authorities) {
            if (grantedAuthority.getAuthority().equals("ROLE_USER")) {
                isUser = true;
                break;
            } else if (grantedAuthority.getAuthority().equals("ROLE_ADMIN")) {
                isAdmin = true;
                break;
            }
        }

        if (isUser) {
            return "/dashboard";
        } else if (isAdmin) {
            return "/admin_dashboard";
        } else {
            throw new IllegalStateException();
        }
    }

    protected void clearAuthenticationAttributes(HttpServletRequest request) {
        HttpSession session = request.getSession(false);
        if (session == null) {
            return;
        }
        session.removeAttribute(WebAttributes.AUTHENTICATION_EXCEPTION);
    }

    public void setRedirectStrategy(RedirectStrategy redirectStrategy) {
        this.redirectStrategy = redirectStrategy;
    }

    protected RedirectStrategy getRedirectStrategy() {
        return redirectStrategy;
    }
}