juick-api/src/main/java/com/juick/api/configuration/JuickHashFilter.java


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package com.juick.api.configuration;

import com.juick.User;
import com.juick.service.UserService;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.GrantedAuthority;
import org.springframework.security.core.authority.SimpleGrantedAuthority;
import org.springframework.security.core.context.SecurityContext;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.web.authentication.WebAuthenticationDetails;
import org.springframework.web.filter.GenericFilterBean;

import javax.inject.Inject;
import javax.servlet.FilterChain;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import java.io.IOException;
import java.util.Collections;
import java.util.List;

/**
 * Created by vitalyster on 27.11.2016.
 */
public class JuickHashFilter extends GenericFilterBean {
    @Inject
    UserService userService;

    @Override
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        String hash = request.getParameter("hash");
        if (hash != null) {
            User user = userService.getUserByHash(hash);
            if (user.getUid() > 0) {
                List<GrantedAuthority> authorities = Collections.singletonList(new SimpleGrantedAuthority("ROLE_USER"));
                UsernamePasswordAuthenticationToken token = new UsernamePasswordAuthenticationToken(user.getName(), null);
                token.setDetails(new WebAuthenticationDetails((HttpServletRequest) request));
                SecurityContextHolder.getContext().setAuthentication(new UsernamePasswordAuthenticationToken(user.getName(), null, authorities));
            }
        }
        chain.doFilter(request, response);
    }
 }