LoginSocialController

package com.example.loginbysocial.controller;

import java.io.IOException;
import javax.servlet.http.HttpServletRequest;
import com.example.loginbysocial.common.GoogleUtils;
import com.example.loginbysocial.entity.GooglePojo;
import org.apache.http.client.ClientProtocolException;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.security.authentication.UsernamePasswordAuthenticationToken;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.WebAuthenticationDetailsSource;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class LoginSocialController {
    @Autowired
    private GoogleUtils googleUtils;
    @RequestMapping(value = { "/", "/login" })
    public String login() {
        return "login";
    }
    @GetMapping(value = {"/login-google"})
    public String loginGoogle(HttpServletRequest request) throws ClientProtocolException, IOException {
        String code = request.getParameter("code");
        if (code == null || code.isEmpty()) {
            return "redirect:/login?google=error";
        }
        String accessToken = googleUtils.getToken(code);
        GooglePojo googlePojo = googleUtils.getUserInfo(accessToken);
        UserDetails userDetail = googleUtils.generateUser(googlePojo);
        UsernamePasswordAuthenticationToken authentication = new UsernamePasswordAuthenticationToken(userDetail, null,
                userDetail.getAuthorities());
        authentication.setDetails(new WebAuthenticationDetailsSource().buildDetails(request));
        SecurityContextHolder.getContext().setAuthentication(authentication);
        return "Login by Google:"+googlePojo.getGiven_name()+" "+googlePojo.getFamily_name();
    }
}