Merge pull request #9476 from cicioflaviu/master
BAEL-4018 Spring Security - Already logged in user redirect from the login page
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rpvilao
GitHub
commit
d88b074601
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package com.baeldung.loginredirect;
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import org.apache.http.HttpStatus;
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import org.springframework.security.authentication.AnonymousAuthenticationToken;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.core.context.SecurityContextHolder;
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import org.springframework.web.filter.GenericFilterBean;
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import javax.servlet.FilterChain;
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import javax.servlet.ServletException;
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import javax.servlet.ServletRequest;
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import javax.servlet.ServletResponse;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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import java.io.IOException;
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class LoginPageFilter extends GenericFilterBean {
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@Override
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public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
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HttpServletRequest servletRequest = (HttpServletRequest) request;
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HttpServletResponse servletResponse = (HttpServletResponse) response;
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if (isAuthenticated() && "/loginUser".equals(servletRequest.getRequestURI())) {
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String encodedRedirectURL = ((HttpServletResponse) response).encodeRedirectURL(
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servletRequest.getContextPath() + "/userMainPage");
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servletResponse.setStatus(HttpStatus.SC_TEMPORARY_REDIRECT);
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servletResponse.setHeader("Location", encodedRedirectURL);
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}
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chain.doFilter(servletRequest, servletResponse);
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}
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private boolean isAuthenticated() {
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Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
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if (authentication == null || AnonymousAuthenticationToken.class.isAssignableFrom(authentication.getClass())) {
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return false;
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}
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return authentication.isAuthenticated();
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}
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}
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package com.baeldung.loginredirect;
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import org.apache.http.HttpStatus;
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import org.springframework.security.authentication.AnonymousAuthenticationToken;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.core.context.SecurityContextHolder;
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import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
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import org.springframework.web.util.UrlPathHelper;
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import javax.servlet.http.HttpServletRequest;
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import javax.servlet.http.HttpServletResponse;
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class LoginPageInterceptor extends HandlerInterceptorAdapter {
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@Override
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public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
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UrlPathHelper urlPathHelper = new UrlPathHelper();
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if ("/loginUser".equals(urlPathHelper.getLookupPathForRequest(request)) && isAuthenticated()) {
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String encodedRedirectURL = response.encodeRedirectURL(
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request.getContextPath() + "/userMainPage");
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response.setStatus(HttpStatus.SC_TEMPORARY_REDIRECT);
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response.setHeader("Location", encodedRedirectURL);
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return false;
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} else {
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return true;
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}
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}
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private boolean isAuthenticated() {
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Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
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if (authentication == null || AnonymousAuthenticationToken.class.isAssignableFrom(authentication.getClass())) {
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return false;
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}
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return authentication.isAuthenticated();
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}
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}
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package com.baeldung.loginredirect;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import org.springframework.context.annotation.ImportResource;
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@SpringBootApplication
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@ImportResource({"classpath*:spring-security-login-redirect.xml"})
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class LoginRedirectApplication {
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public static void main(String[] args) {
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SpringApplication.run(LoginRedirectApplication.class, args);
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}
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}
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package com.baeldung.loginredirect;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
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import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
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@Configuration
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class LoginRedirectMvcConfig implements WebMvcConfigurer {
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@Override
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public void addInterceptors(InterceptorRegistry registry) {
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registry.addInterceptor(new LoginPageInterceptor());
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}
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}
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package com.baeldung.loginredirect;
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import org.springframework.context.annotation.Bean;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
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import org.springframework.security.config.annotation.web.builders.HttpSecurity;
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import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
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import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
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import org.springframework.security.crypto.bcrypt.BCryptPasswordEncoder;
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import org.springframework.security.crypto.password.PasswordEncoder;
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import org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter;
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@Configuration
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@EnableWebSecurity
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class LoginRedirectSecurityConfig extends WebSecurityConfigurerAdapter {
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@Override
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protected void configure(AuthenticationManagerBuilder auth) throws Exception {
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auth.inMemoryAuthentication().withUser("user").password(encoder().encode("user")).roles("USER");
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}
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@Override
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protected void configure(HttpSecurity http) throws Exception {
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http
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.addFilterAfter(new LoginPageFilter(), UsernamePasswordAuthenticationFilter.class)
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.authorizeRequests()
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.antMatchers("/loginUser").permitAll()
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.antMatchers("/user*").hasRole("USER")
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.and().formLogin().loginPage("/loginUser").loginProcessingUrl("/user_login")
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.failureUrl("/loginUser?error=loginError").defaultSuccessUrl("/userMainPage").permitAll()
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.and().logout().logoutUrl("/user_logout").logoutSuccessUrl("/loginUser").deleteCookies("JSESSIONID")
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.and().csrf().disable();
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}
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@Bean
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public static PasswordEncoder encoder() {
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return new BCryptPasswordEncoder();
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}
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}
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package com.baeldung.loginredirect;
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import org.springframework.security.authentication.AnonymousAuthenticationToken;
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import org.springframework.security.core.Authentication;
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import org.springframework.security.core.context.SecurityContextHolder;
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import org.springframework.stereotype.Controller;
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import org.springframework.web.bind.annotation.GetMapping;
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@Controller
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class UsersController {
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@GetMapping("/userMainPage")
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public String getUserPage() {
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return "userMainPage";
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}
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@GetMapping("/loginUser")
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public String getUserLoginPage() {
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if (isAuthenticated()) {
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return "redirect:userMainPage";
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}
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return "loginUser";
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}
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private boolean isAuthenticated() {
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Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
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if (authentication == null || AnonymousAuthenticationToken.class.isAssignableFrom(authentication.getClass())) {
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return false;
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}
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return authentication.isAuthenticated();
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}
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}
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<?xml version="1.0" encoding="UTF-8"?>
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<beans xmlns="http://www.springframework.org/schema/beans"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xmlns:mvc="http://www.springframework.org/schema/mvc"
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xmlns:beans="http://www.springframework.org/schema/beans"
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xmlns:security="http://www.springframework.org/schema/security"
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xsi:schemaLocation="
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http://www.springframework.org/schema/mvc
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http://www.springframework.org/schema/mvc/spring-mvc-4.3.xsd
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http://www.springframework.org/schema/security
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http://www.springframework.org/schema/security/spring-security-5.2.xsd
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http://www.springframework.org/schema/beans
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http://www.springframework.org/schema/beans/spring-beans.xsd">
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<security:authentication-manager>
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<security:authentication-provider>
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<security:user-service>
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<security:user name="user" password="{noop}user" authorities="ROLE_USER"/>
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</security:user-service>
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</security:authentication-provider>
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</security:authentication-manager>
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<security:http pattern="/**" use-expressions="true" auto-config="true">
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<security:intercept-url pattern="/loginUser" access="permitAll"/>
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<security:intercept-url pattern="/user*" access="hasRole('ROLE_USER')"/>
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<security:form-login login-page="/loginUser"
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login-processing-url="/user_login"
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authentication-failure-url="/loginUser?error=loginError"
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default-target-url="/userMainPage"/>
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<security:csrf disabled="true"/>
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<security:logout logout-url="/user_logout" delete-cookies="JSESSIONID" logout-success-url="/loginUser"/>
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<security:custom-filter after="BASIC_AUTH_FILTER" ref="loginPageFilter"/>
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</security:http>
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<beans:bean id="loginPageFilter" class="com.baeldung.loginredirect.LoginPageFilter"/>
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<mvc:interceptors>
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<mvc:interceptor>
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<mvc:mapping path="/loginUser"/>
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<bean class="com.baeldung.loginredirect.LoginPageInterceptor"/>
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</mvc:interceptor>
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</mvc:interceptors>
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</beans>
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<!DOCTYPE html>
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1" />
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<title>Baeldung Login Redirect</title>
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</head>
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<body>
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Welcome user! <a th:href="@{/user_logout}" >Logout</a>
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</body>
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</html>
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