#authentication
在springboot中，如何配置authentication-url-patterns以实现cas单点登录？
在Spring Boot中，要配置CAS单点登录，你需要使用Spring Security和Spring Security CAS。以下是如何配置`authentication-url-patterns`以实现CAS单点登录的答案：
1. 首先，在`pom.xml`文件中添加Spring Security和Spring Security CAS的依赖：
```xml<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency><dependency>
<groupId>org.springframework.security</groupId>
<artifactId>spring-security-cas</artifactId>
</dependency>
```
2. 创建一个Java配置类，继承`WebSecurityConfigurerAdapter`，并覆盖`configure`方法。在这个方法中，你可以配置`authentication-url-patterns`以实现CAS单点登录。
```java
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.cas.ServiceProperties;
import org.springframework.security.cas.authentication.CasAuthenticationProvider;
import org.springframework.security.cas.web.CasAuthenticationEntryPoint;
import org.springframework.security.cas.web.CasAuthenticationFilter;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.web.authentication.SimpleUrlAuthenticationFailureHandler;
@Configuration
public class CasSecurityConfig extends WebSecurityConfigurerAdapter {
@Value("${cas.server.url}")
private String casServerUrl;
@Value("${cas.service.url}")
private String casServiceUrl;
@Bean
public ServiceProperties serviceProperties() {
ServiceProperties serviceProperties = new ServiceProperties();
serviceProperties.setService(casServiceUrl);
serviceProperties.setSendRenew(false);
return serviceProperties;
}
@Bean
public CasAuthenticationEntryPoint casAuthenticationEntryPoint() {
CasAuthenticationEntryPoint casAuthenticationEntryPoint = new CasAuthenticationEntryPoint();
casAuthenticationEntryPoint.setLoginUrl(casServerUrl + "/login");
casAuthenticationEntryPoint.setServiceProperties(serviceProperties());
return casAuthenticationEntryPoint;
}
@Bean
public CasAuthenticationFilter casAuthenticationFilter() throws Exception {
CasAuthenticationFilter casAuthenticationFilter = new CasAuthenticationFilter();
casAuthenticationFilter.setAuthenticationManager(authenticationManager());
casAuthenticationFilter.setFilterProcessesUrl("/j_spring_cas_security_check");
casAuthenticationFilter.setAuthenticationFailureHandler(new SimpleUrlAuthenticationFailureHandler("/login/cas?error"));
return casAuthenticationFilter;
}
@Bean
public CasAuthenticationProvider casAuthenticationProvider() {
CasAuthenticationProvider casAuthenticationProvider = new CasAuthenticationProvider();
casAuthenticationProvider.setUserDetailsService(userDetailsService());
casAuthenticationProvider.setServiceProperties(serviceProperties());
casAuthenticationProvider.setTicketValidator(new Cas20ServiceTicketValidator(casServerUrl));
casAuthenticationProvider.setKey("casAuthenticationProviderKey");
return casAuthenticationProvider;
}
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
auth.authenticationProvider(casAuthenticationProvider());
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http
.authorizeRequests()
.antMatchers("/login/cas").permitAll()
.anyRequest().authenticated()
.and()
.exceptionHandling()
.authenticationEntryPoint(casAuthenticationEntryPoint())
.and()
.addFilter(casAuthenticationFilter())
.csrf().disable()
.logout()
.logoutUrl("/logout")
.logoutSuccessUrl(casServerUrl + "/logout");
}
@Bean
public UserDetailsService userDetailsService() {
// 在这里实现你的UserDetailsService，用于加载用户信息
return new CustomUserDetailsService();
}
}
```
在这个配置类中，我们配置了CAS服务器的URL、CAS服务的URL、CAS认证入口点、CAS认证过滤器、CAS认证提供者等组件。同时，我们还配置了`authentication-url-patterns`，允许对`/login/cas`和其他请求进行认证。
注意：在实际应用中，你需要实现一个自定义的`UserDetailsService`，用于加载用户信息。这里的`CustomUserDetailsService`只是一个占位符。
此外，你还需要在`application.properties`或`application.yml`文件中配置CAS服务器的URL和CAS服务的URL：
```properties
cas.server.url=https://your-cas-server.com
cas.service.url=https://your-app.com
```
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