add central logout support for springboot (#388)

* add dependence to generated metadata for springboot

* add central logout support for springboot

README.md

@@ -723,6 +723,7 @@ cas.validation-type=SAML
 
 ### Available optional properties
 
+* `cas.single-logout.enabled`
 * `cas.authentication-url-patterns`
 * `cas.validation-url-patterns`
 * `cas.request-wrapper-url-patterns`

cas-client-support-springboot/pom.xml

@@ -58,6 +58,15 @@
             <artifactId>spring-context</artifactId>
             <scope>provided</scope>
         </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-configuration-processor</artifactId>
+            <optional>true</optional>
+            <version>${springboot.version}</version>
+            <scope>provided</scope>
+        </dependency>
+
         <!-- Test dependencies -->
         <dependency>
             <groupId>org.jasig.cas.client</groupId>

cas-client-support-springboot/src/main/java/org/jasig/cas/client/boot/configuration/CasClientConfiguration.java

@@ -20,6 +20,8 @@ package org.jasig.cas.client.boot.configuration;
 
 import org.jasig.cas.client.authentication.AuthenticationFilter;
 import org.jasig.cas.client.authentication.Saml11AuthenticationFilter;
+import org.jasig.cas.client.session.SingleSignOutFilter;
+import org.jasig.cas.client.session.SingleSignOutHttpSessionListener;
 import org.jasig.cas.client.util.AssertionThreadLocalFilter;
 import org.jasig.cas.client.util.HttpServletRequestWrapperFilter;
 import org.jasig.cas.client.validation.Cas20ProxyReceivingTicketValidationFilter;
@@ -29,8 +31,10 @@ import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
 import org.springframework.boot.context.properties.EnableConfigurationProperties;
 import org.springframework.boot.web.servlet.FilterRegistrationBean;
+import org.springframework.boot.web.servlet.ServletListenerRegistrationBean;
 import org.springframework.context.annotation.Bean;
 import org.springframework.context.annotation.Configuration;
+import org.springframework.core.Ordered;
 import org.springframework.util.CollectionUtils;
 import org.springframework.util.StringUtils;
 
@@ -40,6 +44,7 @@ import java.util.Collection;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.EventListener;
 
 /**
  * Configuration class providing default CAS client infrastructure filters.
@@ -199,4 +204,25 @@ public class CasClientConfiguration {
         }
         this.casClientConfigurer = configurers.iterator().next();
     }
+
+    @Bean
+    @ConditionalOnProperty(prefix = "cas", value = "single-logout.enabled", havingValue = "true")
+    public FilterRegistrationBean casSingleSignOutFilter() {
+        final FilterRegistrationBean singleSignOutFilter = new FilterRegistrationBean();
+        singleSignOutFilter.setFilter(new SingleSignOutFilter());
+        Map<String,String> initParameters = new HashMap<>(1);
+        initParameters.put("casServerUrlPrefix", configProps.getServerUrlPrefix());
+        singleSignOutFilter.setInitParameters(initParameters);
+        singleSignOutFilter.setOrder(Ordered.HIGHEST_PRECEDENCE);
+        return singleSignOutFilter;
+    }
+
+    @Bean
+    @ConditionalOnProperty(prefix = "cas", value = "single-logout.enabled", havingValue = "true")
+    public ServletListenerRegistrationBean<EventListener> casSingleSignOutListener(){
+        ServletListenerRegistrationBean<EventListener> singleSignOutListener = new ServletListenerRegistrationBean<>();
+        singleSignOutListener.setListener(new SingleSignOutHttpSessionListener());
+        singleSignOutListener.setOrder(Ordered.HIGHEST_PRECEDENCE);
+        return singleSignOutListener;
+    }
 }

cas-client-support-springboot/src/main/java/org/jasig/cas/client/boot/configuration/CasClientConfigurationProperties.java

@@ -115,6 +115,24 @@ public class CasClientConfigurationProperties {
 
     private Boolean skipTicketValidation = false;
 
+    private SingleLogout singleLogout;
+
+    public static class SingleLogout{
+        /**
+         * whether to receive the single logout request from cas server.
+         */
+        private boolean enabled = false;
+
+        public boolean isEnabled() {
+            return enabled;
+        }
+
+        public void setEnabled(boolean enabled) {
+            this.enabled = enabled;
+        }
+    }
+
+
     public String getServerUrlPrefix() {
         return serverUrlPrefix;
     }
@@ -242,4 +260,13 @@ public class CasClientConfigurationProperties {
     public void setSkipTicketValidation(final Boolean skipTicketValidation) {
         this.skipTicketValidation = skipTicketValidation;
     }
+
+    public SingleLogout getSingleLogout() {
+        return singleLogout;
+    }
+
+    public void setSingleLogout(SingleLogout singleLogout) {
+        this.singleLogout = singleLogout;
+    }
+
 }