Handling accessDenied

spring-security-rest-full/src/main/java/org/baeldung/spring/SecSecurityConfig.java

@@ -1,16 +1,58 @@
 package org.baeldung.spring;
 
+import org.baeldung.web.error.CustomAccessDeniedHandler;
+import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
 import org.springframework.context.annotation.Configuration;
-import org.springframework.context.annotation.ImportResource;
+import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
+import org.springframework.security.config.annotation.method.configuration.EnableGlobalMethodSecurity;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.builders.WebSecurity;
+import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
 @Configuration
 @EnableAutoConfiguration
-@ImportResource({ "classpath:webSecurityConfig.xml" })
-public class SecSecurityConfig {
+//
+@EnableWebSecurity
+@EnableGlobalMethodSecurity(prePostEnabled = true)
+// @ImportResource({ "classpath:webSecurityConfig.xml" })
+public class SecSecurityConfig extends WebSecurityConfigurerAdapter {
+
+    @Autowired
+    private CustomAccessDeniedHandler accessDeniedHandler;
 
     public SecSecurityConfig() {
         super();
     }
 
+    // java config
+
+    @Override
+    protected void configure(final AuthenticationManagerBuilder auth) throws Exception {
+        auth.inMemoryAuthentication().withUser("user1").password("user1Pass").authorities("ROLE_USER").and().withUser("admin").password("adminPass").authorities("ROLE_ADMIN");
+    }
+
+    @Override
+    public void configure(final WebSecurity web) throws Exception {
+        web.ignoring().antMatchers("/resources/**");
+    }
+
+    @Override
+    protected void configure(final HttpSecurity http) throws Exception {
+        // @formatter:off
+        http
+        .csrf().disable()
+        .authorizeRequests()
+        .antMatchers("/admin/*").hasAnyRole("ROLE_ADMIN")
+        .anyRequest().authenticated()
+        .and()
+        .httpBasic()
+        .and()
+        // .exceptionHandling().accessDeniedPage("/my-error-page")
+        .exceptionHandling().accessDeniedHandler(accessDeniedHandler)
+        ;
+        // @formatter:on
+    }
+
 }

spring-security-rest-full/src/main/java/org/baeldung/web/controller/RootController.java

@@ -11,6 +11,7 @@ import org.baeldung.web.metric.IMetricService;
 import org.baeldung.web.util.LinkUtil;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
+import org.springframework.security.access.prepost.PreAuthorize;
 import org.springframework.stereotype.Controller;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RequestMethod;
@@ -51,6 +52,7 @@ public class RootController {
         return metricService.getFullMetric();
     }
 
+    @PreAuthorize("hasRole('ROLE_ADMIN')")
     @RequestMapping(value = "/status-metric", method = RequestMethod.GET)
     @ResponseBody
     public Map getStatusMetric() {
@@ -67,9 +69,16 @@ public class RootController {
         return result;
     }
 
-    @RequestMapping(value = "/metric-graph-data", method = RequestMethod.GET)
+    @RequestMapping(value = "/admin/x", method = RequestMethod.GET)
     @ResponseBody
-    public Object[][] getActuatorMetricData() {
-        return actMetricService.getGraphData();
+    public String sampleAdminPage() {
+        return "Hello";
     }
+
+    @RequestMapping(value = "/my-error-page", method = RequestMethod.GET)
+    @ResponseBody
+    public String sampleErrorPage() {
+        return "Error Occurred";
+    }
+
 }

spring-security-rest-full/src/main/java/org/baeldung/web/error/CustomAccessDeniedHandler.java

@@ -0,0 +1,22 @@
+package org.baeldung.web.error;
+
+import java.io.IOException;
+
+import javax.servlet.ServletException;
+import javax.servlet.http.HttpServletRequest;
+import javax.servlet.http.HttpServletResponse;
+
+import org.springframework.security.access.AccessDeniedException;
+import org.springframework.security.web.access.AccessDeniedHandler;
+import org.springframework.stereotype.Component;
+
+@Component
+public class CustomAccessDeniedHandler implements AccessDeniedHandler {
+
+    @Override
+    public void handle(final HttpServletRequest request, final HttpServletResponse response, final AccessDeniedException ex) throws IOException, ServletException {
+        response.getOutputStream().print("Error Message Goes Here");
+        // response.sendRedirect("/my-error-page");
+    }
+
+}

spring-security-rest-full/src/main/java/org/baeldung/web/error/RestResponseEntityExceptionHandler.java

@@ -11,11 +11,13 @@ import org.springframework.http.HttpHeaders;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.http.converter.HttpMessageNotReadableException;
+import org.springframework.security.access.AccessDeniedException;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.ControllerAdvice;
 import org.springframework.web.bind.annotation.ExceptionHandler;
 import org.springframework.web.context.request.WebRequest;
 import org.springframework.web.servlet.mvc.method.annotation.ResponseEntityExceptionHandler;
+//import org.springframework.security.access.AccessDeniedException;
 
 @ControllerAdvice
 public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionHandler {
@@ -54,6 +56,11 @@ public class RestResponseEntityExceptionHandler extends ResponseEntityExceptionH
     }
 
     // 403
+    @ExceptionHandler({ AccessDeniedException.class })
+    public ResponseEntity<Object> handleAccessDeniedException(final Exception ex, final WebRequest request) {
+        System.out.println("request" + request.getUserPrincipal());
+        return new ResponseEntity<Object>("Access denied message here", new HttpHeaders(), HttpStatus.FORBIDDEN);
+    }
 
     // 404
 

spring-security-rest-full/src/main/resources/webSecurityConfig.xml

@@ -9,19 +9,24 @@
 
     <http pattern="/securityNone" security="none"/>
 
-    <http use-expressions="true">
+    <http use-expressions="true" >
+        <intercept-url pattern="/admin/*" access="hasAnyRole('ROLE_ADMIN')"/>
         <intercept-url pattern="/**" access="isAuthenticated()"/>
 
         <http-basic/>
 
         <csrf disabled="true"/>
         
+        <!-- <access-denied-handler error-page="/my-error-page" /> -->
+        
+        <access-denied-handler ref="customAccessDeniedHandler" />
     </http>
 
     <authentication-manager>
         <authentication-provider>
             <user-service>
                 <user name="user1" password="user1Pass" authorities="ROLE_USER"/>
+                <user name="admin" password="adminPass" authorities="ROLE_ADMIN"/>
             </user-service>
         </authentication-provider>
     </authentication-manager>