Merge pull request #771 from andrewtobilko/master

Writing a Custom Filter in Spring Security

spring-security-basic-auth/src/main/java/org/baeldung/security/filter/CustomFilter.java

@@ -0,0 +1,18 @@
+package org.baeldung.security.filter;
+
+import org.springframework.web.filter.GenericFilterBean;
+
+import javax.servlet.FilterChain;
+import javax.servlet.ServletException;
+import javax.servlet.ServletRequest;
+import javax.servlet.ServletResponse;
+import java.io.IOException;
+
+public class CustomFilter extends GenericFilterBean {
+
+    @Override
+    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
+        chain.doFilter(request, response);
+    }
+
+}

spring-security-basic-auth/src/main/java/org/baeldung/security/filter/configuration/CustomWebSecurityConfigurerAdapter.java

@@ -0,0 +1,17 @@
+package org.baeldung.security.filter.configuration;
+
+import org.baeldung.security.filter.CustomFilter;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.security.config.annotation.web.builders.HttpSecurity;
+import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
+import org.springframework.security.web.authentication.www.BasicAuthenticationFilter;
+
+@Configuration
+public class CustomWebSecurityConfigurerAdapter extends WebSecurityConfigurerAdapter {
+
+    @Override
+    protected void configure(HttpSecurity http) throws Exception {
+        http.addFilterAfter(new CustomFilter(), BasicAuthenticationFilter.class);
+    }
+
+}

spring-security-basic-auth/src/main/resources/webSecurityConfig.xml

@@ -12,6 +12,7 @@
 
         <http-basic entry-point-ref="myBasicAuthenticationEntryPoint"/>
 
+        <custom-filter after="BASIC_AUTH_FILTER" ref="myFilter" />
     </http>
 
     <authentication-manager>
@@ -22,4 +23,6 @@
         </authentication-provider>
     </authentication-manager>
 
+    <beans:bean id="myFilter" class="org.baeldung.security.filter.CustomFilter"/>
+
 </beans:beans>