DelegatingFilterProxy not found WebApplicationContext when start context with AbstractAnnotationConfigDispatcherHandlerInitializer [SPR-16096]

[spring-projects-issues]

José María Sola Durán opened SPR-16096 and commented

I start a new project with Spring WebFlux. I want integrate this project with the new version of Spring Security 5.0.0.M5. I start the WebFlux context with WebAppInitializer, in particular extends the abstract class AbstractAnnotationConfigDispatcherHandlerInitializer. The code is below

public class WebAppInitializer extends AbstractAnnotationConfigDispatcherHandlerInitializer {
	@Override
	public void onStartup(ServletContext servletContext) throws ServletException {
		super.onStartup(servletContext);
		
		/* Spring Security Filter */
		FilterRegistration.Dynamic securityFilterRegistration = servletContext.addFilter(DelegatingFilterProxy.class.getSimpleName(), DelegatingFilterProxy.class);
		securityFilterRegistration.setAsyncSupported(true);
		securityFilterRegistration.addMappingForUrlPatterns(EnumSet.of(DispatcherType.REQUEST, DispatcherType.ASYNC), false, "/*");
	}
	
	@Override
	protected String getServletMapping() {
		return "/api/*";
	}

	@Override
	protected Class<?>[] getConfigClasses() {
		return Stream.of(AppConfig.class, SpringWebFluxConfig.class).toArray(size -> new Class<?>[size]);
	}
}

But when I send a request for de API, I obtaing the next exception:

java.lang.IllegalStateException: No WebApplicationContext found: no ContextLoaderListener or DispatcherServlet registered?
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:474)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)
	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:783)
	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)
	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:789)
	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1437)
	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)

AbstractAnnotationConfigDispatcherHandlerInitializer instance a HttpHandler for Non I/O Blocking request, but ¿why DelegatingProxy not found WebApplicationContext if it's started?

I attach the complete log of Tomcat 8.5.x server.

---

Affects: 5.0 GA

Attachments:

• catalina.out (16.89 kB)

[spring-projects-issues]

José María Sola Durán commented

It's works if copy partial code of AbstractSecurityWebApplicationInitializer#onStartup() method, in my WebAppInitializer. The code is the next:

@Override
	public void onStartup(ServletContext servletContext) throws ServletException {
		/* Start root context Spring and Security context */
		AnnotationConfigWebApplicationContext rootAppContext = new AnnotationConfigWebApplicationContext();
		rootAppContext.register(AppConfig.class);
		servletContext.addListener(new ContextLoaderListener(rootAppContext));
		servletContext.addListener(HttpSessionEventPublisher.class);
		servletContext.addListener(RequestContextListener.class);

		servletContext.setSessionTrackingModes(EnumSet.of(SessionTrackingMode.COOKIE));
		String filterName = "springSecurityFilterChain";
		DelegatingFilterProxy springSecurityFilterChain = new DelegatingFilterProxy(filterName);
		Dynamic registration = servletContext.addFilter(filterName, springSecurityFilterChain);
		if (registration == null) {
			throw new IllegalStateException("Duplicate Filter registration for '" + filterName
					+ "'. Check to ensure the Filter is only configured once.");
		}
		registration.setAsyncSupported(true);
		EnumSet<DispatcherType> dispatcherTypes = EnumSet.of(DispatcherType.REQUEST, DispatcherType.ERROR,
				DispatcherType.ASYNC);
		registration.addMappingForUrlPatterns(dispatcherTypes, false, "/*");

		super.onStartup(servletContext);
	}

I need explicitly start ContextLoaderListener, in order to the DelegatingFilterProxy finds WebApplicationContext. ¿It's correct? I think that I shouldn't start ContextLoaderListener manually.

[spring-projects-issues]

Rossen Stoyanchev commented

WebFlux uses the Servlet API only as a low level adapter layer. It does not expose the Servlet API in any way because it is synchronous (e.g. javax.servlet.Filter return void) and also because it cannot be used as a common abstraction over servers with native APIs (e.g. Netty, Undertow). WebFlux provides its own WebFilter which has a non-blocking contract and consequently Spring Security uses Spring Web reactive APIs to integrate with WebFlux. So you're going down the wrong path there trying to bring in a DelegatingFilterProxy.

Spring Security provides @EnableWebFluxSecurity based configuration. See the sample and also some comments from the M4 blog post.

[spring-projects-issues]

Rossen Stoyanchev commented

Resolving but feel free to comment.

[spring-projects-issues]

José María Sola Durán commented

Thanks for the quick answer.

I will try it with this solution and I will tell you my feedback.