/*
* Copyright 2002-2015 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.web.server.handler;
import java.net.URI;
import org.junit.Before;
import org.junit.Test;
import reactor.core.publisher.Mono;
import org.springframework.http.HttpMethod;
import org.springframework.http.HttpStatus;
import org.springframework.http.server.reactive.MockServerHttpRequest;
import org.springframework.http.server.reactive.MockServerHttpResponse;
import org.springframework.web.server.ServerWebExchange;
import org.springframework.web.server.WebExceptionHandler;
import org.springframework.web.server.WebHandler;
import org.springframework.web.server.adapter.DefaultServerWebExchange;
import org.springframework.web.server.session.MockWebSessionManager;
import org.springframework.web.server.session.WebSessionManager;
import static org.junit.Assert.assertEquals;
/**
* @author Rossen Stoyanchev
*/
@SuppressWarnings("ThrowableResultOfMethodCallIgnored")
public class ExceptionHandlingHttpHandlerTests {
private MockServerHttpResponse response;
private ServerWebExchange exchange;
private WebHandler targetHandler;
@Before
public void setUp() throws Exception {
URI uri = new URI("http://localhost:8080");
WebSessionManager sessionManager = new MockWebSessionManager();
MockServerHttpRequest request = new MockServerHttpRequest(HttpMethod.GET, uri);
this.response = new MockServerHttpResponse();
this.exchange = new DefaultServerWebExchange(request, this.response, sessionManager);
this.targetHandler = new StubWebHandler(new IllegalStateException("boo"));
}
@Test
public void handleErrorSignal() throws Exception {
WebExceptionHandler exceptionHandler = new BadRequestExceptionHandler();
createWebHandler(exceptionHandler).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.response.getStatusCode());
}
@Test
public void handleErrorSignalWithMultipleHttpErrorHandlers() throws Exception {
WebExceptionHandler[] exceptionHandlers = new WebExceptionHandler[] {
new UnresolvedExceptionHandler(),
new UnresolvedExceptionHandler(),
new BadRequestExceptionHandler(),
new UnresolvedExceptionHandler()
};
createWebHandler(exceptionHandlers).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.response.getStatusCode());
}
@Test
public void unresolvedException() throws Exception {
WebExceptionHandler exceptionHandler = new UnresolvedExceptionHandler();
createWebHandler(exceptionHandler).handle(this.exchange).block();
assertEquals(HttpStatus.INTERNAL_SERVER_ERROR, this.response.getStatusCode());
}
@Test
public void thrownExceptionBecomesErrorSignal() throws Exception {
WebExceptionHandler exceptionHandler = new BadRequestExceptionHandler();
createWebHandler(exceptionHandler).handle(this.exchange).block();
assertEquals(HttpStatus.BAD_REQUEST, this.response.getStatusCode());
}
private WebHandler createWebHandler(WebExceptionHandler... handlers) {
return new ExceptionHandlingWebHandler(this.targetHandler, handlers);
}
private static class StubWebHandler implements WebHandler {
private final RuntimeException exception;
private final boolean raise;
public StubWebHandler(RuntimeException exception) {
this(exception, false);
}
public StubWebHandler(RuntimeException exception, boolean raise) {
this.exception = exception;
this.raise = raise;
}
@Override
public Mono<Void> handle(ServerWebExchange exchange) {
if (this.raise) {
throw this.exception;
}
return Mono.error(this.exception);
}
}
private static class BadRequestExceptionHandler implements WebExceptionHandler {
@Override
public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
exchange.getResponse().setStatusCode(HttpStatus.BAD_REQUEST);
return Mono.empty();
}
}
/** Leave the exception unresolved. */
private static class UnresolvedExceptionHandler implements WebExceptionHandler {
@Override
public Mono<Void> handle(ServerWebExchange exchange, Throwable ex) {
return Mono.error(ex);
}
}
}