Java tutorial
/* * Copyright 2013-2019 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 * * https://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.cloud.gateway.filter.headers; import java.net.URI; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import org.junit.Test; import org.junit.runner.RunWith; import reactor.core.publisher.Mono; import org.springframework.beans.factory.annotation.Value; import org.springframework.boot.SpringBootConfiguration; import org.springframework.boot.autoconfigure.EnableAutoConfiguration; import org.springframework.boot.test.context.SpringBootTest; import org.springframework.cloud.gateway.filter.GlobalFilter; import org.springframework.cloud.gateway.route.RouteLocator; import org.springframework.cloud.gateway.route.builder.RouteLocatorBuilder; import org.springframework.cloud.gateway.test.BaseWebClientTests; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Import; import org.springframework.core.annotation.Order; import org.springframework.http.HttpHeaders; import org.springframework.test.annotation.DirtiesContext; import org.springframework.test.context.junit4.SpringRunner; import org.springframework.web.reactive.function.client.WebClient; import org.springframework.web.util.UriComponentsBuilder; import static org.assertj.core.api.Assertions.assertThat; import static org.springframework.boot.test.context.SpringBootTest.WebEnvironment.DEFINED_PORT; @RunWith(SpringRunner.class) @SpringBootTest(webEnvironment = DEFINED_PORT, properties = { "server.port=62175" }) @DirtiesContext public class NonStandardHeadersInResponseTests extends BaseWebClientTests { public static final String CONTENT_TYPE_IMAGE = "image"; @Test public void nonStandardHeadersInResponse() { URI uri = UriComponentsBuilder.fromUriString(this.baseUri + "/get-image").build(true).toUri(); String contentType = WebClient.builder().baseUrl(baseUri).build().get().uri(uri).exchange() .map(clientResponse -> clientResponse.headers().asHttpHeaders().getFirst(HttpHeaders.CONTENT_TYPE)) .block(); assertThat(contentType).isEqualTo(CONTENT_TYPE_IMAGE); } @EnableAutoConfiguration @SpringBootConfiguration @Import(DefaultTestConfig.class) public static class TestConfig { private static final Log log = LogFactory.getLog(TestConfig.class); @Value("${test.uri}") String uri; @Value("${server.port}") int port; @Bean @Order(5001) public GlobalFilter addNonStandardHeaderFilter() { return (exchange, chain) -> { log.info("addNonStandardHeaderFilter pre phase"); return chain.filter(exchange).then(Mono.fromRunnable(() -> { log.info("addNonStandardHeaderFilter post phase"); exchange.getResponse().getHeaders().set(HttpHeaders.CONTENT_TYPE, CONTENT_TYPE_IMAGE); })); }; } @Bean public RouteLocator testRouteLocator(RouteLocatorBuilder builder) { return builder.routes().route("non_standard_header_route", r -> r.path("/get-image/**") .filters( f -> f.addRequestHeader(HttpHeaders.HOST, "www.addrequestparameter.org").stripPrefix(1)) .uri("http://localhost:" + port + "/get")) .route("internal_route", r -> r.path("/get/**").filters(f -> f.prefixPath("/httpbin")).uri(uri)) .build(); } } }