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63 changes: 63 additions & 0 deletions
63
...n/java/org/springframework/cloud/openfeign/loadbalancer/XForwardedHeadersTransformer.java
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/* | ||
* Copyright 2013-2022 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. | ||
*/ | ||
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package org.springframework.cloud.openfeign.loadbalancer; | ||
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import java.net.URI; | ||
import java.util.Collection; | ||
import java.util.Collections; | ||
import java.util.HashMap; | ||
import java.util.Map; | ||
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import feign.Request; | ||
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import org.springframework.cloud.client.ServiceInstance; | ||
import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties; | ||
import org.springframework.cloud.client.loadbalancer.reactive.ReactiveLoadBalancer; | ||
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/** | ||
* To add X-Forwarded-Host and X-Forwarded-Proto Headers. | ||
* | ||
* @author changjin wei(魏昌进) | ||
*/ | ||
public class XForwardedHeadersTransformer implements LoadBalancerFeignRequestTransformer { | ||
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private final ReactiveLoadBalancer.Factory<ServiceInstance> factory; | ||
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public XForwardedHeadersTransformer(ReactiveLoadBalancer.Factory<ServiceInstance> factory) { | ||
this.factory = factory; | ||
} | ||
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@Override | ||
public Request transformRequest(Request request, ServiceInstance instance) { | ||
if (instance == null) { | ||
return request; | ||
} | ||
LoadBalancerProperties.XForwarded xForwarded = factory.getProperties(instance.getServiceId()).getXForwarded(); | ||
if (xForwarded.isEnabled()) { | ||
Map<String, Collection<String>> headers = new HashMap<>(request.headers()); | ||
URI uri = URI.create(request.url()); | ||
String xForwardedHost = uri.getHost(); | ||
String xForwardedProto = uri.getScheme(); | ||
headers.put("X-Forwarded-Host", Collections.singleton(xForwardedHost)); | ||
headers.put("X-Forwarded-Proto", Collections.singleton(xForwardedProto)); | ||
request = Request.create(request.httpMethod(), request.url(), headers, request.body(), request.charset(), | ||
request.requestTemplate()); | ||
} | ||
return request; | ||
} | ||
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} |
98 changes: 98 additions & 0 deletions
98
...a/org/springframework/cloud/openfeign/loadbalancer/XForwardedHeadersTransformerTests.java
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/* | ||
* Copyright 2013-2022 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. | ||
*/ | ||
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package org.springframework.cloud.openfeign.loadbalancer; | ||
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import java.nio.charset.StandardCharsets; | ||
import java.util.Collection; | ||
import java.util.Collections; | ||
import java.util.HashMap; | ||
import java.util.Map; | ||
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import feign.Request; | ||
import org.junit.jupiter.api.Test; | ||
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import org.springframework.cloud.client.DefaultServiceInstance; | ||
import org.springframework.cloud.client.ServiceInstance; | ||
import org.springframework.cloud.client.loadbalancer.LoadBalancerProperties; | ||
import org.springframework.cloud.loadbalancer.support.LoadBalancerClientFactory; | ||
import org.springframework.http.HttpHeaders; | ||
import org.springframework.http.MediaType; | ||
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import static org.assertj.core.api.Assertions.assertThat; | ||
import static org.mockito.Mockito.mock; | ||
import static org.mockito.Mockito.when; | ||
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/** | ||
* Tests for | ||
* {@link XForwardedHeadersTransformer}. | ||
* | ||
* @author changjin wei(魏昌进) | ||
*/ | ||
class XForwardedHeadersTransformerTests { | ||
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private final LoadBalancerClientFactory loadBalancerClientFactory = mock(LoadBalancerClientFactory.class); | ||
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private final LoadBalancerProperties loadBalancerProperties = new LoadBalancerProperties(); | ||
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private final ServiceInstance serviceInstance = new DefaultServiceInstance("test1", "test", "test.org", 8080, | ||
false); | ||
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private final Request request = testRequest(); | ||
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private Request testRequest() { | ||
return testRequest("spring.io"); | ||
} | ||
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private Request testRequest(String host) { | ||
return Request.create(Request.HttpMethod.GET, "https://" + host + "/path", testHeaders(), "hello".getBytes(), | ||
StandardCharsets.UTF_8, null); | ||
} | ||
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private Map<String, Collection<String>> testHeaders() { | ||
Map<String, Collection<String>> feignHeaders = new HashMap<>(); | ||
feignHeaders.put(HttpHeaders.CONTENT_TYPE, Collections.singletonList(MediaType.APPLICATION_JSON_VALUE)); | ||
return feignHeaders; | ||
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} | ||
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@Test | ||
void shouldAppendXForwardedHeadersIfEnabled() { | ||
loadBalancerProperties.getXForwarded().setEnabled(true); | ||
when(loadBalancerClientFactory.getProperties("test")).thenReturn(loadBalancerProperties); | ||
XForwardedHeadersTransformer transformer = new XForwardedHeadersTransformer(loadBalancerClientFactory); | ||
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Request newRequest = transformer.transformRequest(request, serviceInstance); | ||
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assertThat(newRequest.headers()).containsKey("X-Forwarded-Host"); | ||
assertThat(newRequest.headers()).containsEntry("X-Forwarded-Host", Collections.singleton("spring.io")); | ||
assertThat(newRequest.headers()).containsKey("X-Forwarded-Proto"); | ||
assertThat(newRequest.headers()).containsEntry("X-Forwarded-Proto", Collections.singleton("https")); | ||
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} | ||
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@Test | ||
void shouldNotAppendXForwardedHeadersIfDefault() { | ||
when(loadBalancerClientFactory.getProperties("test")).thenReturn(loadBalancerProperties); | ||
XForwardedHeadersTransformer transformer = new XForwardedHeadersTransformer(loadBalancerClientFactory); | ||
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Request newRequest = transformer.transformRequest(request, serviceInstance); | ||
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assertThat(newRequest.headers()).doesNotContainKey("X-Forwarded-Host"); | ||
assertThat(newRequest.headers()).doesNotContainKey("X-Forwarded-Proto"); | ||
} | ||
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} |