/*
* Copyright 2012-2016 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.boot.test.web.client;
import java.io.IOException;
import java.io.OutputStream;
import java.net.URI;
import java.net.URISyntaxException;
import org.springframework.boot.web.client.RootUriTemplateHandler;
import org.springframework.http.client.ClientHttpRequest;
import org.springframework.http.client.ClientHttpResponse;
import org.springframework.http.client.support.HttpRequestWrapper;
import org.springframework.mock.http.client.MockClientHttpRequest;
import org.springframework.test.web.client.ExpectedCount;
import org.springframework.test.web.client.MockRestServiceServer;
import org.springframework.test.web.client.MockRestServiceServer.MockRestServiceServerBuilder;
import org.springframework.test.web.client.RequestExpectationManager;
import org.springframework.test.web.client.RequestMatcher;
import org.springframework.test.web.client.ResponseActions;
import org.springframework.test.web.client.SimpleRequestExpectationManager;
import org.springframework.util.Assert;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.util.UriTemplateHandler;
/**
* {@link RequestExpectationManager} that strips the specified root URI from the request
* before verification. Can be used to simply test declarations when all REST calls start
* the same way. For example: <pre class="code">
* RestTemplate restTemplate = new RestTemplateBuilder().rootUri("http://example.com").build();
* MockRestServiceServer server = RootUriRequestExpectationManager.bindTo(restTemplate);
* server.expect(requestTo("/hello")).andRespond(withSuccess());
* restTemplate.getForEntity("/hello", String.class);
* </pre>
*
* @author Phillip Webb
* @since 1.4.0
* @see RootUriTemplateHandler
* @see #bindTo(RestTemplate)
* @see #forRestTemplate(RestTemplate, RequestExpectationManager)
*/
public class RootUriRequestExpectationManager implements RequestExpectationManager {
private final String rootUri;
private final RequestExpectationManager expectationManager;
public RootUriRequestExpectationManager(String rootUri,
RequestExpectationManager expectationManager) {
Assert.notNull(rootUri, "RootUri must not be null");
Assert.notNull(expectationManager, "ExpectationManager must not be null");
this.rootUri = rootUri;
this.expectationManager = expectationManager;
}
@Override
public ResponseActions expectRequest(ExpectedCount count,
RequestMatcher requestMatcher) {
return this.expectationManager.expectRequest(count, requestMatcher);
}
@Override
public ClientHttpResponse validateRequest(ClientHttpRequest request)
throws IOException {
String uri = request.getURI().toString();
if (uri.startsWith(this.rootUri)) {
request = replaceURI(request, uri.substring(this.rootUri.length()));
}
try {
return this.expectationManager.validateRequest(request);
}
catch (AssertionError ex) {
String message = ex.getMessage();
String prefix = "Request URI expected:</";
if (message != null && message.startsWith(prefix)) {
throw new AssertionError("Request URI expected:<" + this.rootUri
+ message.substring(prefix.length() - 1));
}
throw ex;
}
}
private ClientHttpRequest replaceURI(ClientHttpRequest request,
String replacementUri) {
URI uri;
try {
uri = new URI(replacementUri);
if (request instanceof MockClientHttpRequest) {
((MockClientHttpRequest) request).setURI(uri);
return request;
}
return new ReplaceUriClientHttpRequest(uri, request);
}
catch (URISyntaxException ex) {
throw new IllegalStateException(ex);
}
}
@Override
public void verify() {
this.expectationManager.verify();
}
@Override
public void reset() {
this.expectationManager.reset();
}
/**
* Return a bound {@link MockRestServiceServer} for the given {@link RestTemplate},
* configured with {@link RootUriRequestExpectationManager} when possible.
* @param restTemplate the source REST template
* @return a configured {@link MockRestServiceServer}
*/
public static MockRestServiceServer bindTo(RestTemplate restTemplate) {
return bindTo(restTemplate, new SimpleRequestExpectationManager());
}
/**
* Return a bound {@link MockRestServiceServer} for the given {@link RestTemplate},
* configured with {@link RootUriRequestExpectationManager} when possible.
* @param restTemplate the source REST template
* @param expectationManager the source {@link RequestExpectationManager}
* @return a configured {@link MockRestServiceServer}
*/
public static MockRestServiceServer bindTo(RestTemplate restTemplate,
RequestExpectationManager expectationManager) {
MockRestServiceServerBuilder builder = MockRestServiceServer.bindTo(restTemplate);
return builder.build(forRestTemplate(restTemplate, expectationManager));
}
/**
* Return {@link RequestExpectationManager} to be used for binding with the specified
* {@link RestTemplate}. If the {@link RestTemplate} is using a
* {@link RootUriTemplateHandler} then a {@link RootUriRequestExpectationManager} is
* returned, otherwise the source manager is returned unchanged.
* @param restTemplate the source REST template
* @param expectationManager the source {@link RequestExpectationManager}
* @return a {@link RequestExpectationManager} to be bound to the template
*/
public static RequestExpectationManager forRestTemplate(RestTemplate restTemplate,
RequestExpectationManager expectationManager) {
Assert.notNull(restTemplate, "RestTemplate must not be null");
UriTemplateHandler templateHandler = restTemplate.getUriTemplateHandler();
if (templateHandler instanceof RootUriTemplateHandler) {
return new RootUriRequestExpectationManager(
((RootUriTemplateHandler) templateHandler).getRootUri(),
expectationManager);
}
return expectationManager;
}
/**
* {@link ClientHttpRequest} wrapper to replace the request URI.
*/
private static class ReplaceUriClientHttpRequest extends HttpRequestWrapper
implements ClientHttpRequest {
private final URI uri;
ReplaceUriClientHttpRequest(URI uri, ClientHttpRequest request) {
super(request);
this.uri = uri;
}
@Override
public URI getURI() {
return this.uri;
}
@Override
public OutputStream getBody() throws IOException {
return getRequest().getBody();
}
@Override
public ClientHttpResponse execute() throws IOException {
return getRequest().execute();
}
@Override
public ClientHttpRequest getRequest() {
return (ClientHttpRequest) super.getRequest();
}
}
}