org.springframework.web.client.support.RestTemplateAdapter Maven / Gradle / Ivy
/*
* Copyright 2002-2023 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.web.client.support;
import java.net.URI;
import java.util.ArrayList;
import java.util.List;
import org.springframework.core.ParameterizedTypeReference;
import org.springframework.http.HttpCookie;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.RequestEntity;
import org.springframework.http.ResponseEntity;
import org.springframework.util.Assert;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.service.invoker.HttpExchangeAdapter;
import org.springframework.web.service.invoker.HttpRequestValues;
import org.springframework.web.service.invoker.HttpServiceProxyFactory;
import org.springframework.web.util.UriBuilderFactory;
/**
* {@link HttpExchangeAdapter} that enables an {@link HttpServiceProxyFactory}
* to use {@link RestTemplate} for request execution.
*
* Use static factory methods in this class to create an
* {@link HttpServiceProxyFactory} configured with the given {@link RestTemplate}.
*
* @author Olga Maciaszek-Sharma
* @author Brian Clozel
* @since 6.1
*/
public final class RestTemplateAdapter implements HttpExchangeAdapter {
private final RestTemplate restTemplate;
private RestTemplateAdapter(RestTemplate restTemplate) {
this.restTemplate = restTemplate;
}
@Override
public boolean supportsRequestAttributes() {
return false;
}
@Override
public void exchange(HttpRequestValues values) {
this.restTemplate.exchange(newRequest(values), Void.class);
}
@Override
public HttpHeaders exchangeForHeaders(HttpRequestValues values) {
return this.restTemplate.exchange(newRequest(values), Void.class).getHeaders();
}
@Override
public T exchangeForBody(HttpRequestValues values, ParameterizedTypeReference bodyType) {
return this.restTemplate.exchange(newRequest(values), bodyType).getBody();
}
@Override
public ResponseEntity exchangeForBodilessEntity(HttpRequestValues values) {
return this.restTemplate.exchange(newRequest(values), Void.class);
}
@Override
public ResponseEntity exchangeForEntity(HttpRequestValues values, ParameterizedTypeReference bodyType) {
return this.restTemplate.exchange(newRequest(values), bodyType);
}
private RequestEntity newRequest(HttpRequestValues values) {
HttpMethod httpMethod = values.getHttpMethod();
Assert.notNull(httpMethod, "HttpMethod is required");
RequestEntity.BodyBuilder builder;
if (values.getUri() != null) {
builder = RequestEntity.method(httpMethod, values.getUri());
}
else if (values.getUriTemplate() != null) {
UriBuilderFactory uriBuilderFactory = values.getUriBuilderFactory();
if (uriBuilderFactory != null) {
URI expanded = uriBuilderFactory.expand(values.getUriTemplate(), values.getUriVariables());
builder = RequestEntity.method(httpMethod, expanded);
}
else {
builder = RequestEntity.method(httpMethod, values.getUriTemplate(), values.getUriVariables());
}
}
else {
throw new IllegalStateException("Neither full URL nor URI template");
}
builder.headers(values.getHeaders());
if (!values.getCookies().isEmpty()) {
List cookies = new ArrayList<>();
values.getCookies().forEach((name, cookieValues) -> cookieValues.forEach(value -> {
HttpCookie cookie = new HttpCookie(name, value);
cookies.add(cookie.toString());
}));
builder.header(HttpHeaders.COOKIE, String.join("; ", cookies));
}
if (values.getBodyValue() != null) {
return builder.body(values.getBodyValue());
}
return builder.build();
}
/**
* Create a {@link RestTemplateAdapter} for the given {@link RestTemplate}.
*/
public static RestTemplateAdapter create(RestTemplate restTemplate) {
return new RestTemplateAdapter(restTemplate);
}
}