/*
* Copyright 2002-2017 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.reactive.function.client;
import java.net.URI;
import java.util.Collections;
import java.util.Map;
import java.util.Optional;
import java.util.function.Supplier;
import java.util.stream.Stream;
import org.reactivestreams.Publisher;
import reactor.core.publisher.Mono;
import org.springframework.http.HttpCookie;
import org.springframework.http.HttpHeaders;
import org.springframework.http.HttpMethod;
import org.springframework.http.client.reactive.ClientHttpRequest;
import org.springframework.http.codec.HttpMessageWriter;
import org.springframework.http.server.reactive.ServerHttpRequest;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.reactive.function.BodyInserter;
import org.springframework.web.reactive.function.BodyInserters;
/**
* Default implementation of {@link ClientRequest.Builder}.
*
* @author Arjen Poutsma
* @since 5.0
*/
class DefaultClientRequestBuilder implements ClientRequest.Builder {
private final HttpMethod method;
private final URI url;
private final HttpHeaders headers = new HttpHeaders();
private final MultiValueMap<String, String> cookies = new LinkedMultiValueMap<>();
private BodyInserter<?, ? super ClientHttpRequest> inserter = BodyInserters.empty();
public DefaultClientRequestBuilder(HttpMethod method, URI url) {
this.method = method;
this.url = url;
}
@Override
public ClientRequest.Builder header(String headerName, String... headerValues) {
for (String headerValue : headerValues) {
this.headers.add(headerName, headerValue);
}
return this;
}
@Override
public ClientRequest.Builder headers(HttpHeaders headers) {
if (headers != null) {
this.headers.putAll(headers);
}
return this;
}
@Override
public ClientRequest.Builder cookie(String name, String value) {
this.cookies.add(name, value);
return this;
}
@Override
public ClientRequest.Builder cookies(MultiValueMap<String, String> cookies) {
if (cookies != null) {
this.cookies.putAll(cookies);
}
return this;
}
@Override
public <S, P extends Publisher<S>> ClientRequest.Builder body(P publisher,
Class<S> elementClass) {
Assert.notNull(publisher, "'publisher' must not be null");
Assert.notNull(elementClass, "'elementClass' must not be null");
this.inserter = BodyInserters.fromPublisher(publisher, elementClass);
return this;
}
@Override
public ClientRequest.Builder body(BodyInserter<?, ? super ClientHttpRequest> inserter) {
this.inserter = inserter != null ? inserter : BodyInserters.empty();
return this;
}
@Override
public ClientRequest build() {
return new BodyInserterRequest(this.method, this.url, this.headers, this.cookies,
this.inserter);
}
private static class BodyInserterRequest implements ClientRequest {
private final HttpMethod method;
private final URI url;
private final HttpHeaders headers;
private final MultiValueMap<String, String> cookies;
private final BodyInserter<?, ? super ClientHttpRequest> inserter;
public BodyInserterRequest(HttpMethod method, URI url, HttpHeaders headers,
MultiValueMap<String, String> cookies, BodyInserter<?, ? super ClientHttpRequest> inserter) {
this.method = method;
this.url = url;
this.headers = HttpHeaders.readOnlyHttpHeaders(headers);
this.cookies = CollectionUtils.unmodifiableMultiValueMap(cookies);
this.inserter = inserter;
}
@Override
public HttpMethod method() {
return this.method;
}
@Override
public URI url() {
return this.url;
}
@Override
public HttpHeaders headers() {
return this.headers;
}
@Override
public MultiValueMap<String, String> cookies() {
return this.cookies;
}
@Override
public BodyInserter<?, ? super ClientHttpRequest> body() {
return this.inserter;
}
@Override
public Mono<Void> writeTo(ClientHttpRequest request, ExchangeStrategies strategies) {
HttpHeaders requestHeaders = request.getHeaders();
if (!this.headers.isEmpty()) {
this.headers.entrySet().stream()
.filter(entry -> !requestHeaders.containsKey(entry.getKey()))
.forEach(entry -> requestHeaders
.put(entry.getKey(), entry.getValue()));
}
MultiValueMap<String, HttpCookie> requestCookies = request.getCookies();
if (!this.cookies.isEmpty()) {
this.cookies.entrySet().forEach(entry -> {
String name = entry.getKey();
entry.getValue().forEach(value -> {
HttpCookie cookie = new HttpCookie(name, value);
requestCookies.add(name, cookie);
});
});
}
return this.inserter.insert(request, new BodyInserter.Context() {
@Override
public Supplier<Stream<HttpMessageWriter<?>>> messageWriters() {
return strategies.messageWriters();
}
@Override
public Optional<ServerHttpRequest> serverRequest() {
return Optional.empty();
}
@Override
public Map<String, Object> hints() {
return Collections.emptyMap();
}
});
}
}
}