org.springframework.web.reactive.function.client.DefaultWebClientBuilder Maven / Gradle / Ivy
/*
* Copyright 2002-2018 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.util.ArrayList;
import java.util.Arrays;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.function.Consumer;
import org.springframework.http.HttpHeaders;
import org.springframework.http.client.reactive.ClientHttpConnector;
import org.springframework.http.client.reactive.ReactorClientHttpConnector;
import org.springframework.lang.Nullable;
import org.springframework.util.Assert;
import org.springframework.util.CollectionUtils;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.util.DefaultUriBuilderFactory;
import org.springframework.web.util.UriBuilderFactory;
/**
* Default implementation of {@link WebClient.Builder}.
*
* @author Rossen Stoyanchev
* @since 5.0
*/
final class DefaultWebClientBuilder implements WebClient.Builder {
@Nullable
private String baseUrl;
@Nullable
private Map defaultUriVariables;
@Nullable
private UriBuilderFactory uriBuilderFactory;
@Nullable
private HttpHeaders defaultHeaders;
@Nullable
private MultiValueMap defaultCookies;
@Nullable
private List filters;
@Nullable
private ClientHttpConnector connector;
@Nullable
private ExchangeFunction exchangeFunction;
private ExchangeStrategies exchangeStrategies;
public DefaultWebClientBuilder() {
this.exchangeStrategies = ExchangeStrategies.withDefaults();
}
public DefaultWebClientBuilder(DefaultWebClientBuilder other) {
Assert.notNull(other, "DefaultWebClientBuilder must not be null");
this.baseUrl = other.baseUrl;
this.defaultUriVariables = (other.defaultUriVariables != null ?
new LinkedHashMap<>(other.defaultUriVariables) : null);
this.uriBuilderFactory = other.uriBuilderFactory;
if (other.defaultHeaders != null) {
this.defaultHeaders = new HttpHeaders();
this.defaultHeaders.putAll(other.defaultHeaders);
}
else {
this.defaultHeaders = null;
}
this.defaultCookies = (other.defaultCookies != null ?
new LinkedMultiValueMap<>(other.defaultCookies) : null);
this.filters = (other.filters != null ? new ArrayList<>(other.filters) : null);
this.connector = other.connector;
this.exchangeFunction = other.exchangeFunction;
this.exchangeStrategies = other.exchangeStrategies;
}
@Override
public WebClient.Builder baseUrl(String baseUrl) {
this.baseUrl = baseUrl;
return this;
}
@Override
public WebClient.Builder defaultUriVariables(Map defaultUriVariables) {
this.defaultUriVariables = defaultUriVariables;
return this;
}
@Override
public WebClient.Builder uriBuilderFactory(UriBuilderFactory uriBuilderFactory) {
this.uriBuilderFactory = uriBuilderFactory;
return this;
}
@Override
public WebClient.Builder defaultHeader(String headerName, String... headerValues) {
HttpHeaders headers = initHeaders();
for (String headerValue : headerValues) {
headers.add(headerName, headerValue);
}
return this;
}
@Override
public WebClient.Builder defaultHeaders(Consumer headersConsumer) {
headersConsumer.accept(initHeaders());
return this;
}
private HttpHeaders initHeaders() {
if (this.defaultHeaders == null) {
this.defaultHeaders = new HttpHeaders();
}
return this.defaultHeaders;
}
@Override
public WebClient.Builder defaultCookie(String cookieName, String... cookieValues) {
initCookies().addAll(cookieName, Arrays.asList(cookieValues));
return this;
}
@Override
public WebClient.Builder defaultCookies(Consumer> cookiesConsumer) {
cookiesConsumer.accept(initCookies());
return this;
}
private MultiValueMap initCookies() {
if (this.defaultCookies == null) {
this.defaultCookies = new LinkedMultiValueMap<>(4);
}
return this.defaultCookies;
}
@Override
public WebClient.Builder clientConnector(ClientHttpConnector connector) {
this.connector = connector;
return this;
}
@Override
public WebClient.Builder filter(ExchangeFilterFunction filter) {
Assert.notNull(filter, "ExchangeFilterFunction must not be null");
initFilters().add(filter);
return this;
}
@Override
public WebClient.Builder filters(Consumer> filtersConsumer) {
filtersConsumer.accept(initFilters());
return this;
}
private List initFilters() {
if (this.filters == null) {
this.filters = new ArrayList<>();
}
return this.filters;
}
@Override
public WebClient.Builder exchangeFunction(ExchangeFunction exchangeFunction) {
this.exchangeFunction = exchangeFunction;
return this;
}
@Override
public WebClient.Builder exchangeStrategies(ExchangeStrategies strategies) {
Assert.notNull(strategies, "ExchangeStrategies must not be null");
this.exchangeStrategies = strategies;
return this;
}
@Override
public WebClient build() {
ExchangeFunction exchange = initExchangeFunction();
ExchangeFunction filteredExchange = (this.filters != null ? this.filters.stream()
.reduce(ExchangeFilterFunction::andThen)
.map(filter -> filter.apply(exchange))
.orElse(exchange) : exchange);
return new DefaultWebClient(filteredExchange, initUriBuilderFactory(),
unmodifiableCopy(this.defaultHeaders), unmodifiableCopy(this.defaultCookies),
new DefaultWebClientBuilder(this));
}
private static @Nullable HttpHeaders unmodifiableCopy(@Nullable HttpHeaders original) {
if (original != null) {
return HttpHeaders.readOnlyHttpHeaders(original);
}
else {
return null;
}
}
private static @Nullable MultiValueMap unmodifiableCopy(@Nullable MultiValueMap original) {
if (original != null) {
return CollectionUtils.unmodifiableMultiValueMap(new LinkedMultiValueMap<>(original));
}
else {
return null;
}
}
private UriBuilderFactory initUriBuilderFactory() {
if (this.uriBuilderFactory != null) {
return this.uriBuilderFactory;
}
DefaultUriBuilderFactory factory = this.baseUrl != null ?
new DefaultUriBuilderFactory(this.baseUrl) : new DefaultUriBuilderFactory();
factory.setDefaultUriVariables(this.defaultUriVariables);
return factory;
}
private ExchangeFunction initExchangeFunction() {
if (this.exchangeFunction != null) {
return this.exchangeFunction;
}
else if (this.connector != null) {
return ExchangeFunctions.create(this.connector, this.exchangeStrategies);
}
else {
return ExchangeFunctions.create(new ReactorClientHttpConnector(), this.exchangeStrategies);
}
}
@Override
public WebClient.Builder clone() {
return new DefaultWebClientBuilder(this);
}
@Override
public WebClient.Builder apply(Consumer builderConsumer) {
builderConsumer.accept(this);
return this;
}
}