001/*
002 * Copyright 2012-2018 the original author or authors.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *      http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 */
016
017package org.springframework.boot.docs.web.client;
018
019import org.apache.http.HttpException;
020import org.apache.http.HttpHost;
021import org.apache.http.HttpRequest;
022import org.apache.http.client.HttpClient;
023import org.apache.http.impl.client.HttpClientBuilder;
024import org.apache.http.impl.conn.DefaultProxyRoutePlanner;
025import org.apache.http.protocol.HttpContext;
026
027import org.springframework.boot.web.client.RestTemplateCustomizer;
028import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
029import org.springframework.web.client.RestTemplate;
030
031/**
032 * Example configuration for using a {@link RestTemplateCustomizer} to configure a proxy.
033 *
034 * @author Andy Wilkinson
035 */
036public class RestTemplateProxyCustomizationExample {
037
038        /**
039         * A {@link RestTemplateCustomizer} that applies an HttpComponents-based request
040         * factory that is configured to use a proxy.
041         */
042        // tag::customizer[]
043        static class ProxyCustomizer implements RestTemplateCustomizer {
044
045                @Override
046                public void customize(RestTemplate restTemplate) {
047                        HttpHost proxy = new HttpHost("proxy.example.com");
048                        HttpClient httpClient = HttpClientBuilder.create()
049                                        .setRoutePlanner(new DefaultProxyRoutePlanner(proxy) {
050
051                                                @Override
052                                                public HttpHost determineProxy(HttpHost target,
053                                                                HttpRequest request, HttpContext context)
054                                                                throws HttpException {
055                                                        if (target.getHostName().equals("192.168.0.5")) {
056                                                                return null;
057                                                        }
058                                                        return super.determineProxy(target, request, context);
059                                                }
060
061                                        }).build();
062                        restTemplate.setRequestFactory(
063                                        new HttpComponentsClientHttpRequestFactory(httpClient));
064                }
065
066        }
067        // end::customizer[]
068
069}