import java.net.URI;

import java.util.List;

import org.apache.http.HttpEntity;

import org.apache.http.HttpHost;

import org.apache.http.client.config.RequestConfig;

import org.apache.http.client.methods.CloseableHttpResponse;

import org.apache.http.client.methods.HttpGet;

import org.apache.http.client.methods.HttpUriRequest;

import org.apache.http.client.methods.RequestBuilder;

import org.apache.http.cookie.Cookie;

import org.apache.http.impl.client.BasicCookieStore;

import org.apache.http.impl.client.CloseableHttpClient;

import org.apache.http.impl.client.HttpClients;

import org.apache.http.util.EntityUtils;

public class Http {

    // 如何通过一个代理发送一个HTTP请求。

    public void action1() throws Exception {

        CloseableHttpClient httpclient = HttpClients.createDefault();

        try {

            HttpHost target = new HttpHost("ip1", 8080, "https");

            HttpHost proxy = new HttpHost("ip2", 8080, "http");

            RequestConfig config = RequestConfig.custom().setProxy(proxy).build();

            HttpGet request = new HttpGet("/");

            request.setConfig(config);

            System.out.println("Executing request " + request.getRequestLine()

                    + " to " + target + " via " + proxy);

            httpclient.execute(target, request);

        } finally {

            httpclient.close();

        }

    }

    // 得到cookies。

    public void action2() throws Exception {

        BasicCookieStore cookieStore = new BasicCookieStore();

        CloseableHttpClient httpclient = HttpClients.custom()

                .setDefaultCookieStore(cookieStore).build();

         try {

//                HttpGet httpget = new HttpGet("https://someportal/?username=username&password=password");

//                CloseableHttpResponse response = httpclient.execute(httpget);

                HttpUriRequest login = RequestBuilder.post()

                    .setUri(new URI("https://www.baidu.com/"))

                    .addParameter("username", "username")

                    .addParameter("password", "password").build();

                httpclient.execute(login);

                System.out.println("请求所得的 cookies:");

                List<Cookie> cookies = cookieStore.getCookies();

                if (cookies.isEmpty()) {

                    System.out.println("None");

                } else {

                    for (int i = 0; i < cookies.size(); i++) {

                        System.out.println("- " + cookies.get(i).toString());

                    }

                }

        } finally {

            httpclient.close();

        }

    }

    // 设置超时。

        public void action3() throws Exception {

            CloseableHttpClient httpclient = HttpClients.createDefault();

            RequestConfig requestConfig = RequestConfig.custom()

                    .setSocketTimeout(1000)

                    .setConnectTimeout(1000)

                    .build();

            HttpGet httpget1 = new HttpGet("https://www.baidu.com");

            httpget1.setConfig(requestConfig);

            httpclient.execute(httpget1);

        }

}