package org.jshand.utils.http;
import java.io.FileOutputStream;
import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.CookieStore;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.conn.PoolingClientConnectionManager;
import org.apache.http.util.EntityUtils;
/**
* TODO(用一句话描述该文件的作用)
*
* @title: HttpClientDemo.java
* @author zhangjinshan-ghq
* @date 2014-6-11 14:59:04
*/
public class HttpClientDemo
{
/**
* The main method.
*
* @param args the arguments
* @throws Exception the exception
*/
public static void main(String[] args) throws Exception
{
getResoucesByLoginCookies();
}
/**
* 根据登录Cookie获取资源
* 一切异常均未处理，需要酌情检查异常
*
* @throws Exception
*/
private static void getResoucesByLoginCookies() throws Exception
{
HttpClientDemo demo = new HttpClientDemo();
String username = "XXXXXXXXX";// 登录用户
String password = "XXXXXXXX";// 登录密码
// 需要提交登录的信息
String urlLogin = "http://www.iteye.com/login?name=" + username + "&password=" + password;
// 登录成功后想要访问的页面 可以是下载资源 需要替换成自己的iteye Blog地址
String urlAfter = "http://314649444.iteye.com/";
DefaultHttpClient client = new DefaultHttpClient(new PoolingClientConnectionManager());
/**
* 第一次请求登录页面 获得cookie
* 相当于在登录页面点击登录，此处在URL中 构造参数，
* 如果参数列表相当多的话可以使用HttpClient的方式构造参数
* 此处不赘述
*/
HttpPost post = new HttpPost(urlLogin);
HttpResponse response = client.execute(post);
HttpEntity entity = response.getEntity();
CookieStore cookieStore = client.getCookieStore();
client.setCookieStore(cookieStore);
/**
* 带着登录过的cookie请求下一个页面，可以是需要登录才能下载的url
* 此处使用的是iteye的博客首页，如果登录成功，那么首页会显示【欢迎XXXX】
*
*/
HttpGet get = new HttpGet(urlAfter);
response = client.execute(get);
entity = response.getEntity();
/**
* 将请求结果放到文件系统中保存为 myindex.html,便于使用浏览器在本地打开 查看结果
*/
String pathName = "d:\\myindex.html";
writeHTMLtoFile(entity, pathName);
}
/**
* Write htmL to file.
* 将请求结果以二进制形式放到文件系统中保存为.html文件,便于使用浏览器在本地打开 查看结果
*
* @param entity the entity
* @param pathName the path name
* @throws Exception the exception
*/
public static void writeHTMLtoFile(HttpEntity entity, String pathName) throws Exception
{
byte[] bytes = new byte[(int) entity.getContentLength()];
FileOutputStream fos = new FileOutputStream(pathName);
bytes = EntityUtils.toByteArray(entity);
fos.write(bytes);
fos.flush();
fos.close();
}
}
第二种方式：在httpclient里配置cookie的管理方式，自动管理cookie
//创建自动管理cookie的httpClient
// RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT).build();
// CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(requestConfig).build();
