import org.apache.http.Consts;

import org.apache.http.NameValuePair;

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

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

import org.apache.http.client.entity.UrlEncodedFormEntity;

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

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

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

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

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

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

import org.apache.http.message.BasicNameValuePair;

import org.apache.http.util.EntityUtils;

import java.io.File;

import java.io.FileOutputStream;

import java.io.IOException;

import java.util.LinkedList;

import java.util.List;

import java.util.Scanner;

public class Main {

public static void main(String[] args) {

RequestConfig requestConfig = RequestConfig.custom().setCookieSpec(CookieSpecs.STANDARD_STRICT).build();

CloseableHttpClient httpClient = HttpClients.custom().setDefaultRequestConfig(requestConfig).build();

HttpGet getHomePage = new HttpGet("http://www.zhihu.com/");

try {

//填充登陆请求中基本的参数

CloseableHttpResponse response = httpClient.execute(getHomePage);

String responseHtml = EntityUtils.toString(response.getEntity());

String xsrfValue = responseHtml.split("<input type=\"hidden\" name=\"_xsrf\" value=\"")[1].split("\"/>")[0];

System.out.println("_xsrf:" + xsrfValue);

response.close();

List<NameValuePair> valuePairs = new LinkedList<NameValuePair>();

valuePairs.add(new BasicNameValuePair("_xsrf" , xsrfValue));

valuePairs.add(new BasicNameValuePair("email", 用户名));

valuePairs.add(new BasicNameValuePair("password", 密码));

valuePairs.add(new BasicNameValuePair("rememberme", "true"));

//获取验证码

HttpGet getCaptcha = new HttpGet("http://www.zhihu.com/captcha.gif?r=" + System.currentTimeMillis() + "&type=login");

CloseableHttpResponse imageResponse = httpClient.execute(getCaptcha);

FileOutputStream out = new FileOutputStream("/tmp/zhihu.gif");

byte[] bytes = new byte[8192];

int len;

while ((len = imageResponse.getEntity().getContent().read(bytes)) != -1) {

out.write(bytes,0,len);

}

out.close();

Runtime.getRuntime().exec("eog /tmp/zhihu.gif");//ubuntu下看图片的命令是eog

//请用户输入验证码

System.out.print("请输入验证码：");

Scanner scanner = new Scanner(System.in);

String captcha = scanner.next();

valuePairs.add(new BasicNameValuePair("captcha", captcha));

//完成登陆请求的构造

UrlEncodedFormEntity entity = new UrlEncodedFormEntity(valuePairs, Consts.UTF_8);

HttpPost post = new HttpPost("http://www.zhihu.com/login/email");

post.setEntity(entity);

httpClient.execute(post);//登录

HttpGet g = new HttpGet("http://www.zhihu.com/question/following");//获取“我关注的问题”页面

CloseableHttpResponse r = httpClient.execute(g);

System.out.println(EntityUtils.toString(r.getEntity()));

r.close();

} catch (IOException e) {

e.printStackTrace();

} finally {

try {

httpClient.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

}