我来模仿iTeye登录(HttpClient)

1.利用HttpClient模拟iteye登录

package com.home.action.test.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.net.CookieHandler;
import java.net.CookieManager;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
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.message.BasicNameValuePair;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

/**
 * 模仿登录iTeye
 * @author Li
 */
public class LoginITEye {
    private String cookies;
    private HttpClient http = new DefaultHttpClient();
    private final String USER_AGENT = "Mozilla/5.0";
    
    public static void main(String[] args) throws Exception {
        String url = "http://www.iteye.com/login";
        String itUrl = "http://www.iteye.com";
        LoginITEye iteye = new LoginITEye();
        
        //打开cookie
        CookieHandler.setDefault(new CookieManager());
        
        //获取请求登录的页面HTML
        String page = iteye.getITEyePageContent(url);
        System.out.println(page);
        
        //设置登录参数
        List<NameValuePair> params = iteye.tranParams(page, "email","password");
        
        //开始登录
        iteye.startLogin(url, params);
        
        String itEyePage = iteye.getITEyePageContent(itUrl);
        System.out.println("----------可以从itEyePage打印里面看到welcome欢迎***。表示登录成功.-----------");
        System.out.println(itEyePage);
    }
    
    /**
     * 开始模拟登录
     * @param url
     * @param params
     * @throws IOException 
     * @throws ClientProtocolException 
     */
    private void startLogin(String url, List<NameValuePair> params) throws Exception {
        HttpPost request = new HttpPost(url);
        
        request.setHeader("Host", "www.iteye.com");
        request.setHeader("User-Agent", USER_AGENT);
        
        request.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        request.setHeader("Accept-Language", "zh-CN,zh;q=0.8,en-GB;q=0.6,en;q=0.4,zh-TW;q=0.2");
        
        request.setHeader("Cookie", getCookies());
        request.setHeader("Connection", "keep-alive");
        
        request.setHeader("Referer", "http://www.iteye.com/login");
        request.setHeader("Content-Type", "application/x-www-form-urlencoded");
        
        request.setEntity(new UrlEncodedFormEntity(params));
        
        HttpResponse response = http.execute(request);
        int statusCode = response.getStatusLine().getStatusCode();
        
        //statusCode==200表示请求成功.
        System.out.println("\nSending 'POST' request to URL : " + url);
        System.out.println("send paramer: "+ params);
        System.out.println("Response Code : " + statusCode);
        
        BufferedReader br = new BufferedReader(
                    new InputStreamReader(response.getEntity().getContent()));
        
        StringBuffer sb = new StringBuffer();
        String line = "";
        while((line = br.readLine()) != null) {
            sb.append(line);
        }
        
        //System.out.println(sb.toString());
    }
    
    /**
     * 把你的登录账号和密码设置到form里面去
     * @param html
     * @param name 你的iTeye登录名
     * @param word 你的iTeye登录密码
     * @return
     */
    private List<NameValuePair> tranParams(String html, String name, String word) {
        List<NameValuePair> list = new ArrayList<NameValuePair>();
        
        //转化HTML --> document
        Document doc = Jsoup.parse(html);
        
        //获取ITEye登录form
        Element formEl = doc.getElementById("login_form");
        Elements inputs = formEl.getElementsByTag("input");
        
        //解析ITEye登录form里面的登录名和登录密码
        for(Element el: inputs) {
            String elName = el.attr("name");
            String elValue = el.attr("value");
            
            if(elName.equals("name")) {
                elValue = name;
            }else if(elName.equals("password")) {
                elValue = word;
            }
            
            if(!elName.equals("button")) {
                list.add(new BasicNameValuePair(elName, elValue));
            }
        }
        return list;
    }
    
    /**
     * 获取iTeye登录页面
     * @param url
     * @return
     * @throws IOException 
     * @throws ClientProtocolException 
     */
    private String getITEyePageContent(String url) throws Exception {
        StringBuffer result = new StringBuffer();
        
        //设置请求信息
        HttpGet request = new HttpGet(url);
        request.setHeader("User-Agent", USER_AGENT);
        request.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8");
        request.setHeader("Accept-Language", "zh-CN,zh;q=0.8,en-GB;q=0.6,en;q=0.4,zh-TW;q=0.2");
        
        //发送请求
        HttpResponse response = http.execute(request);
        int statusCode = response.getStatusLine().getStatusCode();
        
        //statusCode==200表示请求成功.
        System.out.println("\nSending 'GET' request to URL : " + url);
        System.out.println("Response Code : " + statusCode);
        
        //读取返回内容解析成字符串
        BufferedReader br = new BufferedReader(
                        new InputStreamReader(response.getEntity().getContent()));
        
        String line = "";
        while((line = br.readLine()) != null) {
            result.append(line);
        }
        
        //设置cookie
        setCookies(response.getFirstHeader("Set-Cookie") == null ? "":
                                response.getFirstHeader("Set-Cookie").toString());
        return result.toString();
    }

    /**
     * @return the cookid
     */
    public String getCookies() {
        return cookies;
    }

    /**
     * @param cookid the cookid to set
     */
    public void setCookies(String cookies) {
        this.cookies = cookies;
    }

}

评论

1 楼 Neoman 2013-07-30  

似乎好像不对啊，我测试登录成功返回的是 302