Java爬取並下載酷狗TOP500歌曲

Java團長_發表於2019-01-03
Java

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來源：my.oschina.net/gllfeixiang/blog/2995570?p=1

是這樣的，之前買車送的垃圾記錄儀不能用了，這兩天狠心買了好點的記錄儀，帶導航、音樂、藍芽、4G等功能，尋思，既然有這些功能就利用起來，用4G聽歌有點奢侈，就準備去酷狗下點歌聽，居然都是需要辦會員才能下載，而且vip一月只能下載300首，我這麼窮又這麼摳怎麼可能衝會員，於是百度搜了下怎麼免費下載，都是python爬取，雖然也會一點，但是電腦上沒安裝python，再安裝再研究感覺有點費勁，於是就花了半小時做了這個爬蟲，技術一般，只記錄分析實現過程，大牛請繞行。其中用到了一些庫，包括：jsoup、HttpClient、net.sf.json大家可以自行去下載jar包。

1、分析是否能獲得TOP500歌單

首先，開啟酷狗首頁檢視酷狗TOP500，說好的500首，怎麼就只有22首呢？

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是真的只讓看這些還是能找到其餘的呢，於是我就看了下這TOP500的連結：

https://www.kugou.com/yy/rank/home/1-8888.html?from=rank

可以看的出home後邊有個1，難道這是代表第一頁的意思？於是我就把1改成2，進入，果然進入了第二頁， 至此可以知道我們可以在網頁裡獲取這500首的歌單。

2、分析找到真正的mp3下載地址（這個有點繞）

點一個歌曲進入播放頁面，使用谷歌瀏覽器的控制檯的Elements，搜一下mp3，很輕鬆就定位到了MP3的位置。

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但是使用java訪問的時候爬取的html裡卻沒有該mp3的檔案地址，那麼這肯定是在該頁面的位置使用了js來載入mp3，那麼重新整理下網頁，看網頁載入了哪些東西，載入的東西有點多，著重看一下js、php的請求，主要是看裡面有沒有mp3的地址，分析細節就不用說了。

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最終我在列表的

https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jQuery191027067069941080546_1546235744250&hash=667939C6E784265D541DEEE65AE4F2F8&album_id=0&_=1546235744251


這個請求裡發現了mp3的完整地址：


"play_url": "http:\/\/fs.w.kugou.com\/201812311325\/dcf5b6449160903c6ee48035e11434bb\/G128\/M08\/02\/09\/IIcBAFrZqf2ANOadADn94ubOmaU995.mp3",


那這個js是怎麼判斷是哪首歌的呢，那麼只可能是hash這個引數來決定歌曲的，然後到播放頁面裡找到這個hash的位置，是在下面的js裡：


var dataFromSmarty = [{"hash":"667939C6E784265D541DEEE65AE4F2F8","timelength":"237051","audio_name":"\u767d\u5c0f\u767d - \u6700\u7f8e\u5a5a\u793c","author_name":"\u767d\u5c0f\u767d","song_name":"\u6700\u7f8e\u5a5a\u793c","album_id":0}],//當前頁面歌曲資訊
            playType = "search_single";//當前播放
    </script>


在去java爬取該網頁，檢視能否爬到這個hash，果然，爬取的html裡有這段js，到現在mp3的地址也找到了，歌單也找到了，那麼下一步就用程式實現就可以了。

3、java實現爬取酷狗mp3

先看一下爬取結果：

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找到了資源，程式實現就好說了，其中使用到了自己寫的幾個工具類，自己整理點自己的工具類還是有好處的，以後遇到什麼問題就沒必要重新寫了，直接拿來用就可以了。沒什麼好說的了，下面直接貼出原始碼。

SpiderKugou.java

package com.bing.spider;

import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import com.bing.download.FileDownload;
import com.bing.html.HtmlManage;
import com.bing.http.HttpGetConnect;

import net.sf.json.JSONObject;

public class SpiderKugou {

  public static String filePath = "F:/music/";
  public static String mp3 = "https://wwwapi.kugou.com/yy/index.php?r=play/getdata&callback=jQuery191027067069941080546_1546235744250&"
      + "hash=HASH&album_id=0&_=TIME";
  
  public static String LINK = "https://www.kugou.com/yy/rank/home/PAGE-8888.html?from=rank";
  //"https://www.kugou.com/yy/rank/home/PAGE-23784.html?from=rank";
  
  
  public static void main(String[] args) throws IOException {
    
    for(int i = 1 ; i < 23 ; i++){
      String url = LINK.replace("PAGE", i + "");
      getTitle(url);
      //download("https://www.kugou.com/song/mfy6je5.html");
    }
  }
  
  public static String getTitle(String url) throws IOException{
    HttpGetConnect connect = new HttpGetConnect();
    String content = connect.connect(url, "utf-8");
    HtmlManage html = new HtmlManage();
    Document doc = html.manage(content);
    Element ele = doc.getElementsByClass("pc_temp_songlist").get(0);
    Elements eles = ele.getElementsByTag("li");
    for(int i = 0 ; i < eles.size() ; i++){
      Element item = eles.get(i);
      String title = item.attr("title").trim();
      String link = item.getElementsByTag("a").first().attr("href");
      
      download(link,title);
    }
    return null;
  }
  
  public static String download(String url,String name) throws IOException{
    String hash = "";
    HttpGetConnect connect = new HttpGetConnect();
    String content = connect.connect(url, "utf-8");
    HtmlManage html = new HtmlManage();
    
    String regEx = "\"hash\":\"[0-9A-Z]+\"";
    // 編譯正規表示式
    Pattern pattern = Pattern.compile(regEx);
    Matcher matcher = pattern.matcher(content);
    if (matcher.find()) {
      hash = matcher.group();
      hash = hash.replace("\"hash\":\"", "");
      hash = hash.replace("\"", "");
    }
    
    String item = mp3.replace("HASH", hash);
    item = item.replace("TIME", System.currentTimeMillis() + "");

    System.out.println(item);
    String mp = connect.connect(item, "utf-8");
    
    mp = mp.substring(mp.indexOf("(") + 1, mp.length() - 3);
    
    JSONObject json = JSONObject.fromObject(mp);
    String playUrl = json.getJSONObject("data").getString("play_url");
    

    System.out.print(playUrl + "  ==  ");
    FileDownload down = new FileDownload();
    down.download(playUrl, filePath + name + ".mp3");
    
    System.out.println(name + "下載完成");
    return playUrl;
  }

}


HttpGetConnect.java


package com.bing.http;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.security.NoSuchAlgorithmException;
import java.security.cert.CertificateException;
import java.security.cert.X509Certificate;

import javax.net.ssl.SSLContext;
import javax.net.ssl.TrustManager;
import javax.net.ssl.X509TrustManager;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.apache.http.HttpEntity;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.ResponseHandler;
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.conn.ClientConnectionManager;
import org.apache.http.conn.scheme.Scheme;
import org.apache.http.conn.scheme.SchemeRegistry;
import org.apache.http.conn.ssl.SSLSocketFactory;
import org.apache.http.impl.client.BasicResponseHandler;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.impl.conn.BasicHttpClientConnectionManager;
import org.apache.http.params.HttpParams; 
/**
 * @說明：
 * @author: gaoll
 * @CreateTime:2014-11-13
 * @ModifyTime:2014-11-13
 */
public class HttpGetConnect {
  
  /**
   *  獲取html內容
   * @param url
   * @param charsetName  UTF-8、GB2312
   * @return
   * @throws IOException
   */
  public static String connect(String url,String charsetName) throws IOException{
    BasicHttpClientConnectionManager connManager = new BasicHttpClientConnectionManager();
    
    CloseableHttpClient httpclient = HttpClients.custom()
              .setConnectionManager(connManager)
              .build();
    String content = "";
    
    try{
      HttpGet httpget = new HttpGet(url);
      
      RequestConfig requestConfig = RequestConfig.custom()
                  .setSocketTimeout(5000)
                  .setConnectTimeout(50000)
                  .setConnectionRequestTimeout(50000)
                  .build();
          httpget.setConfig(requestConfig);
          httpget.setHeader("Accept", "text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,*/*;q=0.8");
          httpget.setHeader("Accept-Encoding", "gzip,deflate,sdch");
          httpget.setHeader("Accept-Language", "zh-CN,zh;q=0.8");
          httpget.setHeader("Connection", "keep-alive");
          httpget.setHeader("Upgrade-Insecure-Requests", "1");
          httpget.setHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/45.0.2454.101 Safari/537.36");
          //httpget.setHeader("Hosts", "www.oschina.net");
          httpget.setHeader("cache-control", "max-age=0");  
        
      CloseableHttpResponse response = httpclient.execute(httpget);
      
      int status = response.getStatusLine().getStatusCode();
            if (status >= 200 && status < 300) {
              
                HttpEntity entity = response.getEntity();
                InputStream instream = entity.getContent();
                BufferedReader br = new BufferedReader(new InputStreamReader(instream,charsetName));
        StringBuffer sbf = new StringBuffer();
        String line = null;
        while ((line = br.readLine()) != null){
          sbf.append(line + "\n");
        }

        br.close();
        content = sbf.toString();
            } else {
                content = "";
            }
      
    }catch(Exception e){
      e.printStackTrace();
    }finally{
      httpclient.close();
    }
    //log.info("content is " + content);
    return content;
  }
  private static Log log = LogFactory.getLog(HttpGetConnect.class);
}


HtmlManage.java


package com.bing.html;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.jsoup.Jsoup;
import org.jsoup.nodes.Document;
import org.jsoup.nodes.Element;
import org.jsoup.select.Elements;

import com.bing.http.HttpGetConnect;

/**
 * @說明：
 * @author: gaoll
 * @CreateTime:2014-11-13
 * @ModifyTime:2014-11-13
 */
public class HtmlManage {
  
  public Document manage(String html){
    Document doc = Jsoup.parse(html);
    return doc;
  }
  
  public Document manageDirect(String url) throws IOException{
    Document doc = Jsoup.connect( url ).get();
    return doc;
  }
  
  public List<String> manageHtmlTag(Document doc,String tag ){
    List<String> list = new ArrayList<String>();
    
    Elements elements = doc.getElementsByTag(tag);
    for(int i = 0; i < elements.size() ; i++){
      String str = elements.get(i).html();
      list.add(str);
    }
    return list;
  }
  
  public List<String> manageHtmlClass(Document doc,String clas ){
    List<String> list = new ArrayList<String>();
    
    Elements elements = doc.getElementsByClass(clas);
    for(int i = 0; i < elements.size() ; i++){
      String str = elements.get(i).html();
      list.add(str);
    }
    return list;
  }
  
  public List<String> manageHtmlKey(Document doc,String key,String value ){
    List<String> list = new ArrayList<String>();
    
    Elements elements = doc.getElementsByAttributeValue(key, value);
    for(int i = 0; i < elements.size() ; i++){
      String str = elements.get(i).html();
      list.add(str);
    }
    return list;
  }
  
  private static Log log = LogFactory.getLog(HtmlManage.class);
}


FileDownload.java


package com.bing.download;

import java.io.BufferedInputStream;
import java.io.BufferedOutputStream;
import java.io.File;
import java.io.FileOutputStream;

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
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.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;

/**
 * @說明：
 * @author: gaoll
 * @CreateTime:2014-11-20
 * @ModifyTime:2014-11-20
 */
public class FileDownload {
  
  /**
   * 檔案下載
   * @param url 連結地址
   * @param path 要儲存的路徑及檔名
   * @return
   */
  public static boolean download(String url,String path){
    
    boolean flag = false;
    
    CloseableHttpClient httpclient = HttpClients.createDefault();
    RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000)
        .setConnectTimeout(2000).build();

    HttpGet get = new HttpGet(url);
    get.setConfig(requestConfig);
    
    BufferedInputStream in = null;
    BufferedOutputStream out = null;
    try{
      for(int i=0;i<3;i++){
        CloseableHttpResponse result = httpclient.execute(get);
        System.out.println(result.getStatusLine());
        if(result.getStatusLine().getStatusCode() == 200){
          in = new BufferedInputStream(result.getEntity().getContent());
          File file = new File(path);
          out = new BufferedOutputStream(new FileOutputStream(file));
          byte[] buffer = new byte[1024];
          int len = -1;
          while((len = in.read(buffer,0,1024)) > -1){
            out.write(buffer,0,len);
          }
          flag = true;
          break;
        }else if(result.getStatusLine().getStatusCode() == 500){
          continue ;
        }
      }
      
    }catch(Exception e){
      e.printStackTrace();
      flag = false;
    }finally{
      get.releaseConnection();
      try{
        if(in != null){
          in.close();
        }
        if(out != null){
          out.close();
        }
      }catch(Exception e){
        e.printStackTrace();
        flag = false;
      }
    }
    return flag;
  }

  private static Log log = LogFactory.getLog(FileDownload.class);
}


到這就結束了，有可能有些程式碼沒貼全，主要程式碼已經差不多，應該可以跑起來，多多指教。


PS：如果覺得團長的分享不錯，歡迎大家隨手點“好看”、轉發。

（完）


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