廢話不說，直接上代碼：文末有彩蛋。
package com.huqitong.spiderdanmu;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.NumberFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.zip.InflaterInputStream;
import org.apache.http.HttpEntity;
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;
import org.apache.http.util.EntityUtils;
import com.alibaba.fastjson.JSONObject;
public class SpiderAiqiyiDanMu {
public static void main(String[] args) {
String url = "http://www.iqiyi.com/v_19rrmm2vbk.html";
List<String> res = getDanMu(url);
for (String r : res) {
System.out.println(r);
}
}
public static List<String> getDanMu(String url) {
//獲取電影或者電視劇的tvId
String res = httpGetRequest(url, false);
String REGEX = "tvId:(.+?),";
Pattern p = Pattern.compile(REGEX);
Matcher m = p.matcher(res);
String tvId = "";
if (m.find()) {
tvId = m.group(1);
} else {
return null;
}
// 根據(jù)tvId獲取電影或者電視劇的詳細信息。
String infoUrl = "http://mixer.video.iqiyi.com/jp/mixin/videos/" + tvId;
String info = httpGetRequest(infoUrl, false);
info = info.replace("var tvInfoJs=", "");
JSONObject jsonObject = JSONObject.parseObject(info);
// 電影或電視劇專輯
String albumId = jsonObject.getString("albumId");
// 電影或電視劇頻道
String channelId = jsonObject.getString("channelId");
// 電影或電視劇時長
int duration = jsonObject.getIntValue("duration");
return getDanMu(tvId, albumId, channelId, duration);
}
private static List<String> getDanMu(String tvId, String albumId, String channelId, int duration) {
// 彈幕下載地址
String IQIYI_GET_DANMU_URL = "http://cmts.iqiyi.com/bullet/%s/%s/%s_300_%s.z?rn=%s&business=danmu&is_iqiyi=true&is_video_page=true&tvid=%s&albumid=%s&categoryid=%s&qypid=01010021010000000000";
List<String> danmus = new ArrayList<String>();
// 根據(jù)電影或電視劇的時長計算出需要多少個批量彈幕請求，愛奇藝平均5分鐘請求一次加載彈幕
int page = duration / (60 * 5) + 1;
for (int i = 1; i <= page; i++) {
try {
String t = "0000" + tvId;
int length = t.length();
String first = t.substring(length - 4, length - 2);
String second = t.substring(length - 2);
String rn = "0." + randomNum(16);
String danmuUrl = String.format(IQIYI_GET_DANMU_URL, first, second, tvId, i, rn, tvId, albumId,
channelId);
String res = httpGetRequest(danmuUrl, true);
if (res != null) {
danmus.add(res);
}
} catch (Exception e) {
e.printStackTrace();
}
}
return danmus;
}
// httpClient 請求
private static String httpGetRequest(String url, boolean needUnzip) {
CloseableHttpClient httpClient = HttpClients.custom().build();
HttpGet httpGet = new HttpGet(url);
CloseableHttpResponse response = null;
try {
response = httpClient.execute(httpGet);
HttpEntity entity = response.getEntity();
if (entity != null) {
if (needUnzip) {
return new String(decompress(entity.getContent()));
}
return EntityUtils.toString(entity);
}
} catch (Exception e) {
} finally {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}
// 解壓縮字節(jié)流
private static byte[] decompress(InputStream is) {
InflaterInputStream iis = new InflaterInputStream(is);
ByteArrayOutputStream o = new ByteArrayOutputStream(1024);
try {
int i = 1024;
byte[] buf = new byte[i];
while ((i = iis.read(buf, 0, i)) > 0) {
o.write(buf, 0, i);
}
} catch (IOException e) {
e.printStackTrace();
}
return o.toByteArray();
}
// 構造隨機參數(shù)
private static String randomNum(double n) {
double s = Math.pow(10, n - 1);
double e = Math.pow(10, n) - 1;
double res = Math.random() * (e - s) + s;
NumberFormat nf = NumberFormat.getInstance();
nf.setGroupingUsed(false);
return nf.format(res);
}
}
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