页面分析

通过分析美拍播放页面的源代码，可以看到，播放页面的html代码中的有一个mate标签(property属性值为og:video:url)，该值就是页面的视频链接，只不过是经过加密后的

使用Java语言来自动获取美拍真实加密过的url地址，Crawl类

// 根据url请求html页面

public static String clawer2(String myurl) throws Exception{

URL urlmy = new URL(myurl);

HttpURLConnection con = (HttpURLConnection) urlmy.openConnection();

con.setFollowRedirects(true);

con.setInstanceFollowRedirects(false);

con.connect();

BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream(),"UTF-8"));

String s = "";

StringBuffer sb = new StringBuffer("");

while ((s = br.readLine()) != null) {

sb.append(s+"\r\n");

}

return sb.toString();

}

// 通过Jsoup包来解析html页面

public static String parsehtml(String url) throws Exception {

String htmlContent = Crawl.clawer2(url);

//使用jSoup解析里头的内容

//就像操作html doc文档对象一样操作网页中的元素

Document doc = Jsoup.parse(htmlContent);

Element span = doc.select("head > meta:nth-child(16)").first();

System.out.println(span.attr("content"));

return span.attr("content");// 获取加密后的视频url地址

}

解密加密字符串，解密后即可得到视频真实URL地址

/**

* 解密加密过的字符串

* Created by lihan on 2017/7/29.

*/

public class ParseUrl {

private Map dict1;

private Map dict2;

// 获得16进制数，该数用来分割字符串

public Map getHex(String param1){

dict1 = new HashMap();

String cstr = param1.substring(4);//str

String[] splitStr = param1.substring(0,4).split("");

String hex = "";

for (int i=3; i >= 0; i--){

hex = hex + splitStr[i];

}

dict1.put("str", cstr);

dict1.put("hex", hex);

return dict1;

}

// 获取正确的字符串,解析16进制数

public Map getDecimal(String param1){

dict2 = new HashMap();

// loc2是用来分割字符串的索引标识，转换16进制

String loc2 = String.valueOf(Integer.parseInt(param1,16));

String[] pre = loc2.substring(0,2).split("");//dict1.put("loc2", loc2.substring(0,2));

String[] tail = loc2.substring(2).split("");

dict2.put("pre", pre);

dict2.put("tail", tail);

return dict2;

}

// 分割字符串

public String substr(String param1, String[] param2) {

String loc3 = param1.substring(0, Integer.parseInt(param2[0]));//param2 = pu.getDec(pa2).get("pre")

String loc4 = param1.substring(Integer.parseInt(param2[0]), Integer.parseInt(param2[0])+Integer.parseInt(param2[1]));

return loc3 + param1.substring(Integer.parseInt(param2[0])).replace(loc4, "");

}

// 获取分割的位置

public String[] getPosition(String param1, String[] param2){

param2[0] = String.valueOf(param1.length() - Integer.parseInt(param2[0]) - Integer.parseInt(param2[1]));

return param2;

}

// 程序入口

public static void main(String[] args) throws Exception {

ParseUrl pu = new ParseUrl();

// 获取html中的加密字符串

String code = Crawl.parsehtml("http://www.meipai.com/media/816057957");

Map dict2 = pu.getHex(code);

Map dict3 = pu.getDecimal(dict2.get("hex"));

String str4 = pu.substr(dict2.get("str"), dict3.get("pre"));

BASE64Decoder base64 = new BASE64Decoder();

byte[] url = base64.decodeBuffer(pu.substr(str4, pu.getPosition(str4, dict3.get("tail"))));

// 视频真实的url地址

System.out.println(new String(url));

}

}

运行后即可得到真实的视频url

python版本可以参考：

需要安装requests库，安装命令:

pip install requests

# coding=utf-8

# Created by lihan on 2017/7/29.

import base64

import requests

from pyquery import PyQuery as pq

class Decode:

def getHex(self,param1):

return {

'str': param1[4:],

'hex': ''.join(list(param1[:4])[::-1]),

}

def getDecimal(self, param1):

loc2 = str(int(param1, 16))

print(loc2)#

return {

'pre': list(loc2[:2]),

'tail': list(loc2[2:]),

}

def substr(self, param1, param2):

loc3 = param1[0: int(param2[0])]

loc4 = param1[int(param2[0]): int(param2[0]) + int(param2[1])]

print("loc4",loc4)

return loc3 + param1[int(param2[0]):].replace(loc4, "")

def getPosition(self,param1, param2):

param2[0] = len(param1) - int(param2[0]) - int(param2[1])

return param2

def decode(self, code):

dict2 = self.getHex(code)

dict3 = self.getDecimal(dict2['hex'])

print("dict3", dict3['pre']) #

str4 = self.substr(dict2['str'], dict3['pre'])

return base64.b64decode(self.substr(str4, self.getPosition(str4, dict3['tail'])))

def crawl_video_url(self, url):

response = requests.get(url).content

d = pq(response)

code= d('meta[property="og:video:url"]').attr('content')

result = self.decode(code)

print(result)

if __name__ == '__main__':

url = "http://www.meipai.com/media/816057957"//任意播放页面的url

Decode().crawl_video_url(url)