舞曲库音乐文件下载

访问试听页面，由于使用了windows media player插件，所以一定能够拿到音频文件的播放地址，就看对方隐藏的巧妙程度了。。。

1.音频文件页面http://wuquku.com/music-play-9923.html，看了一下没有将地址存放在html页面中；

2.继续找，找到是通过Ajax形式进行加载，9923是音乐id；

3.发送ajax请求获取音频文件地址：http://wuquku.com/template/music/ajax.php?action=geturl&t=p&id=9923

返回音频文件的地址 

http%3A%2F%2Fwuqukumms.wuquku.com%2F%u4ea4%u8c0a%u821e%u66f2%2F%u5e7f%u573a%u821e%2F20110003%2F%7B%u5e7f%u573a%u96c6%u4f53%u821e%u66f2%7D%u547d%u8fd0%u4e0d%u662f%u8f98%u8f73%28ok%u771f%u5fc3%u4e0a%u4f20%29wuquku%u53d1%u5e03.mp3

 注意：HTTP GET请求中必须有Referer选项，且必须是wuquku域名下，否则Ajax请求返回空；

4.对url地址进行unescape，可以直接用js的unescape方法获取地址，也可以用一下的java代码的uncaspe函数进行转义

class EscapeUnescape {public static String escape(String src) {int i;char j;StringBuffer tmp = new StringBuffer();tmp.ensureCapacity(src.length() * 6);for (i = 0; i < src.length(); i++) {j = src.charAt(i);if (Character.isDigit(j) || Character.isLowerCase(j) || Character.isUpperCase(j))tmp.append(j);else if (j < 256) {tmp.append("%");if (j < 16)tmp.append("0");tmp.append(Integer.toString(j, 16));} else {tmp.append("%u");tmp.append(Integer.toString(j, 16));}}return tmp.toString();}public static String unescape(String src) {StringBuffer tmp = new StringBuffer();tmp.ensureCapacity(src.length());int lastPos = 0, pos = 0;char ch;while (lastPos < src.length()) {pos = src.indexOf("%", lastPos);if (pos == lastPos) {if (src.charAt(pos + 1) == 'u') {ch = (char) Integer.parseInt(src.substring(pos + 2, pos + 6), 16);tmp.append(ch);lastPos = pos + 6;} else {ch = (char) Integer.parseInt(src.substring(pos + 1, pos + 3), 16);tmp.append(ch);lastPos = pos + 3;}} else {if (pos == -1) {tmp.append(src.substring(lastPos));lastPos = src.length();} else {tmp.append(src.substring(lastPos, pos));lastPos = pos;}}}return tmp.toString();}public static void main(String[] args) {String tmp = "~!@#$%^&*()_+|\\=-,./?><;'][{}\"";System.out.println("testing escape : " + tmp);tmp = escape(tmp);System.out.println(tmp);System.out.println("testing unescape :" + tmp);System.out.println(unescape(tmp));}
}