虾米下载链接提取

decode.js

module.exports = function (str ,num) {
  var line = Math.floor(str.length / num);
  var begin = 0;
  var end = line;
  var temp = [];
  //切割str
  for (var i = line * num - str.length; i; i++) {
    temp.push(str.slice(begin, ++end));
    begin = end;end += line;
  }
  for (var i = str.length - num - line * num; i; i++) {
    temp.push(str.slice(begin, end));
    begin = end;end += line;
  }
  
  //合并
  var result = '';
  for (var i = 0; i < line; i++) {
    for( var j = 0; j < num; j++) {
      result += temp[j][i];
    }
  }
  for (var i = 0; i < str.length - line * num; i++) {
    result += temp[i][line];
  }
  return decodeURIComponent(result).replace(/\^/g,'0');
}

index.js

var superagent = require('superagent');
var decode = require('./decode')
var url =
  'http://www.xiami.com/song/playlist/id/' +
  process.argv[2] +
  '/object_id/0/cat/json';
superagent.get().end(function(err, res){
  if (err)
    return console.error(err);
  var result = JSON.parse(res.text);
  var location = result.data.trackList[0].location;
  console.log(decode(location.slice(1), Number(location[0])));
});

package.json

{
  "name": "decode-xiami",
  "main": "index.js",
  "author": "nahakyuu <root@aroa.me>",
  "dependencies": {
    "superagent": "^1.3.0"
  }
}

蛮久之前写的了

下架的歌曲大概会导致意外错误吧