Grooveshark-scraper

An old defunct grooveshark scraper I found in my documents. Put on github so I have a record, but it no longer works. Grooveshark is offline.

Disclaimer

This code is pretty old - before i started using OOP properly, but has some nice gems inside.

Intro

So Grooveshark was a spotify competitor that closed down a couple years ago. I noticed it was leaving some very interesting tokens in javascript scope so I reverse engineered the application.

API

So it turns out the web interface ran on an internal grooveshark-API, which used various security tokens to authorise the requests. Which a mixture of single-use tokens, and an embedded security key that I found by decompiling a .swf file.

Internal Classes

• API - Handles the cURL connection and token retrieval from the website
• Cache - Misc variable storage (urgh)
• File - File manipulation - saving the downloaded .mp3 and archiving them into .zip for download
• Grooveshark - Exposed Grooveshark API, I've listed some of the more interesting calls.
  • ::getArtistSongs()
  • ::getSongFromUrl()
  • ::retrieveSong()
  • ::getPlaylist()
  • ::listPlaylists()
• Keyring - Security key storage for the current user
• Limiter - Prevents the current user from making excessive server requests.
• Log - Log usage, and provides debugging information

Keys

Grooveshark used 4 different security keys within the API, my script populated the first 3 by scraping or loading from an internal .js file.

clientRevision
clientLibrary
revToken

The final key however was within the .swf file, so i used a program called ActionscriptExtractor to decompile the .swf and update the utilities/keys.inc.php file and modify the controllerKey.

controllerKey (used to download files)

To update, use the ActionscriptExtractor.zip (as found within /assets/), and run http://grooveshark.com/JSQueue.swf. 
The required variable can be found in "(com -> grooveshark -> jsQueue -> Controller -> ~ Line 71"`