Helper file for setting up Grooveshark API sessions and making requests.

example.py

from gsapi import GSApi
api = GSApi()

username = "L1fescape"
response = api.call_remote('getUserIDFromUsername', username=username)
userID = response['result']['UserID']

response = api.call_remote('getUserPlaylistsByUserID', userID=userID)
playlists = response['result']['playlists']

print playlists

gsapi.py

HOST = 'api.grooveshark.com'
ENDPOINT = 'ws3.php'

import settings
KEY = settings.KEY
SECRET = settings.SECRET

import json
import hmac
import urllib
import urllib2

class GSApi:
    def __init__(self):
        self.session_id = None

    def set_session_id(self, sessionID):
        self.session_id = sessionID
    
    def set_debug(self, debug):
        self.debug = debug

    def create_message_sig(self, message):
        return hmac.new(SECRET, message).hexdigest()

    def call_remote(self, method, **kargs):
        api_params = {'parameters' : kargs}
        api_params['method'] = method
        api_params['header'] = { 'wsKey' : KEY }

        if self.session_id:
            api_params['header'].update({'sessionID': self.session_id})

        api_params = json.dumps(api_params)
        signature = self.create_message_sig(api_params)

        url = 'http://%s/%s?sig=%s' % (HOST, ENDPOINT, signature)
        response = urllib2.urlopen(url, api_params).read()
        response = json.loads(response)

        if not self.session_id and method == 'startSession' and 'result' in response:
            self.session_id = response['result']['sessionID']

        return response 

Credit to @sh0bin for sending this to me a few years back.