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grooveshark.py
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grooveshark.py
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import requests
import hmac
import hashlib
import json
import random
import playlist
from difflib import SequenceMatcher
class RateLimitExceeded(Exception):
pass
class WebServiceBase(object):
baseUrl = 'https://api.grooveshark.com/ws3.php'
def __init__(self, key, secret):
self.wsKey = key
self.wsSecret = secret
class Session(WebServiceBase):
def __init__(self, wsKey, wsSecret, session_id, **kwargs):
WebServiceBase.__init__(self, wsKey, wsSecret)
self.session_id = session_id
self.playlists = kwargs.get('playlists', {})
self.username = kwargs.get('username', None)
if 'password' in kwargs:
m = hashlib.md5()
m.update(password)
self.password = m.hexdigest()
else:
self.password = None
def _post(self, payload):
postData = json.dumps(payload)
h = hmac.new(self.wsSecret, postData)
r = requests.post(self.baseUrl,
data=postData,
params={'sig': h.hexdigest()})
jr = r.json()
if r.status_code != 200 or 'result' not in jr or not jr['result']:
if 'errors' in jr and 'code' in jr['errors'][0]:
if jr['errors'][0]['code'] == 11:
raise RateLimitExceeded(jr['errors'][0]['message'])
raise RuntimeError('Grooveshark Error %s: %s'
% (r.status_code, jr['errors']))
return jr
field_map = {
'song': 'SongName',
'artist': 'ArtistName',
'album': 'AlbumName',
'song_id': 'SongID',
'artist_id': 'ArtistID',
'album_id': 'AlbumID',
'popularity': 'Popularity'
}
def _search_internal(self, text, limit=3):
payload = {'method': 'getSongSearchResults',
'parameters': {'query': text,
'country': 'us',
'limit': limit},
'header': {'wsKey': self.wsKey}}
jr = self._post(payload)
hits = []
if 'result' in jr and 'songs' in jr['result']:
for i, song in enumerate(jr['result']['songs'], start=1):
if i > limit:
break
pe = playlist.PlaylistEntry()
for (attr_name, song_field) in self.field_map.iteritems():
setattr(pe, attr_name, song[song_field])
pe.label = ''
hits.append(pe)
return hits
def _close_match(self, a, b):
s = SequenceMatcher(None, a.artist.lower(), b.artist.lower())
if s.ratio() > 0.75:
match_factor = s.ratio()
s = SequenceMatcher(None, a.song.lower(), b.song.lower())
if s.ratio() > 0.75:
match_factor = match_factor + s.ratio()
s = SequenceMatcher(None, a.album.lower(), b.album.lower())
match_factor = match_factor + s.ratio()
if s.ratio() > 0.75:
match_factor = match_factor + (b.popularity/100000000000.0)
return (True, match_factor)
return (False, 0)
def _filter_matches(self, original, hits):
def is_match(hit):
(match, factor) = self._close_match(original, hit)
if match:
hit.factor = factor
return match
return filter(is_match, hits)
def _find_match(self, original, text):
hits = self._search_internal(text, 10)
matches = self._filter_matches(original, hits)
if matches and len(matches):
ranked = sorted(matches, key=lambda h: h.factor, reverse=True)
return ranked[0]
else:
return None
def search(self, playlist_entry):
text = playlist_entry.song + ' ' + playlist_entry.artist
match = self._find_match(playlist_entry, text)
if match:
return match
else:
text = playlist_entry.artist + ' ' + playlist_entry.song.split()[0]
return self._find_match(playlist_entry, text)
def start_new(self):
payload = {'method': 'startSession',
'header': {'wsKey': self.wsKey}}
jr = self._post(payload)
if 'result' in jr and 'sessionID' in jr['result']:
self.session_id = jr['result']['sessionID']
raise RuntimeError('Failed to start session: %s'
% jr['errors'])
def authenticate(self):
payload = {'method': 'authenticate',
'parameters': {'login': self.username,
'password': self.password},
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if 'result' in jr and 'success' in jr['result']:
if jr['result']['success']:
return jr['result']['UserID']
raise RuntimeError('Failed to authenticate user %s: %s'
% (self.username, jr['errors']))
def get_user_info(self):
payload = {'method': 'getUserInfo',
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if 'result' in jr and 'UserID' in jr['result']:
return jr['result']['UserID']
raise RuntimeError('Failed to get user info for %s: %s'
% (self.username, jr['errors']))
def get_playlists(self):
payload = {'method': 'getUserPlaylists',
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if 'result' in jr and 'playlists' in jr['result']:
return jr['result']['playlists']
raise RuntimeError('Failed to get playlists for %s: %s'
% (self.username, jr['errors']))
def create_playlist(self, name):
print('Creating playlist named \'%s\'..' % name)
payload = {'method': 'createPlaylist',
'parameters': {'name': name,
'songIDs': ''},
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if 'result' in jr and 'success' in jr['result']:
if jr['result']['success']:
return jr['result']['playlistID']
raise RuntimeError('Failed to create playlist %s: %s'
% (name, jr['errors']))
def add_songs_to_playlist(self, song_ids,
playlist_name=None, playlist_id=None):
if playlist_id:
print('Adding songs \'%s\' to playlist id %s..'
% (song_ids, playlist_id))
else:
if playlist_name and playlist_name in self.playlists:
playlist_id = self.playlists[playlist_name]
print('Adding songs \'%s\' to playlist named \'%s\'..'
% (song_ids, playlist_name))
else:
raise RuntimeError("Unknown playlist: " % playlist_name)
exist_songs = []
for es in self.get_songs_from_playlist(playlist_id=playlist_id):
exist_songs.append(es['SongID'])
new_songs = list(set(exist_songs + song_ids))
payload = {'method': 'setPlaylistSongs',
'parameters': {'playlistID': playlist_id,
'songIDs': new_songs},
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if ('result' in jr and 'success' in jr['result']
and jr['result']['success']):
return True
else:
return False
def add_song_to_playlist(self, song_id, playlist_name):
print('Adding song \'%s\' to playlist named \'%s\'..'
% (song_id, playlist_name))
if playlist_name not in self.playlists:
raise RuntimeError("Unknown playlist")
exist_songs = []
for es in self.get_songs_from_playlist(playlist_name):
exist_songs.append(es['SongID'])
exist_songs.append(song_id)
payload = {'method': 'setPlaylistSongs',
'parameters': {'playlistID': self.playlists[playlist_name],
'songIDs': exist_songs},
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if ('result' in jr and 'success' in jr['result']
and jr['result']['success']):
return True
else:
return False
def get_songs_from_playlist(self, playlist_name=None, playlist_id=None):
if not playlist_id:
if playlist_name and playlist_name in self.playlists:
playlist_id = self.playlists[playlist_name]
else:
raise RuntimeError("Unknown playlist: " % playlist_name)
payload = {'method': 'getPlaylist',
'parameters': {'playlistID': playlist_id,
'limit': 500},
'header': {'wsKey': self.wsKey,
'sessionID': self.session_id}}
jr = self._post(payload)
if 'result' in jr and 'Songs' in jr['result']:
return jr['result']['Songs']
raise RuntimeError('Failed to get songs from playlist %s: %s'
% (playlist_id, jr['errors']))