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pylast.py
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pylast.py
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# -*- coding: utf-8 -*-
#
# pylast - A Python interface to Last.fm (and other API compatible social networks)
#
# Copyright 2008-2010 Amr Hassan
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# http://code.google.com/p/pylast/
__version__ = '0.5'
__author__ = 'Amr Hassan'
__copyright__ = "Copyright (C) 2008-2010 Amr Hassan"
__license__ = "apache2"
__email__ = '[email protected]'
import hashlib
from xml.dom import minidom
import xml.dom
import time
import shelve
import tempfile
import sys
import collections
import warnings
def _deprecation_warning(message):
warnings.warn(message, DeprecationWarning)
if sys.version_info[0] == 3:
from http.client import HTTPConnection
import html.entities as htmlentitydefs
from urllib.parse import splithost as url_split_host
from urllib.parse import quote_plus as url_quote_plus
unichr = chr
elif sys.version_info[0] == 2:
from httplib import HTTPConnection
import htmlentitydefs
from urllib import splithost as url_split_host
from urllib import quote_plus as url_quote_plus
STATUS_INVALID_SERVICE = 2
STATUS_INVALID_METHOD = 3
STATUS_AUTH_FAILED = 4
STATUS_INVALID_FORMAT = 5
STATUS_INVALID_PARAMS = 6
STATUS_INVALID_RESOURCE = 7
STATUS_TOKEN_ERROR = 8
STATUS_INVALID_SK = 9
STATUS_INVALID_API_KEY = 10
STATUS_OFFLINE = 11
STATUS_SUBSCRIBERS_ONLY = 12
STATUS_INVALID_SIGNATURE = 13
STATUS_TOKEN_UNAUTHORIZED = 14
STATUS_TOKEN_EXPIRED = 15
EVENT_ATTENDING = '0'
EVENT_MAYBE_ATTENDING = '1'
EVENT_NOT_ATTENDING = '2'
PERIOD_OVERALL = 'overall'
PERIOD_7DAYS = "7day"
PERIOD_3MONTHS = '3month'
PERIOD_6MONTHS = '6month'
PERIOD_12MONTHS = '12month'
DOMAIN_ENGLISH = 0
DOMAIN_GERMAN = 1
DOMAIN_SPANISH = 2
DOMAIN_FRENCH = 3
DOMAIN_ITALIAN = 4
DOMAIN_POLISH = 5
DOMAIN_PORTUGUESE = 6
DOMAIN_SWEDISH = 7
DOMAIN_TURKISH = 8
DOMAIN_RUSSIAN = 9
DOMAIN_JAPANESE = 10
DOMAIN_CHINESE = 11
COVER_SMALL = 0
COVER_MEDIUM = 1
COVER_LARGE = 2
COVER_EXTRA_LARGE = 3
COVER_MEGA = 4
IMAGES_ORDER_POPULARITY = "popularity"
IMAGES_ORDER_DATE = "dateadded"
USER_MALE = 'Male'
USER_FEMALE = 'Female'
SCROBBLE_SOURCE_USER = "P"
SCROBBLE_SOURCE_NON_PERSONALIZED_BROADCAST = "R"
SCROBBLE_SOURCE_PERSONALIZED_BROADCAST = "E"
SCROBBLE_SOURCE_LASTFM = "L"
SCROBBLE_SOURCE_UNKNOWN = "U"
SCROBBLE_MODE_PLAYED = ""
SCROBBLE_MODE_LOVED = "L"
SCROBBLE_MODE_BANNED = "B"
SCROBBLE_MODE_SKIPPED = "S"
class _Network(object):
"""
A music social network website that is Last.fm or one exposing a Last.fm compatible API
"""
def __init__(self, name, homepage, ws_server, api_key, api_secret, session_key, submission_server, username, password_hash,
domain_names, urls):
"""
name: the name of the network
homepage: the homepage url
ws_server: the url of the webservices server
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
submission_server: the url of the server to which tracks are submitted (scrobbled)
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
domain_names: a dict mapping each DOMAIN_* value to a string domain name
urls: a dict mapping types to urls
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
Either a valid session_key or a combination of username and password_hash must be present for scrobbling.
You should use a preconfigured network object through a get_*_network(...) method instead of creating an object
of this class, unless you know what you're doing.
"""
self.name = name
self.homepage = homepage
self.ws_server = ws_server
self.api_key = api_key
self.api_secret = api_secret
self.session_key = session_key
self.submission_server = submission_server
self.username = username
self.password_hash = password_hash
self.domain_names = domain_names
self.urls = urls
self.cache_backend = None
self.proxy_enabled = False
self.proxy = None
self.last_call_time = 0
#generate a session_key if necessary
if (self.api_key and self.api_secret) and not self.session_key and (self.username and self.password_hash):
sk_gen = SessionKeyGenerator(self)
self.session_key = sk_gen.get_session_key(self.username, self.password_hash)
"""def __repr__(self):
attributes = ("name", "homepage", "ws_server", "api_key", "api_secret", "session_key", "submission_server",
"username", "password_hash", "domain_names", "urls")
text = "pylast._Network(%s)"
args = []
for attr in attributes:
args.append("=".join((attr, repr(getattr(self, attr)))))
return text % ", ".join(args)
"""
def __str__(self):
return "The %s Network" %self.name
def get_artist(self, artist_name):
"""
Return an Artist object
"""
return Artist(artist_name, self)
def get_track(self, artist, title):
"""
Return a Track object
"""
return Track(artist, title, self)
def get_album(self, artist, title):
"""
Return an Album object
"""
return Album(artist, title, self)
def get_authenticated_user(self):
"""
Returns the authenticated user
"""
return AuthenticatedUser(self)
def get_country(self, country_name):
"""
Returns a country object
"""
return Country(country_name, self)
def get_group(self, name):
"""
Returns a Group object
"""
return Group(name, self)
def get_event(self, id):
"""
Returns a Event object
"""
return Event(id, self)
def get_user(self, username):
"""
Returns a user object
"""
return User(username, self)
def get_tag(self, name):
"""
Returns a tag object
"""
return Tag(name, self)
def get_scrobbler(self, client_id, client_version):
"""
Returns a Scrobbler object used for submitting tracks to the server
Quote from http://www.last.fm/api/submissions:
========
Client identifiers are used to provide a centrally managed database of
the client versions, allowing clients to be banned if they are found to
be behaving undesirably. The client ID is associated with a version
number on the server, however these are only incremented if a client is
banned and do not have to reflect the version of the actual client application.
During development, clients which have not been allocated an identifier should
use the identifier tst, with a version number of 1.0. Do not distribute code or
client implementations which use this test identifier. Do not use the identifiers
used by other clients.
=========
To obtain a new client identifier please contact:
* Last.fm: [email protected]
* # TODO: list others
...and provide us with the name of your client and its homepage address.
"""
_deprecation_warning("Use _Network.scrobble(...), _Network.scrobble_many(...), and Netowrk.update_now_playing(...) instead")
return Scrobbler(self, client_id, client_version)
def _get_language_domain(self, domain_language):
"""
Returns the mapped domain name of the network to a DOMAIN_* value
"""
if domain_language in self.domain_names:
return self.domain_names[domain_language]
def _get_url(self, domain, type):
return "http://%s/%s" %(self._get_language_domain(domain), self.urls[type])
def _get_ws_auth(self):
"""
Returns a (API_KEY, API_SECRET, SESSION_KEY) tuple.
"""
return (self.api_key, self.api_secret, self.session_key)
def _delay_call(self):
"""
Makes sure that web service calls are at least a second apart
"""
# delay time in seconds
DELAY_TIME = 1.0
now = time.time()
if (now - self.last_call_time) < DELAY_TIME:
time.sleep(1)
self.last_call_time = now
def create_new_playlist(self, title, description):
"""
Creates a playlist for the authenticated user and returns it
title: The title of the new playlist.
description: The description of the new playlist.
"""
params = {}
params['title'] = title
params['description'] = description
doc = _Request(self, 'playlist.create', params).execute(False)
e_id = doc.getElementsByTagName("id")[0].firstChild.data
user = doc.getElementsByTagName('playlists')[0].getAttribute('user')
return Playlist(user, e_id, self)
def get_top_tags(self, limit=None):
"""Returns a sequence of the most used tags as a sequence of TopItem objects."""
doc = _Request(self, "tag.getTopTags").execute(True)
seq = []
for node in doc.getElementsByTagName("tag"):
tag = Tag(_extract(node, "name"), self)
weight = _number(_extract(node, "count"))
seq.append(TopItem(tag, weight))
if limit:
seq = seq[:limit]
return seq
def enable_proxy(self, host, port):
"""Enable a default web proxy"""
self.proxy = [host, _number(port)]
self.proxy_enabled = True
def disable_proxy(self):
"""Disable using the web proxy"""
self.proxy_enabled = False
def is_proxy_enabled(self):
"""Returns True if a web proxy is enabled."""
return self.proxy_enabled
def _get_proxy(self):
"""Returns proxy details."""
return self.proxy
def enable_caching(self, file_path = None):
"""Enables caching request-wide for all cachable calls.
In choosing the backend used for caching, it will try _SqliteCacheBackend first if
the module sqlite3 is present. If not, it will fallback to _ShelfCacheBackend which uses shelve.Shelf objects.
* file_path: A file path for the backend storage file. If
None set, a temp file would probably be created, according the backend.
"""
if not file_path:
file_path = tempfile.mktemp(prefix="pylast_tmp_")
self.cache_backend = _ShelfCacheBackend(file_path)
def disable_caching(self):
"""Disables all caching features."""
self.cache_backend = None
def is_caching_enabled(self):
"""Returns True if caching is enabled."""
return not (self.cache_backend == None)
def _get_cache_backend(self):
return self.cache_backend
def search_for_album(self, album_name):
"""Searches for an album by its name. Returns a AlbumSearch object.
Use get_next_page() to retreive sequences of results."""
return AlbumSearch(album_name, self)
def search_for_artist(self, artist_name):
"""Searches of an artist by its name. Returns a ArtistSearch object.
Use get_next_page() to retreive sequences of results."""
return ArtistSearch(artist_name, self)
def search_for_tag(self, tag_name):
"""Searches of a tag by its name. Returns a TagSearch object.
Use get_next_page() to retreive sequences of results."""
return TagSearch(tag_name, self)
def search_for_track(self, artist_name, track_name):
"""Searches of a track by its name and its artist. Set artist to an empty string if not available.
Returns a TrackSearch object.
Use get_next_page() to retreive sequences of results."""
return TrackSearch(artist_name, track_name, self)
def search_for_venue(self, venue_name, country_name):
"""Searches of a venue by its name and its country. Set country_name to an empty string if not available.
Returns a VenueSearch object.
Use get_next_page() to retreive sequences of results."""
return VenueSearch(venue_name, country_name, self)
def get_track_by_mbid(self, mbid):
"""Looks up a track by its MusicBrainz ID"""
params = {"mbid": mbid}
doc = _Request(self, "track.getInfo", params).execute(True)
return Track(_extract(doc, "name", 1), _extract(doc, "name"), self)
def get_artist_by_mbid(self, mbid):
"""Loooks up an artist by its MusicBrainz ID"""
params = {"mbid": mbid}
doc = _Request(self, "artist.getInfo", params).execute(True)
return Artist(_extract(doc, "name"), self)
def get_album_by_mbid(self, mbid):
"""Looks up an album by its MusicBrainz ID"""
params = {"mbid": mbid}
doc = _Request(self, "album.getInfo", params).execute(True)
return Album(_extract(doc, "artist"), _extract(doc, "name"), self)
def update_now_playing(self, artist, title, album = None, album_artist = None,
duration = None, track_number = None, mbid = None, context = None):
"""
Used to notify Last.fm that a user has started listening to a track.
Parameters:
artist (Required) : The artist name
title (Required) : The track title
album (Optional) : The album name.
album_artist (Optional) : The album artist - if this differs from the track artist.
duration (Optional) : The length of the track in seconds.
track_number (Optional) : The track number of the track on the album.
mbid (Optional) : The MusicBrainz Track ID.
context (Optional) : Sub-client version (not public, only enabled for certain API keys)
"""
params = {"track": title, "artist": artist}
if album: params["album"] = album
if album_artist: params["albumArtist"] = album_artist
if context: params["context"] = context
if track_number: params["trackNumber"] = track_number
if mbid: params["mbid"] = mbid
if duration: params["duration"] = duration
_Request(self, "track.updateNowPlaying", params).execute()
def scrobble(self, artist, title, timestamp, album = None, album_artist = None, track_number = None,
duration = None, stream_id = None, context = None, mbid = None):
"""Used to add a track-play to a user's profile.
Parameters:
artist (Required) : The artist name.
title (Required) : The track name.
timestamp (Required) : The time the track started playing, in UNIX timestamp format (integer number of seconds since 00:00:00, January 1st 1970 UTC). This must be in the UTC time zone.
album (Optional) : The album name.
album_artist (Optional) : The album artist - if this differs from the track artist.
context (Optional) : Sub-client version (not public, only enabled for certain API keys)
stream_id (Optional) : The stream id for this track received from the radio.getPlaylist service.
track_number (Optional) : The track number of the track on the album.
mbid (Optional) : The MusicBrainz Track ID.
duration (Optional) : The length of the track in seconds.
"""
return self.scrobble_many(({"artist": artist, "title": title, "timestamp": timestamp, "album": album, "album_artist": album_artist,
"track_number": track_number, "duration": duration, "stream_id": stream_id, "context": context, "mbid": mbid},))
def scrobble_many(self, tracks):
"""
Used to scrobble a batch of tracks at once. The parameter tracks is a sequence of dicts per
track containing the keyword arguments as if passed to the scrobble() method.
"""
tracks_to_scrobble = tracks[:50]
if len(tracks) > 50:
remaining_tracks = tracks[50:]
else:
remaining_tracks = None
params = {}
for i in range(len(tracks_to_scrobble)):
params["artist[%d]" % i] = tracks_to_scrobble[i]["artist"]
params["track[%d]" % i] = tracks_to_scrobble[i]["title"]
additional_args = ("timestamp", "album", "album_artist", "context", "stream_id", "track_number", "mbid", "duration")
args_map_to = {"album_artist": "albumArtist", "track_number": "trackNumber", "stream_id": "streamID"} # so friggin lazy
for arg in additional_args:
if arg in tracks_to_scrobble[i] and tracks_to_scrobble[i][arg]:
if arg in args_map_to:
maps_to = args_map_to[arg]
else:
maps_to = arg
params["%s[%d]" %(maps_to, i)] = tracks_to_scrobble[i][arg]
_Request(self, "track.scrobble", params).execute()
if remaining_tracks:
self.scrobble_many(remaining_tracks)
class LastFMNetwork(_Network):
"""A Last.fm network object
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
Either a valid session_key or a combination of username and password_hash must be present for scrobbling.
Most read-only webservices only require an api_key and an api_secret, see about obtaining them from:
http://www.last.fm/api/account
"""
def __init__(self, api_key="", api_secret="", session_key="", username="", password_hash=""):
_Network.__init__(self,
name = "Last.fm",
homepage = "http://last.fm",
ws_server = ("ws.audioscrobbler.com", "/2.0/"),
api_key = api_key,
api_secret = api_secret,
session_key = session_key,
submission_server = "http://post.audioscrobbler.com:80/",
username = username,
password_hash = password_hash,
domain_names = {
DOMAIN_ENGLISH: 'www.last.fm',
DOMAIN_GERMAN: 'www.lastfm.de',
DOMAIN_SPANISH: 'www.lastfm.es',
DOMAIN_FRENCH: 'www.lastfm.fr',
DOMAIN_ITALIAN: 'www.lastfm.it',
DOMAIN_POLISH: 'www.lastfm.pl',
DOMAIN_PORTUGUESE: 'www.lastfm.com.br',
DOMAIN_SWEDISH: 'www.lastfm.se',
DOMAIN_TURKISH: 'www.lastfm.com.tr',
DOMAIN_RUSSIAN: 'www.lastfm.ru',
DOMAIN_JAPANESE: 'www.lastfm.jp',
DOMAIN_CHINESE: 'cn.last.fm',
},
urls = {
"album": "music/%(artist)s/%(album)s",
"artist": "music/%(artist)s",
"event": "event/%(id)s",
"country": "place/%(country_name)s",
"playlist": "user/%(user)s/library/playlists/%(appendix)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)s",
"group": "group/%(name)s",
"user": "user/%(name)s",
}
)
def __repr__(self):
return "pylast.LastFMNetwork(%s)" %(", ".join(("'%s'" %self.api_key, "'%s'" %self.api_secret, "'%s'" %self.session_key,
"'%s'" %self.username, "'%s'" %self.password_hash)))
def __str__(self):
return "LastFM Network"
def get_lastfm_network(api_key="", api_secret="", session_key = "", username = "", password_hash = ""):
"""
Returns a preconfigured _Network object for Last.fm
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
Either a valid session_key or a combination of username and password_hash must be present for scrobbling.
Most read-only webservices only require an api_key and an api_secret, see about obtaining them from:
http://www.last.fm/api/account
"""
_deprecation_warning("Create a LastFMNetwork object instead")
return LastFMNetwork(api_key, api_secret, session_key, username, password_hash)
class LibreFMNetwork(_Network):
"""
A preconfigured _Network object for Libre.fm
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
"""
def __init__(self, api_key="", api_secret="", session_key = "", username = "", password_hash = ""):
_Network.__init__(self,
name = "Libre.fm",
homepage = "http://alpha.dev.libre.fm",
ws_server = ("alpha.dev.libre.fm", "/2.0/"),
api_key = api_key,
api_secret = api_secret,
session_key = session_key,
submission_server = "http://turtle.libre.fm:80/",
username = username,
password_hash = password_hash,
domain_names = {
DOMAIN_ENGLISH: "alpha.dev.libre.fm",
DOMAIN_GERMAN: "alpha.dev.libre.fm",
DOMAIN_SPANISH: "alpha.dev.libre.fm",
DOMAIN_FRENCH: "alpha.dev.libre.fm",
DOMAIN_ITALIAN: "alpha.dev.libre.fm",
DOMAIN_POLISH: "alpha.dev.libre.fm",
DOMAIN_PORTUGUESE: "alpha.dev.libre.fm",
DOMAIN_SWEDISH: "alpha.dev.libre.fm",
DOMAIN_TURKISH: "alpha.dev.libre.fm",
DOMAIN_RUSSIAN: "alpha.dev.libre.fm",
DOMAIN_JAPANESE: "alpha.dev.libre.fm",
DOMAIN_CHINESE: "alpha.dev.libre.fm",
},
urls = {
"album": "artist/%(artist)s/album/%(album)s",
"artist": "artist/%(artist)s",
"event": "event/%(id)s",
"country": "place/%(country_name)s",
"playlist": "user/%(user)s/library/playlists/%(appendix)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)s",
"group": "group/%(name)s",
"user": "user/%(name)s",
}
)
def __repr__(self):
return "pylast.LibreFMNetwork(%s)" %(", ".join(("'%s'" %self.api_key, "'%s'" %self.api_secret, "'%s'" %self.session_key,
"'%s'" %self.username, "'%s'" %self.password_hash)))
def __str__(self):
return "Libre.fm Network"
def get_librefm_network(api_key="", api_secret="", session_key = "", username = "", password_hash = ""):
"""
Returns a preconfigured _Network object for Libre.fm
api_key: a provided API_KEY
api_secret: a provided API_SECRET
session_key: a generated session_key or None
username: a username of a valid user
password_hash: the output of pylast.md5(password) where password is the user's password
if username and password_hash were provided and not session_key, session_key will be
generated automatically when needed.
"""
_deprecation_warning("DeprecationWarning: Create a LibreFMNetwork object instead")
return LibreFMNetwork(api_key, api_secret, session_key, username, password_hash)
class _ShelfCacheBackend(object):
"""Used as a backend for caching cacheable requests."""
def __init__(self, file_path = None):
self.shelf = shelve.open(file_path)
def get_xml(self, key):
return self.shelf[key]
def set_xml(self, key, xml_string):
self.shelf[key] = xml_string
def has_key(self, key):
return key in self.shelf.keys()
class _Request(object):
"""Representing an abstract web service operation."""
def __init__(self, network, method_name, params = {}):
self.network = network
self.params = {}
for key in params:
self.params[key] = _unicode(params[key])
(self.api_key, self.api_secret, self.session_key) = network._get_ws_auth()
self.params["api_key"] = self.api_key
self.params["method"] = method_name
if network.is_caching_enabled():
self.cache = network._get_cache_backend()
if self.session_key:
self.params["sk"] = self.session_key
self.sign_it()
def sign_it(self):
"""Sign this request."""
if not "api_sig" in self.params.keys():
self.params['api_sig'] = self._get_signature()
def _get_signature(self):
"""Returns a 32-character hexadecimal md5 hash of the signature string."""
keys = list(self.params.keys())
keys.sort()
string = ""
for name in keys:
string += name
string += self.params[name]
string += self.api_secret
return md5(string)
def _get_cache_key(self):
"""The cache key is a string of concatenated sorted names and values."""
keys = list(self.params.keys())
keys.sort()
cache_key = str()
for key in keys:
if key != "api_sig" and key != "api_key" and key != "sk":
cache_key += key + _string(self.params[key])
return hashlib.sha1(cache_key).hexdigest()
def _get_cached_response(self):
"""Returns a file object of the cached response."""
if not self._is_cached():
response = self._download_response()
self.cache.set_xml(self._get_cache_key(), response)
return self.cache.get_xml(self._get_cache_key())
def _is_cached(self):
"""Returns True if the request is already in cache."""
return self.cache.has_key(self._get_cache_key())
def _download_response(self):
"""Returns a response body string from the server."""
# Delay the call if necessary
#self.network._delay_call() # enable it if you want.
data = []
for name in self.params.keys():
data.append('='.join((name, url_quote_plus(_string(self.params[name])))))
data = '&'.join(data)
headers = {
"Content-type": "application/x-www-form-urlencoded",
'Accept-Charset': 'utf-8',
'User-Agent': "pylast" + '/' + __version__
}
(HOST_NAME, HOST_SUBDIR) = self.network.ws_server
if self.network.is_proxy_enabled():
conn = HTTPConnection(host = self._get_proxy()[0], port = self._get_proxy()[1])
try:
conn.request(method='POST', url="http://" + HOST_NAME + HOST_SUBDIR,
body=data, headers=headers)
except Exception as e:
raise NetworkError(self.network, e)
else:
conn = HTTPConnection(host=HOST_NAME)
try:
conn.request(method='POST', url=HOST_SUBDIR, body=data, headers=headers)
except Exception as e:
raise NetworkError(self.network, e)
try:
response_text = _unicode(conn.getresponse().read())
except Exception as e:
raise MalformedResponseError(self.network, e)
self._check_response_for_errors(response_text)
return response_text
def execute(self, cacheable = False):
"""Returns the XML DOM response of the POST Request from the server"""
if self.network.is_caching_enabled() and cacheable:
response = self._get_cached_response()
else:
response = self._download_response()
return minidom.parseString(_string(response))
def _check_response_for_errors(self, response):
"""Checks the response for errors and raises one if any exists."""
try:
doc = minidom.parseString(_string(response))
except Exception as e:
raise MalformedResponseError(self.network, e)
e = doc.getElementsByTagName('lfm')[0]
if e.getAttribute('status') != "ok":
e = doc.getElementsByTagName('error')[0]
status = e.getAttribute('code')
details = e.firstChild.data.strip()
raise WSError(self.network, status, details)
class SessionKeyGenerator(object):
"""Methods of generating a session key:
1) Web Authentication:
a. network = get_*_network(API_KEY, API_SECRET)
b. sg = SessionKeyGenerator(network)
c. url = sg.get_web_auth_url()
d. Ask the user to open the url and authorize you, and wait for it.
e. session_key = sg.get_web_auth_session_key(url)
2) Username and Password Authentication:
a. network = get_*_network(API_KEY, API_SECRET)
b. username = raw_input("Please enter your username: ")
c. password_hash = pylast.md5(raw_input("Please enter your password: ")
d. session_key = SessionKeyGenerator(network).get_session_key(username, password_hash)
A session key's lifetime is infinie, unless the user provokes the rights of the given API Key.
If you create a Network object with just a API_KEY and API_SECRET and a username and a password_hash, a
SESSION_KEY will be automatically generated for that network and stored in it so you don't have to do this
manually, unless you want to.
"""
def __init__(self, network):
self.network = network
self.web_auth_tokens = {}
def _get_web_auth_token(self):
"""Retrieves a token from the network for web authentication.
The token then has to be authorized from getAuthURL before creating session.
"""
request = _Request(self.network, 'auth.getToken')
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
e = doc.getElementsByTagName('token')[0]
return e.firstChild.data
def get_web_auth_url(self):
"""The user must open this page, and you first, then call get_web_auth_session_key(url) after that."""
token = self._get_web_auth_token()
url = '%(homepage)s/api/auth/?api_key=%(api)s&token=%(token)s' % \
{"homepage": self.network.homepage, "api": self.network.api_key, "token": token}
self.web_auth_tokens[url] = token
return url
def get_web_auth_session_key(self, url):
"""Retrieves the session key of a web authorization process by its url."""
if url in self.web_auth_tokens.keys():
token = self.web_auth_tokens[url]
else:
token = "" #that's gonna raise a WSError of an unauthorized token when the request is executed.
request = _Request(self.network, 'auth.getSession', {'token': token})
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
return doc.getElementsByTagName('key')[0].firstChild.data
def get_session_key(self, username, password_hash):
"""Retrieve a session key with a username and a md5 hash of the user's password."""
params = {"username": username, "authToken": md5(username + password_hash)}
request = _Request(self.network, "auth.getMobileSession", params)
# default action is that a request is signed only when
# a session key is provided.
request.sign_it()
doc = request.execute()
return _extract(doc, "key")
TopItem = collections.namedtuple("TopItem", ["item", "weight"])
SimilarItem = collections.namedtuple("SimilarItem", ["item", "match"])
LibraryItem = collections.namedtuple("LibraryItem", ["item", "playcount", "tagcount"])
PlayedTrack = collections.namedtuple("PlayedTrack", ["track", "playback_date", "timestamp"])
LovedTrack = collections.namedtuple("LovedTrack", ["track", "date", "timestamp"])
ImageSizes = collections.namedtuple("ImageSizes", ["original", "large", "largesquare", "medium", "small", "extralarge"])
Image = collections.namedtuple("Image", ["title", "url", "dateadded", "format", "owner", "sizes", "votes"])
Shout = collections.namedtuple("Shout", ["body", "author", "date"])
def _string_output(funct):
def r(*args):
return _string(funct(*args))
return r
def _pad_list(given_list, desired_length, padding = None):
"""
Pads a list to be of the desired_length.
"""
while len(given_list) < desired_length:
given_list.append(padding)
return given_list
class _BaseObject(object):
"""An abstract webservices object."""
network = None
def __init__(self, network):
self.network = network
def _request(self, method_name, cacheable = False, params = None):
if not params:
params = self._get_params()
return _Request(self.network, method_name, params).execute(cacheable)
def _get_params(self):
"""Returns the most common set of parameters between all objects."""
return {}
def __hash__(self):
return hash(self.network) + \
hash(str(type(self)) + "".join(list(self._get_params().keys()) + list(self._get_params().values())).lower())
class _Taggable(object):
"""Common functions for classes with tags."""
def __init__(self, ws_prefix):
self.ws_prefix = ws_prefix
def add_tags(self, tags):
"""Adds one or several tags.
* tags: A sequence of tag names or Tag objects.
"""
for tag in tags:
self.add_tag(tag)