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__init__.py
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__init__.py
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#
# pylast -
# A Python interface to Last.fm and Libre.fm
#
# Copyright 2008-2010 Amr Hassan
# Copyright 2013-2020 hugovk
#
# 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
#
# https://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.
#
# https://github.com/pylast/pylast
import collections
import hashlib
import html.entities
import logging
import shelve
import ssl
import tempfile
import time
import warnings
import xml.dom
from http.client import HTTPSConnection
from urllib.parse import quote_plus
from xml.dom import Node, minidom
import pkg_resources
__author__ = "Amr Hassan, hugovk, Mice Pápai"
__copyright__ = "Copyright (C) 2008-2010 Amr Hassan, 2013-2020 hugovk, 2017 Mice Pápai"
__license__ = "apache2"
__email__ = "amr.hassan@gmail.com"
__version__ = pkg_resources.get_distribution(__name__).version
# 1 : This error does not exist
STATUS_INVALID_SERVICE = 2
STATUS_INVALID_METHOD = 3
STATUS_AUTH_FAILED = 4
STATUS_INVALID_FORMAT = 5
STATUS_INVALID_PARAMS = 6
STATUS_INVALID_RESOURCE = 7
# DeprecationWarning: STATUS_TOKEN_ERROR is deprecated and will be
# removed in a future version. Use STATUS_OPERATION_FAILED instead.
STATUS_OPERATION_FAILED = 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
STATUS_TEMPORARILY_UNAVAILABLE = 16
STATUS_LOGIN_REQUIRED = 17
STATUS_TRIAL_EXPIRED = 18
# 19 : This error does not exist
STATUS_NOT_ENOUGH_CONTENT = 20
STATUS_NOT_ENOUGH_MEMBERS = 21
STATUS_NOT_ENOUGH_FANS = 22
STATUS_NOT_ENOUGH_NEIGHBOURS = 23
STATUS_NO_PEAK_RADIO = 24
STATUS_RADIO_NOT_FOUND = 25
STATUS_API_KEY_SUSPENDED = 26
STATUS_DEPRECATED = 27
# 28 : This error is not documented
STATUS_RATE_LIMIT_EXCEEDED = 29
PERIOD_OVERALL = "overall"
PERIOD_7DAYS = "7day"
PERIOD_1MONTH = "1month"
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
SIZE_SMALL = 0
SIZE_MEDIUM = 1
SIZE_LARGE = 2
SIZE_EXTRA_LARGE = 3
SIZE_MEGA = 4
IMAGES_ORDER_POPULARITY = "popularity"
IMAGES_ORDER_DATE = "dateadded"
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"
# Delay time in seconds from section 4.4 of https://www.last.fm/api/tos
DELAY_TIME = 0.2
# Python >3.4 has sane defaults
SSL_CONTEXT = ssl.create_default_context()
logger = logging.getLogger(__name__)
logging.getLogger(__name__).addHandler(logging.NullHandler())
class _Network:
"""
A music social network website such as Last.fm or
one with a Last.fm-compatible API.
"""
def __init__(
self,
name,
homepage,
ws_server,
api_key,
api_secret,
session_key,
username,
password_hash,
domain_names,
urls,
token=None,
):
"""
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
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
token: an authentication token to retrieve a session
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.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
self.limit_rate = False
# Load session_key and username from authentication token if provided
if token and not self.session_key:
sk_gen = SessionKeyGenerator(self)
self.session_key, self.username = sk_gen.get_web_auth_session_key_username(
url=None, token=token
)
# 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 __str__(self):
return "%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_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_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, url_type):
return "https://{}/{}".format(
self._get_language_domain(domain), self.urls[url_type]
)
def _get_ws_auth(self):
"""
Returns an (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 0.2 seconds apart.
"""
now = time.time()
time_since_last = now - self.last_call_time
if time_since_last < DELAY_TIME:
time.sleep(DELAY_TIME - time_since_last)
self.last_call_time = now
def get_top_artists(self, limit=None, cacheable=True):
"""Returns the most played artists as a sequence of TopItem objects."""
params = {}
if limit:
params["limit"] = limit
doc = _Request(self, "chart.getTopArtists", params).execute(cacheable)
return _extract_top_artists(doc, self)
def get_top_tracks(self, limit=None, cacheable=True):
"""Returns the most played tracks as a sequence of TopItem objects."""
params = {}
if limit:
params["limit"] = limit
doc = _Request(self, "chart.getTopTracks", params).execute(cacheable)
seq = []
for node in doc.getElementsByTagName("track"):
title = _extract(node, "name")
artist = _extract(node, "name", 1)
track = Track(artist, title, self)
weight = _number(_extract(node, "playcount"))
seq.append(TopItem(track, weight))
return seq
def get_top_tags(self, limit=None, cacheable=True):
"""Returns the most used tags as a sequence of TopItem objects."""
# Last.fm has no "limit" parameter for tag.getTopTags
# so we need to get all (250) and then limit locally
doc = _Request(self, "tag.getTopTags").execute(cacheable)
seq = []
for node in doc.getElementsByTagName("tag"):
if limit and len(seq) >= limit:
break
tag = Tag(_extract(node, "name"), self)
weight = _number(_extract(node, "count"))
seq.append(TopItem(tag, weight))
return seq
def get_geo_top_artists(self, country, limit=None, cacheable=True):
"""Get the most popular artists on Last.fm by country.
Parameters:
country (Required) : A country name, as defined by the ISO 3166-1
country names standard.
limit (Optional) : The number of results to fetch per page.
Defaults to 50.
"""
params = {"country": country}
if limit:
params["limit"] = limit
doc = _Request(self, "geo.getTopArtists", params).execute(cacheable)
return _extract_top_artists(doc, self)
def get_geo_top_tracks(self, country, location=None, limit=None, cacheable=True):
"""Get the most popular tracks on Last.fm last week by country.
Parameters:
country (Required) : A country name, as defined by the ISO 3166-1
country names standard
location (Optional) : A metro name, to fetch the charts for
(must be within the country specified)
limit (Optional) : The number of results to fetch per page.
Defaults to 50.
"""
params = {"country": country}
if location:
params["location"] = location
if limit:
params["limit"] = limit
doc = _Request(self, "geo.getTopTracks", params).execute(cacheable)
tracks = doc.getElementsByTagName("track")
seq = []
for track in tracks:
title = _extract(track, "name")
artist = _extract(track, "name", 1)
listeners = _extract(track, "listeners")
seq.append(TopItem(Track(artist, title, self), listeners))
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_rate_limit(self):
"""Enables rate limiting for this network"""
self.limit_rate = True
def disable_rate_limit(self):
"""Disables rate limiting for this network"""
self.limit_rate = False
def is_rate_limited(self):
"""Return True if web service calls are rate limited"""
return self.limit_rate
def enable_caching(self, file_path=None):
"""Enables caching request-wide for all cacheable calls.
* 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 is 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 retrieve 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 retrieve sequences of results."""
return ArtistSearch(artist_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 retrieve sequences of results."""
return TrackSearch(artist_name, track_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):
"""Looks 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 = { # so friggin lazy
"album_artist": "albumArtist",
"track_number": "trackNumber",
"stream_id": "streamID",
}
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:
https://www.last.fm/api/account
"""
def __init__(
self,
api_key="",
api_secret="",
session_key="",
username="",
password_hash="",
token="",
):
_Network.__init__(
self,
name="Last.fm",
homepage="https://www.last.fm",
ws_server=("ws.audioscrobbler.com", "/2.0/"),
api_key=api_key,
api_secret=api_secret,
session_key=session_key,
username=username,
password_hash=password_hash,
token=token,
domain_names={
DOMAIN_ENGLISH: "www.last.fm",
DOMAIN_GERMAN: "www.last.fm/de",
DOMAIN_SPANISH: "www.last.fm/es",
DOMAIN_FRENCH: "www.last.fm/fr",
DOMAIN_ITALIAN: "www.last.fm/it",
DOMAIN_POLISH: "www.last.fm/pl",
DOMAIN_PORTUGUESE: "www.last.fm/pt",
DOMAIN_SWEDISH: "www.last.fm/sv",
DOMAIN_TURKISH: "www.last.fm/tr",
DOMAIN_RUSSIAN: "www.last.fm/ru",
DOMAIN_JAPANESE: "www.last.fm/ja",
DOMAIN_CHINESE: "www.last.fm/zh",
},
urls={
"album": "music/%(artist)s/%(album)s",
"artist": "music/%(artist)s",
"country": "place/%(country_name)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)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,
)
)
)
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="https://libre.fm",
ws_server=("libre.fm", "/2.0/"),
api_key=api_key,
api_secret=api_secret,
session_key=session_key,
username=username,
password_hash=password_hash,
domain_names={
DOMAIN_ENGLISH: "libre.fm",
DOMAIN_GERMAN: "libre.fm",
DOMAIN_SPANISH: "libre.fm",
DOMAIN_FRENCH: "libre.fm",
DOMAIN_ITALIAN: "libre.fm",
DOMAIN_POLISH: "libre.fm",
DOMAIN_PORTUGUESE: "libre.fm",
DOMAIN_SWEDISH: "libre.fm",
DOMAIN_TURKISH: "libre.fm",
DOMAIN_RUSSIAN: "libre.fm",
DOMAIN_JAPANESE: "libre.fm",
DOMAIN_CHINESE: "libre.fm",
},
urls={
"album": "artist/%(artist)s/album/%(album)s",
"artist": "artist/%(artist)s",
"country": "place/%(country_name)s",
"tag": "tag/%(name)s",
"track": "music/%(artist)s/_/%(title)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,
)
)
)
class _ShelfCacheBackend:
"""Used as a backend for caching cacheable requests."""
def __init__(self, file_path=None):
self.shelf = shelve.open(file_path)
self.cache_keys = set(self.shelf.keys())
def __contains__(self, key):
return key in self.cache_keys
def __iter__(self):
return iter(self.shelf.keys())
def get_xml(self, key):
return self.shelf[key]
def set_xml(self, key, xml_string):
self.cache_keys.add(key)
self.shelf[key] = xml_string
class _Request:
"""Representing an abstract web service operation."""
def __init__(self, network, method_name, params=None):
logger.debug(method_name)
if params is None:
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 "api_sig" not 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 = ""
for key in keys:
if key != "api_sig" and key != "api_key" and key != "sk":
cache_key += key + self.params[key]
return hashlib.sha1(cache_key.encode("utf-8")).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._get_cache_key() in self.cache
def _download_response(self):
"""Returns a response body string from the server."""
if self.network.limit_rate:
self.network._delay_call()
data = []
for name in self.params.keys():
data.append("=".join((name, 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 = HTTPSConnection(
context=SSL_CONTEXT,
host=self.network._get_proxy()[0],
port=self.network._get_proxy()[1],
)
try:
conn.request(
method="POST",
url="https://" + host_name + host_subdir,
body=data,
headers=headers,
)
except Exception as e:
raise NetworkError(self.network, e)
else:
conn = HTTPSConnection(context=SSL_CONTEXT, 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 = conn.getresponse()
if response.status in [500, 502, 503, 504]:
raise WSError(
self.network,
response.status,
"Connection to the API failed with HTTP code "
+ str(response.status),
)
response_text = _unicode(response.read())
except Exception as e:
raise MalformedResponseError(self.network, e)
try:
self._check_response_for_errors(response_text)
finally:
conn.close()
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).replace("opensearch:", ""))
def _check_response_for_errors(self, response):
"""Checks the response for errors and raises one if any exists."""
try:
doc = minidom.parseString(_string(response).replace("opensearch:", ""))
except Exception as e:
raise MalformedResponseError(self.network, e)
e = doc.getElementsByTagName("lfm")[0]
# logger.debug(doc.toprettyxml())
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:
"""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 infinite, unless the user revokes 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