Napster stream API used in android app (no drm)

napsterdl.py

import requests
from requests.auth import HTTPBasicAuth
import json
from pathlib import Path

apikey = 'ZTJlOWNhZGUtNzlmZS00ZGU2LTkwYjMtZDk1ODRlMDkwODM5' #from the APK
secret = 'MTRjZTVjM2EtOGVlZi00OTU3LWFmNjktNTllODFhNmYyNzI5' #from the APK

def download_file(url, filename):
	with requests.get(url, stream=True) as r:
		r.raise_for_status()
		with open(filename, 'wb') as f:
			for chunk in r.iter_content(chunk_size=8192): 
				# If you have chunk encoded response uncomment if
				# and set chunk_size parameter to None.
				#if chunk: 
				f.write(chunk)

def search(query):
	headers = {
		'apikey': apikey,
		'User-Agent': 'okhttp/3.12.1',
	}
	params = (
		('catalog', 'DE'),
		('lang', 'de_DE'),
		('offset', '0'),
		('per_type_limit', '5'),
		('query', query),
		('rights', '2'),
		('type', 'album,artist,track'),
	)
	response = requests.get('http://api.rhapsody.com/v2.2/search', headers=headers, params=params)
	return response.json()

#album_id e.g. alb.XXXXXXXXXXX
def get_album_tracks_info(album_id):
	if "alb." != album_id[:len("alb.")]:
		raise Exception("not an album id")
	headers = {
		'apikey': apikey,
		'User-Agent': 'okhttp/3.12.1',
	}
	params = (
		('catalog', 'DE'),
		('lang', 'de_DE'),
		('rights', '2'),
	)

	response = requests.get(f'http://api.rhapsody.com/v2.2/albums/{album_id}/tracks', headers=headers, params=params)
	return response.json()

def auth_user(username, password):
	headers = {
	    'User-Agent': 'okhttp/3.12.1',
	}

	data = {
	  'username': username,
	  'password': password,
	  'grant_type': 'password'
	}

	response = requests.post('https://api.rhapsody.com/oauth/token', headers=headers, data=data, auth=HTTPBasicAuth(apikey, secret))
	return response.json()["access_token"] # also contains other stuff

def get_audio_stream_info(track_id, access_token, bitrate=44100, format="FLAC"):
	if "tra." != track_id[:len("tra.")]:
		raise Exception("not an track id")
	headers = {
		'Accept': 'application/json',
		'Authorization': f'Bearer {access_token}',
		'Host': 'api.rhapsody.com',
		'User-Agent': 'okhttp/3.12.1',
	}

	params = (
		('bitrate', str(bitrate)),
		('format', format),
		('protocol', ''),
		('track', track_id),
	)

	response = requests.get('https://api.rhapsody.com/v2.2/streams', headers=headers, params=params)
	return response.json()

def download_album(album_id, access_token):
	album_info = get_album_tracks_info(album_id)
	for track in album_info["tracks"]:
		stream_info = get_audio_stream_info(track["id"], access_token)
		stream_url = stream_info["streams"][0]["url"]
		directory = Path("./") / f'{track["artistName"]} - {track["albumName"]}'
		directory.mkdir(exist_ok=True, parents=True)
		download_file(stream_url, directory / f'{track["index"]}. {track["name"]}.flac')