import httpx

import re

def parse_detail(response):

return response['songs'][0]['album']['picUrl']

def parse_playlist(response):

return response['result']['coverImgUrl']

def parse_avatar(response):

return response['playlist'][0]['creator']['avatarUrl']

def parse_album(response):

return response['album']['picUrl']

def parse_dj(response):

return response['program']['coverUrl']

def parse_djradio(response):

return response['djRadio']['picUrl']

apis = {

'detail': 'https://music.163.com/api/song/detail/?ids=[{id}]',

'playlist': 'https://music.163.com/api/playlist/detail?id={id}',

'avatar': 'https://music.163.com/api/user/playlist/?offset=0&limit=1&uid={id}',

'album': 'https://music.163.com/api/album/{id}',

'dj': 'https://music.163.com/api/dj/program/detail?id={id}',

'program': 'https://music.163.com/api/dj/program/detail?id={id}',

'djradio': 'https://music.163.com/api/djradio/get?id={id}'

}

patterns = {

'detail': r'song(\?id=|/)(?P<id>\d+)',

'playlist': r'playlist(\?id=|/)(?P<id>\d+)',

'avatar': r'home\?id=(?P<id>\d+)',

'album': r'album(\?id=|/)(?P<id>\d+)',

'dj': r'dj(\?id=|/)(?P<id>\d+)',

'program': r'program(\?id=|/)(?P<id>\d+)',

'djradio': r'djradio(\?id=|/)(?P<id>\d+)'

}

parsers = {

'detail': parse_detail,

'playlist': parse_playlist,

'avatar': parse_avatar,

'album': parse_album,

'dj': parse_dj,

'program': parse_dj,

'djradio': parse_djradio

}

def get_cover(url):

cover = ''

for method, pattern in patterns.items():

pattern = patterns[method]

result = re.search(pattern, url)

if not result:

continue

cover = query_by_id(result.group('id'), method)

return cover

def query_by_id(item_id, method):

url = apis[method]

res = httpx.get(url.format(id=item_id)).json()

try:

return parsers[method](res)

except KeyError:

return ''

def lambda_handler(event, _context):

return {

'statusCode': 200,

'body': get_cover(event['queryStringParameters']['url'])

}