radiko downloader (m3u8)

radiko_downloader.py

from requests import get
from os import path as os_path
from re import findall
from random import choices
from string import ascii_lowercase, digits
from base64 import b64encode

radiko_url = "https://radiko.jp/#!/ts/QRR/20240512213000"

ua = "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/124.0.0.0 Safari/537.36"

def randomstr(n):
   return ''.join(choices(ascii_lowercase + digits, k=n))

def fileName(name: str):
    i = 1
    base_name, ext = os_path.splitext(name)
    while os_path.isfile(name):
        name = f'{base_name}_{i}{ext}'
        i = i + 1
    return name

def main():
    station_id = radiko_url.split("/")[-2]
    station_url = f'https://api.radiko.jp/program/v4/date/{radiko_url.split("/")[-1][:8]}/station/{station_id}.json'
    response = get(station_url)
    obj = response.json()
    program = [program for i in obj["stations"] for program in i["programs"]["program"] if program["ft"] == radiko_url.split("/")[-1]]
    if not program: raise IndexError()

    start = program[0]["ft"]
    finish = program[0]["to"]

    print(program[0]["season_name"], "\n")

    area_url = "https://api.radiko.jp/apparea/area"
    response = get(area_url)
    area = findall(r'class="(.+?)"', response.text)[0]

    response = get(radiko_url)
    common = findall(r'src="(/apps/js/playerCommon\.js\?_=\d{8})"', response.text)[0]

    cpmmon_url = f'https://radiko.jp{common}'
    response = get(cpmmon_url)
    complete_key = findall(r"'pc_html5', '(.+?)'", response.text)[0]

    check_url = "https://radiko.jp/ap/member/webapi/v2/member/login/check"
    response = get(check_url)
    set_cookie = response.headers["Set-Cookie"]
    session = set_cookie.split(" ")[0]
    print(session)

    auth1_url = "https://radiko.jp/v2/api/auth1"
    header = {
        "cookie": f'{session} default_area_id={area}; tracking_area_id={area}; shortscc=11; a_exp={randomstr(32)};',
        "x-radiko-user": "dummy_user",
        "x-radiko-device": "pc",
        "x-radiko-app": "pc_html5",
        "x-radiko-app-version": "0.0.1",
        "user-agent": ua,
    }
    response = get(auth1_url, headers=header)
    token = response.headers["x-radiko-authtoken"]
    key_offset = int(response.headers["x-radiko-keyoffset"])
    print(f'token={token}')

    partial_key = b64encode(complete_key[key_offset:key_offset+16].encode()).decode()
    print(f'partial_key={partial_key}')

    auth2_url = "https://radiko.jp/v2/api/auth2"
    header = {
        "cookie": f'{session} default_area_id={area}; tracking_area_id={area}; rdk_uid={randomstr(32)};',
        "x-radiko-user": "dummy_user",
        "x-radiko-device": "pc",
        "X-Radiko-Authtoken": token,
        "X-Radiko-partialkey": partial_key,
        "user-agent": ua,
    }
    response = get(auth2_url, headers=header)

    url = f'https://tf-f-rpaa-radiko.smartstream.ne.jp/tf/playlist.m3u8?station_id={station_id}&start_at={start}&ft={start}&end_at={finish}&to={finish}&l=15&lsid=58b7f4fc73c0e0d8c56c0553d3220a26&type=b' # idk
    header = {
        "X-Radiko-Authtoken": token,
        "X-Radiko-Areaid": area,
        "user-agent": ua,
    }
    response = get(url, headers=header)
    response.raise_for_status()

    print()
    out_name = fileName(f'radiko_{start}_{finish}.m3u8')
    with open(out_name, "wb") as f:
       f.write(response.content)
       print(out_name)

main()