ZipFile/README.md

## README.md

      
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              README.md
            
          
    Retrieving Auth Token


Run the command:
python pixiv_auth.py login
This will open the browser with Pixiv login page.


Open dev console (F12) and switch to network tab.


Enable persistent logging ("Preserve log").


Type into the filter field: callback?


Proceed with Pixiv login.


After logging in you should see a blank page and request that looks like this: https://app-api.pixiv.net/web/v1/users/auth/pixiv/callback?state=...&code=.... Copy value of the code param into the pixiv_auth.py's prompt and hit the Enter key.


If you did everything right and Pixiv did not change their auth flow, pair of auth_token and refresh_token should be displayed.

⚠️ code's lifetime is extremely short, so make sure to minimize delay between step 5 and 6. Otherwise, repeat everything starting step 1.

Refresh Tokens
python pixiv_auth.py refresh OLD_REFRESH_TOKEN

  
## pixiv_auth.py
#!/usr/bin/env python

from argparse import ArgumentParser
from base64 import urlsafe_b64encode
from hashlib import sha256
from pprint import pprint
from secrets import token_urlsafe
from sys import exit
from urllib.parse import urlencode
from webbrowser import open as open_url

import requests

# Latest app version can be found using GET /v1/application-info/android
USER_AGENT = "PixivAndroidApp/5.0.234 (Android 11; Pixel 5)"
REDIRECT_URI = "https://app-api.pixiv.net/web/v1/users/auth/pixiv/callback"
LOGIN_URL = "https://app-api.pixiv.net/web/v1/login"
AUTH_TOKEN_URL = "https://oauth.secure.pixiv.net/auth/token"
CLIENT_ID = "MOBrBDS8blbauoSck0ZfDbtuzpyT"
CLIENT_SECRET = "lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj"


def s256(data):
    """S256 transformation method."""

    return urlsafe_b64encode(sha256(data).digest()).rstrip(b"=").decode("ascii")


def oauth_pkce(transform):
    """Proof Key for Code Exchange by OAuth Public Clients (RFC7636)."""

    code_verifier = token_urlsafe(32)
    code_challenge = transform(code_verifier.encode("ascii"))

    return code_verifier, code_challenge


def print_auth_token_response(response):
    data = response.json()

    try:
        access_token = data["access_token"]
        refresh_token = data["refresh_token"]
    except KeyError:
        print("error:")
        pprint(data)
        exit(1)

    print("access_token:", access_token)
    print("refresh_token:", refresh_token)
    print("expires_in:", data.get("expires_in", 0))


def login():
    code_verifier, code_challenge = oauth_pkce(s256)
    login_params = {
        "code_challenge": code_challenge,
        "code_challenge_method": "S256",
        "client": "pixiv-android",
    }

    open_url(f"{LOGIN_URL}?{urlencode(login_params)}")

    try:
        code = input("code: ").strip()
    except (EOFError, KeyboardInterrupt):
        return

    response = requests.post(
        AUTH_TOKEN_URL,
        data={
            "client_id": CLIENT_ID,
            "client_secret": CLIENT_SECRET,
            "code": code,
            "code_verifier": code_verifier,
            "grant_type": "authorization_code",
            "include_policy": "true",
            "redirect_uri": REDIRECT_URI,
        },
        headers={"User-Agent": USER_AGENT},
    )

    print_auth_token_response(response)


def refresh(refresh_token):
    response = requests.post(
        AUTH_TOKEN_URL,
        data={
            "client_id": CLIENT_ID,
            "client_secret": CLIENT_SECRET,
            "grant_type": "refresh_token",
            "include_policy": "true",
            "refresh_token": refresh_token,
        },
        headers={"User-Agent": USER_AGENT},
    )
    print_auth_token_response(response)


def main():
    parser = ArgumentParser()
    subparsers = parser.add_subparsers()
    parser.set_defaults(func=lambda _: parser.print_usage())
    login_parser = subparsers.add_parser("login")
    login_parser.set_defaults(func=lambda _: login())
    refresh_parser = subparsers.add_parser("refresh")
    refresh_parser.add_argument("refresh_token")
    refresh_parser.set_defaults(func=lambda ns: refresh(ns.refresh_token))
    args = parser.parse_args()
    args.func(args)


if __name__ == "__main__":
    main()
	#!/usr/bin/env python

	from argparse import ArgumentParser
	from base64 import urlsafe_b64encode
	from hashlib import sha256
	from pprint import pprint
	from secrets import token_urlsafe
	from sys import exit
	from urllib.parse import urlencode
	from webbrowser import open as open_url

	import requests

	# Latest app version can be found using GET /v1/application-info/android
	USER_AGENT = "PixivAndroidApp/5.0.234 (Android 11; Pixel 5)"
	REDIRECT_URI = "https://app-api.pixiv.net/web/v1/users/auth/pixiv/callback"
	LOGIN_URL = "https://app-api.pixiv.net/web/v1/login"
	AUTH_TOKEN_URL = "https://oauth.secure.pixiv.net/auth/token"
	CLIENT_ID = "MOBrBDS8blbauoSck0ZfDbtuzpyT"
	CLIENT_SECRET = "lsACyCD94FhDUtGTXi3QzcFE2uU1hqtDaKeqrdwj"


	def s256(data):
	"""S256 transformation method."""

	return urlsafe_b64encode(sha256(data).digest()).rstrip(b"=").decode("ascii")


	def oauth_pkce(transform):
	"""Proof Key for Code Exchange by OAuth Public Clients (RFC7636)."""

	code_verifier = token_urlsafe(32)
	code_challenge = transform(code_verifier.encode("ascii"))

	return code_verifier, code_challenge


	def print_auth_token_response(response):
	data = response.json()

	try:
	access_token = data["access_token"]
	refresh_token = data["refresh_token"]
	except KeyError:
	print("error:")
	pprint(data)
	exit(1)

	print("access_token:", access_token)
	print("refresh_token:", refresh_token)
	print("expires_in:", data.get("expires_in", 0))


	def login():
	code_verifier, code_challenge = oauth_pkce(s256)
	login_params = {
	"code_challenge": code_challenge,
	"code_challenge_method": "S256",
	"client": "pixiv-android",
	}

	open_url(f"{LOGIN_URL}?{urlencode(login_params)}")

	try:
	code = input("code: ").strip()
	except (EOFError, KeyboardInterrupt):
	return

	response = requests.post(
	AUTH_TOKEN_URL,
	data={
	"client_id": CLIENT_ID,
	"client_secret": CLIENT_SECRET,
	"code": code,
	"code_verifier": code_verifier,
	"grant_type": "authorization_code",
	"include_policy": "true",
	"redirect_uri": REDIRECT_URI,
	},
	headers={"User-Agent": USER_AGENT},
	)

	print_auth_token_response(response)


	def refresh(refresh_token):
	response = requests.post(
	AUTH_TOKEN_URL,
	data={
	"client_id": CLIENT_ID,
	"client_secret": CLIENT_SECRET,
	"grant_type": "refresh_token",
	"include_policy": "true",
	"refresh_token": refresh_token,
	},
	headers={"User-Agent": USER_AGENT},
	)
	print_auth_token_response(response)


	def main():
	parser = ArgumentParser()
	subparsers = parser.add_subparsers()
	parser.set_defaults(func=lambda _: parser.print_usage())
	login_parser = subparsers.add_parser("login")
	login_parser.set_defaults(func=lambda _: login())
	refresh_parser = subparsers.add_parser("refresh")
	refresh_parser.add_argument("refresh_token")
	refresh_parser.set_defaults(func=lambda ns: refresh(ns.refresh_token))
	args = parser.parse_args()
	args.func(args)


	if __name__ == "__main__":
	main()