"""Stores API connection session and sends requests""" import re import time import random import logging from functools import partial from typing import Optional, Union from typing import Dict, Any import requests from cloudscraper import CloudScraper from . import atjsparse from .aterrors import TokenError from .aterrors import CloudflareError from .aterrors import AternosPermissionError REQUA = \ 'Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 ' \ '(KHTML, like Gecko) Chrome/99.0.4844.84 Safari/537.36 OPR/85.0.4341.47' class AternosConnect: """Class for sending API requests bypass Cloudflare and parsing responses""" def __init__(self) -> None: self.session = CloudScraper() self.sec = '' self.token = '' def parse_token(self) -> str: """Parses Aternos ajax token that is needed for most requests Raises: RuntimeWarning: If the parser can not find `` tag in HTML response TokenError: If the parser is unable to extract ajax token from HTML Returns: Aternos ajax token """ loginpage = self.request_cloudflare( 'https://aternos.org/go/', 'GET' ).content # Using the standard string methods # instead of the expensive xml parsing head = b'' headtag = loginpage.find(head) headend = loginpage.find(b'', headtag + len(head)) # Some checks if headtag < 0 or headend < 0: pagehead = loginpage raise RuntimeWarning( 'Unable to find tag, parsing the whole page' ) # Extracting content headtag = headtag + len(head) pagehead = loginpage[headtag:headend] try: text = pagehead.decode('utf-8', 'replace') js_code = re.findall(r'\(\(\)(.*?)\)\(\);', text) token_func = js_code[0] if len(js_code) > 1: token_func = js_code[1] ctx = atjsparse.exec_js(token_func) self.token = ctx.window['AJAX_TOKEN'] except (IndexError, TypeError) as err: raise TokenError( 'Unable to parse TOKEN from the page' ) from err return self.token def generate_sec(self) -> str: """Generates Aternos SEC token which is also needed for most API requests Returns: Random SEC `key:value` string """ randkey = self.generate_aternos_rand() randval = self.generate_aternos_rand() self.sec = f'{randkey}:{randval}' self.session.cookies.set( f'ATERNOS_SEC_{randkey}', randval, domain='aternos.org' ) return self.sec def generate_aternos_rand(self, randlen: int = 16) -> str: """Generates a random string using Aternos algorithm from main.js file Args: randlen (int, optional): Random string length Returns: Random string for SEC token """ # a list with randlen+1 empty strings: # generate a string with spaces, # then split it by space rand_arr = (' ' * (randlen + 1)).split(' ') rand = random.random() rand_alphanum = self.convert_num(rand, 36) + ('0' * 17) return rand_alphanum[:18].join(rand_arr)[:randlen] def convert_num( self, num: Union[int, float, str], base: int, frombase: int = 10) -> str: """Converts an integer to specified base Args: num (Union[int,float,str]): Integer in any base to convert. If it is a float starting with `0.`, zero and point will be removed to get int base (int): New base frombase (int, optional): Given number base Returns: Number converted to a specified base """ if isinstance(num, str): num = int(num, frombase) if isinstance(num, float): sliced = str(num)[2:] num = int(sliced) symbols = '0123456789abcdefghijklmnopqrstuvwxyz' basesym = symbols[:base] result = '' while num > 0: rem = num % base result = str(basesym[rem]) + result num //= base return result def request_cloudflare( self, url: str, method: str, params: Optional[Dict[Any, Any]] = None, data: Optional[Dict[Any, Any]] = None, headers: Optional[Dict[Any, Any]] = None, reqcookies: Optional[Dict[Any, Any]] = None, sendtoken: bool = False, retry: int = 5) -> requests.Response: """Sends a request to Aternos API bypass Cloudflare Args: url (str): Request URL method (str): Request method, must be GET or POST params (Optional[Dict[Any, Any]], optional): URL parameters data (Optional[Dict[Any, Any]], optional): POST request data, if the method is GET, this dict will be combined with params headers (Optional[Dict[Any, Any]], optional): Custom headers reqcookies (Optional[Dict[Any, Any]], optional): Cookies only for this request sendtoken (bool, optional): If the ajax and SEC token should be sent retry (int, optional): How many times parser must retry connection to API bypass Cloudflare Raises: CloudflareError: When the parser has exceeded retries count NotImplementedError: When the specified method is not GET or POST Returns: API response """ if retry <= 0: raise CloudflareError('Unable to bypass Cloudflare protection') old_cookies = self.session.cookies self.session = CloudScraper() self.session.cookies.update(old_cookies) params = params or {} data = data or {} headers = headers or {} reqcookies = reqcookies or {} method = method or 'GET' method = method.upper().strip() if method not in ('GET', 'POST'): raise NotImplementedError('Only GET and POST are available') if sendtoken: params['TOKEN'] = self.token params['SEC'] = self.sec headers['X-Requested-With'] = 'XMLHttpRequest' # requests.cookies.CookieConflictError bugfix reqcookies['ATERNOS_SESSION'] = self.atsession del self.session.cookies['ATERNOS_SESSION'] logging.debug(f'Requesting({method}){url}') logging.debug(f'headers={headers}') logging.debug(f'params={params}') logging.debug(f'data={data}') logging.debug(f'req-cookies={reqcookies}') logging.debug(f'session-cookies={self.session.cookies}') if method == 'POST': sendreq = partial( self.session.post, params=params, data=data ) else: sendreq = partial( self.session.get, params={**params, **data} ) req = sendreq( url, headers=headers, cookies=reqcookies ) resp_type = req.headers.get('content-type', '') html_type = resp_type.find('text/html') != -1 cloudflare = req.status_code == 403 if html_type and cloudflare: logging.info('Retrying to bypass Cloudflare') time.sleep(0.2) return self.request_cloudflare( url, method, params, data, headers, reqcookies, sendtoken, retry - 1 ) logging.debug('AternosConnect received: ' + req.text[:65]) logging.info( f'{method} completed with {req.status_code} status' ) if req.status_code == 402: raise AternosPermissionError req.raise_for_status() return req @property def atsession(self) -> str: """Aternos session cookie, empty string if not logged in Returns: Session cookie """ return self.session.cookies.get( 'ATERNOS_SESSION', '' )