from time import sleep as time_sleep from asyncio import sleep as asyncio_sleep from curl_cffi.requests.session import CurlError from curl_cffi import CurlHttpVersion from curl_cffi.requests.impersonate import DEFAULT_CHROME from curl_cffi.requests import ( ProxySpec, CookieTypes, BrowserTypeLiteral, Session as CurlSession, AsyncSession as AsyncCurlSession, ) from scrapling.core.utils import log from scrapling.core._types import ( Dict, Optional, Tuple, Mapping, SUPPORTED_HTTP_METHODS, Awaitable, List, Any, ) from .toolbelt.custom import Response from .toolbelt.convertor import ResponseFactory from .toolbelt.fingerprints import generate_convincing_referer, generate_headers, __default_useragent__ _UNSET = object() class FetcherSession: """ A context manager that provides configured Fetcher sessions. When this manager is used in a 'with' or 'async with' block, it yields a new session configured with the manager's defaults. A single instance of this manager should ideally be used for one active session at a time (or sequentially). Re-entering a context with the same manager instance while a session is already active is disallowed. """ def __init__( self, impersonate: Optional[BrowserTypeLiteral] = DEFAULT_CHROME, http3: Optional[bool] = False, stealthy_headers: Optional[bool] = True, proxies: Optional[Dict[str, str]] = None, proxy: Optional[str] = None, proxy_auth: Optional[Tuple[str, str]] = None, timeout: Optional[int | float] = 30, headers: Optional[Dict[str, str]] = None, retries: Optional[int] = 3, retry_delay: Optional[int] = 1, follow_redirects: bool = True, max_redirects: int = 30, verify: bool = True, cert: Optional[str | Tuple[str, str]] = None, selector_config: Optional[Dict] = None, ): """ :param impersonate: Browser version to impersonate. Automatically defaults to the latest available Chrome version. :param http3: Whether to use HTTP3. Defaults to False. It might be problematic if used it with `impersonate`. :param stealthy_headers: If enabled (default), it creates and adds real browser headers. It also sets the referer header as if this request came from a Google search of URL's domain. :param proxies: Dict of proxies to use. Format: {"http": proxy_url, "https": proxy_url}. :param proxy: Proxy URL to use. Format: "http://username:password@localhost:8030". Cannot be used together with the `proxies` parameter. :param proxy_auth: HTTP basic auth for proxy, tuple of (username, password). :param timeout: Number of seconds to wait before timing out. :param headers: Headers to include in the session with every request. :param retries: Number of retry attempts. Defaults to 3. :param retry_delay: Number of seconds to wait between retry attempts. Defaults to 1 second. :param follow_redirects: Whether to follow redirects. Defaults to True. :param max_redirects: Maximum number of redirects. Default 30, use -1 for unlimited. :param verify: Whether to verify HTTPS certificates. Defaults to True. :param cert: Tuple of (cert, key) filenames for the client certificate. :param selector_config: Arguments passed when creating the final Selector class. """ self.default_impersonate = impersonate self.stealth = stealthy_headers self.default_proxies = proxies or {} self.default_proxy = proxy or None self.default_proxy_auth = proxy_auth or None self.default_timeout = timeout self.default_headers = headers or {} self.default_retries = retries self.default_retry_delay = retry_delay self.default_follow_redirects = follow_redirects self.default_max_redirects = max_redirects self.default_verify = verify self.default_cert = cert self.default_http3 = http3 self.selector_config = selector_config or {} self._curl_session: Optional[CurlSession] | bool = None self._async_curl_session: Optional[AsyncCurlSession] | bool = None def _merge_request_args(self, **kwargs) -> Dict[str, Any]: """Merge request-specific arguments with default session arguments.""" url = kwargs.pop("url") request_args = {} headers = self.get_with_precedence(kwargs, "headers", self.default_headers) stealth = self.get_with_precedence(kwargs, "stealth", self.stealth) impersonate = self.get_with_precedence(kwargs, "impersonate", self.default_impersonate) if self.get_with_precedence(kwargs, "http3", self.default_http3): # pragma: no cover request_args["http_version"] = CurlHttpVersion.V3ONLY if impersonate: log.warning( "The argument `http3` might cause errors if used with `impersonate` argument, try switching it off if you encounter any curl errors." ) request_args.update( { "url": url, # Curl automatically generates the suitable browser headers when you use `impersonate` "headers": self._headers_job(url, headers, stealth, bool(impersonate)), "proxies": self.get_with_precedence(kwargs, "proxies", self.default_proxies), "proxy": self.get_with_precedence(kwargs, "proxy", self.default_proxy), "proxy_auth": self.get_with_precedence(kwargs, "proxy_auth", self.default_proxy_auth), "timeout": self.get_with_precedence(kwargs, "timeout", self.default_timeout), "allow_redirects": self.get_with_precedence(kwargs, "allow_redirects", self.default_follow_redirects), "max_redirects": self.get_with_precedence(kwargs, "max_redirects", self.default_max_redirects), "verify": self.get_with_precedence(kwargs, "verify", self.default_verify), "cert": self.get_with_precedence(kwargs, "cert", self.default_cert), "impersonate": impersonate, **{ k: v for k, v in kwargs.items() if v not in ( _UNSET, None, ) }, # Add any remaining parameters (after all known ones are popped) } ) return request_args def _headers_job( self, url, headers: Optional[Dict], stealth: Optional[bool], impersonate_enabled: bool, ) -> Dict: """Adds useragent to headers if it doesn't exist, generates real headers and append it to current headers, and finally generates a referer header that looks like if this request came from Google's search of the current URL's domain. :param headers: Current headers in the request if the user passed any :param stealth: Whether to enable the `stealthy_headers` argument to this request or not. If `None`, it defaults to the session default value. :param impersonate_enabled: Whether the browser impersonation is enabled or not. :return: A dictionary of the new headers. """ # Handle headers - if it was _UNSET, use default_headers if headers is _UNSET: headers = self.default_headers.copy() else: # Merge session headers with request headers, request takes precedence headers = {**self.default_headers, **(headers or {})} headers_keys = set(map(str.lower, headers.keys())) if stealth: if "referer" not in headers_keys: headers.update({"referer": generate_convincing_referer(url)}) if impersonate_enabled: # Curl will generate the suitable headers return headers extra_headers = generate_headers(browser_mode=False) # Don't overwrite user-supplied headers extra_headers = {key: value for key, value in extra_headers.items() if key.lower() not in headers_keys} headers.update(extra_headers) elif "user-agent" not in headers_keys and not impersonate_enabled: headers["User-Agent"] = __default_useragent__ log.debug(f"Can't find useragent in headers so '{headers['User-Agent']}' was used.") return headers def __enter__(self): """Creates and returns a new synchronous Fetcher Session""" if self._curl_session: raise RuntimeError( "This FetcherSession instance already has an active synchronous session. " "Create a new FetcherSession instance for a new independent session, " "or use the current instance sequentially after the previous context has exited." ) if self._async_curl_session: # Prevent mixing if async is active from this instance raise RuntimeError( "This FetcherSession instance has an active asynchronous session. " "Cannot enter a synchronous context simultaneously with the same manager instance." ) self._curl_session = CurlSession() return self def __exit__(self, exc_type, exc_val, exc_tb): """Closes the active synchronous session managed by this instance, if any.""" if self._curl_session: self._curl_session.close() self._curl_session = None async def __aenter__(self): """Creates and returns a new asynchronous Session.""" if self._async_curl_session: raise RuntimeError( "This FetcherSession instance already has an active asynchronous session. " "Create a new FetcherSession instance for a new independent session, " "or use the current instance sequentially after the previous context has exited." ) if self._curl_session: # Prevent mixing if sync is active from this instance raise RuntimeError( "This FetcherSession instance has an active synchronous session. " "Cannot enter an asynchronous context simultaneously with the same manager instance." ) self._async_curl_session = AsyncCurlSession() return self async def __aexit__(self, exc_type, exc_val, exc_tb): """Closes the active asynchronous session managed by this instance, if any.""" if self._async_curl_session: await self._async_curl_session.close() self._async_curl_session = None def __make_request( self, method: SUPPORTED_HTTP_METHODS, request_args: Dict[str, Any], max_retries: int, retry_delay: int, selector_config: Optional[Dict] = None, ) -> Response: """ Perform an HTTP request using the configured session. :param method: HTTP method to be used, supported methods are ["GET", "POST", "PUT", "DELETE"] :param request_args: Arguments to be passed to the session's `request()` method. :param max_retries: Maximum number of retries for the request. :param retry_delay: Number of seconds to wait between retries. :param selector_config: Arguments passed when creating the final Selector class. :return: A `Response` object for synchronous requests or an awaitable for asynchronous. """ session = self._curl_session if session is True and not any((self.__enter__, self.__exit__, self.__aenter__, self.__aexit__)): # For usage inside FetcherClient # It turns out `curl_cffi` caches impersonation state, so if you turned it off, then on then off, it won't be off on the last time. session = CurlSession() if session: for attempt in range(max_retries): try: response = session.request(method, **request_args) # response.raise_for_status() # Retry responses with a status code between 200-400 return ResponseFactory.from_http_request(response, selector_config) except CurlError as e: # pragma: no cover if attempt < max_retries - 1: log.error(f"Attempt {attempt + 1} failed: {e}. Retrying in {retry_delay} seconds...") time_sleep(retry_delay) else: log.error(f"Failed after {max_retries} attempts: {e}") raise # Raise the exception if all retries fail raise RuntimeError("No active session available.") # pragma: no cover async def __make_async_request( self, method: SUPPORTED_HTTP_METHODS, request_args: Dict[str, Any], max_retries: int, retry_delay: int, selector_config: Optional[Dict] = None, ) -> Response: """ Perform an HTTP request using the configured session. :param method: HTTP method to be used, supported methods are ["GET", "POST", "PUT", "DELETE"] :param request_args: Arguments to be passed to the session's `request()` method. :param max_retries: Maximum number of retries for the request. :param retry_delay: Number of seconds to wait between retries. :param selector_config: Arguments passed when creating the final Selector class. :return: A `Response` object for synchronous requests or an awaitable for asynchronous. """ session = self._async_curl_session if session is True and not any((self.__enter__, self.__exit__, self.__aenter__, self.__aexit__)): # For usage inside the ` AsyncFetcherClient ` class, and that's for several reasons # 1. It turns out `curl_cffi` caches impersonation state, so if you turned it off, then on then off, it won't be off on the last time. # 2. `curl_cffi` doesn't support making async requests without sessions # 3. Using a single session for many requests at the same time in async doesn't sit well with curl_cffi. session = AsyncCurlSession() if session: for attempt in range(max_retries): try: response = await session.request(method, **request_args) # response.raise_for_status() # Retry responses with a status code between 200-400 return ResponseFactory.from_http_request(response, selector_config) except CurlError as e: # pragma: no cover if attempt < max_retries - 1: log.error(f"Attempt {attempt + 1} failed: {e}. Retrying in {retry_delay} seconds...") await asyncio_sleep(retry_delay) else: log.error(f"Failed after {max_retries} attempts: {e}") raise # Raise the exception if all retries fail raise RuntimeError("No active session available.") # pragma: no cover @staticmethod def get_with_precedence(kwargs, key, default_value): """Get value with request-level priority over session-level""" request_value = kwargs.pop(key, _UNSET) return request_value if request_value is not _UNSET else default_value def __prepare_and_dispatch( self, method: SUPPORTED_HTTP_METHODS, stealth: Optional[bool] = None, **kwargs, ) -> Response | Awaitable[Response]: """ Internal dispatcher. Prepares arguments and calls sync or async request helper. :param method: HTTP method to be used, supported methods are ["GET", "POST", "PUT", "DELETE"] :param stealth: Whether to enable the `stealthy_headers` argument to this request or not. If `None`, it defaults to the session default value. :param url: Target URL for the request. :param kwargs: Additional request-specific arguments. :return: A `Response` object for synchronous requests or an awaitable for asynchronous. """ stealth = self.stealth if stealth is None else stealth selector_config = kwargs.pop("selector_config", {}) or self.selector_config max_retries = self.get_with_precedence(kwargs, "retries", self.default_retries) retry_delay = self.get_with_precedence(kwargs, "retry_delay", self.default_retry_delay) request_args = self._merge_request_args(stealth=stealth, **kwargs) if self._curl_session: return self.__make_request(method, request_args, max_retries, retry_delay, selector_config) elif self._async_curl_session: # The returned value is a Coroutine return self.__make_async_request(method, request_args, max_retries, retry_delay, selector_config) raise RuntimeError("No active session available.") def get( self, url: str, params: Optional[Dict | List | Tuple] = None, headers: Optional[Mapping[str, Optional[str]]] = _UNSET, cookies: Optional[CookieTypes] = None, timeout: Optional[int | float] = _UNSET, follow_redirects: Optional[bool] = _UNSET, max_redirects: Optional[int] = _UNSET, retries: Optional[int] = _UNSET, retry_delay: Optional[int] = _UNSET, proxies: Optional[ProxySpec] = _UNSET, proxy: Optional[str] = _UNSET, proxy_auth: Optional[Tuple[str, str]] = _UNSET, auth: Optional[Tuple[str, str]] = None, verify: Optional[bool] = _UNSET, cert: Optional[str | Tuple[str, str]] = _UNSET, impersonate: Optional[BrowserTypeLiteral] = _UNSET, http3: Optional[bool] = _UNSET, stealthy_headers: Optional[bool] = _UNSET, **kwargs, ) -> Response | Awaitable[Response]: """ Perform a GET request. :param url: Target URL for the request. :param params: Query string parameters for the request. :param headers: Headers to include in the request. :param cookies: Cookies to use in the request. :param timeout: Number of seconds to wait before timing out. :param follow_redirects: Whether to follow redirects. Defaults to True. :param max_redirects: Maximum number of redirects. Default 30, use -1 for unlimited. :param retries: Number of retry attempts. Defaults to 3. :param retry_delay: Number of seconds to wait between retry attempts. Defaults to 1 second. :param proxies: Dict of proxies to use. :param proxy: Proxy URL to use. Format: "http://username:password@localhost:8030". Cannot be used together with the `proxies` parameter. :param proxy_auth: HTTP basic auth for proxy, tuple of (username, password). :param auth: HTTP basic auth tuple of (username, password). Only basic auth is supported. :param verify: Whether to verify HTTPS certificates. :param cert: Tuple of (cert, key) filenames for the client certificate. :param impersonate: Browser version to impersonate. Automatically defaults to the latest available Chrome version. :param http3: Whether to use HTTP3. Defaults to False. It might be problematic if used it with `impersonate`. :param stealthy_headers: If enabled (default), it creates and adds real browser headers. It also sets the referer header as if this request came from a Google search of URL's domain. :param kwargs: Additional keyword arguments to pass to the [`curl_cffi.requests.Session().request()`, `curl_cffi.requests.AsyncSession().request()`] method. :return: A `Response` object or an awaitable for async. """ request_args = { "url": url, "params": params, "headers": headers, "cookies": cookies, "timeout": timeout, "retry_delay": retry_delay, "allow_redirects": follow_redirects, "max_redirects": max_redirects, "retries": retries, "proxies": proxies, "proxy": proxy, "proxy_auth": proxy_auth, "auth": auth, "verify": verify, "cert": cert, "impersonate": impersonate, "http3": http3, **kwargs, } return self.__prepare_and_dispatch("GET", stealth=stealthy_headers, **request_args) def post( self, url: str, data: Optional[Dict | str] = None, json: Optional[Dict | List] = None, headers: Optional[Mapping[str, Optional[str]]] = _UNSET, params: Optional[Dict | List | Tuple] = None, cookies: Optional[CookieTypes] = None, timeout: Optional[int | float] = _UNSET, follow_redirects: Optional[bool] = _UNSET, max_redirects: Optional[int] = _UNSET, retries: Optional[int] = _UNSET, retry_delay: Optional[int] = _UNSET, proxies: Optional[ProxySpec] = _UNSET, proxy: Optional[str] = _UNSET, proxy_auth: Optional[Tuple[str, str]] = _UNSET, auth: Optional[Tuple[str, str]] = None, verify: Optional[bool] = _UNSET, cert: Optional[str | Tuple[str, str]] = _UNSET, impersonate: Optional[BrowserTypeLiteral] = _UNSET, http3: Optional[bool] = _UNSET, stealthy_headers: Optional[bool] = _UNSET, **kwargs, ) -> Response | Awaitable[Response]: """ Perform a POST request. :param url: Target URL for the request. :param data: Form data to include in the request body. :param json: A JSON serializable object to include in the body of the request. :param headers: Headers to include in the request. :param params: Query string parameters for the request. :param cookies: Cookies to use in the request. :param timeout: Number of seconds to wait before timing out. :param follow_redirects: Whether to follow redirects. Defaults to True. :param max_redirects: Maximum number of redirects. Default 30, use -1 for unlimited. :param retries: Number of retry attempts. Defaults to 3. :param retry_delay: Number of seconds to wait between retry attempts. Defaults to 1 second. :param proxies: Dict of proxies to use. Format: {"http": proxy_url, "https": proxy_url}. :param proxy: Proxy URL to use. Format: "http://username:password@localhost:8030". Cannot be used together with the `proxies` parameter. :param proxy_auth: HTTP basic auth for proxy, tuple of (username, password). :param auth: HTTP basic auth tuple of (username, password). Only basic auth is supported. :param verify: Whether to verify HTTPS certificates. Defaults to True. :param cert: Tuple of (cert, key) filenames for the client certificate. :param impersonate: Browser version to impersonate. Automatically defaults to the latest available Chrome version. :param http3: Whether to use HTTP3. Defaults to False. It might be problematic if used it with `impersonate`. :param stealthy_headers: If enabled (default), it creates and adds real browser headers. It also sets the referer header as if this request came from a Google search of URL's domain. :param kwargs: Additional keyword arguments to pass to the [`curl_cffi.requests.Session().request()`, `curl_cffi.requests.AsyncSession().request()`] method. :return: A `Response` object or an awaitable for async. """ request_args = { "url": url, "data": data, "json": json, "headers": headers, "params": params, "cookies": cookies, "timeout": timeout, "retry_delay": retry_delay, "proxy": proxy, "impersonate": impersonate, "allow_redirects": follow_redirects, "max_redirects": max_redirects, "retries": retries, "proxies": proxies, "proxy_auth": proxy_auth, "auth": auth, "verify": verify, "cert": cert, "http3": http3, **kwargs, } return self.__prepare_and_dispatch("POST", stealth=stealthy_headers, **request_args) def put( self, url: str, data: Optional[Dict | str] = None, json: Optional[Dict | List] = None, headers: Optional[Mapping[str, Optional[str]]] = _UNSET, params: Optional[Dict | List | Tuple] = None, cookies: Optional[CookieTypes] = None, timeout: Optional[int | float] = _UNSET, follow_redirects: Optional[bool] = _UNSET, max_redirects: Optional[int] = _UNSET, retries: Optional[int] = _UNSET, retry_delay: Optional[int] = _UNSET, proxies: Optional[ProxySpec] = _UNSET, proxy: Optional[str] = _UNSET, proxy_auth: Optional[Tuple[str, str]] = _UNSET, auth: Optional[Tuple[str, str]] = None, verify: Optional[bool] = _UNSET, cert: Optional[str | Tuple[str, str]] = _UNSET, impersonate: Optional[BrowserTypeLiteral] = _UNSET, http3: Optional[bool] = _UNSET, stealthy_headers: Optional[bool] = _UNSET, **kwargs, ) -> Response | Awaitable[Response]: """ Perform a PUT request. :param url: Target URL for the request. :param data: Form data to include in the request body. :param json: A JSON serializable object to include in the body of the request. :param headers: Headers to include in the request. :param params: Query string parameters for the request. :param cookies: Cookies to use in the request. :param timeout: Number of seconds to wait before timing out. :param follow_redirects: Whether to follow redirects. Defaults to True. :param max_redirects: Maximum number of redirects. Default 30, use -1 for unlimited. :param retries: Number of retry attempts. Defaults to 3. :param retry_delay: Number of seconds to wait between retry attempts. Defaults to 1 second. :param proxies: Dict of proxies to use. Format: {"http": proxy_url, "https": proxy_url}. :param proxy: Proxy URL to use. Format: "http://username:password@localhost:8030". Cannot be used together with the `proxies` parameter. :param proxy_auth: HTTP basic auth for proxy, tuple of (username, password). :param auth: HTTP basic auth tuple of (username, password). Only basic auth is supported. :param verify: Whether to verify HTTPS certificates. Defaults to True. :param cert: Tuple of (cert, key) filenames for the client certificate. :param impersonate: Browser version to impersonate. Automatically defaults to the latest available Chrome version. :param http3: Whether to use HTTP3. Defaults to False. It might be problematic if used it with `impersonate`. :param stealthy_headers: If enabled (default), it creates and adds real browser headers. It also sets the referer header as if this request came from a Google search of URL's domain. :param kwargs: Additional keyword arguments to pass to the [`curl_cffi.requests.Session().request()`, `curl_cffi.requests.AsyncSession().request()`] method. :return: A `Response` object or an awaitable for async. """ request_args = { "url": url, "data": data, "json": json, "headers": headers, "params": params, "cookies": cookies, "timeout": timeout, "retry_delay": retry_delay, "proxy": proxy, "impersonate": impersonate, "allow_redirects": follow_redirects, "max_redirects": max_redirects, "retries": retries, "proxies": proxies, "proxy_auth": proxy_auth, "auth": auth, "verify": verify, "cert": cert, "http3": http3, **kwargs, } return self.__prepare_and_dispatch("PUT", stealth=stealthy_headers, **request_args) def delete( self, url: str, data: Optional[Dict | str] = None, json: Optional[Dict | List] = None, headers: Optional[Mapping[str, Optional[str]]] = _UNSET, params: Optional[Dict | List | Tuple] = None, cookies: Optional[CookieTypes] = None, timeout: Optional[int | float] = _UNSET, follow_redirects: Optional[bool] = _UNSET, max_redirects: Optional[int] = _UNSET, retries: Optional[int] = _UNSET, retry_delay: Optional[int] = _UNSET, proxies: Optional[ProxySpec] = _UNSET, proxy: Optional[str] = _UNSET, proxy_auth: Optional[Tuple[str, str]] = _UNSET, auth: Optional[Tuple[str, str]] = None, verify: Optional[bool] = _UNSET, cert: Optional[str | Tuple[str, str]] = _UNSET, impersonate: Optional[BrowserTypeLiteral] = _UNSET, http3: Optional[bool] = _UNSET, stealthy_headers: Optional[bool] = _UNSET, **kwargs, ) -> Response | Awaitable[Response]: """ Perform a DELETE request. :param url: Target URL for the request. :param data: Form data to include in the request body. :param json: A JSON serializable object to include in the body of the request. :param headers: Headers to include in the request. :param params: Query string parameters for the request. :param cookies: Cookies to use in the request. :param timeout: Number of seconds to wait before timing out. :param follow_redirects: Whether to follow redirects. Defaults to True. :param max_redirects: Maximum number of redirects. Default 30, use -1 for unlimited. :param retries: Number of retry attempts. Defaults to 3. :param retry_delay: Number of seconds to wait between retry attempts. Defaults to 1 second. :param proxies: Dict of proxies to use. Format: {"http": proxy_url, "https": proxy_url}. :param proxy: Proxy URL to use. Format: "http://username:password@localhost:8030". Cannot be used together with the `proxies` parameter. :param proxy_auth: HTTP basic auth for proxy, tuple of (username, password). :param auth: HTTP basic auth tuple of (username, password). Only basic auth is supported. :param verify: Whether to verify HTTPS certificates. Defaults to True. :param cert: Tuple of (cert, key) filenames for the client certificate. :param impersonate: Browser version to impersonate. Automatically defaults to the latest available Chrome version. :param http3: Whether to use HTTP3. Defaults to False. It might be problematic if used it with `impersonate`. :param stealthy_headers: If enabled (default), it creates and adds real browser headers. It also sets the referer header as if this request came from a Google search of URL's domain. :param kwargs: Additional keyword arguments to pass to the [`curl_cffi.requests.Session().request()`, `curl_cffi.requests.AsyncSession().request()`] method. :return: A `Response` object or an awaitable for async. """ request_args = { "url": url, # Careful of sending a body in a DELETE request, it might cause some websites to reject the request as per https://www.rfc-editor.org/rfc/rfc7231#section-4.3.5, # But some websites accept it, it depends on the implementation used. "data": data, "json": json, "headers": headers, "params": params, "cookies": cookies, "timeout": timeout, "retry_delay": retry_delay, "proxy": proxy, "impersonate": impersonate, "allow_redirects": follow_redirects, "max_redirects": max_redirects, "retries": retries, "proxies": proxies, "proxy_auth": proxy_auth, "auth": auth, "verify": verify, "cert": cert, "http3": http3, **kwargs, } return self.__prepare_and_dispatch("DELETE", stealth=stealthy_headers, **request_args) class FetcherClient(FetcherSession): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.__enter__ = None self.__exit__ = None self.__aenter__ = None self.__aexit__ = None self._curl_session = True class AsyncFetcherClient(FetcherSession): def __init__(self, *args, **kwargs): super().__init__(*args, **kwargs) self.__enter__ = None self.__exit__ = None self.__aenter__ = None self.__aexit__ = None self._async_curl_session = True