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import asyncio |
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import logging |
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from abc import ABC, abstractmethod |
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from collections.abc import Sized |
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from http.cookies import BaseCookie, Morsel |
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from typing import ( |
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TYPE_CHECKING, |
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Any, |
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Awaitable, |
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Callable, |
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Dict, |
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Generator, |
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Iterable, |
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List, |
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Optional, |
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Tuple, |
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) |
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from multidict import CIMultiDict |
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from yarl import URL |
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from .helpers import get_running_loop |
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from .typedefs import LooseCookies |
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if TYPE_CHECKING: |
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from .web_app import Application |
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from .web_exceptions import HTTPException |
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from .web_request import BaseRequest, Request |
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from .web_response import StreamResponse |
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else: |
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BaseRequest = Request = Application = StreamResponse = None |
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HTTPException = None |
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class AbstractRouter(ABC): |
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def __init__(self) -> None: |
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self._frozen = False |
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def post_init(self, app: Application) -> None: |
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"""Post init stage. |
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Not an abstract method for sake of backward compatibility, |
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but if the router wants to be aware of the application |
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it can override this. |
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""" |
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@property |
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def frozen(self) -> bool: |
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return self._frozen |
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def freeze(self) -> None: |
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"""Freeze router.""" |
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self._frozen = True |
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@abstractmethod |
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async def resolve(self, request: Request) -> "AbstractMatchInfo": |
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"""Return MATCH_INFO for given request""" |
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class AbstractMatchInfo(ABC): |
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@property |
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@abstractmethod |
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def handler(self) -> Callable[[Request], Awaitable[StreamResponse]]: |
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"""Execute matched request handler""" |
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@property |
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@abstractmethod |
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def expect_handler(self) -> Callable[[Request], Awaitable[None]]: |
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"""Expect handler for 100-continue processing""" |
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@property |
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@abstractmethod |
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def http_exception(self) -> Optional[HTTPException]: |
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"""HTTPException instance raised on router's resolving, or None""" |
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@abstractmethod |
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def get_info(self) -> Dict[str, Any]: |
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"""Return a dict with additional info useful for introspection""" |
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@property |
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@abstractmethod |
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def apps(self) -> Tuple[Application, ...]: |
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"""Stack of nested applications. |
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Top level application is left-most element. |
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""" |
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@abstractmethod |
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def add_app(self, app: Application) -> None: |
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"""Add application to the nested apps stack.""" |
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@abstractmethod |
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def freeze(self) -> None: |
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"""Freeze the match info. |
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The method is called after route resolution. |
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After the call .add_app() is forbidden. |
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""" |
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class AbstractView(ABC): |
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"""Abstract class based view.""" |
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def __init__(self, request: Request) -> None: |
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self._request = request |
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@property |
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def request(self) -> Request: |
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"""Request instance.""" |
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return self._request |
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@abstractmethod |
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def __await__(self) -> Generator[Any, None, StreamResponse]: |
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"""Execute the view handler.""" |
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class AbstractResolver(ABC): |
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"""Abstract DNS resolver.""" |
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@abstractmethod |
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async def resolve(self, host: str, port: int, family: int) -> List[Dict[str, Any]]: |
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"""Return IP address for given hostname""" |
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@abstractmethod |
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async def close(self) -> None: |
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"""Release resolver""" |
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if TYPE_CHECKING: |
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IterableBase = Iterable[Morsel[str]] |
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else: |
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IterableBase = Iterable |
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ClearCookiePredicate = Callable[["Morsel[str]"], bool] |
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class AbstractCookieJar(Sized, IterableBase): |
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"""Abstract Cookie Jar.""" |
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def __init__(self, *, loop: Optional[asyncio.AbstractEventLoop] = None) -> None: |
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self._loop = get_running_loop(loop) |
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@abstractmethod |
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def clear(self, predicate: Optional[ClearCookiePredicate] = None) -> None: |
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"""Clear all cookies if no predicate is passed.""" |
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@abstractmethod |
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def clear_domain(self, domain: str) -> None: |
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"""Clear all cookies for domain and all subdomains.""" |
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@abstractmethod |
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def update_cookies(self, cookies: LooseCookies, response_url: URL = URL()) -> None: |
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"""Update cookies.""" |
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@abstractmethod |
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def filter_cookies(self, request_url: URL) -> "BaseCookie[str]": |
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"""Return the jar's cookies filtered by their attributes.""" |
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class AbstractStreamWriter(ABC): |
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"""Abstract stream writer.""" |
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buffer_size = 0 |
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output_size = 0 |
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length: Optional[int] = 0 |
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@abstractmethod |
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async def write(self, chunk: bytes) -> None: |
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"""Write chunk into stream.""" |
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@abstractmethod |
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async def write_eof(self, chunk: bytes = b"") -> None: |
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"""Write last chunk.""" |
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@abstractmethod |
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async def drain(self) -> None: |
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"""Flush the write buffer.""" |
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@abstractmethod |
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def enable_compression(self, encoding: str = "deflate") -> None: |
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"""Enable HTTP body compression""" |
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@abstractmethod |
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def enable_chunking(self) -> None: |
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"""Enable HTTP chunked mode""" |
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@abstractmethod |
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async def write_headers( |
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self, status_line: str, headers: "CIMultiDict[str]" |
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) -> None: |
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"""Write HTTP headers""" |
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class AbstractAccessLogger(ABC): |
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"""Abstract writer to access log.""" |
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def __init__(self, logger: logging.Logger, log_format: str) -> None: |
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self.logger = logger |
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self.log_format = log_format |
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@abstractmethod |
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def log(self, request: BaseRequest, response: StreamResponse, time: float) -> None: |
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"""Emit log to logger.""" |
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