Make SubFox production-ready with parallel translation and UI controls

.venv/lib/python3.10/site-packages/starlette/applications.py

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+from __future__ import annotations
+
+from collections.abc import Awaitable, Callable, Mapping, Sequence
+from typing import Any, ParamSpec, TypeVar
+
+from starlette.datastructures import State, URLPath
+from starlette.middleware import Middleware, _MiddlewareFactory
+from starlette.middleware.errors import ServerErrorMiddleware
+from starlette.middleware.exceptions import ExceptionMiddleware
+from starlette.requests import Request
+from starlette.responses import Response
+from starlette.routing import BaseRoute, Router
+from starlette.types import ASGIApp, ExceptionHandler, Lifespan, Receive, Scope, Send
+
+AppType = TypeVar("AppType", bound="Starlette")
+P = ParamSpec("P")
+
+
+class Starlette:
+    """Creates an Starlette application."""
+
+    def __init__(
+        self: AppType,
+        debug: bool = False,
+        routes: Sequence[BaseRoute] | None = None,
+        middleware: Sequence[Middleware] | None = None,
+        exception_handlers: Mapping[Any, ExceptionHandler] | None = None,
+        lifespan: Lifespan[AppType] | None = None,
+    ) -> None:
+        """Initializes the application.
+
+        Parameters:
+            debug: Boolean indicating if debug tracebacks should be returned on errors.
+            routes: A list of routes to serve incoming HTTP and WebSocket requests.
+            middleware: A list of middleware to run for every request. A starlette
+                application will always automatically include two middleware classes.
+                `ServerErrorMiddleware` is added as the very outermost middleware, to handle
+                any uncaught errors occurring anywhere in the entire stack.
+                `ExceptionMiddleware` is added as the very innermost middleware, to deal
+                with handled exception cases occurring in the routing or endpoints.
+            exception_handlers: A mapping of either integer status codes,
+                or exception class types onto callables which handle the exceptions.
+                Exception handler callables should be of the form
+                `handler(request, exc) -> response` and may be either standard functions, or
+                async functions.
+            lifespan: A lifespan context function, which can be used to perform
+                startup and shutdown tasks. This is a newer style that replaces the
+                `on_startup` and `on_shutdown` handlers. Use one or the other, not both.
+        """
+        self.debug = debug
+        self.state = State()
+        self.router = Router(routes, lifespan=lifespan)
+        self.exception_handlers = {} if exception_handlers is None else dict(exception_handlers)
+        self.user_middleware = [] if middleware is None else list(middleware)
+        self.middleware_stack: ASGIApp | None = None
+
+    def build_middleware_stack(self) -> ASGIApp:
+        debug = self.debug
+        error_handler = None
+        exception_handlers: dict[Any, ExceptionHandler] = {}
+
+        for key, value in self.exception_handlers.items():
+            if key in (500, Exception):
+                error_handler = value
+            else:
+                exception_handlers[key] = value
+
+        middleware = (
+            [Middleware(ServerErrorMiddleware, handler=error_handler, debug=debug)]
+            + self.user_middleware
+            + [Middleware(ExceptionMiddleware, handlers=exception_handlers, debug=debug)]
+        )
+
+        app = self.router
+        for cls, args, kwargs in reversed(middleware):
+            app = cls(app, *args, **kwargs)
+        return app
+
+    @property
+    def routes(self) -> list[BaseRoute]:
+        return self.router.routes
+
+    def url_path_for(self, name: str, /, **path_params: Any) -> URLPath:
+        return self.router.url_path_for(name, **path_params)
+
+    async def __call__(self, scope: Scope, receive: Receive, send: Send) -> None:
+        scope["app"] = self
+        if self.middleware_stack is None:
+            self.middleware_stack = self.build_middleware_stack()
+        await self.middleware_stack(scope, receive, send)
+
+    def mount(self, path: str, app: ASGIApp, name: str | None = None) -> None:
+        self.router.mount(path, app=app, name=name)  # pragma: no cover
+
+    def host(self, host: str, app: ASGIApp, name: str | None = None) -> None:
+        self.router.host(host, app=app, name=name)  # pragma: no cover
+
+    def add_middleware(self, middleware_class: _MiddlewareFactory[P], *args: P.args, **kwargs: P.kwargs) -> None:
+        if self.middleware_stack is not None:  # pragma: no cover
+            raise RuntimeError("Cannot add middleware after an application has started")
+        self.user_middleware.insert(0, Middleware(middleware_class, *args, **kwargs))
+
+    def add_exception_handler(
+        self,
+        exc_class_or_status_code: int | type[Exception],
+        handler: ExceptionHandler,
+    ) -> None:  # pragma: no cover
+        self.exception_handlers[exc_class_or_status_code] = handler
+
+    def add_route(
+        self,
+        path: str,
+        route: Callable[[Request], Awaitable[Response] | Response],
+        methods: list[str] | None = None,
+        name: str | None = None,
+        include_in_schema: bool = True,
+    ) -> None:  # pragma: no cover
+        self.router.add_route(path, route, methods=methods, name=name, include_in_schema=include_in_schema)