일단 커밋. 오랫동안 커밋을 안해서 꼬였다.

리팩토리 중.

.venv/lib/python3.12/site-packages/asgiref/__init__.py

@@ -0,0 +1 @@
+__version__ = "3.8.1"

.venv/lib/python3.12/site-packages/asgiref/compatibility.py

@@ -0,0 +1,48 @@
+import inspect
+
+from .sync import iscoroutinefunction
+
+
+def is_double_callable(application):
+    """
+    Tests to see if an application is a legacy-style (double-callable) application.
+    """
+    # Look for a hint on the object first
+    if getattr(application, "_asgi_single_callable", False):
+        return False
+    if getattr(application, "_asgi_double_callable", False):
+        return True
+    # Uninstanted classes are double-callable
+    if inspect.isclass(application):
+        return True
+    # Instanted classes depend on their __call__
+    if hasattr(application, "__call__"):
+        # We only check to see if its __call__ is a coroutine function -
+        # if it's not, it still might be a coroutine function itself.
+        if iscoroutinefunction(application.__call__):
+            return False
+    # Non-classes we just check directly
+    return not iscoroutinefunction(application)
+
+
+def double_to_single_callable(application):
+    """
+    Transforms a double-callable ASGI application into a single-callable one.
+    """
+
+    async def new_application(scope, receive, send):
+        instance = application(scope)
+        return await instance(receive, send)
+
+    return new_application
+
+
+def guarantee_single_callable(application):
+    """
+    Takes either a single- or double-callable application and always returns it
+    in single-callable style. Use this to add backwards compatibility for ASGI
+    2.0 applications to your server/test harness/etc.
+    """
+    if is_double_callable(application):
+        application = double_to_single_callable(application)
+    return application

.venv/lib/python3.12/site-packages/asgiref/current_thread_executor.py

@@ -0,0 +1,115 @@
+import queue
+import sys
+import threading
+from concurrent.futures import Executor, Future
+from typing import TYPE_CHECKING, Any, Callable, TypeVar, Union
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
+_T = TypeVar("_T")
+_P = ParamSpec("_P")
+_R = TypeVar("_R")
+
+
+class _WorkItem:
+    """
+    Represents an item needing to be run in the executor.
+    Copied from ThreadPoolExecutor (but it's private, so we're not going to rely on importing it)
+    """
+
+    def __init__(
+        self,
+        future: "Future[_R]",
+        fn: Callable[_P, _R],
+        *args: _P.args,
+        **kwargs: _P.kwargs,
+    ):
+        self.future = future
+        self.fn = fn
+        self.args = args
+        self.kwargs = kwargs
+
+    def run(self) -> None:
+        __traceback_hide__ = True  # noqa: F841
+        if not self.future.set_running_or_notify_cancel():
+            return
+        try:
+            result = self.fn(*self.args, **self.kwargs)
+        except BaseException as exc:
+            self.future.set_exception(exc)
+            # Break a reference cycle with the exception 'exc'
+            self = None  # type: ignore[assignment]
+        else:
+            self.future.set_result(result)
+
+
+class CurrentThreadExecutor(Executor):
+    """
+    An Executor that actually runs code in the thread it is instantiated in.
+    Passed to other threads running async code, so they can run sync code in
+    the thread they came from.
+    """
+
+    def __init__(self) -> None:
+        self._work_thread = threading.current_thread()
+        self._work_queue: queue.Queue[Union[_WorkItem, "Future[Any]"]] = queue.Queue()
+        self._broken = False
+
+    def run_until_future(self, future: "Future[Any]") -> None:
+        """
+        Runs the code in the work queue until a result is available from the future.
+        Should be run from the thread the executor is initialised in.
+        """
+        # Check we're in the right thread
+        if threading.current_thread() != self._work_thread:
+            raise RuntimeError(
+                "You cannot run CurrentThreadExecutor from a different thread"
+            )
+        future.add_done_callback(self._work_queue.put)
+        # Keep getting and running work items until we get the future we're waiting for
+        # back via the future's done callback.
+        try:
+            while True:
+                # Get a work item and run it
+                work_item = self._work_queue.get()
+                if work_item is future:
+                    return
+                assert isinstance(work_item, _WorkItem)
+                work_item.run()
+                del work_item
+        finally:
+            self._broken = True
+
+    def _submit(
+        self,
+        fn: Callable[_P, _R],
+        *args: _P.args,
+        **kwargs: _P.kwargs,
+    ) -> "Future[_R]":
+        # Check they're not submitting from the same thread
+        if threading.current_thread() == self._work_thread:
+            raise RuntimeError(
+                "You cannot submit onto CurrentThreadExecutor from its own thread"
+            )
+        # Check they're not too late or the executor errored
+        if self._broken:
+            raise RuntimeError("CurrentThreadExecutor already quit or is broken")
+        # Add to work queue
+        f: "Future[_R]" = Future()
+        work_item = _WorkItem(f, fn, *args, **kwargs)
+        self._work_queue.put(work_item)
+        # Return the future
+        return f
+
+    # Python 3.9+ has a new signature for submit with a "/" after `fn`, to enforce
+    # it to be a positional argument. If we ignore[override] mypy on 3.9+ will be
+    # happy but 3.8 will say that the ignore comment is unused, even when
+    # defining them differently based on sys.version_info.
+    # We should be able to remove this when we drop support for 3.8.
+    if not TYPE_CHECKING:
+
+        def submit(self, fn, *args, **kwargs):
+            return self._submit(fn, *args, **kwargs)

.venv/lib/python3.12/site-packages/asgiref/local.py

@@ -0,0 +1,128 @@
+import asyncio
+import contextlib
+import contextvars
+import threading
+from typing import Any, Dict, Union
+
+
+class _CVar:
+    """Storage utility for Local."""
+
+    def __init__(self) -> None:
+        self._data: "contextvars.ContextVar[Dict[str, Any]]" = contextvars.ContextVar(
+            "asgiref.local"
+        )
+
+    def __getattr__(self, key):
+        storage_object = self._data.get({})
+        try:
+            return storage_object[key]
+        except KeyError:
+            raise AttributeError(f"{self!r} object has no attribute {key!r}")
+
+    def __setattr__(self, key: str, value: Any) -> None:
+        if key == "_data":
+            return super().__setattr__(key, value)
+
+        storage_object = self._data.get({})
+        storage_object[key] = value
+        self._data.set(storage_object)
+
+    def __delattr__(self, key: str) -> None:
+        storage_object = self._data.get({})
+        if key in storage_object:
+            del storage_object[key]
+            self._data.set(storage_object)
+        else:
+            raise AttributeError(f"{self!r} object has no attribute {key!r}")
+
+
+class Local:
+    """Local storage for async tasks.
+
+    This is a namespace object (similar to `threading.local`) where data is
+    also local to the current async task (if there is one).
+
+    In async threads, local means in the same sense as the `contextvars`
+    module - i.e. a value set in an async frame will be visible:
+
+    - to other async code `await`-ed from this frame.
+    - to tasks spawned using `asyncio` utilities (`create_task`, `wait_for`,
+      `gather` and probably others).
+    - to code scheduled in a sync thread using `sync_to_async`
+
+    In "sync" threads (a thread with no async event loop running), the
+    data is thread-local, but additionally shared with async code executed
+    via the `async_to_sync` utility, which schedules async code in a new thread
+    and copies context across to that thread.
+
+    If `thread_critical` is True, then the local will only be visible per-thread,
+    behaving exactly like `threading.local` if the thread is sync, and as
+    `contextvars` if the thread is async. This allows genuinely thread-sensitive
+    code (such as DB handles) to be kept stricly to their initial thread and
+    disable the sharing across `sync_to_async` and `async_to_sync` wrapped calls.
+
+    Unlike plain `contextvars` objects, this utility is threadsafe.
+    """
+
+    def __init__(self, thread_critical: bool = False) -> None:
+        self._thread_critical = thread_critical
+        self._thread_lock = threading.RLock()
+
+        self._storage: "Union[threading.local, _CVar]"
+
+        if thread_critical:
+            # Thread-local storage
+            self._storage = threading.local()
+        else:
+            # Contextvar storage
+            self._storage = _CVar()
+
+    @contextlib.contextmanager
+    def _lock_storage(self):
+        # Thread safe access to storage
+        if self._thread_critical:
+            try:
+                # this is a test for are we in a async or sync
+                # thread - will raise RuntimeError if there is
+                # no current loop
+                asyncio.get_running_loop()
+            except RuntimeError:
+                # We are in a sync thread, the storage is
+                # just the plain thread local (i.e, "global within
+                # this thread" - it doesn't matter where you are
+                # in a call stack you see the same storage)
+                yield self._storage
+            else:
+                # We are in an async thread - storage is still
+                # local to this thread, but additionally should
+                # behave like a context var (is only visible with
+                # the same async call stack)
+
+                # Ensure context exists in the current thread
+                if not hasattr(self._storage, "cvar"):
+                    self._storage.cvar = _CVar()
+
+                # self._storage is a thread local, so the members
+                # can't be accessed in another thread (we don't
+                # need any locks)
+                yield self._storage.cvar
+        else:
+            # Lock for thread_critical=False as other threads
+            # can access the exact same storage object
+            with self._thread_lock:
+                yield self._storage
+
+    def __getattr__(self, key):
+        with self._lock_storage() as storage:
+            return getattr(storage, key)
+
+    def __setattr__(self, key, value):
+        if key in ("_local", "_storage", "_thread_critical", "_thread_lock"):
+            return super().__setattr__(key, value)
+        with self._lock_storage() as storage:
+            setattr(storage, key, value)
+
+    def __delattr__(self, key):
+        with self._lock_storage() as storage:
+            delattr(storage, key)

.venv/lib/python3.12/site-packages/asgiref/server.py

@@ -0,0 +1,157 @@
+import asyncio
+import logging
+import time
+import traceback
+
+from .compatibility import guarantee_single_callable
+
+logger = logging.getLogger(__name__)
+
+
+class StatelessServer:
+    """
+    Base server class that handles basic concepts like application instance
+    creation/pooling, exception handling, and similar, for stateless protocols
+    (i.e. ones without actual incoming connections to the process)
+
+    Your code should override the handle() method, doing whatever it needs to,
+    and calling get_or_create_application_instance with a unique `scope_id`
+    and `scope` for the scope it wants to get.
+
+    If an application instance is found with the same `scope_id`, you are
+    given its input queue, otherwise one is made for you with the scope provided
+    and you are given that fresh new input queue. Either way, you should do
+    something like:
+
+    input_queue = self.get_or_create_application_instance(
+        "user-123456",
+        {"type": "testprotocol", "user_id": "123456", "username": "andrew"},
+    )
+    input_queue.put_nowait(message)
+
+    If you try and create an application instance and there are already
+    `max_application` instances, the oldest/least recently used one will be
+    reclaimed and shut down to make space.
+
+    Application coroutines that error will be found periodically (every 100ms
+    by default) and have their exceptions printed to the console. Override
+    application_exception() if you want to do more when this happens.
+
+    If you override run(), make sure you handle things like launching the
+    application checker.
+    """
+
+    application_checker_interval = 0.1
+
+    def __init__(self, application, max_applications=1000):
+        # Parameters
+        self.application = application
+        self.max_applications = max_applications
+        # Initialisation
+        self.application_instances = {}
+
+    ### Mainloop and handling
+
+    def run(self):
+        """
+        Runs the asyncio event loop with our handler loop.
+        """
+        event_loop = asyncio.get_event_loop()
+        asyncio.ensure_future(self.application_checker())
+        try:
+            event_loop.run_until_complete(self.handle())
+        except KeyboardInterrupt:
+            logger.info("Exiting due to Ctrl-C/interrupt")
+
+    async def handle(self):
+        raise NotImplementedError("You must implement handle()")
+
+    async def application_send(self, scope, message):
+        """
+        Receives outbound sends from applications and handles them.
+        """
+        raise NotImplementedError("You must implement application_send()")
+
+    ### Application instance management
+
+    def get_or_create_application_instance(self, scope_id, scope):
+        """
+        Creates an application instance and returns its queue.
+        """
+        if scope_id in self.application_instances:
+            self.application_instances[scope_id]["last_used"] = time.time()
+            return self.application_instances[scope_id]["input_queue"]
+        # See if we need to delete an old one
+        while len(self.application_instances) > self.max_applications:
+            self.delete_oldest_application_instance()
+        # Make an instance of the application
+        input_queue = asyncio.Queue()
+        application_instance = guarantee_single_callable(self.application)
+        # Run it, and stash the future for later checking
+        future = asyncio.ensure_future(
+            application_instance(
+                scope=scope,
+                receive=input_queue.get,
+                send=lambda message: self.application_send(scope, message),
+            ),
+        )
+        self.application_instances[scope_id] = {
+            "input_queue": input_queue,
+            "future": future,
+            "scope": scope,
+            "last_used": time.time(),
+        }
+        return input_queue
+
+    def delete_oldest_application_instance(self):
+        """
+        Finds and deletes the oldest application instance
+        """
+        oldest_time = min(
+            details["last_used"] for details in self.application_instances.values()
+        )
+        for scope_id, details in self.application_instances.items():
+            if details["last_used"] == oldest_time:
+                self.delete_application_instance(scope_id)
+                # Return to make sure we only delete one in case two have
+                # the same oldest time
+                return
+
+    def delete_application_instance(self, scope_id):
+        """
+        Removes an application instance (makes sure its task is stopped,
+        then removes it from the current set)
+        """
+        details = self.application_instances[scope_id]
+        del self.application_instances[scope_id]
+        if not details["future"].done():
+            details["future"].cancel()
+
+    async def application_checker(self):
+        """
+        Goes through the set of current application instance Futures and cleans up
+        any that are done/prints exceptions for any that errored.
+        """
+        while True:
+            await asyncio.sleep(self.application_checker_interval)
+            for scope_id, details in list(self.application_instances.items()):
+                if details["future"].done():
+                    exception = details["future"].exception()
+                    if exception:
+                        await self.application_exception(exception, details)
+                    try:
+                        del self.application_instances[scope_id]
+                    except KeyError:
+                        # Exception handling might have already got here before us. That's fine.
+                        pass
+
+    async def application_exception(self, exception, application_details):
+        """
+        Called whenever an application coroutine has an exception.
+        """
+        logging.error(
+            "Exception inside application: %s\n%s%s",
+            exception,
+            "".join(traceback.format_tb(exception.__traceback__)),
+            f"  {exception}",
+        )

.venv/lib/python3.12/site-packages/asgiref/sync.py

@@ -0,0 +1,613 @@
+import asyncio
+import asyncio.coroutines
+import contextvars
+import functools
+import inspect
+import os
+import sys
+import threading
+import warnings
+import weakref
+from concurrent.futures import Future, ThreadPoolExecutor
+from typing import (
+    TYPE_CHECKING,
+    Any,
+    Awaitable,
+    Callable,
+    Coroutine,
+    Dict,
+    Generic,
+    List,
+    Optional,
+    TypeVar,
+    Union,
+    overload,
+)
+
+from .current_thread_executor import CurrentThreadExecutor
+from .local import Local
+
+if sys.version_info >= (3, 10):
+    from typing import ParamSpec
+else:
+    from typing_extensions import ParamSpec
+
+if TYPE_CHECKING:
+    # This is not available to import at runtime
+    from _typeshed import OptExcInfo
+
+_F = TypeVar("_F", bound=Callable[..., Any])
+_P = ParamSpec("_P")
+_R = TypeVar("_R")
+
+
+def _restore_context(context: contextvars.Context) -> None:
+    # Check for changes in contextvars, and set them to the current
+    # context for downstream consumers
+    for cvar in context:
+        cvalue = context.get(cvar)
+        try:
+            if cvar.get() != cvalue:
+                cvar.set(cvalue)
+        except LookupError:
+            cvar.set(cvalue)
+
+
+# Python 3.12 deprecates asyncio.iscoroutinefunction() as an alias for
+# inspect.iscoroutinefunction(), whilst also removing the _is_coroutine marker.
+# The latter is replaced with the inspect.markcoroutinefunction decorator.
+# Until 3.12 is the minimum supported Python version, provide a shim.
+
+if hasattr(inspect, "markcoroutinefunction"):
+    iscoroutinefunction = inspect.iscoroutinefunction
+    markcoroutinefunction: Callable[[_F], _F] = inspect.markcoroutinefunction
+else:
+    iscoroutinefunction = asyncio.iscoroutinefunction  # type: ignore[assignment]
+
+    def markcoroutinefunction(func: _F) -> _F:
+        func._is_coroutine = asyncio.coroutines._is_coroutine  # type: ignore
+        return func
+
+
+class ThreadSensitiveContext:
+    """Async context manager to manage context for thread sensitive mode
+
+    This context manager controls which thread pool executor is used when in
+    thread sensitive mode. By default, a single thread pool executor is shared
+    within a process.
+
+    The ThreadSensitiveContext() context manager may be used to specify a
+    thread pool per context.
+
+    This context manager is re-entrant, so only the outer-most call to
+    ThreadSensitiveContext will set the context.
+
+    Usage:
+
+    >>> import time
+    >>> async with ThreadSensitiveContext():
+    ...     await sync_to_async(time.sleep, 1)()
+    """
+
+    def __init__(self):
+        self.token = None
+
+    async def __aenter__(self):
+        try:
+            SyncToAsync.thread_sensitive_context.get()
+        except LookupError:
+            self.token = SyncToAsync.thread_sensitive_context.set(self)
+
+        return self
+
+    async def __aexit__(self, exc, value, tb):
+        if not self.token:
+            return
+
+        executor = SyncToAsync.context_to_thread_executor.pop(self, None)
+        if executor:
+            executor.shutdown()
+        SyncToAsync.thread_sensitive_context.reset(self.token)
+
+
+class AsyncToSync(Generic[_P, _R]):
+    """
+    Utility class which turns an awaitable that only works on the thread with
+    the event loop into a synchronous callable that works in a subthread.
+
+    If the call stack contains an async loop, the code runs there.
+    Otherwise, the code runs in a new loop in a new thread.
+
+    Either way, this thread then pauses and waits to run any thread_sensitive
+    code called from further down the call stack using SyncToAsync, before
+    finally exiting once the async task returns.
+    """
+
+    # Keeps a reference to the CurrentThreadExecutor in local context, so that
+    # any sync_to_async inside the wrapped code can find it.
+    executors: "Local" = Local()
+
+    # When we can't find a CurrentThreadExecutor from the context, such as
+    # inside create_task, we'll look it up here from the running event loop.
+    loop_thread_executors: "Dict[asyncio.AbstractEventLoop, CurrentThreadExecutor]" = {}
+
+    def __init__(
+        self,
+        awaitable: Union[
+            Callable[_P, Coroutine[Any, Any, _R]],
+            Callable[_P, Awaitable[_R]],
+        ],
+        force_new_loop: bool = False,
+    ):
+        if not callable(awaitable) or (
+            not iscoroutinefunction(awaitable)
+            and not iscoroutinefunction(getattr(awaitable, "__call__", awaitable))
+        ):
+            # Python does not have very reliable detection of async functions
+            # (lots of false negatives) so this is just a warning.
+            warnings.warn(
+                "async_to_sync was passed a non-async-marked callable", stacklevel=2
+            )
+        self.awaitable = awaitable
+        try:
+            self.__self__ = self.awaitable.__self__  # type: ignore[union-attr]
+        except AttributeError:
+            pass
+        self.force_new_loop = force_new_loop
+        self.main_event_loop = None
+        try:
+            self.main_event_loop = asyncio.get_running_loop()
+        except RuntimeError:
+            # There's no event loop in this thread.
+            pass
+
+    def __call__(self, *args: _P.args, **kwargs: _P.kwargs) -> _R:
+        __traceback_hide__ = True  # noqa: F841
+
+        if not self.force_new_loop and not self.main_event_loop:
+            # There's no event loop in this thread. Look for the threadlocal if
+            # we're inside SyncToAsync
+            main_event_loop_pid = getattr(
+                SyncToAsync.threadlocal, "main_event_loop_pid", None
+            )
+            # We make sure the parent loop is from the same process - if
+            # they've forked, this is not going to be valid any more (#194)
+            if main_event_loop_pid and main_event_loop_pid == os.getpid():
+                self.main_event_loop = getattr(
+                    SyncToAsync.threadlocal, "main_event_loop", None
+                )
+
+        # You can't call AsyncToSync from a thread with a running event loop
+        try:
+            event_loop = asyncio.get_running_loop()
+        except RuntimeError:
+            pass
+        else:
+            if event_loop.is_running():
+                raise RuntimeError(
+                    "You cannot use AsyncToSync in the same thread as an async event loop - "
+                    "just await the async function directly."
+                )
+
+        # Make a future for the return information
+        call_result: "Future[_R]" = Future()
+
+        # Make a CurrentThreadExecutor we'll use to idle in this thread - we
+        # need one for every sync frame, even if there's one above us in the
+        # same thread.
+        old_executor = getattr(self.executors, "current", None)
+        current_executor = CurrentThreadExecutor()
+        self.executors.current = current_executor
+
+        # Wrapping context in list so it can be reassigned from within
+        # `main_wrap`.
+        context = [contextvars.copy_context()]
+
+        # Get task context so that parent task knows which task to propagate
+        # an asyncio.CancelledError to.
+        task_context = getattr(SyncToAsync.threadlocal, "task_context", None)
+
+        loop = None
+        # Use call_soon_threadsafe to schedule a synchronous callback on the
+        # main event loop's thread if it's there, otherwise make a new loop
+        # in this thread.
+        try:
+            awaitable = self.main_wrap(
+                call_result,
+                sys.exc_info(),
+                task_context,
+                context,
+                *args,
+                **kwargs,
+            )
+
+            if not (self.main_event_loop and self.main_event_loop.is_running()):
+                # Make our own event loop - in a new thread - and run inside that.
+                loop = asyncio.new_event_loop()
+                self.loop_thread_executors[loop] = current_executor
+                loop_executor = ThreadPoolExecutor(max_workers=1)
+                loop_future = loop_executor.submit(
+                    self._run_event_loop, loop, awaitable
+                )
+                if current_executor:
+                    # Run the CurrentThreadExecutor until the future is done
+                    current_executor.run_until_future(loop_future)
+                # Wait for future and/or allow for exception propagation
+                loop_future.result()
+            else:
+                # Call it inside the existing loop
+                self.main_event_loop.call_soon_threadsafe(
+                    self.main_event_loop.create_task, awaitable
+                )
+                if current_executor:
+                    # Run the CurrentThreadExecutor until the future is done
+                    current_executor.run_until_future(call_result)
+        finally:
+            # Clean up any executor we were running
+            if loop is not None:
+                del self.loop_thread_executors[loop]
+            _restore_context(context[0])
+            # Restore old current thread executor state
+            self.executors.current = old_executor
+
+        # Wait for results from the future.
+        return call_result.result()
+
+    def _run_event_loop(self, loop, coro):
+        """
+        Runs the given event loop (designed to be called in a thread).
+        """
+        asyncio.set_event_loop(loop)
+        try:
+            loop.run_until_complete(coro)
+        finally:
+            try:
+                # mimic asyncio.run() behavior
+                # cancel unexhausted async generators
+                tasks = asyncio.all_tasks(loop)
+                for task in tasks:
+                    task.cancel()
+
+                async def gather():
+                    await asyncio.gather(*tasks, return_exceptions=True)
+
+                loop.run_until_complete(gather())
+                for task in tasks:
+                    if task.cancelled():
+                        continue
+                    if task.exception() is not None:
+                        loop.call_exception_handler(
+                            {
+                                "message": "unhandled exception during loop shutdown",
+                                "exception": task.exception(),
+                                "task": task,
+                            }
+                        )
+                if hasattr(loop, "shutdown_asyncgens"):
+                    loop.run_until_complete(loop.shutdown_asyncgens())
+            finally:
+                loop.close()
+                asyncio.set_event_loop(self.main_event_loop)
+
+    def __get__(self, parent: Any, objtype: Any) -> Callable[_P, _R]:
+        """
+        Include self for methods
+        """
+        func = functools.partial(self.__call__, parent)
+        return functools.update_wrapper(func, self.awaitable)
+
+    async def main_wrap(
+        self,
+        call_result: "Future[_R]",
+        exc_info: "OptExcInfo",
+        task_context: "Optional[List[asyncio.Task[Any]]]",
+        context: List[contextvars.Context],
+        *args: _P.args,
+        **kwargs: _P.kwargs,
+    ) -> None:
+        """
+        Wraps the awaitable with something that puts the result into the
+        result/exception future.
+        """
+
+        __traceback_hide__ = True  # noqa: F841
+
+        if context is not None:
+            _restore_context(context[0])
+
+        current_task = asyncio.current_task()
+        if current_task is not None and task_context is not None:
+            task_context.append(current_task)
+
+        try:
+            # If we have an exception, run the function inside the except block
+            # after raising it so exc_info is correctly populated.
+            if exc_info[1]:
+                try:
+                    raise exc_info[1]
+                except BaseException:
+                    result = await self.awaitable(*args, **kwargs)
+            else:
+                result = await self.awaitable(*args, **kwargs)
+        except BaseException as e:
+            call_result.set_exception(e)
+        else:
+            call_result.set_result(result)
+        finally:
+            if current_task is not None and task_context is not None:
+                task_context.remove(current_task)
+            context[0] = contextvars.copy_context()
+
+
+class SyncToAsync(Generic[_P, _R]):
+    """
+    Utility class which turns a synchronous callable into an awaitable that
+    runs in a threadpool. It also sets a threadlocal inside the thread so
+    calls to AsyncToSync can escape it.
+
+    If thread_sensitive is passed, the code will run in the same thread as any
+    outer code. This is needed for underlying Python code that is not
+    threadsafe (for example, code which handles SQLite database connections).
+
+    If the outermost program is async (i.e. SyncToAsync is outermost), then
+    this will be a dedicated single sub-thread that all sync code runs in,
+    one after the other. If the outermost program is sync (i.e. AsyncToSync is
+    outermost), this will just be the main thread. This is achieved by idling
+    with a CurrentThreadExecutor while AsyncToSync is blocking its sync parent,
+    rather than just blocking.
+
+    If executor is passed in, that will be used instead of the loop's default executor.
+    In order to pass in an executor, thread_sensitive must be set to False, otherwise
+    a TypeError will be raised.
+    """
+
+    # Storage for main event loop references
+    threadlocal = threading.local()
+
+    # Single-thread executor for thread-sensitive code
+    single_thread_executor = ThreadPoolExecutor(max_workers=1)
+
+    # Maintain a contextvar for the current execution context. Optionally used
+    # for thread sensitive mode.
+    thread_sensitive_context: "contextvars.ContextVar[ThreadSensitiveContext]" = (
+        contextvars.ContextVar("thread_sensitive_context")
+    )
+
+    # Contextvar that is used to detect if the single thread executor
+    # would be awaited on while already being used in the same context
+    deadlock_context: "contextvars.ContextVar[bool]" = contextvars.ContextVar(
+        "deadlock_context"
+    )
+
+    # Maintaining a weak reference to the context ensures that thread pools are
+    # erased once the context goes out of scope. This terminates the thread pool.
+    context_to_thread_executor: "weakref.WeakKeyDictionary[ThreadSensitiveContext, ThreadPoolExecutor]" = (
+        weakref.WeakKeyDictionary()
+    )
+
+    def __init__(
+        self,
+        func: Callable[_P, _R],
+        thread_sensitive: bool = True,
+        executor: Optional["ThreadPoolExecutor"] = None,
+    ) -> None:
+        if (
+            not callable(func)
+            or iscoroutinefunction(func)
+            or iscoroutinefunction(getattr(func, "__call__", func))
+        ):
+            raise TypeError("sync_to_async can only be applied to sync functions.")
+        self.func = func
+        functools.update_wrapper(self, func)
+        self._thread_sensitive = thread_sensitive
+        markcoroutinefunction(self)
+        if thread_sensitive and executor is not None:
+            raise TypeError("executor must not be set when thread_sensitive is True")
+        self._executor = executor
+        try:
+            self.__self__ = func.__self__  # type: ignore
+        except AttributeError:
+            pass
+
+    async def __call__(self, *args: _P.args, **kwargs: _P.kwargs) -> _R:
+        __traceback_hide__ = True  # noqa: F841
+        loop = asyncio.get_running_loop()
+
+        # Work out what thread to run the code in
+        if self._thread_sensitive:
+            current_thread_executor = getattr(AsyncToSync.executors, "current", None)
+            if current_thread_executor:
+                # If we have a parent sync thread above somewhere, use that
+                executor = current_thread_executor
+            elif self.thread_sensitive_context.get(None):
+                # If we have a way of retrieving the current context, attempt
+                # to use a per-context thread pool executor
+                thread_sensitive_context = self.thread_sensitive_context.get()
+
+                if thread_sensitive_context in self.context_to_thread_executor:
+                    # Re-use thread executor in current context
+                    executor = self.context_to_thread_executor[thread_sensitive_context]
+                else:
+                    # Create new thread executor in current context
+                    executor = ThreadPoolExecutor(max_workers=1)
+                    self.context_to_thread_executor[thread_sensitive_context] = executor
+            elif loop in AsyncToSync.loop_thread_executors:
+                # Re-use thread executor for running loop
+                executor = AsyncToSync.loop_thread_executors[loop]
+            elif self.deadlock_context.get(False):
+                raise RuntimeError(
+                    "Single thread executor already being used, would deadlock"
+                )
+            else:
+                # Otherwise, we run it in a fixed single thread
+                executor = self.single_thread_executor
+                self.deadlock_context.set(True)
+        else:
+            # Use the passed in executor, or the loop's default if it is None
+            executor = self._executor
+
+        context = contextvars.copy_context()
+        child = functools.partial(self.func, *args, **kwargs)
+        func = context.run
+        task_context: List[asyncio.Task[Any]] = []
+
+        # Run the code in the right thread
+        exec_coro = loop.run_in_executor(
+            executor,
+            functools.partial(
+                self.thread_handler,
+                loop,
+                sys.exc_info(),
+                task_context,
+                func,
+                child,
+            ),
+        )
+        ret: _R
+        try:
+            ret = await asyncio.shield(exec_coro)
+        except asyncio.CancelledError:
+            cancel_parent = True
+            try:
+                task = task_context[0]
+                task.cancel()
+                try:
+                    await task
+                    cancel_parent = False
+                except asyncio.CancelledError:
+                    pass
+            except IndexError:
+                pass
+            if exec_coro.done():
+                raise
+            if cancel_parent:
+                exec_coro.cancel()
+            ret = await exec_coro
+        finally:
+            _restore_context(context)
+            self.deadlock_context.set(False)
+
+        return ret
+
+    def __get__(
+        self, parent: Any, objtype: Any
+    ) -> Callable[_P, Coroutine[Any, Any, _R]]:
+        """
+        Include self for methods
+        """
+        func = functools.partial(self.__call__, parent)
+        return functools.update_wrapper(func, self.func)
+
+    def thread_handler(self, loop, exc_info, task_context, func, *args, **kwargs):
+        """
+        Wraps the sync application with exception handling.
+        """
+
+        __traceback_hide__ = True  # noqa: F841
+
+        # Set the threadlocal for AsyncToSync
+        self.threadlocal.main_event_loop = loop
+        self.threadlocal.main_event_loop_pid = os.getpid()
+        self.threadlocal.task_context = task_context
+
+        # Run the function
+        # If we have an exception, run the function inside the except block
+        # after raising it so exc_info is correctly populated.
+        if exc_info[1]:
+            try:
+                raise exc_info[1]
+            except BaseException:
+                return func(*args, **kwargs)
+        else:
+            return func(*args, **kwargs)
+
+
+@overload
+def async_to_sync(
+    *,
+    force_new_loop: bool = False,
+) -> Callable[
+    [Union[Callable[_P, Coroutine[Any, Any, _R]], Callable[_P, Awaitable[_R]]]],
+    Callable[_P, _R],
+]:
+    ...
+
+
+@overload
+def async_to_sync(
+    awaitable: Union[
+        Callable[_P, Coroutine[Any, Any, _R]],
+        Callable[_P, Awaitable[_R]],
+    ],
+    *,
+    force_new_loop: bool = False,
+) -> Callable[_P, _R]:
+    ...
+
+
+def async_to_sync(
+    awaitable: Optional[
+        Union[
+            Callable[_P, Coroutine[Any, Any, _R]],
+            Callable[_P, Awaitable[_R]],
+        ]
+    ] = None,
+    *,
+    force_new_loop: bool = False,
+) -> Union[
+    Callable[
+        [Union[Callable[_P, Coroutine[Any, Any, _R]], Callable[_P, Awaitable[_R]]]],
+        Callable[_P, _R],
+    ],
+    Callable[_P, _R],
+]:
+    if awaitable is None:
+        return lambda f: AsyncToSync(
+            f,
+            force_new_loop=force_new_loop,
+        )
+    return AsyncToSync(
+        awaitable,
+        force_new_loop=force_new_loop,
+    )
+
+
+@overload
+def sync_to_async(
+    *,
+    thread_sensitive: bool = True,
+    executor: Optional["ThreadPoolExecutor"] = None,
+) -> Callable[[Callable[_P, _R]], Callable[_P, Coroutine[Any, Any, _R]]]:
+    ...
+
+
+@overload
+def sync_to_async(
+    func: Callable[_P, _R],
+    *,
+    thread_sensitive: bool = True,
+    executor: Optional["ThreadPoolExecutor"] = None,
+) -> Callable[_P, Coroutine[Any, Any, _R]]:
+    ...
+
+
+def sync_to_async(
+    func: Optional[Callable[_P, _R]] = None,
+    *,
+    thread_sensitive: bool = True,
+    executor: Optional["ThreadPoolExecutor"] = None,
+) -> Union[
+    Callable[[Callable[_P, _R]], Callable[_P, Coroutine[Any, Any, _R]]],
+    Callable[_P, Coroutine[Any, Any, _R]],
+]:
+    if func is None:
+        return lambda f: SyncToAsync(
+            f,
+            thread_sensitive=thread_sensitive,
+            executor=executor,
+        )
+    return SyncToAsync(
+        func,
+        thread_sensitive=thread_sensitive,
+        executor=executor,
+    )

.venv/lib/python3.12/site-packages/asgiref/testing.py

@@ -0,0 +1,103 @@
+import asyncio
+import contextvars
+import time
+
+from .compatibility import guarantee_single_callable
+from .timeout import timeout as async_timeout
+
+
+class ApplicationCommunicator:
+    """
+    Runs an ASGI application in a test mode, allowing sending of
+    messages to it and retrieval of messages it sends.
+    """
+
+    def __init__(self, application, scope):
+        self.application = guarantee_single_callable(application)
+        self.scope = scope
+        self.input_queue = asyncio.Queue()
+        self.output_queue = asyncio.Queue()
+        # Clear context - this ensures that context vars set in the testing scope
+        # are not "leaked" into the application which would normally begin with
+        # an empty context. In Python >= 3.11 this could also be written as:
+        # asyncio.create_task(..., context=contextvars.Context())
+        self.future = contextvars.Context().run(
+            asyncio.create_task,
+            self.application(scope, self.input_queue.get, self.output_queue.put),
+        )
+
+    async def wait(self, timeout=1):
+        """
+        Waits for the application to stop itself and returns any exceptions.
+        """
+        try:
+            async with async_timeout(timeout):
+                try:
+                    await self.future
+                    self.future.result()
+                except asyncio.CancelledError:
+                    pass
+        finally:
+            if not self.future.done():
+                self.future.cancel()
+                try:
+                    await self.future
+                except asyncio.CancelledError:
+                    pass
+
+    def stop(self, exceptions=True):
+        if not self.future.done():
+            self.future.cancel()
+        elif exceptions:
+            # Give a chance to raise any exceptions
+            self.future.result()
+
+    def __del__(self):
+        # Clean up on deletion
+        try:
+            self.stop(exceptions=False)
+        except RuntimeError:
+            # Event loop already stopped
+            pass
+
+    async def send_input(self, message):
+        """
+        Sends a single message to the application
+        """
+        # Give it the message
+        await self.input_queue.put(message)
+
+    async def receive_output(self, timeout=1):
+        """
+        Receives a single message from the application, with optional timeout.
+        """
+        # Make sure there's not an exception to raise from the task
+        if self.future.done():
+            self.future.result()
+        # Wait and receive the message
+        try:
+            async with async_timeout(timeout):
+                return await self.output_queue.get()
+        except asyncio.TimeoutError as e:
+            # See if we have another error to raise inside
+            if self.future.done():
+                self.future.result()
+            else:
+                self.future.cancel()
+                try:
+                    await self.future
+                except asyncio.CancelledError:
+                    pass
+            raise e
+
+    async def receive_nothing(self, timeout=0.1, interval=0.01):
+        """
+        Checks that there is no message to receive in the given time.
+        """
+        # `interval` has precedence over `timeout`
+        start = time.monotonic()
+        while time.monotonic() - start < timeout:
+            if not self.output_queue.empty():
+                return False
+            await asyncio.sleep(interval)
+        return self.output_queue.empty()

.venv/lib/python3.12/site-packages/asgiref/timeout.py

@@ -0,0 +1,118 @@
+# This code is originally sourced from the aio-libs project "async_timeout",
+# under the Apache 2.0 license. You may see the original project at
+# https://github.com/aio-libs/async-timeout
+
+# It is vendored here to reduce chain-dependencies on this library, and
+# modified slightly to remove some features we don't use.
+
+
+import asyncio
+import warnings
+from types import TracebackType
+from typing import Any  # noqa
+from typing import Optional, Type
+
+
+class timeout:
+    """timeout context manager.
+
+    Useful in cases when you want to apply timeout logic around block
+    of code or in cases when asyncio.wait_for is not suitable. For example:
+
+    >>> with timeout(0.001):
+    ...     async with aiohttp.get('https://github.com') as r:
+    ...         await r.text()
+
+
+    timeout - value in seconds or None to disable timeout logic
+    loop - asyncio compatible event loop
+    """
+
+    def __init__(
+        self,
+        timeout: Optional[float],
+        *,
+        loop: Optional[asyncio.AbstractEventLoop] = None,
+    ) -> None:
+        self._timeout = timeout
+        if loop is None:
+            loop = asyncio.get_running_loop()
+        else:
+            warnings.warn(
+                """The loop argument to timeout() is deprecated.""", DeprecationWarning
+            )
+        self._loop = loop
+        self._task = None  # type: Optional[asyncio.Task[Any]]
+        self._cancelled = False
+        self._cancel_handler = None  # type: Optional[asyncio.Handle]
+        self._cancel_at = None  # type: Optional[float]
+
+    def __enter__(self) -> "timeout":
+        return self._do_enter()
+
+    def __exit__(
+        self,
+        exc_type: Type[BaseException],
+        exc_val: BaseException,
+        exc_tb: TracebackType,
+    ) -> Optional[bool]:
+        self._do_exit(exc_type)
+        return None
+
+    async def __aenter__(self) -> "timeout":
+        return self._do_enter()
+
+    async def __aexit__(
+        self,
+        exc_type: Type[BaseException],
+        exc_val: BaseException,
+        exc_tb: TracebackType,
+    ) -> None:
+        self._do_exit(exc_type)
+
+    @property
+    def expired(self) -> bool:
+        return self._cancelled
+
+    @property
+    def remaining(self) -> Optional[float]:
+        if self._cancel_at is not None:
+            return max(self._cancel_at - self._loop.time(), 0.0)
+        else:
+            return None
+
+    def _do_enter(self) -> "timeout":
+        # Support Tornado 5- without timeout
+        # Details: https://github.com/python/asyncio/issues/392
+        if self._timeout is None:
+            return self
+
+        self._task = asyncio.current_task(self._loop)
+        if self._task is None:
+            raise RuntimeError(
+                "Timeout context manager should be used " "inside a task"
+            )
+
+        if self._timeout <= 0:
+            self._loop.call_soon(self._cancel_task)
+            return self
+
+        self._cancel_at = self._loop.time() + self._timeout
+        self._cancel_handler = self._loop.call_at(self._cancel_at, self._cancel_task)
+        return self
+
+    def _do_exit(self, exc_type: Type[BaseException]) -> None:
+        if exc_type is asyncio.CancelledError and self._cancelled:
+            self._cancel_handler = None
+            self._task = None
+            raise asyncio.TimeoutError
+        if self._timeout is not None and self._cancel_handler is not None:
+            self._cancel_handler.cancel()
+            self._cancel_handler = None
+        self._task = None
+        return None
+
+    def _cancel_task(self) -> None:
+        if self._task is not None:
+            self._task.cancel()
+            self._cancelled = True

.venv/lib/python3.12/site-packages/asgiref/typing.py

@@ -0,0 +1,278 @@
+import sys
+from typing import (
+    Any,
+    Awaitable,
+    Callable,
+    Dict,
+    Iterable,
+    Literal,
+    Optional,
+    Protocol,
+    Tuple,
+    Type,
+    TypedDict,
+    Union,
+)
+
+if sys.version_info >= (3, 11):
+    from typing import NotRequired
+else:
+    from typing_extensions import NotRequired
+
+__all__ = (
+    "ASGIVersions",
+    "HTTPScope",
+    "WebSocketScope",
+    "LifespanScope",
+    "WWWScope",
+    "Scope",
+    "HTTPRequestEvent",
+    "HTTPResponseStartEvent",
+    "HTTPResponseBodyEvent",
+    "HTTPResponseTrailersEvent",
+    "HTTPResponsePathsendEvent",
+    "HTTPServerPushEvent",
+    "HTTPDisconnectEvent",
+    "WebSocketConnectEvent",
+    "WebSocketAcceptEvent",
+    "WebSocketReceiveEvent",
+    "WebSocketSendEvent",
+    "WebSocketResponseStartEvent",
+    "WebSocketResponseBodyEvent",
+    "WebSocketDisconnectEvent",
+    "WebSocketCloseEvent",
+    "LifespanStartupEvent",
+    "LifespanShutdownEvent",
+    "LifespanStartupCompleteEvent",
+    "LifespanStartupFailedEvent",
+    "LifespanShutdownCompleteEvent",
+    "LifespanShutdownFailedEvent",
+    "ASGIReceiveEvent",
+    "ASGISendEvent",
+    "ASGIReceiveCallable",
+    "ASGISendCallable",
+    "ASGI2Protocol",
+    "ASGI2Application",
+    "ASGI3Application",
+    "ASGIApplication",
+)
+
+
+class ASGIVersions(TypedDict):
+    spec_version: str
+    version: Union[Literal["2.0"], Literal["3.0"]]
+
+
+class HTTPScope(TypedDict):
+    type: Literal["http"]
+    asgi: ASGIVersions
+    http_version: str
+    method: str
+    scheme: str
+    path: str
+    raw_path: bytes
+    query_string: bytes
+    root_path: str
+    headers: Iterable[Tuple[bytes, bytes]]
+    client: Optional[Tuple[str, int]]
+    server: Optional[Tuple[str, Optional[int]]]
+    state: NotRequired[Dict[str, Any]]
+    extensions: Optional[Dict[str, Dict[object, object]]]
+
+
+class WebSocketScope(TypedDict):
+    type: Literal["websocket"]
+    asgi: ASGIVersions
+    http_version: str
+    scheme: str
+    path: str
+    raw_path: bytes
+    query_string: bytes
+    root_path: str
+    headers: Iterable[Tuple[bytes, bytes]]
+    client: Optional[Tuple[str, int]]
+    server: Optional[Tuple[str, Optional[int]]]
+    subprotocols: Iterable[str]
+    state: NotRequired[Dict[str, Any]]
+    extensions: Optional[Dict[str, Dict[object, object]]]
+
+
+class LifespanScope(TypedDict):
+    type: Literal["lifespan"]
+    asgi: ASGIVersions
+    state: NotRequired[Dict[str, Any]]
+
+
+WWWScope = Union[HTTPScope, WebSocketScope]
+Scope = Union[HTTPScope, WebSocketScope, LifespanScope]
+
+
+class HTTPRequestEvent(TypedDict):
+    type: Literal["http.request"]
+    body: bytes
+    more_body: bool
+
+
+class HTTPResponseDebugEvent(TypedDict):
+    type: Literal["http.response.debug"]
+    info: Dict[str, object]
+
+
+class HTTPResponseStartEvent(TypedDict):
+    type: Literal["http.response.start"]
+    status: int
+    headers: Iterable[Tuple[bytes, bytes]]
+    trailers: bool
+
+
+class HTTPResponseBodyEvent(TypedDict):
+    type: Literal["http.response.body"]
+    body: bytes
+    more_body: bool
+
+
+class HTTPResponseTrailersEvent(TypedDict):
+    type: Literal["http.response.trailers"]
+    headers: Iterable[Tuple[bytes, bytes]]
+    more_trailers: bool
+
+
+class HTTPResponsePathsendEvent(TypedDict):
+    type: Literal["http.response.pathsend"]
+    path: str
+
+
+class HTTPServerPushEvent(TypedDict):
+    type: Literal["http.response.push"]
+    path: str
+    headers: Iterable[Tuple[bytes, bytes]]
+
+
+class HTTPDisconnectEvent(TypedDict):
+    type: Literal["http.disconnect"]
+
+
+class WebSocketConnectEvent(TypedDict):
+    type: Literal["websocket.connect"]
+
+
+class WebSocketAcceptEvent(TypedDict):
+    type: Literal["websocket.accept"]
+    subprotocol: Optional[str]
+    headers: Iterable[Tuple[bytes, bytes]]
+
+
+class WebSocketReceiveEvent(TypedDict):
+    type: Literal["websocket.receive"]
+    bytes: Optional[bytes]
+    text: Optional[str]
+
+
+class WebSocketSendEvent(TypedDict):
+    type: Literal["websocket.send"]
+    bytes: Optional[bytes]
+    text: Optional[str]
+
+
+class WebSocketResponseStartEvent(TypedDict):
+    type: Literal["websocket.http.response.start"]
+    status: int
+    headers: Iterable[Tuple[bytes, bytes]]
+
+
+class WebSocketResponseBodyEvent(TypedDict):
+    type: Literal["websocket.http.response.body"]
+    body: bytes
+    more_body: bool
+
+
+class WebSocketDisconnectEvent(TypedDict):
+    type: Literal["websocket.disconnect"]
+    code: int
+
+
+class WebSocketCloseEvent(TypedDict):
+    type: Literal["websocket.close"]
+    code: int
+    reason: Optional[str]
+
+
+class LifespanStartupEvent(TypedDict):
+    type: Literal["lifespan.startup"]
+
+
+class LifespanShutdownEvent(TypedDict):
+    type: Literal["lifespan.shutdown"]
+
+
+class LifespanStartupCompleteEvent(TypedDict):
+    type: Literal["lifespan.startup.complete"]
+
+
+class LifespanStartupFailedEvent(TypedDict):
+    type: Literal["lifespan.startup.failed"]
+    message: str
+
+
+class LifespanShutdownCompleteEvent(TypedDict):
+    type: Literal["lifespan.shutdown.complete"]
+
+
+class LifespanShutdownFailedEvent(TypedDict):
+    type: Literal["lifespan.shutdown.failed"]
+    message: str
+
+
+ASGIReceiveEvent = Union[
+    HTTPRequestEvent,
+    HTTPDisconnectEvent,
+    WebSocketConnectEvent,
+    WebSocketReceiveEvent,
+    WebSocketDisconnectEvent,
+    LifespanStartupEvent,
+    LifespanShutdownEvent,
+]
+
+
+ASGISendEvent = Union[
+    HTTPResponseStartEvent,
+    HTTPResponseBodyEvent,
+    HTTPResponseTrailersEvent,
+    HTTPServerPushEvent,
+    HTTPDisconnectEvent,
+    WebSocketAcceptEvent,
+    WebSocketSendEvent,
+    WebSocketResponseStartEvent,
+    WebSocketResponseBodyEvent,
+    WebSocketCloseEvent,
+    LifespanStartupCompleteEvent,
+    LifespanStartupFailedEvent,
+    LifespanShutdownCompleteEvent,
+    LifespanShutdownFailedEvent,
+]
+
+
+ASGIReceiveCallable = Callable[[], Awaitable[ASGIReceiveEvent]]
+ASGISendCallable = Callable[[ASGISendEvent], Awaitable[None]]
+
+
+class ASGI2Protocol(Protocol):
+    def __init__(self, scope: Scope) -> None:
+        ...
+
+    async def __call__(
+        self, receive: ASGIReceiveCallable, send: ASGISendCallable
+    ) -> None:
+        ...
+
+
+ASGI2Application = Type[ASGI2Protocol]
+ASGI3Application = Callable[
+    [
+        Scope,
+        ASGIReceiveCallable,
+        ASGISendCallable,
+    ],
+    Awaitable[None],
+]
+ASGIApplication = Union[ASGI2Application, ASGI3Application]

.venv/lib/python3.12/site-packages/asgiref/wsgi.py

@@ -0,0 +1,166 @@
+from io import BytesIO
+from tempfile import SpooledTemporaryFile
+
+from asgiref.sync import AsyncToSync, sync_to_async
+
+
+class WsgiToAsgi:
+    """
+    Wraps a WSGI application to make it into an ASGI application.
+    """
+
+    def __init__(self, wsgi_application):
+        self.wsgi_application = wsgi_application
+
+    async def __call__(self, scope, receive, send):
+        """
+        ASGI application instantiation point.
+        We return a new WsgiToAsgiInstance here with the WSGI app
+        and the scope, ready to respond when it is __call__ed.
+        """
+        await WsgiToAsgiInstance(self.wsgi_application)(scope, receive, send)
+
+
+class WsgiToAsgiInstance:
+    """
+    Per-socket instance of a wrapped WSGI application
+    """
+
+    def __init__(self, wsgi_application):
+        self.wsgi_application = wsgi_application
+        self.response_started = False
+        self.response_content_length = None
+
+    async def __call__(self, scope, receive, send):
+        if scope["type"] != "http":
+            raise ValueError("WSGI wrapper received a non-HTTP scope")
+        self.scope = scope
+        with SpooledTemporaryFile(max_size=65536) as body:
+            # Alright, wait for the http.request messages
+            while True:
+                message = await receive()
+                if message["type"] != "http.request":
+                    raise ValueError("WSGI wrapper received a non-HTTP-request message")
+                body.write(message.get("body", b""))
+                if not message.get("more_body"):
+                    break
+            body.seek(0)
+            # Wrap send so it can be called from the subthread
+            self.sync_send = AsyncToSync(send)
+            # Call the WSGI app
+            await self.run_wsgi_app(body)
+
+    def build_environ(self, scope, body):
+        """
+        Builds a scope and request body into a WSGI environ object.
+        """
+        script_name = scope.get("root_path", "").encode("utf8").decode("latin1")
+        path_info = scope["path"].encode("utf8").decode("latin1")
+        if path_info.startswith(script_name):
+            path_info = path_info[len(script_name) :]
+        environ = {
+            "REQUEST_METHOD": scope["method"],
+            "SCRIPT_NAME": script_name,
+            "PATH_INFO": path_info,
+            "QUERY_STRING": scope["query_string"].decode("ascii"),
+            "SERVER_PROTOCOL": "HTTP/%s" % scope["http_version"],
+            "wsgi.version": (1, 0),
+            "wsgi.url_scheme": scope.get("scheme", "http"),
+            "wsgi.input": body,
+            "wsgi.errors": BytesIO(),
+            "wsgi.multithread": True,
+            "wsgi.multiprocess": True,
+            "wsgi.run_once": False,
+        }
+        # Get server name and port - required in WSGI, not in ASGI
+        if "server" in scope:
+            environ["SERVER_NAME"] = scope["server"][0]
+            environ["SERVER_PORT"] = str(scope["server"][1])
+        else:
+            environ["SERVER_NAME"] = "localhost"
+            environ["SERVER_PORT"] = "80"
+
+        if scope.get("client") is not None:
+            environ["REMOTE_ADDR"] = scope["client"][0]
+
+        # Go through headers and make them into environ entries
+        for name, value in self.scope.get("headers", []):
+            name = name.decode("latin1")
+            if name == "content-length":
+                corrected_name = "CONTENT_LENGTH"
+            elif name == "content-type":
+                corrected_name = "CONTENT_TYPE"
+            else:
+                corrected_name = "HTTP_%s" % name.upper().replace("-", "_")
+            # HTTPbis say only ASCII chars are allowed in headers, but we latin1 just in case
+            value = value.decode("latin1")
+            if corrected_name in environ:
+                value = environ[corrected_name] + "," + value
+            environ[corrected_name] = value
+        return environ
+
+    def start_response(self, status, response_headers, exc_info=None):
+        """
+        WSGI start_response callable.
+        """
+        # Don't allow re-calling once response has begun
+        if self.response_started:
+            raise exc_info[1].with_traceback(exc_info[2])
+        # Don't allow re-calling without exc_info
+        if hasattr(self, "response_start") and exc_info is None:
+            raise ValueError(
+                "You cannot call start_response a second time without exc_info"
+            )
+        # Extract status code
+        status_code, _ = status.split(" ", 1)
+        status_code = int(status_code)
+        # Extract headers
+        headers = [
+            (name.lower().encode("ascii"), value.encode("ascii"))
+            for name, value in response_headers
+        ]
+        # Extract content-length
+        self.response_content_length = None
+        for name, value in response_headers:
+            if name.lower() == "content-length":
+                self.response_content_length = int(value)
+        # Build and send response start message.
+        self.response_start = {
+            "type": "http.response.start",
+            "status": status_code,
+            "headers": headers,
+        }
+
+    @sync_to_async
+    def run_wsgi_app(self, body):
+        """
+        Called in a subthread to run the WSGI app. We encapsulate like
+        this so that the start_response callable is called in the same thread.
+        """
+        # Translate the scope and incoming request body into a WSGI environ
+        environ = self.build_environ(self.scope, body)
+        # Run the WSGI app
+        bytes_sent = 0
+        for output in self.wsgi_application(environ, self.start_response):
+            # If this is the first response, include the response headers
+            if not self.response_started:
+                self.response_started = True
+                self.sync_send(self.response_start)
+            # If the application supplies a Content-Length header
+            if self.response_content_length is not None:
+                # The server should not transmit more bytes to the client than the header allows
+                bytes_allowed = self.response_content_length - bytes_sent
+                if len(output) > bytes_allowed:
+                    output = output[:bytes_allowed]
+            self.sync_send(
+                {"type": "http.response.body", "body": output, "more_body": True}
+            )
+            bytes_sent += len(output)
+            # The server should stop iterating over the response when enough data has been sent
+            if bytes_sent == self.response_content_length:
+                break
+        # Close connection
+        if not self.response_started:
+            self.response_started = True
+            self.sync_send(self.response_start)
+        self.sync_send({"type": "http.response.body"})