prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  sync_and_async_middleware throws exception
  Which SDK and version?
  sentry_sdk==0.20.0
  uvicorn==0.13.3
  gunicorn==20.0.4
  django==3.1.6
  
  ### Steps to Reproduce
  
  copy the middleware example from django [docs](https://docs.djangoproject.com/en/dev/topics/http/middleware/#asynchronous-support):
  ```
  import asyncio
  from django.utils.decorators import sync_and_async_middleware
  
  @sync_and_async_middleware
  def simple_middleware(get_response):
      # One-time configuration and initialization goes here.
      if asyncio.iscoroutinefunction(get_response):
          async def middleware(request):
              # Do something here!
              response = await get_response(request)
              return response
  
      else:
          def middleware(request):
              # Do something here!
              response = get_response(request)
              return response
  
      return middleware
  ```
  Run django async
  ```
  uvicorn.run(
          "apps.asgi:application",
          host="0.0.0.0", port=8000, lifespan='off', loop='asyncio', reload=True,
          ...
      )
  ```
  
  ### Actual Result
  ```
  ...
  File "/usr/local/lib/python3.8/dist-packages/sentry_sdk/integrations/django/asgi.py
  Exception Value: 'function' object has no attribute '__acall__'
  ```
  
  The problem is, that the decorator style has no `__acall__` and the middleware is a function (not a class)
  
  No problems in 0.19.x
  This bug was introduced with this PR https://github.com/getsentry/sentry-python/pull/992
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `sentry_sdk/integrations/django/asgi.py`
  Content:
  ```
  1 """
  2 Instrumentation for Django 3.0
  3 
  4 Since this file contains `async def` it is conditionally imported in
  5 `sentry_sdk.integrations.django` (depending on the existence of
  6 `django.core.handlers.asgi`.
  7 """
  8 
  9 import asyncio
  10 
  11 from sentry_sdk import Hub, _functools
  12 from sentry_sdk._types import MYPY
  13 
  14 from sentry_sdk.integrations.asgi import SentryAsgiMiddleware
  15 
  16 if MYPY:
  17     from typing import Any
  18     from typing import Union
  19     from typing import Callable
  20 
  21     from django.http.response import HttpResponse
  22 
  23 
  24 def patch_django_asgi_handler_impl(cls):
  25     # type: (Any) -> None
  26 
  27     from sentry_sdk.integrations.django import DjangoIntegration
  28 
  29     old_app = cls.__call__
  30 
  31     async def sentry_patched_asgi_handler(self, scope, receive, send):
  32         # type: (Any, Any, Any, Any) -> Any
  33         if Hub.current.get_integration(DjangoIntegration) is None:
  34             return await old_app(self, scope, receive, send)
  35 
  36         middleware = SentryAsgiMiddleware(
  37             old_app.__get__(self, cls), unsafe_context_data=True
  38         )._run_asgi3
  39         return await middleware(scope, receive, send)
  40 
  41     cls.__call__ = sentry_patched_asgi_handler
  42 
  43 
  44 def patch_get_response_async(cls, _before_get_response):
  45     # type: (Any, Any) -> None
  46     old_get_response_async = cls.get_response_async
  47 
  48     async def sentry_patched_get_response_async(self, request):
  49         # type: (Any, Any) -> Union[HttpResponse, BaseException]
  50         _before_get_response(request)
  51         return await old_get_response_async(self, request)
  52 
  53     cls.get_response_async = sentry_patched_get_response_async
  54 
  55 
  56 def patch_channels_asgi_handler_impl(cls):
  57     # type: (Any) -> None
  58 
  59     import channels  # type: ignore
  60     from sentry_sdk.integrations.django import DjangoIntegration
  61 
  62     if channels.__version__ < "3.0.0":
  63 
  64         old_app = cls.__call__
  65 
  66         async def sentry_patched_asgi_handler(self, receive, send):
  67             # type: (Any, Any, Any) -> Any
  68             if Hub.current.get_integration(DjangoIntegration) is None:
  69                 return await old_app(self, receive, send)
  70 
  71             middleware = SentryAsgiMiddleware(
  72                 lambda _scope: old_app.__get__(self, cls), unsafe_context_data=True
  73             )
  74 
  75             return await middleware(self.scope)(receive, send)
  76 
  77         cls.__call__ = sentry_patched_asgi_handler
  78 
  79     else:
  80         # The ASGI handler in Channels >= 3 has the same signature as
  81         # the Django handler.
  82         patch_django_asgi_handler_impl(cls)
  83 
  84 
  85 def wrap_async_view(hub, callback):
  86     # type: (Hub, Any) -> Any
  87     @_functools.wraps(callback)
  88     async def sentry_wrapped_callback(request, *args, **kwargs):
  89         # type: (Any, *Any, **Any) -> Any
  90 
  91         with hub.start_span(
  92             op="django.view", description=request.resolver_match.view_name
  93         ):
  94             return await callback(request, *args, **kwargs)
  95 
  96     return sentry_wrapped_callback
  97 
  98 
  99 def _asgi_middleware_mixin_factory(_check_middleware_span):
  100     # type: (Callable[..., Any]) -> Any
  101     """
  102     Mixin class factory that generates a middleware mixin for handling requests
  103     in async mode.
  104     """
  105 
  106     class SentryASGIMixin:
  107         def __init__(self, get_response):
  108             # type: (Callable[..., Any]) -> None
  109             self.get_response = get_response
  110             self._acall_method = None
  111             self._async_check()
  112 
  113         def _async_check(self):
  114             # type: () -> None
  115             """
  116             If get_response is a coroutine function, turns us into async mode so
  117             a thread is not consumed during a whole request.
  118             Taken from django.utils.deprecation::MiddlewareMixin._async_check
  119             """
  120             if asyncio.iscoroutinefunction(self.get_response):
  121                 self._is_coroutine = asyncio.coroutines._is_coroutine  # type: ignore
  122 
  123         def async_route_check(self):
  124             # type: () -> bool
  125             """
  126             Function that checks if we are in async mode,
  127             and if we are forwards the handling of requests to __acall__
  128             """
  129             return asyncio.iscoroutinefunction(self.get_response)
  130 
  131         async def __acall__(self, *args, **kwargs):
  132             # type: (*Any, **Any) -> Any
  133             f = self._acall_method
  134             if f is None:
  135                 self._acall_method = f = self._inner.__acall__  # type: ignore
  136 
  137             middleware_span = _check_middleware_span(old_method=f)
  138 
  139             if middleware_span is None:
  140                 return await f(*args, **kwargs)
  141 
  142             with middleware_span:
  143                 return await f(*args, **kwargs)
  144 
  145     return SentryASGIMixin
  146
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/sentry_sdk/integrations/django/asgi.py b/sentry_sdk/integrations/django/asgi.py
  --- a/sentry_sdk/integrations/django/asgi.py
  +++ b/sentry_sdk/integrations/django/asgi.py
  @@ -104,6 +104,9 @@
       """
   
       class SentryASGIMixin:
  +        if MYPY:
  +            _inner = None
  +
           def __init__(self, get_response):
               # type: (Callable[..., Any]) -> None
               self.get_response = get_response
  @@ -132,7 +135,10 @@
               # type: (*Any, **Any) -> Any
               f = self._acall_method
               if f is None:
  -                self._acall_method = f = self._inner.__acall__  # type: ignore
  +                if hasattr(self._inner, "__acall__"):
  +                    self._acall_method = f = self._inner.__acall__  # type: ignore
  +                else:
  +                    self._acall_method = f = self._inner
   
               middleware_span = _check_middleware_span(old_method=f)
  
verification_info: {"golden_diff": "diff --git a/sentry_sdk/integrations/django/asgi.py b/sentry_sdk/integrations/django/asgi.py\n--- a/sentry_sdk/integrations/django/asgi.py\n+++ b/sentry_sdk/integrations/django/asgi.py\n@@ -104,6 +104,9 @@\n     \"\"\"\n \n     class SentryASGIMixin:\n+        if MYPY:\n+            _inner = None\n+\n         def __init__(self, get_response):\n             # type: (Callable[..., Any]) -> None\n             self.get_response = get_response\n@@ -132,7 +135,10 @@\n             # type: (*Any, **Any) -> Any\n             f = self._acall_method\n             if f is None:\n-                self._acall_method = f = self._inner.__acall__  # type: ignore\n+                if hasattr(self._inner, \"__acall__\"):\n+                    self._acall_method = f = self._inner.__acall__  # type: ignore\n+                else:\n+                    self._acall_method = f = self._inner\n \n             middleware_span = _check_middleware_span(old_method=f)\n", "issue": "sync_and_async_middleware throws exception\nWhich SDK and version?\r\nsentry_sdk==0.20.0\r\nuvicorn==0.13.3\r\ngunicorn==20.0.4\r\ndjango==3.1.6\r\n\r\n### Steps to Reproduce\r\n\r\ncopy the middleware example from django [docs](https://docs.djangoproject.com/en/dev/topics/http/middleware/#asynchronous-support):\r\n```\r\nimport asyncio\r\nfrom django.utils.decorators import sync_and_async_middleware\r\n\r\n@sync_and_async_middleware\r\ndef simple_middleware(get_response):\r\n    # One-time configuration and initialization goes here.\r\n    if asyncio.iscoroutinefunction(get_response):\r\n        async def middleware(request):\r\n            # Do something here!\r\n            response = await get_response(request)\r\n            return response\r\n\r\n    else:\r\n        def middleware(request):\r\n            # Do something here!\r\n            response = get_response(request)\r\n            return response\r\n\r\n    return middleware\r\n```\r\nRun django async\r\n```\r\nuvicorn.run(\r\n        \"apps.asgi:application\",\r\n        host=\"0.0.0.0\", port=8000, lifespan='off', loop='asyncio', reload=True,\r\n        ...\r\n    )\r\n```\r\n\r\n### Actual Result\r\n```\r\n...\r\nFile \"/usr/local/lib/python3.8/dist-packages/sentry_sdk/integrations/django/asgi.py\r\nException Value: 'function' object has no attribute '__acall__'\r\n```\r\n\r\nThe problem is, that the decorator style has no `__acall__` and the middleware is a function (not a class)\r\n\r\nNo problems in 0.19.x\r\nThis bug was introduced with this PR https://github.com/getsentry/sentry-python/pull/992\n", "before_files": [{"content": "\"\"\"\nInstrumentation for Django 3.0\n\nSince this file contains `async def` it is conditionally imported in\n`sentry_sdk.integrations.django` (depending on the existence of\n`django.core.handlers.asgi`.\n\"\"\"\n\nimport asyncio\n\nfrom sentry_sdk import Hub, _functools\nfrom sentry_sdk._types import MYPY\n\nfrom sentry_sdk.integrations.asgi import SentryAsgiMiddleware\n\nif MYPY:\n    from typing import Any\n    from typing import Union\n    from typing import Callable\n\n    from django.http.response import HttpResponse\n\n\ndef patch_django_asgi_handler_impl(cls):\n    # type: (Any) -> None\n\n    from sentry_sdk.integrations.django import DjangoIntegration\n\n    old_app = cls.__call__\n\n    async def sentry_patched_asgi_handler(self, scope, receive, send):\n        # type: (Any, Any, Any, Any) -> Any\n        if Hub.current.get_integration(DjangoIntegration) is None:\n            return await old_app(self, scope, receive, send)\n\n        middleware = SentryAsgiMiddleware(\n            old_app.__get__(self, cls), unsafe_context_data=True\n        )._run_asgi3\n        return await middleware(scope, receive, send)\n\n    cls.__call__ = sentry_patched_asgi_handler\n\n\ndef patch_get_response_async(cls, _before_get_response):\n    # type: (Any, Any) -> None\n    old_get_response_async = cls.get_response_async\n\n    async def sentry_patched_get_response_async(self, request):\n        # type: (Any, Any) -> Union[HttpResponse, BaseException]\n        _before_get_response(request)\n        return await old_get_response_async(self, request)\n\n    cls.get_response_async = sentry_patched_get_response_async\n\n\ndef patch_channels_asgi_handler_impl(cls):\n    # type: (Any) -> None\n\n    import channels  # type: ignore\n    from sentry_sdk.integrations.django import DjangoIntegration\n\n    if channels.__version__ < \"3.0.0\":\n\n        old_app = cls.__call__\n\n        async def sentry_patched_asgi_handler(self, receive, send):\n            # type: (Any, Any, Any) -> Any\n            if Hub.current.get_integration(DjangoIntegration) is None:\n                return await old_app(self, receive, send)\n\n            middleware = SentryAsgiMiddleware(\n                lambda _scope: old_app.__get__(self, cls), unsafe_context_data=True\n            )\n\n            return await middleware(self.scope)(receive, send)\n\n        cls.__call__ = sentry_patched_asgi_handler\n\n    else:\n        # The ASGI handler in Channels >= 3 has the same signature as\n        # the Django handler.\n        patch_django_asgi_handler_impl(cls)\n\n\ndef wrap_async_view(hub, callback):\n    # type: (Hub, Any) -> Any\n    @_functools.wraps(callback)\n    async def sentry_wrapped_callback(request, *args, **kwargs):\n        # type: (Any, *Any, **Any) -> Any\n\n        with hub.start_span(\n            op=\"django.view\", description=request.resolver_match.view_name\n        ):\n            return await callback(request, *args, **kwargs)\n\n    return sentry_wrapped_callback\n\n\ndef _asgi_middleware_mixin_factory(_check_middleware_span):\n    # type: (Callable[..., Any]) -> Any\n    \"\"\"\n    Mixin class factory that generates a middleware mixin for handling requests\n    in async mode.\n    \"\"\"\n\n    class SentryASGIMixin:\n        def __init__(self, get_response):\n            # type: (Callable[..., Any]) -> None\n            self.get_response = get_response\n            self._acall_method = None\n            self._async_check()\n\n        def _async_check(self):\n            # type: () -> None\n            \"\"\"\n            If get_response is a coroutine function, turns us into async mode so\n            a thread is not consumed during a whole request.\n            Taken from django.utils.deprecation::MiddlewareMixin._async_check\n            \"\"\"\n            if asyncio.iscoroutinefunction(self.get_response):\n                self._is_coroutine = asyncio.coroutines._is_coroutine  # type: ignore\n\n        def async_route_check(self):\n            # type: () -> bool\n            \"\"\"\n            Function that checks if we are in async mode,\n            and if we are forwards the handling of requests to __acall__\n            \"\"\"\n            return asyncio.iscoroutinefunction(self.get_response)\n\n        async def __acall__(self, *args, **kwargs):\n            # type: (*Any, **Any) -> Any\n            f = self._acall_method\n            if f is None:\n                self._acall_method = f = self._inner.__acall__  # type: ignore\n\n            middleware_span = _check_middleware_span(old_method=f)\n\n            if middleware_span is None:\n                return await f(*args, **kwargs)\n\n            with middleware_span:\n                return await f(*args, **kwargs)\n\n    return SentryASGIMixin\n", "path": "sentry_sdk/integrations/django/asgi.py"}], "after_files": [{"content": "\"\"\"\nInstrumentation for Django 3.0\n\nSince this file contains `async def` it is conditionally imported in\n`sentry_sdk.integrations.django` (depending on the existence of\n`django.core.handlers.asgi`.\n\"\"\"\n\nimport asyncio\n\nfrom sentry_sdk import Hub, _functools\nfrom sentry_sdk._types import MYPY\n\nfrom sentry_sdk.integrations.asgi import SentryAsgiMiddleware\n\nif MYPY:\n    from typing import Any\n    from typing import Union\n    from typing import Callable\n\n    from django.http.response import HttpResponse\n\n\ndef patch_django_asgi_handler_impl(cls):\n    # type: (Any) -> None\n\n    from sentry_sdk.integrations.django import DjangoIntegration\n\n    old_app = cls.__call__\n\n    async def sentry_patched_asgi_handler(self, scope, receive, send):\n        # type: (Any, Any, Any, Any) -> Any\n        if Hub.current.get_integration(DjangoIntegration) is None:\n            return await old_app(self, scope, receive, send)\n\n        middleware = SentryAsgiMiddleware(\n            old_app.__get__(self, cls), unsafe_context_data=True\n        )._run_asgi3\n        return await middleware(scope, receive, send)\n\n    cls.__call__ = sentry_patched_asgi_handler\n\n\ndef patch_get_response_async(cls, _before_get_response):\n    # type: (Any, Any) -> None\n    old_get_response_async = cls.get_response_async\n\n    async def sentry_patched_get_response_async(self, request):\n        # type: (Any, Any) -> Union[HttpResponse, BaseException]\n        _before_get_response(request)\n        return await old_get_response_async(self, request)\n\n    cls.get_response_async = sentry_patched_get_response_async\n\n\ndef patch_channels_asgi_handler_impl(cls):\n    # type: (Any) -> None\n\n    import channels  # type: ignore\n    from sentry_sdk.integrations.django import DjangoIntegration\n\n    if channels.__version__ < \"3.0.0\":\n\n        old_app = cls.__call__\n\n        async def sentry_patched_asgi_handler(self, receive, send):\n            # type: (Any, Any, Any) -> Any\n            if Hub.current.get_integration(DjangoIntegration) is None:\n                return await old_app(self, receive, send)\n\n            middleware = SentryAsgiMiddleware(\n                lambda _scope: old_app.__get__(self, cls), unsafe_context_data=True\n            )\n\n            return await middleware(self.scope)(receive, send)\n\n        cls.__call__ = sentry_patched_asgi_handler\n\n    else:\n        # The ASGI handler in Channels >= 3 has the same signature as\n        # the Django handler.\n        patch_django_asgi_handler_impl(cls)\n\n\ndef wrap_async_view(hub, callback):\n    # type: (Hub, Any) -> Any\n    @_functools.wraps(callback)\n    async def sentry_wrapped_callback(request, *args, **kwargs):\n        # type: (Any, *Any, **Any) -> Any\n\n        with hub.start_span(\n            op=\"django.view\", description=request.resolver_match.view_name\n        ):\n            return await callback(request, *args, **kwargs)\n\n    return sentry_wrapped_callback\n\n\ndef _asgi_middleware_mixin_factory(_check_middleware_span):\n    # type: (Callable[..., Any]) -> Any\n    \"\"\"\n    Mixin class factory that generates a middleware mixin for handling requests\n    in async mode.\n    \"\"\"\n\n    class SentryASGIMixin:\n        if MYPY:\n            _inner = None\n\n        def __init__(self, get_response):\n            # type: (Callable[..., Any]) -> None\n            self.get_response = get_response\n            self._acall_method = None\n            self._async_check()\n\n        def _async_check(self):\n            # type: () -> None\n            \"\"\"\n            If get_response is a coroutine function, turns us into async mode so\n            a thread is not consumed during a whole request.\n            Taken from django.utils.deprecation::MiddlewareMixin._async_check\n            \"\"\"\n            if asyncio.iscoroutinefunction(self.get_response):\n                self._is_coroutine = asyncio.coroutines._is_coroutine  # type: ignore\n\n        def async_route_check(self):\n            # type: () -> bool\n            \"\"\"\n            Function that checks if we are in async mode,\n            and if we are forwards the handling of requests to __acall__\n            \"\"\"\n            return asyncio.iscoroutinefunction(self.get_response)\n\n        async def __acall__(self, *args, **kwargs):\n            # type: (*Any, **Any) -> Any\n            f = self._acall_method\n            if f is None:\n                if hasattr(self._inner, \"__acall__\"):\n                    self._acall_method = f = self._inner.__acall__  # type: ignore\n                else:\n                    self._acall_method = f = self._inner\n\n            middleware_span = _check_middleware_span(old_method=f)\n\n            if middleware_span is None:\n                return await f(*args, **kwargs)\n\n            with middleware_span:\n                return await f(*args, **kwargs)\n\n    return SentryASGIMixin\n", "path": "sentry_sdk/integrations/django/asgi.py"}]}