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Version 1.0.0 #2384
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Version 1.0.0 #2384
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from typing_extensions import ParamSpec | ||
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from starlette.datastructures import State, URLPath | ||
from starlette.middleware import Middleware, _MiddlewareClass | ||
from starlette.middleware.base import BaseHTTPMiddleware | ||
from starlette.middleware.errors import ServerErrorMiddleware | ||
from starlette.middleware.exceptions import ExceptionMiddleware |
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We need to remove ExceptionMiddleware from here. And maybe delete that file as well.
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Where should we register the starlette.exception_handlers
now?
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Sorry, I guess we need to get rid of is this part:
await wrap_app_handling_exceptions(self.app, conn)(scope, receive, send) |
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Ah! Just to confirm: you mean that the ExceptionMiddleware
should just register the exception_handlers
in the scope, but the wrap_app_handling_exceptions
should NOT be called there, only on the other places we have them (request_response
and websocket_session
). Correct?
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Yep!
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I cannot come up with a solution for this, FYI.
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@adriangb how do you want to proceed here? We talked in PyCon US a bit, but I don't recall how we left this.
This is the only blocker for 1.0.
The only thing is that I don't want to add any breaking change.
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If you want to do this without any breaking change we can just leave ExceptionMiddleware
where it is and ignore this thread.
But conceptually I think the thing is that:
- After routing once we have a Request/Response exception handling can be done via a Request/Response (the current API).
- Outside of that (e.g. in other middleware or routing) we're in pure ASGI land. We could still let you catch
HTTPException
's but I think the API should essentially be an ASGI appHTTPException | int, Scope, Receive, Send
or something like that. But that would be a breaking change. Otherwise I fear we're going to get bugs like "I wanted to catch the404
HTTPException and log the request body but when I called.body()
I got aStreamConsumed
error".
To do that we'd have to replace ExceptionMiddleware
with AppExceptionMiddleware
or something like that with the new API and have two different arguments to Starlette
for each type of exception handler.
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Leaving the pure ASGI realm, I have a minimalistic and effective design. https://github.com/abersheeran/baize/blob/master/baize/asgi/shortcut.py#L59
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Very nice :)
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Co-authored-by: Adrian Garcia Badaracco <[email protected]> Co-authored-by: Alex Oleshkevich <[email protected]>
I reckon Starlette 1.0 needs a clear resolution to #2673. |
I've tried to be careful on the commit sequence here - each commit passes the pipeline by itself.
httpcore
on Version 1.0 httpcore#809.@encode/maintainers Does someone want to add a breaking change on Starlette before we go to 1.0.0? Please, let's focus on breaking changes, if there are features that can be added on minor, let's not bother with them here.