Version 1.0.0 #2384
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:
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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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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, Sendor something like that. But that would be a breaking change. Otherwise I fear we're going to get bugs like "I wanted to catch the404HTTPException and log the request body but when I called.body()I got aStreamConsumederror".
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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Co-authored-by: Adrian Garcia Badaracco <[email protected]> Co-authored-by: Alex Oleshkevich <[email protected]>
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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.
httpcoreon 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.