opentelemetry-instrumentation-asgi not compatible with starlette/fastapi

[sk-]

When we bumped opentelemetry-instrumentation-asgi to 0.45b0, we got type errors due to the changes introduced by PR #2026.

error: Argument 1 to "add_middleware" of "Starlette" has incompatible type "type[AsgiMiddleware]"; expected "type[_MiddlewareClass[[]]]"  [arg-type]

The problem is that it is specifying the types as dict, whereas Starlette requires MutableMapping. See https://github.com/encode/starlette/blob/9f16bf5c25e126200701f6e04330864f4a91a898/starlette/types.py#L10-L14.

Describe your environment

• Python 3.12
• Fastapi 0.111.0
• Starlette 0.37.2
• opentelemetry-instrumentation-asgi 0.45b0
• Mypy 1.10.0

Steps to reproduce
Describe exactly how to reproduce the error. Include a code sample if applicable.

What is the expected behavior?
It should be possible to add OpentelemetryMiddleware to starlette/fastapi

What is the actual behavior?
Got a type error

[sk-]

Closing as it seems starlette is using broader types than what the spec specifies. See encode/starlette#2040