atul-astronomer opened a new issue, #55176:
URL: https://github.com/apache/airflow/issues/55176
### Apache Airflow version
main (development)
### If "Other Airflow 2 version" selected, which one?
_No response_
### What happened?
```javascript
File "/usr/python/lib/python3.10/site-packages/starlette/applications.py",
line 99, in build_middleware_stack
app = cls(app, *args, **kwargs)
TypeError: 'str' object is not callable
INFO: 127.0.0.1:35798 - "POST /auth/token HTTP/1.1" 500 Internal Server
Error
ERROR: Exception in ASGI application
Traceback (most recent call last):
File
"/usr/python/lib/python3.10/site-packages/uvicorn/protocols/http/httptools_impl.py",
line 409, in run_asgi
result = await app( # type: ignore[func-returns-value]
File "/usr/python/lib/python3.10/site-packages/fastapi/applications.py",
line 1054, in __call__
await super().__call__(scope, receive, send)
File "/usr/python/lib/python3.10/site-packages/starlette/applications.py",
line 112, in __call__
self.middleware_stack = self.build_middleware_stack()
File "/usr/python/lib/python3.10/site-packages/starlette/applications.py",
line 99, in build_middleware_stack
app = cls(app, *args, **kwargs)
TypeError: 'str' object is not callable
INFO: 127.0.0.1:35806 - "POST /auth/token HTTP/1.1" 500 Internal Server
Error
```
<img width="975" height="392" alt="Image"
src="https://github.com/user-attachments/assets/92ee568e-ed69-4ca7-854c-1b13185c6403";
/>
### What you think should happen instead?
_No response_
### How to reproduce
Create below middleware plugin:
```python
from airflow.plugins_manager import AirflowPlugin
from starlette.middleware.base import BaseHTTPMiddleware
class AddHeaderMiddleware(BaseHTTPMiddleware):
async def dispatch(self, request, call_next):
response = await call_next(request)
response.headers["X-Test"] = "true"
return response
class MyMiddlewarePlugin(AirflowPlugin):
name = "my_middleware_plugin"
fastapi_root_middlewares = [
{
"name": "test_header",
"middleware": "AddHeaderMiddleware",
"options": {}
}
]
```
### Operating System
Linux
### Versions of Apache Airflow Providers
_No response_
### Deployment
Official Apache Airflow Helm Chart
### Deployment details
_No response_
### Anything else?
_No response_
### Are you willing to submit PR?
- [ ] Yes I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)
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