xshirax opened a new issue, #45730:
URL: https://github.com/apache/arrow/issues/45730
### Describe the usage question you have. Please include as many useful
details as possible.
hey i want to add additional information to the existing user-agent header
in my http request.
i tried something like that:
```python
import pyarrow.flight as flight
class CustomClientMiddlewareFactory(flight.ClientMiddlewareFactory):
"""Middleware Factory to create middleware instances."""
def start_call(self, info):
return CustomClientMiddleware()
class CustomClientMiddleware(flight.ClientMiddleware):
"""Client Middleware to modify outgoing headers."""
def sending_headers(self):
return {
"user-agent" :"CustomFlightClient/1.0"
}
```
but it did not work, the user-agent header got change in the way to the
server.
it does work to add custom headers, but what i need is to modify the
existing one.
is it possible?
### Component(s)
Python, FlightRPC
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