on_headers_prepared Event

Fires when the request headers have been formed and are about to be sent to the server.

Syntax

class HTTPClientHeadersPreparedEventParams(object):

# In class HTTPClient:
@property
def on_headers_prepared() -> Callable[[HTTPClientHeadersPreparedEventParams], None]: ...
@on_headers_prepared.setter
def on_headers_prepared(event_hook: Callable[[HTTPClientHeadersPreparedEventParams], None]) -> None: ...

Remarks

The prepared headers are available in request_headers property. This event provides you the last chance to review/alter them.