pyarrow.flight.ServerMiddlewareFactory#

class pyarrow.flight.ServerMiddlewareFactory#

Bases: _Weakrefable

A factory for new middleware instances.

All middleware methods will be called from the same thread as the RPC method implementation. That is, thread-locals set in the middleware are accessible from the method itself.

__init__(*args, **kwargs)#

Methods

`__init__`(args, *kwargs)
`start_call`(self, info, headers)	Called at the start of an RPC.

start_call(self, info, headers)#

Called at the start of an RPC.

This must be thread-safe.

Parameters:

infoCallInfo: Information about the call.
headersdict: A dictionary of headers from the client. Keys are strings and values are lists of strings (for text headers) or bytes (for binary headers).

Returns:

instanceServerMiddleware: An instance of ServerMiddleware (the instance to use for the call), or None if this call is not intercepted.

Raises:

exceptionpyarrow.ArrowException: If an exception is raised, the call will be rejected with the given error.