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.