Tracing JSON objects

[piedenis]

tinyrpc is very nice for abstracting RPC between a Python client and a Python server. It's great because I don't have to care about underlying JSON objects. However, I have to create now a JSON-RPC Python server for a JSON-RPC Java client. For debugging purpose, is it possible to trace the JSON objects received and emitted by tinyrpc? How can I do that?

[lnoor]

I propose to use a DEBUG logging level for that. Strike that, I added a property trace to RPCServer. When it is set to a callable after constructing RPCServer it will get called with three parameters:

• direction: string, either '-->' or '<--' to indicate incoming or outgoing data.
• context: the context returned by `transport.receive_message'
• message: the message string itself.

So your trace code could look like:

def my_trace(direction, context, message):
    logger.debug('%s%s', direction, message)

server = RPCServer(transport, protocol, dispatcher)
server.trace = my_trace
server.serve_forever()