Welcome to JSONRPClib-pelix

This library implements the JSON-RPC 2.0 proposed specification in pure Python. It is designed to be as compatible with the syntax of xmlrpclib as possible (it extends where possible), so that projects using xmlrpclib could easily be modified to use JSON and experiment with the differences.

It is backwards-compatible with the 1.0 specification, and supports all of the new proposed features of 2.0, including:

  • Batch submission (via the MultiCall class)
  • Keyword arguments
  • Notifications (both in a batch and normal)
  • Class translation using the __jsonclass__ key.

A SimpleJSONRPCServer class has been added. It is intended to emulate the SimpleXMLRPCServer from the default Python distribution.

This library is licensed under the terms of the Apache Software License 2.0.


In my opinion, there are several reasons to choose JSON over XML for RPC:

  • Much simpler to read (I suppose this is opinion, but I know I’m right. :)
  • Size / Bandwidth - Main reason, a JSON object representation is just much smaller.
  • Parsing - JSON should be much quicker to parse than XML.
  • Easy class passing with jsonclass (when enabled)

In the interest of being fair, there are also a few reasons to choose XML over JSON:

  • Your server doesn’t do JSON (rather obvious)
  • Wider XML-RPC support across APIs (can we change this? :))
  • Libraries are more established, i.e. more stable (Let’s change this too.)

About this version

This is a patched version of the original jsonrpclib project by Josh Marshall, available at https://github.com/joshmarshall/jsonrpclib.

The suffix -pelix only indicates that this version works with Pelix Remote Services, but it is not a Pelix specific implementation.

  • This version adds support for Python 3, staying compatible with Python 2.7.
  • It is now possible to use the dispatch_method argument while extending the SimpleJSONRPCDispatcher, to use a custom dispatcher. This allows to use this package by Pelix Remote Services.
  • It can use thread pools to control the number of threads spawned to handle notification requests and clients connections.
  • The modifications added in other forks of this project have been added:
  • Since version 0.4, this package added back the support of Unix sockets.
  • This version cannot be installed with the original jsonrpclib, as it uses the same package name.