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JSON or JavaScript Object Notation is a lightweight data-interchange format. It is easy for humans to read and write. It is easy for machines to parse and generate. The RPC call made based on JSON is able to send data in a much compact and efficient manner than the normal XML based RPC call.
The python module jsonrpclib is able to create a simple JSON based server and client.
Example
In the below example we create a simple JSON server and create a function in it. This function breaks a bigger list into smaller lists mentioning the length of the argument as well as the argument itself.
# server program from jsonrpclib.SimpleJSONRPCServer import SimpleJSONRPCServer def findlen(*args): res = [] for arg in args: try: lenval = len(arg) except TypeError: lenval = None res.append((lenval, arg)) return res def main(): server = SimpleJSONRPCServer((''localhost'', 1006)) server.register_function(findlen) print("Start server") server.serve_forever() if __name__ == ''__main__'': main() # Call by client from jsonrpclib import Server def main(): conn = Server(''http://localhost:1006'') print(conn.findlen((''a'',''x'',''d'',''z''), 11, {''Mt. Abu'': 1602, ''Mt. Nanda'': 3001,''Mt. Kirubu'': 102, ''Mt.Nish'': 5710})) if __name__ == ''__main__'': main()
When we run the above program, we get the following output −
[[4, [u''a'', u''x'', u''d'', u''z'']], [None, 11], [4, {u''Mt. Abu'': 1602, u''Mt. Kirubu'': 102, u''Mt. Nanda'': 3001, u''Mt.Nish'': 5710}]]
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