JSONRPC over HTTP client invoker (within requests library)

jsonrpc_via_requests.py

import json
import requests
import functools

"""
Example:

cli = jsonrpc('http://rpcserver.com:6666')
try:
    resp = cli.echo(hello='world')
except JSONRPCError as e:
    print repr(e)
"""

class JSONRPCError(Exception):
    pass

class jsonrpc(object):

    def __init__(self, url):
        self.url = url
        pass

    def __getattr__(self, method):
        return functools.partial(jsonrpc.invoke_, self.url, method)

    @staticmethod
    def invoke_(url, method, **params):
        headers = {'Content-Type' : 'application/json' }
        payload = dict(id=1,
                    jsonrpc="2.0",
                    method=method,
                    params=params)
        resp = requests.post(url, data=json.dumps(payload), headers=headers)
        resp = resp.json()
        if 'error' in resp:
            raise JSONRPCError(str(resp['error']))
        return resp['result']