/usr/lib/python2.7/dist-packages/cyclone/jsonrpc.py is in python-cyclone 1.1-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright 2010 Alexandre Fiori
# based on the original Tornado by Facebook
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
"""Server-side implementation of the JSON-RPC protocol.
`JSON-RPC <http://json-rpc.org/wiki/specification>`_ is a lightweight remote
procedure call protocol, designed to be simple.
For more information, check out the `RPC demo
<https://github.com/fiorix/cyclone/tree/master/demos/rpc>`_.
"""
import types
import cyclone.escape
from cyclone.web import HTTPError, RequestHandler
from twisted.internet import defer
from twisted.python import log, failure
class JsonrpcRequestHandler(RequestHandler):
"""Subclass this class and define jsonrpc_* to make a handler.
Example::
class MyRequestHandler(JsonrpcRequestHandler):
def jsonrpc_echo(self, text):
return text
def jsonrpc_sort(self, items):
return sorted(items)
@defer.inlineCallbacks
def jsonrpc_geoip_lookup(self, address):
response = yield cyclone.httpclient.fetch(
"http://freegeoip.net/json/%s" % address.encode("utf-8"))
defer.returnValue(response.body)
"""
def post(self, *args):
self._auto_finish = False
try:
req = cyclone.escape.json_decode(self.request.body)
jsonid = req["id"]
assert isinstance(jsonid, types.IntType), \
"Invalid id type: %s" % type(jsonid)
method = req["method"]
assert isinstance(method, types.StringTypes), \
"Invalid method type: %s" % type(method)
params = req["params"]
assert isinstance(params, (types.ListType, types.TupleType)), \
"Invalid params type: %s" % type(params)
except Exception, e:
log.msg("Bad Request: %s" % str(e))
raise HTTPError(400)
function = getattr(self, "jsonrpc_%s" % method, None)
if callable(function):
args = list(args) + params
d = defer.maybeDeferred(function, *args)
d.addBoth(self._cbResult, jsonid)
else:
self._cbResult(AttributeError("method not found: %s" % method),
jsonid)
def _cbResult(self, result, jsonid):
if isinstance(result, failure.Failure):
error = str(result.value)
result = None
else:
error = None
data = {"result": result, "error": error, "id": jsonid}
self.finish(cyclone.escape.json_encode(data))
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