mirror of
https://github.com/Sneed-Group/Poodletooth-iLand
synced 2024-12-29 06:32:40 -06:00
556 lines
17 KiB
Python
556 lines
17 KiB
Python
"""
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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============================
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JSONRPC Library (jsonrpclib)
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============================
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This library is a JSON-RPC v.2 (proposed) implementation which
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follows the xmlrpclib API for portability between clients. It
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uses the same Server / ServerProxy, loads, dumps, etc. syntax,
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while providing features not present in XML-RPC like:
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* Keyword arguments
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* Notifications
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* Versioning
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* Batches and batch notifications
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Eventually, I'll add a SimpleXMLRPCServer compatible library,
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and other things to tie the thing off nicely. :)
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For a quick-start, just open a console and type the following,
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replacing the server address, method, and parameters
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appropriately.
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>>> import jsonrpclib
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>>> server = jsonrpclib.Server('http://localhost:8181')
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>>> server.add(5, 6)
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11
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>>> server._notify.add(5, 6)
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>>> batch = jsonrpclib.MultiCall(server)
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>>> batch.add(3, 50)
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>>> batch.add(2, 3)
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>>> batch._notify.add(3, 5)
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>>> batch()
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[53, 5]
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See http://code.google.com/p/jsonrpclib/ for more info.
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"""
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import types
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import sys
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from xmlrpclib import Transport as XMLTransport
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from xmlrpclib import SafeTransport as XMLSafeTransport
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from xmlrpclib import ServerProxy as XMLServerProxy
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from xmlrpclib import _Method as XML_Method
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import time
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import string
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import random
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# Library includes
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import jsonrpclib
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from jsonrpclib import config
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from jsonrpclib import history
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# JSON library importing
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cjson = None
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json = None
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try:
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import cjson
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except ImportError:
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try:
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import json
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except ImportError:
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try:
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import simplejson as json
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except ImportError:
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raise ImportError(
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'You must have the cjson, json, or simplejson ' +
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'module(s) available.'
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)
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IDCHARS = string.ascii_lowercase+string.digits
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class UnixSocketMissing(Exception):
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"""
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Just a properly named Exception if Unix Sockets usage is
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attempted on a platform that doesn't support them (Windows)
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"""
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pass
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#JSON Abstractions
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def jdumps(obj, encoding='utf-8'):
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# Do 'serialize' test at some point for other classes
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global cjson
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if cjson:
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return cjson.encode(obj)
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else:
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return json.dumps(obj, encoding=encoding)
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def jloads(json_string):
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global cjson
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if cjson:
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return cjson.decode(json_string)
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else:
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return json.loads(json_string)
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# XMLRPClib re-implementations
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class ProtocolError(Exception):
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pass
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class TransportMixIn(object):
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""" Just extends the XMLRPC transport where necessary. """
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user_agent = config.user_agent
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# for Python 2.7 support
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_connection = None
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def send_content(self, connection, request_body):
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connection.putheader("Content-Type", "application/json-rpc")
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connection.putheader("Content-Length", str(len(request_body)))
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connection.endheaders()
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if request_body:
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connection.send(request_body)
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def getparser(self):
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target = JSONTarget()
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return JSONParser(target), target
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class JSONParser(object):
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def __init__(self, target):
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self.target = target
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def feed(self, data):
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self.target.feed(data)
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def close(self):
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pass
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class JSONTarget(object):
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def __init__(self):
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self.data = []
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def feed(self, data):
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self.data.append(data)
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def close(self):
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return ''.join(self.data)
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class Transport(TransportMixIn, XMLTransport):
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pass
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class SafeTransport(TransportMixIn, XMLSafeTransport):
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pass
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from httplib import HTTP, HTTPConnection
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from socket import socket
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USE_UNIX_SOCKETS = False
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try:
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from socket import AF_UNIX, SOCK_STREAM
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USE_UNIX_SOCKETS = True
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except ImportError:
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pass
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if (USE_UNIX_SOCKETS):
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class UnixHTTPConnection(HTTPConnection):
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def connect(self):
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self.sock = socket(AF_UNIX, SOCK_STREAM)
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self.sock.connect(self.host)
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class UnixHTTP(HTTP):
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_connection_class = UnixHTTPConnection
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class UnixTransport(TransportMixIn, XMLTransport):
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def make_connection(self, host):
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import httplib
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host, extra_headers, x509 = self.get_host_info(host)
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return UnixHTTP(host)
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class ServerProxy(XMLServerProxy):
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"""
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Unfortunately, much more of this class has to be copied since
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so much of it does the serialization.
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"""
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def __init__(self, uri, transport=None, encoding=None,
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verbose=0, version=None):
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import urllib
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if not version:
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version = config.version
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self.__version = version
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schema, uri = urllib.splittype(uri)
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if schema not in ('http', 'https', 'unix'):
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raise IOError('Unsupported JSON-RPC protocol.')
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if schema == 'unix':
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if not USE_UNIX_SOCKETS:
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# Don't like the "generic" Exception...
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raise UnixSocketMissing("Unix sockets not available.")
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self.__host = uri
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self.__handler = '/'
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else:
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self.__host, self.__handler = urllib.splithost(uri)
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if not self.__handler:
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# Not sure if this is in the JSON spec?
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#self.__handler = '/'
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self.__handler == '/'
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if transport is None:
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if schema == 'unix':
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transport = UnixTransport()
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elif schema == 'https':
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transport = SafeTransport()
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else:
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transport = Transport()
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self.__transport = transport
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self.__encoding = encoding
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self.__verbose = verbose
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def _request(self, methodname, params, rpcid=None):
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request = dumps(params, methodname, encoding=self.__encoding,
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rpcid=rpcid, version=self.__version)
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response = self._run_request(request)
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check_for_errors(response)
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return response['result']
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def _request_notify(self, methodname, params, rpcid=None):
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request = dumps(params, methodname, encoding=self.__encoding,
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rpcid=rpcid, version=self.__version, notify=True)
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response = self._run_request(request, notify=True)
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check_for_errors(response)
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return
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def _run_request(self, request, notify=None):
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history.add_request(request)
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response = self.__transport.request(
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self.__host,
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self.__handler,
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request,
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verbose=self.__verbose
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)
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# Here, the XMLRPC library translates a single list
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# response to the single value -- should we do the
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# same, and require a tuple / list to be passed to
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# the response object, or expect the Server to be
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# outputting the response appropriately?
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history.add_response(response)
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if not response:
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return None
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return_obj = loads(response)
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return return_obj
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def __getattr__(self, name):
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# Same as original, just with new _Method reference
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return _Method(self._request, name)
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@property
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def _notify(self):
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# Just like __getattr__, but with notify namespace.
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return _Notify(self._request_notify)
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class _Method(XML_Method):
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def __call__(self, *args, **kwargs):
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if len(args) > 0 and len(kwargs) > 0:
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raise ProtocolError('Cannot use both positional ' +
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'and keyword arguments (according to JSON-RPC spec.)')
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if len(args) > 0:
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return self.__send(self.__name, args)
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else:
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return self.__send(self.__name, kwargs)
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def __getattr__(self, name):
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self.__name = '%s.%s' % (self.__name, name)
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return self
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# The old method returned a new instance, but this seemed wasteful.
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# The only thing that changes is the name.
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#return _Method(self.__send, "%s.%s" % (self.__name, name))
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class _Notify(object):
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def __init__(self, request):
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self._request = request
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def __getattr__(self, name):
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return _Method(self._request, name)
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# Batch implementation
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class MultiCallMethod(object):
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def __init__(self, method, notify=False):
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self.method = method
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self.params = []
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self.notify = notify
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def __call__(self, *args, **kwargs):
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if len(kwargs) > 0 and len(args) > 0:
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raise ProtocolError('JSON-RPC does not support both ' +
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'positional and keyword arguments.')
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if len(kwargs) > 0:
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self.params = kwargs
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else:
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self.params = args
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def request(self, encoding=None, rpcid=None):
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return dumps(self.params, self.method, version=2.0,
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encoding=encoding, rpcid=rpcid, notify=self.notify)
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def __repr__(self):
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return '%s' % self.request()
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def __getattr__(self, method):
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new_method = '%s.%s' % (self.method, method)
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self.method = new_method
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return self
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class MultiCallNotify(object):
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def __init__(self, multicall):
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self.multicall = multicall
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def __getattr__(self, name):
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new_job = MultiCallMethod(name, notify=True)
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self.multicall._job_list.append(new_job)
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return new_job
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class MultiCallIterator(object):
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def __init__(self, results):
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self.results = results
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def __iter__(self):
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for i in range(0, len(self.results)):
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yield self[i]
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raise StopIteration
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def __getitem__(self, i):
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item = self.results[i]
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check_for_errors(item)
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return item['result']
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def __len__(self):
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return len(self.results)
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class MultiCall(object):
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def __init__(self, server):
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self._server = server
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self._job_list = []
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def _request(self):
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if len(self._job_list) < 1:
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# Should we alert? This /is/ pretty obvious.
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return
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request_body = '[ %s ]' % ','.join([job.request() for
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job in self._job_list])
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responses = self._server._run_request(request_body)
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del self._job_list[:]
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if not responses:
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responses = []
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return MultiCallIterator(responses)
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@property
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def _notify(self):
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return MultiCallNotify(self)
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def __getattr__(self, name):
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new_job = MultiCallMethod(name)
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self._job_list.append(new_job)
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return new_job
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__call__ = _request
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# These lines conform to xmlrpclib's "compatibility" line.
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# Not really sure if we should include these, but oh well.
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Server = ServerProxy
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class Fault(object):
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# JSON-RPC error class
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def __init__(self, code=-32000, message='Server error', rpcid=None):
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self.faultCode = code
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self.faultString = message
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self.rpcid = rpcid
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def error(self):
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return {'code':self.faultCode, 'message':self.faultString}
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def response(self, rpcid=None, version=None):
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if not version:
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version = config.version
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if rpcid:
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self.rpcid = rpcid
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return dumps(
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self, methodresponse=True, rpcid=self.rpcid, version=version
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)
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def __repr__(self):
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return '<Fault %s: %s>' % (self.faultCode, self.faultString)
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def random_id(length=8):
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return_id = ''
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for i in range(length):
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return_id += random.choice(IDCHARS)
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return return_id
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class Payload(dict):
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def __init__(self, rpcid=None, version=None):
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if not version:
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version = config.version
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self.id = rpcid
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self.version = float(version)
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def request(self, method, params=[]):
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if type(method) not in types.StringTypes:
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raise ValueError('Method name must be a string.')
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if not self.id:
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self.id = random_id()
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request = { 'id':self.id, 'method':method }
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if params:
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request['params'] = params
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if self.version >= 2:
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request['jsonrpc'] = str(self.version)
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return request
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def notify(self, method, params=[]):
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request = self.request(method, params)
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if self.version >= 2:
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del request['id']
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else:
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request['id'] = None
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return request
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def response(self, result=None):
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response = {'result':result, 'id':self.id}
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if self.version >= 2:
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response['jsonrpc'] = str(self.version)
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else:
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response['error'] = None
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return response
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def error(self, code=-32000, message='Server error.'):
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error = self.response()
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if self.version >= 2:
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del error['result']
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else:
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error['result'] = None
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error['error'] = {'code':code, 'message':message}
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return error
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def dumps(params=[], methodname=None, methodresponse=None,
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encoding=None, rpcid=None, version=None, notify=None):
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"""
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This differs from the Python implementation in that it implements
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the rpcid argument since the 2.0 spec requires it for responses.
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"""
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if not version:
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version = config.version
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valid_params = (types.TupleType, types.ListType, types.DictType)
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if methodname in types.StringTypes and \
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type(params) not in valid_params and \
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not isinstance(params, Fault):
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"""
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If a method, and params are not in a listish or a Fault,
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error out.
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"""
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raise TypeError('Params must be a dict, list, tuple or Fault ' +
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'instance.')
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# Begin parsing object
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payload = Payload(rpcid=rpcid, version=version)
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if not encoding:
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encoding = 'utf-8'
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if type(params) is Fault:
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response = payload.error(params.faultCode, params.faultString)
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return jdumps(response, encoding=encoding)
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if type(methodname) not in types.StringTypes and methodresponse != True:
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raise ValueError('Method name must be a string, or methodresponse '+
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'must be set to True.')
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if config.use_jsonclass == True:
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from jsonrpclib import jsonclass
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params = jsonclass.dump(params)
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if methodresponse is True:
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if rpcid is None:
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raise ValueError('A method response must have an rpcid.')
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response = payload.response(params)
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return jdumps(response, encoding=encoding)
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request = None
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if notify == True:
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request = payload.notify(methodname, params)
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else:
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request = payload.request(methodname, params)
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return jdumps(request, encoding=encoding)
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def loads(data):
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"""
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This differs from the Python implementation, in that it returns
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the request structure in Dict format instead of the method, params.
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It will return a list in the case of a batch request / response.
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"""
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if data == '':
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# notification
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return None
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result = jloads(data)
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# if the above raises an error, the implementing server code
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# should return something like the following:
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# { 'jsonrpc':'2.0', 'error': fault.error(), id: None }
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if config.use_jsonclass == True:
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from jsonrpclib import jsonclass
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result = jsonclass.load(result)
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return result
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def check_for_errors(result):
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if not result:
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# Notification
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return result
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if type(result) is not types.DictType:
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raise TypeError('Response is not a dict.')
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if 'jsonrpc' in result.keys() and float(result['jsonrpc']) > 2.0:
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raise NotImplementedError('JSON-RPC version not yet supported.')
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if 'result' not in result.keys() and 'error' not in result.keys():
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raise ValueError('Response does not have a result or error key.')
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if 'error' in result.keys() and result['error'] != None:
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code = result['error']['code']
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message = result['error']['message']
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raise ProtocolError((code, message))
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return result
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def isbatch(result):
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if type(result) not in (types.ListType, types.TupleType):
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return False
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if len(result) < 1:
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return False
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if type(result[0]) is not types.DictType:
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return False
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if 'jsonrpc' not in result[0].keys():
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return False
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try:
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version = float(result[0]['jsonrpc'])
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except ValueError:
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raise ProtocolError('"jsonrpc" key must be a float(able) value.')
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if version < 2:
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return False
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return True
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def isnotification(request):
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if 'id' not in request.keys():
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# 2.0 notification
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return True
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if request['id'] == None:
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# 1.0 notification
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return True
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return False
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