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"""
Copyright 2011 Jeff Garzik
AuthServiceProxy has the following improvements over python-jsonrpc's
ServiceProxy class:
- HTTP connections persist for the life of the AuthServiceProxy object
(if server supports HTTP/1.1)
- sends protocol 'version', per JSON-RPC 1.1
- sends proper, incrementing 'id'
- sends Basic HTTP authentication headers
- parses all JSON numbers that look like floats as Decimal
- uses standard Python json lib
Previous copyright, from python-jsonrpc/jsonrpc/proxy.py:
Copyright (c) 2007 Jan-Klaas Kollhof
This file is part of jsonrpc.
jsonrpc is free software; you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
This software is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this software; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
"""
try:
import http.client as httplib
except ImportError:
import httplib
import base64
import json
import decimal
try:
import urllib.parse as urlparse
except ImportError:
import urlparse
USER_AGENT = "AuthServiceProxy/0.1"
HTTP_TIMEOUT = 30
class JSONRPCException(Exception):
def __init__(self, rpc_error):
Exception.__init__(self)
self.error = rpc_error
class AuthServiceProxy(object):
def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connection=None):
self.__service_url = service_url
self.__service_name = service_name
self.__url = urlparse.urlparse(service_url)
if self.__url.port is None:
port = 80
else:
port = self.__url.port
self.__id_count = 0
(user, passwd) = (self.__url.username, self.__url.password)
try:
user = user.encode('utf8')
except AttributeError:
pass
try:
passwd = passwd.encode('utf8')
except AttributeError:
pass
authpair = user + b':' + passwd
self.__auth_header = b'Basic ' + base64.b64encode(authpair)
if connection:
# Callables re-use the connection of the original proxy
self.__conn = connection
elif self.__url.scheme == 'https':
self.__conn = httplib.HTTPSConnection(self.__url.hostname, port,
None, None, False,
timeout)
else:
self.__conn = httplib.HTTPConnection(self.__url.hostname, port,
False, timeout)
def __getattr__(self, name):
if name.startswith('__') and name.endswith('__'):
# Python internal stuff
raise AttributeError
if self.__service_name is not None:
name = "%s.%s" % (self.__service_name, name)
return AuthServiceProxy(self.__service_url, name, connection=self.__conn)
def __call__(self, *args):
self.__id_count += 1
postdata = json.dumps({'version': '1.1',
'method': self.__service_name,
'params': args,
'id': self.__id_count})
self.__conn.request('POST', self.__url.path, postdata,
{'Host': self.__url.hostname,
'User-Agent': USER_AGENT,
'Authorization': self.__auth_header,
'Content-type': 'application/json'})
response = self._get_response()
if response['error'] is not None:
raise JSONRPCException(response['error'])
elif 'result' not in response:
raise JSONRPCException({
'code': -343, 'message': 'missing JSON-RPC result'})
else:
return response['result']
def _batch(self, rpc_call_list):
postdata = json.dumps(list(rpc_call_list))
self.__conn.request('POST', self.__url.path, postdata,
{'Host': self.__url.hostname,
'User-Agent': USER_AGENT,
'Authorization': self.__auth_header,
'Content-type': 'application/json'})
return self._get_response()
def _get_response(self):
http_response = self.__conn.getresponse()
if http_response is None:
raise JSONRPCException({
'code': -342, 'message': 'missing HTTP response from server'})
return json.loads(http_response.read().decode('utf8'),
parse_float=decimal.Decimal)
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