173 lines
6.4 KiB
Python
173 lines
6.4 KiB
Python
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"""
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Copyright 2011 Jeff Garzik
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AuthServiceProxy has the following improvements over python-jsonrpc's
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ServiceProxy class:
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- HTTP connections persist for the life of the AuthServiceProxy object
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(if server supports HTTP/1.1)
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- sends protocol 'version', per JSON-RPC 1.1
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- sends proper, incrementing 'id'
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- sends Basic HTTP authentication headers
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- parses all JSON numbers that look like floats as Decimal
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- uses standard Python json lib
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Previous copyright, from python-jsonrpc/jsonrpc/proxy.py:
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Copyright (c) 2007 Jan-Klaas Kollhof
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This file is part of jsonrpc.
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jsonrpc is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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This software is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this software; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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"""
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try:
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import http.client as httplib
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except ImportError:
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import httplib
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import base64
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import decimal
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import json
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import logging
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try:
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import urllib.parse as urlparse
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except ImportError:
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import urlparse
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USER_AGENT = "AuthServiceProxy/0.1"
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HTTP_TIMEOUT = 30
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log = logging.getLogger("BitcoinRPC")
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class JSONRPCException(Exception):
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def __init__(self, rpc_error):
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Exception.__init__(self)
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self.error = rpc_error
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def EncodeDecimal(o):
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if isinstance(o, decimal.Decimal):
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return str(o)
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raise TypeError(repr(o) + " is not JSON serializable")
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class AuthServiceProxy(object):
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__id_count = 0
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def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connection=None):
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self.__service_url = service_url
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self._service_name = service_name
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self.__url = urlparse.urlparse(service_url)
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if self.__url.port is None:
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port = 80
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else:
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port = self.__url.port
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(user, passwd) = (self.__url.username, self.__url.password)
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try:
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user = user.encode('utf8')
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except AttributeError:
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pass
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try:
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passwd = passwd.encode('utf8')
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except AttributeError:
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pass
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authpair = user + b':' + passwd
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self.__auth_header = b'Basic ' + base64.b64encode(authpair)
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if connection:
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# Callables re-use the connection of the original proxy
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self.__conn = connection
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elif self.__url.scheme == 'https':
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self.__conn = httplib.HTTPSConnection(self.__url.hostname, port,
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timeout=timeout)
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else:
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self.__conn = httplib.HTTPConnection(self.__url.hostname, port,
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timeout=timeout)
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def __getattr__(self, name):
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if name.startswith('__') and name.endswith('__'):
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# Python internal stuff
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raise AttributeError
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if self._service_name is not None:
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name = "%s.%s" % (self._service_name, name)
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return AuthServiceProxy(self.__service_url, name, connection=self.__conn)
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def _request(self, method, path, postdata):
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'''
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Do a HTTP request, with retry if we get disconnected (e.g. due to a timeout).
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This is a workaround for https://bugs.python.org/issue3566 which is fixed in Python 3.5.
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'''
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headers = {'Host': self.__url.hostname,
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'User-Agent': USER_AGENT,
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'Authorization': self.__auth_header,
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'Content-type': 'application/json'}
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try:
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self.__conn.request(method, path, postdata, headers)
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return self._get_response()
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except httplib.BadStatusLine as e:
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if e.line == "''": # if connection was closed, try again
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self.__conn.close()
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self.__conn.request(method, path, postdata, headers)
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return self._get_response()
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else:
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raise
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except BrokenPipeError:
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# Python 3.5+ raises this instead of BadStatusLine when the connection was reset
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self.__conn.close()
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self.__conn.request(method, path, postdata, headers)
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return self._get_response()
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def __call__(self, *args):
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AuthServiceProxy.__id_count += 1
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log.debug("-%s-> %s %s"%(AuthServiceProxy.__id_count, self._service_name,
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json.dumps(args, default=EncodeDecimal)))
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postdata = json.dumps({'version': '1.1',
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'method': self._service_name,
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'params': args,
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'id': AuthServiceProxy.__id_count}, default=EncodeDecimal)
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response = self._request('POST', self.__url.path, postdata)
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if response['error'] is not None:
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raise JSONRPCException(response['error'])
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elif 'result' not in response:
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raise JSONRPCException({
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'code': -343, 'message': 'missing JSON-RPC result'})
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else:
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return response['result']
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def _batch(self, rpc_call_list):
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postdata = json.dumps(list(rpc_call_list), default=EncodeDecimal)
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log.debug("--> "+postdata)
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return self._request('POST', self.__url.path, postdata)
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def _get_response(self):
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http_response = self.__conn.getresponse()
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if http_response is None:
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raise JSONRPCException({
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'code': -342, 'message': 'missing HTTP response from server'})
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content_type = http_response.getheader('Content-Type')
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if content_type != 'application/json':
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raise JSONRPCException({
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'code': -342, 'message': 'non-JSON HTTP response with \'%i %s\' from server' % (http_response.status, http_response.reason)})
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responsedata = http_response.read().decode('utf8')
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response = json.loads(responsedata, parse_float=decimal.Decimal)
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if "error" in response and response["error"] is None:
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log.debug("<-%s- %s"%(response["id"], json.dumps(response["result"], default=EncodeDecimal)))
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else:
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log.debug("<-- "+responsedata)
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return response
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