""" 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 decimal import json import logging import socket try: import urllib.parse as urlparse except ImportError: import urlparse USER_AGENT = "AuthServiceProxy/0.1" HTTP_TIMEOUT = 30 log = logging.getLogger("BitcoinRPC") class JSONRPCException(Exception): def __init__(self, rpc_error): try: errmsg = '%(message)s (%(code)i)' % rpc_error except (KeyError, TypeError): errmsg = '' Exception.__init__(self, errmsg) self.error = rpc_error def EncodeDecimal(o): if isinstance(o, decimal.Decimal): return str(o) raise TypeError(repr(o) + " is not JSON serializable") class AuthServiceProxy(object): __id_count = 0 # ensure_ascii: escape unicode as \uXXXX, passed to json.dumps def __init__(self, service_url, service_name=None, timeout=HTTP_TIMEOUT, connection=None, ensure_ascii=True): self.__service_url = service_url self._service_name = service_name self.ensure_ascii = ensure_ascii # can be toggled on the fly by tests self.__url = urlparse.urlparse(service_url) if self.__url.port is None: port = 80 else: port = self.__url.port (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, timeout=timeout) else: self.__conn = httplib.HTTPConnection(self.__url.hostname, port, timeout=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 _request(self, method, path, postdata): ''' Do a HTTP request, with retry if we get disconnected (e.g. due to a timeout). This is a workaround for https://bugs.python.org/issue3566 which is fixed in Python 3.5. ''' headers = {'Host': self.__url.hostname, 'User-Agent': USER_AGENT, 'Authorization': self.__auth_header, 'Content-type': 'application/json'} try: self.__conn.request(method, path, postdata, headers) return self._get_response() except httplib.BadStatusLine as e: if e.line == "''": # if connection was closed, try again self.__conn.close() self.__conn.request(method, path, postdata, headers) return self._get_response() else: raise except (BrokenPipeError,ConnectionResetError): # Python 3.5+ raises BrokenPipeError instead of BadStatusLine when the connection was reset # ConnectionResetError happens on FreeBSD with Python 3.4 self.__conn.close() self.__conn.request(method, path, postdata, headers) return self._get_response() def __call__(self, *args): AuthServiceProxy.__id_count += 1 log.debug("-%s-> %s %s"%(AuthServiceProxy.__id_count, self._service_name, json.dumps(args, default=EncodeDecimal, ensure_ascii=self.ensure_ascii))) postdata = json.dumps({'version': '1.1', 'method': self._service_name, 'params': args, 'id': AuthServiceProxy.__id_count}, default=EncodeDecimal, ensure_ascii=self.ensure_ascii) response = self._request('POST', self.__url.path, postdata.encode('utf-8')) 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), default=EncodeDecimal, ensure_ascii=self.ensure_ascii) log.debug("--> "+postdata) return self._request('POST', self.__url.path, postdata.encode('utf-8')) def _get_response(self): try: http_response = self.__conn.getresponse() except socket.timeout as e: raise JSONRPCException({ 'code': -344, 'message': '%r RPC took longer than %f seconds. Consider ' 'using larger timeout for calls that take ' 'longer to return.' % (self._service_name, self.__conn.timeout)}) if http_response is None: raise JSONRPCException({ 'code': -342, 'message': 'missing HTTP response from server'}) content_type = http_response.getheader('Content-Type') if content_type != 'application/json': raise JSONRPCException({ 'code': -342, 'message': 'non-JSON HTTP response with \'%i %s\' from server' % (http_response.status, http_response.reason)}) responsedata = http_response.read().decode('utf8') response = json.loads(responsedata, parse_float=decimal.Decimal) if "error" in response and response["error"] is None: log.debug("<-%s- %s"%(response["id"], json.dumps(response["result"], default=EncodeDecimal, ensure_ascii=self.ensure_ascii))) else: log.debug("<-- "+responsedata) return response