164 lines
6.0 KiB
164 lines
6.0 KiB
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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 round(o, 8) |
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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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None, None, False, |
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timeout) |
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else: |
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self.__conn = httplib.HTTPConnection(self.__url.hostname, port, |
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False, 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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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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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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