1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
# Copyright (c) 2011 Jeff Garzik
#
# 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
"""HTTP proxy for opening RPC connection to bitcoind.
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
"""
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, **argsn):
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)))
if args and argsn:
raise ValueError('Cannot handle both named and positional arguments')
postdata = json.dumps({'version': '1.1',
'method': self._service_name,
'params': args or argsn,
'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
|
