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rpc_connection.py
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rpc_connection.py
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import socket
import select
import hashlib
import bencoding
class ConnectionError(Exception):
pass
class PingNotReturned(Exception):
pass
class MissingCredentials(Exception):
pass
class AuthFailed(Exception):
pass
class RpcConnection:
def __init__(self, host='127.0.0.1', port=11234, password=None):
self.host = host
self.port = port
self.password = password
self.sock = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
self.sock.settimeout(0.1)
self.connected = False
self.broken = False
def connect(self):
try:
self.sock.connect((self.host, self.port))
self.connected = True
return True
except socket.error:
self.connected = False
self.broken = True
return False
def close(self):
try:
self.connected = False
self.broken = True
self.sock.shutdown(socket.SHUT_RDWR)
self.sock.close()
except socket.error:
pass
def call(self, query, args=None, auth=False):
dict = {'q': query}
if args is not None:
dict['args'] = args
if auth:
dict = self.authenticate(dict)
query = bencoding.encode(dict)
try:
self.sock.send(query)
response = self.sock.recv(1024 * 1024)
if len(response) < 1:
raise ConnectionError()
response = bencoding.decode(response)
if self.check_respose_auth_failed(response):
raise AuthFailed()
else:
return response
except (socket.error, ConnectionError):
self.connected = False
self.broken = True
raise ConnectionError()
except bencoding.DecodeError:
return None
def authenticate(self, dict):
cookie = self.cookie()
if cookie is None:
return False
cookie = cookie.get('cookie')
password = self.password or ''
hash = hashlib.sha256((password + cookie).encode('utf-8')).hexdigest()
if 'q' in dict:
dict['aq'] = dict['q']
dict['q'] = 'auth'
dict['hash'] = hash
dict['cookie'] = cookie
request = bencoding.encode(dict)
dict['hash'] = hashlib.sha256(request).hexdigest()
return dict
def check_respose_auth_failed(self, response):
return isinstance(response, dict) and ('error' in response) and (response['error'] == 'Auth failed.')
def test_auth(self):
try:
response = self.dump_routing_table(0)
return True
except AuthFailed:
return False
def ping(self):
try:
return self.call('ping')['q'] == 'pong'
except (TypeError, KeyError):
return False
def cookie(self):
return self.call('cookie')
def memory(self):
return self.call('memory')
def exit(self):
dict = self.authenticate({'q': 'Core_exit'})
query = bencoding.encode(dict)
try:
self.sock.send(query)
self.close()
except socket.error:
self.connected = False
self.broken = True
def dump_routing_table(self, page=None):
if page is None:
page = 0
routing_table = []
response = {'more': 1}
while 'more' in response:
response = self.dump_routing_table(page)
if response is None:
return None
routing_table.extend(response['routingTable'])
page += 1
return {'routingTable': routing_table}
else:
return self.call('NodeStore_dumpTable', args={'page': page}, auth=True)
def count_unique_nodes(self):
routing_table = self.dump_routing_table()
if routing_table is not None:
nodes = set([route['ip'] for route in routing_table['routingTable']])
return len(nodes)