eb38e0ffff
- Preparation work for using six or future module for Py2/3 compat. The code will be written in Python 3 with Python 2 fallbacks. - Added some Py3 imports with Py2 fallbacks to make it easier to remove Py2 code in future. - Replace xrange with range (sort out import as top of files in future). - Workaround Py2to3 basestring issue with inline if in instances. This means every usage of basestring is more considered. - Replace iteritems and itervalues for items and values. There might be a performance penalty on Py2 so might need to revisit this change.
796 lines
27 KiB
Python
796 lines
27 KiB
Python
# -*- coding: utf-8 -*-
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#
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# Copyright (C) 2009 Andrew Resch <andrewresch@gmail.com>
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# Copyright (C) 2011 Pedro Algarvio <pedro@algarvio.me>
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#
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# This file is part of Deluge and is licensed under GNU General Public License 3.0, or later, with
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# the additional special exception to link portions of this program with the OpenSSL library.
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# See LICENSE for more details.
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#
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from __future__ import unicode_literals
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import logging
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import subprocess
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import sys
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from twisted.internet import defer, reactor, ssl
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from twisted.internet.protocol import ClientFactory
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import deluge.common
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from deluge import error
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from deluge.decorators import deprecated
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from deluge.transfer import DelugeTransferProtocol
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from deluge.ui.common import get_localhost_auth
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RPC_RESPONSE = 1
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RPC_ERROR = 2
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RPC_EVENT = 3
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log = logging.getLogger(__name__)
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def format_kwargs(kwargs):
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return ', '.join([key + '=' + str(value) for key, value in kwargs.items()])
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class DelugeRPCRequest(object):
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"""
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This object is created whenever there is a RPCRequest to be sent to the
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daemon. It is generally only used by the DaemonProxy's call method.
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"""
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request_id = None
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method = None
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args = None
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kwargs = None
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def __repr__(self):
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"""
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Returns a string of the RPCRequest in the following form:
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method(arg, kwarg=foo, ...)
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"""
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s = self.method + '('
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if self.args:
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s += ', '.join([str(x) for x in self.args])
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if self.kwargs:
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if self.args:
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s += ', '
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s += format_kwargs(self.kwargs)
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s += ')'
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return s
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def format_message(self):
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"""
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Returns a properly formatted RPCRequest based on the properties. Will
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raise a TypeError if the properties haven't been set yet.
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:returns: a properly formated RPCRequest
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"""
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if self.request_id is None or self.method is None or self.args is None or self.kwargs is None:
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raise TypeError('You must set the properties of this object before calling format_message!')
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return (self.request_id, self.method, self.args, self.kwargs)
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class DelugeRPCProtocol(DelugeTransferProtocol):
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def connectionMade(self): # NOQA: N802
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self.__rpc_requests = {}
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# Set the protocol in the daemon so it can send data
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self.factory.daemon.protocol = self
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# Get the address of the daemon that we've connected to
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peer = self.transport.getPeer()
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self.factory.daemon.host = peer.host
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self.factory.daemon.port = peer.port
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self.factory.daemon.connected = True
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log.debug('Connected to daemon at %s:%s..', peer.host, peer.port)
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self.factory.daemon.connect_deferred.callback((peer.host, peer.port))
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def message_received(self, request):
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"""
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This method is called whenever we receive a message from the daemon.
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:param request: a tuple that should be either a RPCResponse, RCPError or RPCSignal
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"""
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if not isinstance(request, tuple):
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log.debug('Received invalid message: type is not tuple')
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return
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if len(request) < 3:
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log.debug('Received invalid message: number of items in '
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'response is %s', len(request))
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return
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message_type = request[0]
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if message_type == RPC_EVENT:
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event = request[1]
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# log.debug('Received RPCEvent: %s', event)
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# A RPCEvent was received from the daemon so run any handlers
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# associated with it.
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if event in self.factory.event_handlers:
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for handler in self.factory.event_handlers[event]:
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reactor.callLater(0, handler, *request[2])
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return
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request_id = request[1]
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# We get the Deferred object for this request_id to either run the
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# callbacks or the errbacks dependent on the response from the daemon.
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d = self.factory.daemon.pop_deferred(request_id)
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if message_type == RPC_RESPONSE:
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# Run the callbacks registered with this Deferred object
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d.callback(request[2])
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elif message_type == RPC_ERROR:
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# Recreate exception and errback'it
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try:
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# The exception class is located in deluge.error
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try:
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exception_cls = getattr(error, request[2])
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exception = exception_cls(*request[3], **request[4])
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except TypeError:
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log.warn('Received invalid RPC_ERROR (Old daemon?): %s', request[2])
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return
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# Ideally we would chain the deferreds instead of instance
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# checking just to log them. But, that would mean that any
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# errback on the fist deferred should returns it's failure
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# so it could pass back to the 2nd deferred on the chain. But,
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# that does not always happen.
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# So, just do some instance checking and just log rpc error at
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# diferent levels.
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r = self.__rpc_requests[request_id]
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msg = 'RPCError Message Received!'
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msg += '\n' + '-' * 80
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msg += '\n' + 'RPCRequest: ' + r.__repr__()
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msg += '\n' + '-' * 80
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if isinstance(exception, error.WrappedException):
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msg += '\n' + exception.type + '\n' + exception.message + ': '
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msg += exception.traceback
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else:
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msg += '\n' + request[5] + '\n' + request[2] + ': '
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msg += str(exception)
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msg += '\n' + '-' * 80
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if not isinstance(exception, error._ClientSideRecreateError):
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# Let's log these as errors
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log.error(msg)
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else:
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# The rest just get's logged in debug level, just to log
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# what's happening
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log.debug(msg)
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except Exception:
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import traceback
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log.error('Failed to handle RPC_ERROR (Old daemon?): %s\nLocal error: %s',
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request[2], traceback.format_exc())
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d.errback(exception)
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del self.__rpc_requests[request_id]
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def send_request(self, request):
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"""
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Sends a RPCRequest to the server.
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:param request: RPCRequest
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"""
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try:
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# Store the DelugeRPCRequest object just in case a RPCError is sent in
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# response to this request. We use the extra information when printing
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# out the error for debugging purposes.
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self.__rpc_requests[request.request_id] = request
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# log.debug('Sending RPCRequest %s: %s', request.request_id, request)
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# Send the request in a tuple because multiple requests can be sent at once
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self.transfer_message((request.format_message(),))
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except Exception as ex:
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log.warn('Error occurred when sending message: %s', ex)
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class DelugeRPCClientFactory(ClientFactory):
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protocol = DelugeRPCProtocol
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def __init__(self, daemon, event_handlers):
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self.daemon = daemon
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self.event_handlers = event_handlers
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def startedConnecting(self, connector): # NOQA: N802
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log.debug('Connecting to daemon at "%s:%s"...',
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connector.host, connector.port)
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def clientConnectionFailed(self, connector, reason): # NOQA: N802
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log.debug('Connection to daemon at "%s:%s" failed: %s',
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connector.host, connector.port, reason.value)
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self.daemon.connect_deferred.errback(reason)
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def clientConnectionLost(self, connector, reason): # NOQA: N802
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log.debug('Connection lost to daemon at "%s:%s" reason: %s',
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connector.host, connector.port, reason.value)
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self.daemon.host = None
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self.daemon.port = None
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self.daemon.username = None
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self.daemon.connected = False
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if self.daemon.disconnect_deferred and not self.daemon.disconnect_deferred.called:
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self.daemon.disconnect_deferred.callback(reason.value)
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self.daemon.disconnect_deferred = None
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if self.daemon.disconnect_callback:
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self.daemon.disconnect_callback()
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class DaemonProxy(object):
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pass
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class DaemonSSLProxy(DaemonProxy):
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def __init__(self, event_handlers=None):
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if event_handlers is None:
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event_handlers = {}
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self.__factory = DelugeRPCClientFactory(self, event_handlers)
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self.__factory.noisy = False
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self.__request_counter = 0
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self.__deferred = {}
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# This is set when a connection is made to the daemon
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self.protocol = None
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# This is set when a connection is made
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self.host = None
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self.port = None
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self.username = None
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self.authentication_level = 0
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self.connected = False
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self.disconnect_deferred = None
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self.disconnect_callback = None
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self.auth_levels_mapping = None
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self.auth_levels_mapping_reverse = None
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def connect(self, host, port):
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"""
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Connects to a daemon at host:port
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:param host: str, the host to connect to
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:param port: int, the listening port on the daemon
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:returns: twisted.Deferred
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"""
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log.debug('sslproxy.connect()')
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self.host = host
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self.port = port
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self.__connector = reactor.connectSSL(self.host, self.port,
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self.__factory,
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ssl.ClientContextFactory())
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self.connect_deferred = defer.Deferred()
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self.daemon_info_deferred = defer.Deferred()
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# Upon connect we do a 'daemon.login' RPC
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self.connect_deferred.addCallback(self.__on_connect)
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self.connect_deferred.addErrback(self.__on_connect_fail)
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return self.daemon_info_deferred
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def disconnect(self):
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log.debug('sslproxy.disconnect()')
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self.disconnect_deferred = defer.Deferred()
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self.__connector.disconnect()
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return self.disconnect_deferred
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def call(self, method, *args, **kwargs):
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"""
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Makes a RPCRequest to the daemon. All methods should be in the form of
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'component.method'.
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:params method: str, the method to call in the form of 'component.method'
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:params args: the arguments to call the remote method with
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:params kwargs: the keyword arguments to call the remote method with
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:return: a twisted.Deferred object that will be activated when a RPCResponse
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or RPCError is received from the daemon
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"""
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# Create the DelugeRPCRequest to pass to protocol.send_request()
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request = DelugeRPCRequest()
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request.request_id = self.__request_counter
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request.method = method
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request.args = args
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request.kwargs = kwargs
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# Send the request to the server
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self.protocol.send_request(request)
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# Create a Deferred object to return and add a default errback to print
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# the error.
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d = defer.Deferred()
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# Store the Deferred until we receive a response from the daemon
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self.__deferred[self.__request_counter] = d
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# Increment the request counter since we don't want to use the same one
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# before a response is received.
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self.__request_counter += 1
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return d
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def pop_deferred(self, request_id):
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"""
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Pops a Deferred object. This is generally called once we receive the
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reply we were waiting on from the server.
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:param request_id: the request_id of the Deferred to pop
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:type request_id: int
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"""
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return self.__deferred.pop(request_id)
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def register_event_handler(self, event, handler):
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"""
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Registers a handler function to be called when `:param:event` is received
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from the daemon.
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:param event: the name of the event to handle
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:type event: str
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:param handler: the function to be called when `:param:event`
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is emitted from the daemon
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:type handler: function
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"""
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if event not in self.__factory.event_handlers:
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# This is a new event to handle, so we need to tell the daemon
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# that we're interested in receiving this type of event
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self.__factory.event_handlers[event] = []
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if self.connected:
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self.call('daemon.set_event_interest', [event])
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# Only add the handler if it's not already registered
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if handler not in self.__factory.event_handlers[event]:
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self.__factory.event_handlers[event].append(handler)
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def deregister_event_handler(self, event, handler):
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"""
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Deregisters a event handler.
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:param event: the name of the event
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:type event: str
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:param handler: the function registered
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:type handler: function
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"""
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if event in self.__factory.event_handlers and handler in self.__factory.event_handlers[event]:
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self.__factory.event_handlers[event].remove(handler)
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def __on_connect(self, result):
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log.debug('__on_connect called')
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def on_info(daemon_info):
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self.daemon_info = daemon_info
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log.debug('Got info from daemon: %s', daemon_info)
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self.daemon_info_deferred.callback(daemon_info)
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def on_info_fail(reason):
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log.debug('Failed to get info from daemon')
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log.exception(reason)
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self.daemon_info_deferred.errback(reason)
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self.call('daemon.info').addCallback(on_info).addErrback(on_info_fail)
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return self.daemon_info_deferred
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def __on_connect_fail(self, reason):
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self.daemon_info_deferred.errback(reason)
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def authenticate(self, username, password):
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log.debug('%s.authenticate: %s', self.__class__.__name__, username)
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login_deferred = defer.Deferred()
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d = self.call('daemon.login', username, password,
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client_version=deluge.common.get_version())
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d.addCallbacks(self.__on_login, self.__on_login_fail, callbackArgs=[username, login_deferred],
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errbackArgs=[login_deferred])
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return login_deferred
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def __on_login(self, result, username, login_deferred):
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log.debug('__on_login called: %s %s', username, result)
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self.username = username
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self.authentication_level = result
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# We need to tell the daemon what events we're interested in receiving
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if self.__factory.event_handlers:
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self.call('daemon.set_event_interest',
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list(self.__factory.event_handlers.keys()))
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self.call('core.get_auth_levels_mappings').addCallback(
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self.__on_auth_levels_mappings
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)
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login_deferred.callback(result)
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def __on_login_fail(self, result, login_deferred):
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login_deferred.errback(result)
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def __on_auth_levels_mappings(self, result):
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auth_levels_mapping, auth_levels_mapping_reverse = result
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self.auth_levels_mapping = auth_levels_mapping
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self.auth_levels_mapping_reverse = auth_levels_mapping_reverse
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def set_disconnect_callback(self, cb):
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"""
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Set a function to be called when the connection to the daemon is lost
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for any reason.
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"""
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self.disconnect_callback = cb
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def get_bytes_recv(self):
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return self.protocol.get_bytes_recv()
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def get_bytes_sent(self):
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return self.protocol.get_bytes_sent()
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class DaemonStandaloneProxy(DaemonProxy):
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def __init__(self, event_handlers=None):
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if event_handlers is None:
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event_handlers = {}
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from deluge.core import daemon
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self.__daemon = daemon.Daemon(standalone=True)
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self.__daemon.start()
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log.debug('daemon created!')
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self.connected = True
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self.host = 'localhost'
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self.port = 58846
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# Running in standalone mode, it's safe to import auth level
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from deluge.core.authmanager import (AUTH_LEVEL_ADMIN,
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AUTH_LEVELS_MAPPING,
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AUTH_LEVELS_MAPPING_REVERSE)
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self.username = 'localclient'
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self.authentication_level = AUTH_LEVEL_ADMIN
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self.auth_levels_mapping = AUTH_LEVELS_MAPPING
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self.auth_levels_mapping_reverse = AUTH_LEVELS_MAPPING_REVERSE
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# Register the event handlers
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for event in event_handlers:
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for handler in event_handlers[event]:
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self.__daemon.core.eventmanager.register_event_handler(event, handler)
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def disconnect(self):
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self.connected = False
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self.__daemon = None
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def call(self, method, *args, **kwargs):
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# log.debug('call: %s %s %s', method, args, kwargs)
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import copy
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try:
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m = self.__daemon.rpcserver.get_object_method(method)
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except Exception as ex:
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log.exception(ex)
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return defer.fail(ex)
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else:
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return defer.maybeDeferred(
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m, *copy.deepcopy(args), **copy.deepcopy(kwargs)
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)
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def register_event_handler(self, event, handler):
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"""
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Registers a handler function to be called when `:param:event` is
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received from the daemon.
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:param event: the name of the event to handle
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:type event: str
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:param handler: the function to be called when `:param:event`
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is emitted from the daemon
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:type handler: function
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"""
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self.__daemon.core.eventmanager.register_event_handler(event, handler)
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def deregister_event_handler(self, event, handler):
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"""
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Deregisters a event handler.
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:param event: the name of the event
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:type event: str
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:param handler: the function registered
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:type handler: function
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"""
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self.__daemon.core.eventmanager.deregister_event_handler(event, handler)
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class DottedObject(object):
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"""
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This is used for dotted name calls to client
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"""
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def __init__(self, daemon, method):
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self.daemon = daemon
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self.base = method
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def __call__(self, *args, **kwargs):
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raise Exception('You must make calls in the form of "component.method"')
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def __getattr__(self, name):
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return RemoteMethod(self.daemon, self.base + '.' + name)
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class RemoteMethod(DottedObject):
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"""
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This is used when something like 'client.core.get_something()' is attempted.
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"""
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def __call__(self, *args, **kwargs):
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return self.daemon.call(self.base, *args, **kwargs)
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class Client(object):
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"""
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This class is used to connect to a daemon process and issue RPC requests.
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"""
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__event_handlers = {
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}
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def __init__(self):
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self._daemon_proxy = None
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self.disconnect_callback = None
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self.__started_standalone = False
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def connect(self, host='127.0.0.1', port=58846, username='', password='',
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skip_authentication=False):
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"""
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Connects to a daemon process.
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:param host: str, the hostname of the daemon
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:param port: int, the port of the daemon
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:param username: str, the username to login with
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:param password: str, the password to login with
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:returns: a Deferred object that will be called once the connection
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has been established or fails
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"""
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self._daemon_proxy = DaemonSSLProxy(dict(self.__event_handlers))
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self._daemon_proxy.set_disconnect_callback(self.__on_disconnect)
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d = self._daemon_proxy.connect(host, port)
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def on_connected(daemon_version):
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log.debug('on_connected. Daemon version: %s', daemon_version)
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return daemon_version
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def on_connect_fail(reason):
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log.debug('on_connect_fail: %s', reason)
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self.disconnect()
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return reason
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def on_authenticate(result, daemon_info):
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log.debug('Authentication successful: %s', result)
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return result
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def on_authenticate_fail(reason):
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log.debug('Failed to authenticate: %s', reason.value)
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return reason
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def authenticate(daemon_version, username, password):
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if not username and host in ('127.0.0.1', 'localhost'):
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# No username provided and it's localhost, so attempt to get credentials from auth file.
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username, password = get_localhost_auth()
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d = self._daemon_proxy.authenticate(username, password)
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d.addCallback(on_authenticate, daemon_version)
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d.addErrback(on_authenticate_fail)
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return d
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d.addCallback(on_connected)
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d.addErrback(on_connect_fail)
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if not skip_authentication:
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d.addCallback(authenticate, username, password)
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return d
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def disconnect(self):
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"""
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Disconnects from the daemon.
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"""
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if self.is_standalone():
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self._daemon_proxy.disconnect()
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self.stop_standalone()
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return defer.succeed(True)
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if self._daemon_proxy:
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return self._daemon_proxy.disconnect()
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def start_standalone(self):
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"""
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Starts a daemon in the same process as the client.
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"""
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self._daemon_proxy = DaemonStandaloneProxy(self.__event_handlers)
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self.__started_standalone = True
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def stop_standalone(self):
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"""
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Stops the daemon process in the client.
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"""
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self._daemon_proxy = None
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self.__started_standalone = False
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@deprecated
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def start_classic_mode(self):
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"""Deprecated: Use start_standalone"""
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self.start_standalone()
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@deprecated
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def stop_classic_mode(self):
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"""Deprecated: Use stop_standalone"""
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self.stop_standalone()
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def start_daemon(self, port, config):
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"""
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Starts a daemon process.
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:param port: the port for the daemon to listen on
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:type port: int
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:param config: the path to the current config folder
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:type config: str
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:returns: True if started, False if not
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:rtype: bool
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:raises OSError: received from subprocess.call()
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"""
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# subprocess.popen does not work with unicode args (with non-ascii characters) on windows
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config = config.encode(sys.getfilesystemencoding())
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try:
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subprocess.Popen(['deluged', '--port=%s' % port, '--config=%s' % config])
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except OSError as ex:
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from errno import ENOENT
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if ex.errno == ENOENT:
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log.error(
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_('Deluge cannot find the `deluged` executable, check that '
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'the deluged package is installed, or added to your PATH.'))
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else:
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log.exception(ex)
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raise ex
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except Exception as ex:
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log.error('Unable to start daemon!')
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log.exception(ex)
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return False
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else:
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return True
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def is_localhost(self):
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"""
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Checks if the current connected host is a localhost or not.
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:returns: bool, True if connected to a localhost
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"""
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if (self._daemon_proxy and self._daemon_proxy.host in ('127.0.0.1', 'localhost') or
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isinstance(self._daemon_proxy, DaemonStandaloneProxy)):
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return True
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return False
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def is_standalone(self):
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"""
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Checks to see if the client has been started in standalone mode.
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:returns: bool, True if in standalone mode
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"""
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return self.__started_standalone
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@deprecated
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def is_classicmode(self):
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"""Deprecated: Use is_standalone"""
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self.is_standalone()
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def connected(self):
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"""
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Check to see if connected to a daemon.
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:returns: bool, True if connected
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"""
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return self._daemon_proxy.connected if self._daemon_proxy else False
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def connection_info(self):
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"""
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Get some info about the connection or return None if not connected.
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:returns: a tuple of (host, port, username) or None if not connected
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"""
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if self.connected():
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return (self._daemon_proxy.host, self._daemon_proxy.port, self._daemon_proxy.username)
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return None
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def register_event_handler(self, event, handler):
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"""
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Registers a handler that will be called when an event is received from the daemon.
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:params event: str, the event to handle
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:params handler: func, the handler function, f(args)
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"""
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if event not in self.__event_handlers:
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self.__event_handlers[event] = []
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self.__event_handlers[event].append(handler)
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# We need to replicate this in the daemon proxy
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if self._daemon_proxy:
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self._daemon_proxy.register_event_handler(event, handler)
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def deregister_event_handler(self, event, handler):
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"""
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Deregisters a event handler.
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:param event: str, the name of the event
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:param handler: function, the function registered
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"""
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if event in self.__event_handlers and handler in self.__event_handlers[event]:
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self.__event_handlers[event].remove(handler)
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if self._daemon_proxy:
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self._daemon_proxy.deregister_event_handler(event, handler)
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def force_call(self, block=False):
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# no-op for now.. we'll see if we need this in the future
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pass
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def __getattr__(self, method):
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return DottedObject(self._daemon_proxy, method)
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def set_disconnect_callback(self, cb):
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"""
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Set a function to be called whenever the client is disconnected from
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the daemon for any reason.
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"""
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self.disconnect_callback = cb
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def __on_disconnect(self):
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if self.disconnect_callback:
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self.disconnect_callback()
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def get_bytes_recv(self):
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"""
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Returns the number of bytes received from the daemon.
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:returns: the number of bytes received
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:rtype: int
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"""
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return self._daemon_proxy.get_bytes_recv()
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def get_bytes_sent(self):
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"""
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Returns the number of bytes sent to the daemon.
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:returns: the number of bytes sent
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:rtype: int
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"""
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return self._daemon_proxy.get_bytes_sent()
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def get_auth_user(self):
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"""
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Returns the current authenticated username.
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:returns: the authenticated username
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:rtype: str
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"""
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return self._daemon_proxy.username
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def get_auth_level(self):
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"""
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Returns the authentication level the daemon returned upon authentication.
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:returns: the authentication level
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:rtype: int
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"""
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return self._daemon_proxy.authentication_level
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@property
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def auth_levels_mapping(self):
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return self._daemon_proxy.auth_levels_mapping
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@property
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def auth_levels_mapping_reverse(self):
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return self._daemon_proxy.auth_levels_mapping_reverse
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# This is the object clients will use
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client = Client()
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