mirror of https://github.com/evilhero/mylar
323 lines
11 KiB
Python
323 lines
11 KiB
Python
# Copyright (c) 2013 Chris Lucas, <chris@chrisjlucas.com>
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# Permission is hereby granted, free of charge, to any person obtaining
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# a copy of this software and associated documentation files (the
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# "Software"), to deal in the Software without restriction, including
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# without limitation the rights to use, copy, modify, merge, publish,
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# distribute, sublicense, and/or sell copies of the Software, and to
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# permit persons to whom the Software is furnished to do so, subject to
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# the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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# LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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# WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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import inspect
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import rtorrent
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import re
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from rtorrent.common import bool_to_int, convert_version_tuple_to_str,\
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safe_repr
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from rtorrent.err import MethodError
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from rtorrent.compat import xmlrpclib
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def get_varname(rpc_call):
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"""Transform rpc method into variable name.
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@newfield example: Example
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@example: if the name of the rpc method is 'p.get_down_rate', the variable
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name will be 'down_rate'
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"""
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# extract variable name from xmlrpc func name
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r = re.search(
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"([ptdf]\.|system\.|get\_|is\_|set\_)+([^=]*)", rpc_call, re.I)
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if r:
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if rtorrent.connection.Connection._get_client_version_tuple >= .97:
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return(r.groups()[-1].replace(".","_"))
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else:
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return(r.groups()[-1])
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else:
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return(None)
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def _handle_unavailable_rpc_method(method, rt_obj):
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msg = "Method " + str(method) + "isn't available."
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if rt_obj.connection._get_client_version_tuple() < method.min_version:
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msg = "This method is only available in " \
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"RTorrent version v{0} or later".format(
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convert_version_tuple_to_str(method.min_version))
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raise MethodError(msg)
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class DummyClass:
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def __init__(self):
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pass
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class Method:
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"""Represents an individual RPC method"""
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def __init__(self, _class, method_name,
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rpc_call, docstring=None, varname=None, **kwargs):
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self._class = _class # : Class this method is associated with
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self.class_name = _class.__name__
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self.method_name = method_name # : name of public-facing method
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self.rpc_call = rpc_call # : name of rpc method
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self.docstring = docstring # : docstring for rpc method (optional)
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self.varname = varname # : variable for the result of the method call, usually set to self.varname
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self.min_version = kwargs.get("min_version", (
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0, 0, 0)) # : Minimum version of rTorrent required
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self.boolean = kwargs.get("boolean", False) # : returns boolean value?
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self.post_process_func = kwargs.get(
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"post_process_func", None) # : custom post process function
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self.aliases = kwargs.get(
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"aliases", []) # : aliases for method (optional)
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self.required_args = []
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#: Arguments required when calling the method (not utilized)
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self.method_type = self._get_method_type()
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if self.varname is None:
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self.varname = get_varname(self.rpc_call)
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assert self.varname is not None, "Couldn't get variable name."
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def __repr__(self):
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return safe_repr("Method(method_name='{0}', rpc_call='{1}')",
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self.method_name, self.rpc_call)
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def _get_method_type(self):
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"""Determine whether method is a modifier or a retriever"""
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if self.method_name[:4] == "set_" or self.method_name[-4:] == ".set": return('m') # modifier
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else:
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return('r') # retriever
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def is_modifier(self):
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if self.method_type == 'm':
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return(True)
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else:
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return(False)
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def is_retriever(self):
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if self.method_type == 'r':
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return(True)
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else:
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return(False)
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def is_available(self, rt_obj):
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if rt_obj.connection._get_client_version_tuple() < self.min_version or \
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self.rpc_call not in rt_obj.connection._get_rpc_methods():
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return(False)
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else:
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return(True)
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class Multicall:
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def __init__(self, class_obj, **kwargs):
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self.class_obj = class_obj
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if class_obj.__class__.__name__ == "RTorrent":
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self.rt_obj = class_obj
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else:
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self.rt_obj = class_obj._rt_obj
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self.calls = []
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def add(self, method, *args):
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"""Add call to multicall
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@param method: L{Method} instance or name of raw RPC method
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@type method: Method or str
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@param args: call arguments
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"""
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# if a raw rpc method was given instead of a Method instance,
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# try and find the instance for it. And if all else fails, create a
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# dummy Method instance
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if isinstance(method, str):
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result = find_method(method)
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# if result not found
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if result == -1:
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method = Method(DummyClass, method, method)
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else:
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method = result
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# ensure method is available before adding
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if not method.is_available(self.rt_obj):
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_handle_unavailable_rpc_method(method, self.rt_obj)
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self.calls.append((method, args))
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def list_calls(self):
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for c in self.calls:
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print(c)
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def call(self):
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"""Execute added multicall calls
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@return: the results (post-processed), in the order they were added
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@rtype: tuple
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"""
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m = xmlrpclib.MultiCall(self.rt_obj._get_conn())
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for call in self.calls:
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method, args = call
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rpc_call = getattr(method, "rpc_call")
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getattr(m, rpc_call)(*args)
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results = m()
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results = tuple(results)
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results_processed = []
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for r, c in zip(results, self.calls):
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method = c[0] # Method instance
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result = process_result(method, r)
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results_processed.append(result)
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# assign result to class_obj
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exists = hasattr(self.class_obj, method.varname)
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if not exists or not inspect.ismethod(getattr(self.class_obj, method.varname)):
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setattr(self.class_obj, method.varname, result)
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return(tuple(results_processed))
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def call_method(class_obj, method, *args):
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"""Handles single RPC calls
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@param class_obj: Peer/File/Torrent/Tracker/RTorrent instance
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@type class_obj: object
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@param method: L{Method} instance or name of raw RPC method
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@type method: Method or str
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"""
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if method.is_retriever():
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args = args[:-1]
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else:
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assert args[-1] is not None, "No argument given."
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if class_obj.__class__.__name__ == "RTorrent":
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rt_obj = class_obj
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else:
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rt_obj = class_obj._rt_obj
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# check if rpc method is even available
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if not method.is_available(rt_obj):
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_handle_unavailable_rpc_method(method, rt_obj)
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m = Multicall(class_obj)
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m.add(method, *args)
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# only added one method, only getting one result back
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ret_value = m.call()[0]
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####### OBSOLETE ##########################################################
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# if method.is_retriever():
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# #value = process_result(method, ret_value)
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# value = ret_value #MultiCall already processed the result
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# else:
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# # we're setting the user's input to method.varname
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# # but we'll return the value that xmlrpc gives us
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# value = process_result(method, args[-1])
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##########################################################################
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return(ret_value)
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def find_method(rpc_call):
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"""Return L{Method} instance associated with given RPC call"""
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method_lists = [
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rtorrent.methods,
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rtorrent.file.methods,
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rtorrent.tracker.methods,
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rtorrent.peer.methods,
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rtorrent.torrent.methods,
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]
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for l in method_lists:
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for m in l:
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if m.rpc_call.lower() == rpc_call.lower():
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return(m)
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return(-1)
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def process_result(method, result):
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"""Process given C{B{result}} based on flags set in C{B{method}}
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@param method: L{Method} instance
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@type method: Method
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@param result: result to be processed (the result of given L{Method} instance)
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@note: Supported Processing:
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- boolean - convert ones and zeros returned by rTorrent and
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convert to python boolean values
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"""
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# handle custom post processing function
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if method.post_process_func is not None:
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result = method.post_process_func(result)
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# is boolean?
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if method.boolean:
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if result in [1, '1']:
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result = True
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elif result in [0, '0']:
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result = False
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return(result)
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def _build_rpc_methods(class_, method_list):
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"""Build glorified aliases to raw RPC methods"""
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instance = None
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if not inspect.isclass(class_):
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instance = class_
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class_ = instance.__class__
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for m in method_list:
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class_name = m.class_name
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if class_name != class_.__name__:
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continue
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if class_name == "RTorrent":
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caller = lambda self, arg = None, method = m:\
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call_method(self, method, bool_to_int(arg))
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elif class_name == "Torrent":
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caller = lambda self, arg = None, method = m:\
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call_method(self, method, self.rpc_id,
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bool_to_int(arg))
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elif class_name in ["Tracker", "File"]:
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caller = lambda self, arg = None, method = m:\
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call_method(self, method, self.rpc_id,
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bool_to_int(arg))
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elif class_name == "Peer":
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caller = lambda self, arg = None, method = m:\
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call_method(self, method, self.rpc_id,
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bool_to_int(arg))
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elif class_name == "Group":
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caller = lambda arg = None, method = m: \
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call_method(instance, method, bool_to_int(arg))
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if m.docstring is None:
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m.docstring = ""
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# print(m)
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docstring = """{0}
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@note: Variable where the result for this method is stored: {1}.{2}""".format(
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m.docstring,
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class_name,
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m.varname)
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caller.__doc__ = docstring
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for method_name in [m.method_name] + list(m.aliases):
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if instance is None:
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setattr(class_, method_name, caller)
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else:
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setattr(instance, method_name, caller)
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