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Merge branch 'release'

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commit 273c99135dd33c91acb35a013d96435d8c369bb8 2 parents c7ad847 + ce810d6
@wuub wuub authored
View
10 config/Execnet/Default.sublime-commands
@@ -0,0 +1,10 @@
+[
+ {
+ "caption": "SublimeREPL: Execnet Python",
+ "command": "run_existing_window_command", "args":
+ {
+ "id": "repl_sublime_execnet",
+ "file": "config/Execnet/Main.sublime-menu"
+ }
+ }
+]
View
19 config/Execnet/Main.sublime-menu
@@ -0,0 +1,19 @@
+[
+ {
+ "id": "tools",
+ "children":
+ [{
+ "caption": "SublimeREPL",
+ "mnemonic": "r",
+ "id": "SublimeREPL",
+ "children":
+ [
+ {
+ "command": "execnet_virtualenv_repl",
+ "id": "repl_sublime_execnet",
+ "caption": "SublimeREPL: Python Execnet"
+ }
+ ]
+ }]
+ }
+]
View
26 execnet/__init__.py
@@ -0,0 +1,26 @@
+"""
+execnet: pure python lib for connecting to local and remote Python Interpreters.
+
+(c) 2012, Holger Krekel and others
+"""
+__version__ = '1.1'
+
+import execnet.apipkg
+
+execnet.apipkg.initpkg(__name__, {
+ 'PopenGateway': '.deprecated:PopenGateway',
+ 'SocketGateway': '.deprecated:SocketGateway',
+ 'SshGateway': '.deprecated:SshGateway',
+ 'makegateway': '.multi:makegateway',
+ 'HostNotFound': '.gateway_bootstrap:HostNotFound',
+ 'RemoteError': '.gateway_base:RemoteError',
+ 'TimeoutError': '.gateway_base:TimeoutError',
+ 'XSpec': '.xspec:XSpec',
+ 'Group': '.multi:Group',
+ 'MultiChannel': '.multi:MultiChannel',
+ 'RSync': '.rsync:RSync',
+ 'default_group': '.multi:default_group',
+ 'dumps': '.gateway_base:dumps',
+ 'loads': '.gateway_base:loads',
+ 'DataFormatError': '.gateway_base:DataFormatError',
+})
View
167 execnet/apipkg.py
@@ -0,0 +1,167 @@
+"""
+apipkg: control the exported namespace of a python package.
+
+see http://pypi.python.org/pypi/apipkg
+
+(c) holger krekel, 2009 - MIT license
+"""
+import os
+import sys
+from types import ModuleType
+
+__version__ = '1.2'
+
+def initpkg(pkgname, exportdefs, attr=dict()):
+ """ initialize given package from the export definitions. """
+ oldmod = sys.modules.get(pkgname)
+ d = {}
+ f = getattr(oldmod, '__file__', None)
+ if f:
+ f = os.path.abspath(f)
+ d['__file__'] = f
+ if hasattr(oldmod, '__version__'):
+ d['__version__'] = oldmod.__version__
+ if hasattr(oldmod, '__loader__'):
+ d['__loader__'] = oldmod.__loader__
+ if hasattr(oldmod, '__path__'):
+ d['__path__'] = [os.path.abspath(p) for p in oldmod.__path__]
+ if '__doc__' not in exportdefs and getattr(oldmod, '__doc__', None):
+ d['__doc__'] = oldmod.__doc__
+ d.update(attr)
+ if hasattr(oldmod, "__dict__"):
+ oldmod.__dict__.update(d)
+ mod = ApiModule(pkgname, exportdefs, implprefix=pkgname, attr=d)
+ sys.modules[pkgname] = mod
+
+def importobj(modpath, attrname):
+ module = __import__(modpath, None, None, ['__doc__'])
+ if not attrname:
+ return module
+
+ retval = module
+ names = attrname.split(".")
+ for x in names:
+ retval = getattr(retval, x)
+ return retval
+
+class ApiModule(ModuleType):
+ def __docget(self):
+ try:
+ return self.__doc
+ except AttributeError:
+ if '__doc__' in self.__map__:
+ return self.__makeattr('__doc__')
+ def __docset(self, value):
+ self.__doc = value
+ __doc__ = property(__docget, __docset)
+
+ def __init__(self, name, importspec, implprefix=None, attr=None):
+ self.__name__ = name
+ self.__all__ = [x for x in importspec if x != '__onfirstaccess__']
+ self.__map__ = {}
+ self.__implprefix__ = implprefix or name
+ if attr:
+ for name, val in attr.items():
+ #print "setting", self.__name__, name, val
+ setattr(self, name, val)
+ for name, importspec in importspec.items():
+ if isinstance(importspec, dict):
+ subname = '%s.%s'%(self.__name__, name)
+ apimod = ApiModule(subname, importspec, implprefix)
+ sys.modules[subname] = apimod
+ setattr(self, name, apimod)
+ else:
+ parts = importspec.split(':')
+ modpath = parts.pop(0)
+ attrname = parts and parts[0] or ""
+ if modpath[0] == '.':
+ modpath = implprefix + modpath
+
+ if not attrname:
+ subname = '%s.%s'%(self.__name__, name)
+ apimod = AliasModule(subname, modpath)
+ sys.modules[subname] = apimod
+ if '.' not in name:
+ setattr(self, name, apimod)
+ else:
+ self.__map__[name] = (modpath, attrname)
+
+ def __repr__(self):
+ l = []
+ if hasattr(self, '__version__'):
+ l.append("version=" + repr(self.__version__))
+ if hasattr(self, '__file__'):
+ l.append('from ' + repr(self.__file__))
+ if l:
+ return '<ApiModule %r %s>' % (self.__name__, " ".join(l))
+ return '<ApiModule %r>' % (self.__name__,)
+
+ def __makeattr(self, name):
+ """lazily compute value for name or raise AttributeError if unknown."""
+ #print "makeattr", self.__name__, name
+ target = None
+ if '__onfirstaccess__' in self.__map__:
+ target = self.__map__.pop('__onfirstaccess__')
+ importobj(*target)()
+ try:
+ modpath, attrname = self.__map__[name]
+ except KeyError:
+ if target is not None and name != '__onfirstaccess__':
+ # retry, onfirstaccess might have set attrs
+ return getattr(self, name)
+ raise AttributeError(name)
+ else:
+ result = importobj(modpath, attrname)
+ setattr(self, name, result)
+ try:
+ del self.__map__[name]
+ except KeyError:
+ pass # in a recursive-import situation a double-del can happen
+ return result
+
+ __getattr__ = __makeattr
+
+ def __dict__(self):
+ # force all the content of the module to be loaded when __dict__ is read
+ dictdescr = ModuleType.__dict__['__dict__']
+ dict = dictdescr.__get__(self)
+ if dict is not None:
+ hasattr(self, 'some')
+ for name in self.__all__:
+ try:
+ self.__makeattr(name)
+ except AttributeError:
+ pass
+ return dict
+ __dict__ = property(__dict__)
+
+
+def AliasModule(modname, modpath, attrname=None):
+ mod = []
+
+ def getmod():
+ if not mod:
+ x = importobj(modpath, None)
+ if attrname is not None:
+ x = getattr(x, attrname)
+ mod.append(x)
+ return mod[0]
+
+ class AliasModule(ModuleType):
+
+ def __repr__(self):
+ x = modpath
+ if attrname:
+ x += "." + attrname
+ return '<AliasModule %r for %r>' % (modname, x)
+
+ def __getattribute__(self, name):
+ return getattr(getmod(), name)
+
+ def __setattr__(self, name, value):
+ setattr(getmod(), name, value)
+
+ def __delattr__(self, name):
+ delattr(getmod(), name)
+
+ return AliasModule(modname)
View
43 execnet/deprecated.py
@@ -0,0 +1,43 @@
+"""
+some deprecated calls
+
+(c) 2008-2009, Holger Krekel and others
+"""
+import execnet
+
+def PopenGateway(python=None):
+ """ instantiate a gateway to a subprocess
+ started with the given 'python' executable.
+ """
+ APIWARN("1.0.0b4", "use makegateway('popen')")
+ spec = execnet.XSpec("popen")
+ spec.python = python
+ return execnet.default_group.makegateway(spec)
+
+def SocketGateway(host, port):
+ """ This Gateway provides interaction with a remote process
+ by connecting to a specified socket. On the remote
+ side you need to manually start a small script
+ (py/execnet/script/socketserver.py) that accepts
+ SocketGateway connections or use the experimental
+ new_remote() method on existing gateways.
+ """
+ APIWARN("1.0.0b4", "use makegateway('socket=host:port')")
+ spec = execnet.XSpec("socket=%s:%s" %(host, port))
+ return execnet.default_group.makegateway(spec)
+
+def SshGateway(sshaddress, remotepython=None, ssh_config=None):
+ """ instantiate a remote ssh process with the
+ given 'sshaddress' and remotepython version.
+ you may specify an ssh_config file.
+ """
+ APIWARN("1.0.0b4", "use makegateway('ssh=host')")
+ spec = execnet.XSpec("ssh=%s" % sshaddress)
+ spec.python = remotepython
+ spec.ssh_config = ssh_config
+ return execnet.default_group.makegateway(spec)
+
+def APIWARN(version, msg, stacklevel=3):
+ import warnings
+ Warn = DeprecationWarning("(since version %s) %s" %(version, msg))
+ warnings.warn(Warn, stacklevel=stacklevel)
View
211 execnet/gateway.py
@@ -0,0 +1,211 @@
+"""
+gateway code for initiating popen, socket and ssh connections.
+(c) 2004-2009, Holger Krekel and others
+"""
+
+import sys, os, inspect, types, linecache
+import textwrap
+import execnet
+from execnet.gateway_base import Message
+from execnet.gateway_io import Popen2IOMaster
+from execnet import gateway_base
+importdir = os.path.dirname(os.path.dirname(execnet.__file__))
+
+class Gateway(gateway_base.BaseGateway):
+ """ Gateway to a local or remote Python Intepreter. """
+
+ def __init__(self, io, id):
+ super(Gateway, self).__init__(io=io, id=id, _startcount=1)
+ self._initreceive()
+
+ @property
+ def remoteaddress(self):
+ return self._io.remoteaddress
+
+ def __repr__(self):
+ """ return string representing gateway type and status. """
+ try:
+ r = (self.hasreceiver() and 'receive-live' or 'not-receiving')
+ i = len(self._channelfactory.channels())
+ except AttributeError:
+ r = "uninitialized"
+ i = "no"
+ return "<%s id=%r %s, %s active channels>" %(
+ self.__class__.__name__, self.id, r, i)
+
+ def exit(self):
+ """ trigger gateway exit. Defer waiting for finishing
+ of receiver-thread and subprocess activity to when
+ group.terminate() is called.
+ """
+ self._trace("gateway.exit() called")
+ if self not in self._group:
+ self._trace("gateway already unregistered with group")
+ return
+ self._group._unregister(self)
+ self._trace("--> sending GATEWAY_TERMINATE")
+ try:
+ self._send(Message.GATEWAY_TERMINATE)
+ self._io.close_write()
+ except IOError:
+ v = sys.exc_info()[1]
+ self._trace("io-error: could not send termination sequence")
+ self._trace(" exception: %r" % v)
+
+ def reconfigure(self, py2str_as_py3str=True, py3str_as_py2str=False):
+ """
+ set the string coercion for this gateway
+ the default is to try to convert py2 str as py3 str,
+ but not to try and convert py3 str to py2 str
+ """
+ self._strconfig = (py2str_as_py3str, py3str_as_py2str)
+ data = gateway_base.dumps_internal(self._strconfig)
+ self._send(Message.RECONFIGURE, data=data)
+
+
+ def _rinfo(self, update=False):
+ """ return some sys/env information from remote. """
+ if update or not hasattr(self, '_cache_rinfo'):
+ ch = self.remote_exec(rinfo_source)
+ self._cache_rinfo = RInfo(ch.receive())
+ return self._cache_rinfo
+
+ def hasreceiver(self):
+ """ return True if gateway is able to receive data. """
+ return self._receiverthread.isAlive() # approxmimation
+
+ def remote_status(self):
+ """ return information object about remote execution status. """
+ channel = self.newchannel()
+ self._send(Message.STATUS, channel.id)
+ statusdict = channel.receive()
+ # the other side didn't actually instantiate a channel
+ # so we just delete the internal id/channel mapping
+ self._channelfactory._local_close(channel.id)
+ return RemoteStatus(statusdict)
+
+ def remote_exec(self, source, **kwargs):
+ """ return channel object and connect it to a remote
+ execution thread where the given ``source`` executes.
+
+ * ``source`` is a string: execute source string remotely
+ with a ``channel`` put into the global namespace.
+ * ``source`` is a pure function: serialize source and
+ call function with ``**kwargs``, adding a
+ ``channel`` object to the keyword arguments.
+ * ``source`` is a pure module: execute source of module
+ with a ``channel`` in its global namespace
+
+ In all cases the binding ``__name__='__channelexec__'``
+ will be available in the global namespace of the remotely
+ executing code.
+ """
+ call_name = None
+ if isinstance(source, types.ModuleType):
+ linecache.updatecache(inspect.getsourcefile(source))
+ source = inspect.getsource(source)
+ elif isinstance(source, types.FunctionType):
+ call_name = source.__name__
+ source = _source_of_function(source)
+ else:
+ source = textwrap.dedent(str(source))
+
+ if call_name is None and kwargs:
+ raise TypeError("can't pass kwargs to non-function remote_exec")
+
+ channel = self.newchannel()
+ self._send(Message.CHANNEL_EXEC,
+ channel.id,
+ gateway_base.dumps_internal((source, call_name, kwargs)))
+ return channel
+
+ def remote_init_threads(self, num=None):
+ """ start up to 'num' threads for subsequent
+ remote_exec() invocations to allow concurrent
+ execution.
+ """
+ if hasattr(self, '_remotechannelthread'):
+ raise IOError("remote threads already running")
+ from execnet import threadpool
+ source = inspect.getsource(threadpool)
+ self._remotechannelthread = self.remote_exec(source)
+ self._remotechannelthread.send(num)
+ status = self._remotechannelthread.receive()
+ assert status == "ok", status
+
+class RInfo:
+ def __init__(self, kwargs):
+ self.__dict__.update(kwargs)
+
+ def __repr__(self):
+ info = ", ".join(["%s=%s" % item
+ for item in self.__dict__.items()])
+ return "<RInfo %r>" % info
+
+RemoteStatus = RInfo
+
+def rinfo_source(channel):
+ import sys, os
+ channel.send(dict(
+ executable = sys.executable,
+ version_info = sys.version_info[:5],
+ platform = sys.platform,
+ cwd = os.getcwd(),
+ pid = os.getpid(),
+ ))
+
+
+def _find_non_builtin_globals(source, codeobj):
+ try:
+ import ast
+ except ImportError:
+ return None
+ try:
+ import __builtin__
+ except ImportError:
+ import builtins as __builtin__
+
+ vars = dict.fromkeys(codeobj.co_varnames)
+ all = []
+ for node in ast.walk(ast.parse(source)):
+ if (isinstance(node, ast.Name) and node.id not in vars and
+ node.id not in __builtin__.__dict__):
+ all.append(node.id)
+ return all
+
+
+def _source_of_function(function):
+ if function.__name__ == '<lambda>':
+ raise ValueError("can't evaluate lambda functions'")
+ #XXX: we dont check before remote instanciation
+ # if arguments are used propperly
+ args, varargs, keywords, defaults = inspect.getargspec(function)
+ if args[0] != 'channel':
+ raise ValueError('expected first function argument to be `channel`')
+
+ if sys.version_info < (3,0):
+ closure = function.func_closure
+ codeobj = function.func_code
+ else:
+ closure = function.__closure__
+ codeobj = function.__code__
+
+ if closure is not None:
+ raise ValueError("functions with closures can't be passed")
+
+ try:
+ source = inspect.getsource(function)
+ except IOError:
+ raise ValueError("can't find source file for %s" % function)
+
+ source = textwrap.dedent(source) # just for inner functions
+
+ used_globals = _find_non_builtin_globals(source, codeobj)
+ if used_globals:
+ raise ValueError(
+ "the use of non-builtin globals isn't supported",
+ used_globals,
+ )
+
+ return source
+
View
1,215 execnet/gateway_base.py
@@ -0,0 +1,1215 @@
+"""
+base execnet gateway code send to the other side for bootstrapping.
+
+NOTE: aims to be compatible to Python 2.3-3.1, Jython and IronPython
+
+(C) 2004-2009 Holger Krekel, Armin Rigo, Benjamin Peterson, and others
+"""
+import sys, os, weakref
+import threading, traceback, struct
+try:
+ import queue
+except ImportError:
+ import Queue as queue
+
+try:
+ from io import BytesIO
+except:
+ from StringIO import StringIO as BytesIO
+
+ISPY3 = sys.version_info >= (3, 0)
+if ISPY3:
+ exec("def do_exec(co, loc): exec(co, loc)\n"
+ "def reraise(cls, val, tb): raise val\n")
+ unicode = str
+ _long_type = int
+ from _thread import interrupt_main
+else:
+ exec("def do_exec(co, loc): exec co in loc\n"
+ "def reraise(cls, val, tb): raise cls, val, tb\n")
+ bytes = str
+ _long_type = long
+ try:
+ from thread import interrupt_main
+ except ImportError:
+ interrupt_main = None
+
+sysex = (KeyboardInterrupt, SystemExit)
+
+
+DEBUG = os.environ.get('EXECNET_DEBUG')
+pid = os.getpid()
+if DEBUG == '2':
+ def trace(*msg):
+ try:
+ line = " ".join(map(str, msg))
+ sys.stderr.write("[%s] %s\n" % (pid, line))
+ sys.stderr.flush()
+ except Exception:
+ pass # nothing we can do, likely interpreter-shutdown
+elif DEBUG:
+ import tempfile, os.path
+ fn = os.path.join(tempfile.gettempdir(), 'execnet-debug-%d' % pid)
+ #sys.stderr.write("execnet-debug at %r" %(fn,))
+ debugfile = open(fn, 'w')
+ def trace(*msg):
+ try:
+ line = " ".join(map(str, msg))
+ debugfile.write(line + "\n")
+ debugfile.flush()
+ except Exception:
+ try:
+ v = sys.exc_info()[1]
+ sys.stderr.write(
+ "[%s] exception during tracing: %r\n" % (pid, v))
+ except Exception:
+ pass # nothing we can do, likely interpreter-shutdown
+else:
+ notrace = trace = lambda *msg: None
+
+class Popen2IO:
+ error = (IOError, OSError, EOFError)
+
+ def __init__(self, outfile, infile):
+ # we need raw byte streams
+ self.outfile, self.infile = outfile, infile
+ if sys.platform == "win32":
+ import msvcrt
+ try:
+ msvcrt.setmode(infile.fileno(), os.O_BINARY)
+ msvcrt.setmode(outfile.fileno(), os.O_BINARY)
+ except (AttributeError, IOError):
+ pass
+ self._read = getattr(infile, "buffer", infile).read
+ self._write = getattr(outfile, "buffer", outfile).write
+
+ def read(self, numbytes):
+ """Read exactly 'numbytes' bytes from the pipe. """
+ # a file in non-blocking mode may return less bytes, so we loop
+ buf = bytes()
+ while numbytes > len(buf):
+ data = self._read(numbytes-len(buf))
+ if not data:
+ raise EOFError("expected %d bytes, got %d" %(numbytes, len(buf)))
+ buf += data
+ return buf
+
+ def write(self, data):
+ """write out all data bytes. """
+ assert isinstance(data, bytes)
+ self._write(data)
+ self.outfile.flush()
+
+ def close_read(self):
+ self.infile.close()
+
+ def close_write(self):
+ self.outfile.close()
+
+class Message:
+ """ encapsulates Messages and their wire protocol. """
+ _types = []
+
+ def __init__(self, msgcode, channelid=0, data=''):
+ self.msgcode = msgcode
+ self.channelid = channelid
+ self.data = data
+
+ @staticmethod
+ def from_io(io):
+ try:
+ header = io.read(9) # type 1, channel 4, payload 4
+ except EOFError:
+ e = sys.exc_info()[1]
+ raise EOFError('couldnt load message header, ' + e.args[0])
+ msgtype, channel, payload = struct.unpack('!bii', header)
+ return Message(msgtype, channel, io.read(payload))
+
+ def to_io(self, io):
+ header = struct.pack('!bii', self.msgcode, self.channelid, len(self.data))
+ io.write(header+self.data)
+
+ def received(self, gateway):
+ self._types[self.msgcode](self, gateway)
+
+ def __repr__(self):
+ class FakeChannel(object):
+ _strconfig = False, False # never transform, never fail
+ def __init__(self, id):
+ self.id = id
+ def __repr__(self):
+ return '<Channel %s>' % self.id
+ FakeChannel.new = FakeChannel
+ FakeChannel.gateway = FakeChannel
+ name = self._types[self.msgcode].__name__.upper()
+ try:
+ data = loads_internal(self.data, FakeChannel)
+ except LoadError:
+ data = self.data
+ r = repr(data)
+ if len(r) > 90:
+ return "<Message.%s channelid=%d len=%d>" %(name,
+ self.channelid, len(r))
+ else:
+ return "<Message.%s channelid=%d %s>" %(name,
+ self.channelid, r)
+
+def _setupmessages():
+ def status(message, gateway):
+ # we use the channelid to send back information
+ # but don't instantiate a channel object
+ active_channels = gateway._channelfactory.channels()
+ numexec = 0
+ for ch in active_channels:
+ if getattr(ch, '_executing', False):
+ numexec += 1
+ d = {'execqsize': gateway._execqueue.qsize(),
+ 'numchannels': len(active_channels),
+ 'numexecuting': numexec
+ }
+ gateway._send(Message.CHANNEL_DATA, message.channelid, dumps_internal(d))
+
+ def channel_exec(message, gateway):
+ channel = gateway._channelfactory.new(message.channelid)
+ gateway._local_schedulexec(channel=channel,sourcetask=message.data)
+
+ def channel_data(message, gateway):
+ gateway._channelfactory._local_receive(message.channelid, message.data)
+
+ def channel_close(message, gateway):
+ gateway._channelfactory._local_close(message.channelid)
+
+ def channel_close_error(message, gateway):
+ remote_error = RemoteError(loads_internal(message.data))
+ gateway._channelfactory._local_close(message.channelid, remote_error)
+
+ def channel_last_message(message, gateway):
+ gateway._channelfactory._local_close(message.channelid, sendonly=True)
+
+ def gateway_terminate(message, gateway):
+ gateway._terminate_execution()
+ raise SystemExit(0)
+
+ def reconfigure(message, gateway):
+ if message.channelid == 0:
+ target = gateway
+ else:
+ target = gateway._channelfactory.new(message.channelid)
+ target._strconfig = loads_internal(message.data, gateway)
+
+ types = [
+ status, reconfigure, gateway_terminate,
+ channel_exec, channel_data, channel_close,
+ channel_close_error, channel_last_message,
+ ]
+ for i, handler in enumerate(types):
+ Message._types.append(handler)
+ setattr(Message, handler.__name__.upper(), i)
+
+_setupmessages()
+
+def geterrortext(excinfo,
+ format_exception=traceback.format_exception, sysex=sysex):
+ try:
+ l = format_exception(*excinfo)
+ errortext = "".join(l)
+ except sysex:
+ raise
+ except:
+ errortext = '%s: %s' % (excinfo[0].__name__,
+ excinfo[1])
+ return errortext
+
+class RemoteError(Exception):
+ """ Exception containing a stringified error from the other side. """
+ def __init__(self, formatted):
+ self.formatted = formatted
+ Exception.__init__(self)
+
+ def __str__(self):
+ return self.formatted
+
+ def __repr__(self):
+ return "%s: %s" %(self.__class__.__name__, self.formatted)
+
+ def warn(self):
+ if self.formatted != INTERRUPT_TEXT:
+ # XXX do this better
+ sys.stderr.write("Warning: unhandled %r\n" % (self,))
+
+class TimeoutError(IOError):
+ """ Exception indicating that a timeout was reached. """
+
+
+NO_ENDMARKER_WANTED = object()
+
+class Channel(object):
+ """Communication channel between two Python Interpreter execution points."""
+ RemoteError = RemoteError
+ TimeoutError = TimeoutError
+ _INTERNALWAKEUP = 1000
+ _executing = False
+
+ def __init__(self, gateway, id):
+ assert isinstance(id, int)
+ self.gateway = gateway
+ #XXX: defaults copied from Unserializer
+ self._strconfig = getattr(gateway, '_strconfig', (True, False))
+ self.id = id
+ self._items = queue.Queue()
+ self._closed = False
+ self._receiveclosed = threading.Event()
+ self._remoteerrors = []
+
+ def _trace(self, *msg):
+ self.gateway._trace(self.id, *msg)
+
+ def setcallback(self, callback, endmarker=NO_ENDMARKER_WANTED):
+ """ set a callback function for receiving items.
+
+ All already queued items will immediately trigger the callback.
+ Afterwards the callback will execute in the receiver thread
+ for each received data item and calls to ``receive()`` will
+ raise an error.
+ If an endmarker is specified the callback will eventually
+ be called with the endmarker when the channel closes.
+ """
+ _callbacks = self.gateway._channelfactory._callbacks
+ _receivelock = self.gateway._receivelock
+ _receivelock.acquire()
+ try:
+ if self._items is None:
+ raise IOError("%r has callback already registered" %(self,))
+ items = self._items
+ self._items = None
+ while 1:
+ try:
+ olditem = items.get(block=False)
+ except queue.Empty:
+ if not (self._closed or self._receiveclosed.isSet()):
+ _callbacks[self.id] = (
+ callback,
+ endmarker,
+ self._strconfig,
+ )
+ break
+ else:
+ if olditem is ENDMARKER:
+ items.put(olditem) # for other receivers
+ if endmarker is not NO_ENDMARKER_WANTED:
+ callback(endmarker)
+ break
+ else:
+ callback(olditem)
+ finally:
+ _receivelock.release()
+
+ def __repr__(self):
+ flag = self.isclosed() and "closed" or "open"
+ return "<Channel id=%d %s>" % (self.id, flag)
+
+ def __del__(self):
+ if self.gateway is None: # can be None in tests
+ return
+ self._trace("channel.__del__")
+ # no multithreading issues here, because we have the last ref to 'self'
+ if self._closed:
+ # state transition "closed" --> "deleted"
+ for error in self._remoteerrors:
+ error.warn()
+ elif self._receiveclosed.isSet():
+ # state transition "sendonly" --> "deleted"
+ # the remote channel is already in "deleted" state, nothing to do
+ pass
+ else:
+ # state transition "opened" --> "deleted"
+ if self._items is None: # has_callback
+ msgcode = Message.CHANNEL_LAST_MESSAGE
+ else:
+ msgcode = Message.CHANNEL_CLOSE
+ try:
+ self.gateway._send(msgcode, self.id)
+ except (IOError, ValueError): # ignore problems with sending
+ pass
+
+ def _getremoteerror(self):
+ try:
+ return self._remoteerrors.pop(0)
+ except IndexError:
+ try:
+ return self.gateway._error
+ except AttributeError:
+ pass
+ return None
+
+ #
+ # public API for channel objects
+ #
+ def isclosed(self):
+ """ return True if the channel is closed. A closed
+ channel may still hold items.
+ """
+ return self._closed
+
+ def makefile(self, mode='w', proxyclose=False):
+ """ return a file-like object.
+ mode can be 'w' or 'r' for writeable/readable files.
+ if proxyclose is true file.close() will also close the channel.
+ """
+ if mode == "w":
+ return ChannelFileWrite(channel=self, proxyclose=proxyclose)
+ elif mode == "r":
+ return ChannelFileRead(channel=self, proxyclose=proxyclose)
+ raise ValueError("mode %r not availabe" %(mode,))
+
+ def close(self, error=None):
+ """ close down this channel with an optional error message.
+ Note that closing of a channel tied to remote_exec happens
+ automatically at the end of execution and cannot be done explicitely.
+ """
+ if self._executing:
+ raise IOError("cannot explicitly close channel within remote_exec")
+ if self._closed:
+ self.gateway._trace(self, "ignoring redundant call to close()")
+ if not self._closed:
+ # state transition "opened/sendonly" --> "closed"
+ # threads warning: the channel might be closed under our feet,
+ # but it's never damaging to send too many CHANNEL_CLOSE messages
+ # however, if the other side triggered a close already, we
+ # do not send back a closed message.
+ if not self._receiveclosed.isSet():
+ put = self.gateway._send
+ if error is not None:
+ put(Message.CHANNEL_CLOSE_ERROR, self.id, dumps_internal(error))
+ else:
+ put(Message.CHANNEL_CLOSE, self.id)
+ self._trace("sent channel close message")
+ if isinstance(error, RemoteError):
+ self._remoteerrors.append(error)
+ self._closed = True # --> "closed"
+ self._receiveclosed.set()
+ queue = self._items
+ if queue is not None:
+ queue.put(ENDMARKER)
+ self.gateway._channelfactory._no_longer_opened(self.id)
+
+ def waitclose(self, timeout=None):
+ """ wait until this channel is closed (or the remote side
+ otherwise signalled that no more data was being sent).
+ The channel may still hold receiveable items, but not receive
+ any more after waitclose() has returned. Exceptions from executing
+ code on the other side are reraised as local channel.RemoteErrors.
+ EOFError is raised if the reading-connection was prematurely closed,
+ which often indicates a dying process.
+ self.TimeoutError is raised after the specified number of seconds
+ (default is None, i.e. wait indefinitely).
+ """
+ self._receiveclosed.wait(timeout=timeout) # wait for non-"opened" state
+ if not self._receiveclosed.isSet():
+ raise self.TimeoutError("Timeout after %r seconds" % timeout)
+ error = self._getremoteerror()
+ if error:
+ raise error
+
+ def send(self, item):
+ """sends the given item to the other side of the channel,
+ possibly blocking if the sender queue is full.
+ The item must be a simple python type and will be
+ copied to the other side by value. IOError is
+ raised if the write pipe was prematurely closed.
+ """
+ if self.isclosed():
+ raise IOError("cannot send to %r" %(self,))
+ self.gateway._send(Message.CHANNEL_DATA, self.id, dumps_internal(item))
+
+ def receive(self, timeout=-1):
+ """receive a data item that was sent from the other side.
+ timeout: -1 [default] blocked waiting, but wake up periodically
+ to let CTRL-C through. A positive number indicates the
+ number of seconds after which a channel.TimeoutError exception
+ will be raised if no item was received.
+ Note that exceptions from the remotely executing code will be
+ reraised as channel.RemoteError exceptions containing
+ a textual representation of the remote traceback.
+ """
+ itemqueue = self._items
+ if itemqueue is None:
+ raise IOError("cannot receive(), channel has receiver callback")
+ if timeout < 0:
+ internal_timeout = self._INTERNALWAKEUP
+ else:
+ internal_timeout = timeout
+
+ while 1:
+ try:
+ x = itemqueue.get(timeout=internal_timeout)
+ break
+ except queue.Empty:
+ if timeout < 0:
+ continue
+ raise self.TimeoutError("no item after %r seconds" %(timeout))
+ if x is ENDMARKER:
+ itemqueue.put(x) # for other receivers
+ raise self._getremoteerror() or EOFError()
+ else:
+ return x
+
+ def __iter__(self):
+ return self
+
+ def next(self):
+ try:
+ return self.receive()
+ except EOFError:
+ raise StopIteration
+ __next__ = next
+
+
+ def reconfigure(self, py2str_as_py3str=True, py3str_as_py2str=False):
+ """
+ set the string coercion for this channel
+ the default is to try to convert py2 str as py3 str,
+ but not to try and convert py3 str to py2 str
+ """
+ self._strconfig = (py2str_as_py3str, py3str_as_py2str)
+ data = dumps_internal(self._strconfig)
+ self.gateway._send(Message.RECONFIGURE, self.id, data=data)
+
+ENDMARKER = object()
+INTERRUPT_TEXT = "keyboard-interrupted"
+
+class ChannelFactory(object):
+ def __init__(self, gateway, startcount=1):
+ self._channels = weakref.WeakValueDictionary()
+ self._callbacks = {}
+ self._writelock = threading.Lock()
+ self.gateway = gateway
+ self.count = startcount
+ self.finished = False
+ self._list = list # needed during interp-shutdown
+
+ def new(self, id=None):
+ """ create a new Channel with 'id' (or create new id if None). """
+ self._writelock.acquire()
+ try:
+ if self.finished:
+ raise IOError("connexion already closed: %s" % (self.gateway,))
+ if id is None:
+ id = self.count
+ self.count += 2
+ try:
+ channel = self._channels[id]
+ except KeyError:
+ channel = self._channels[id] = Channel(self.gateway, id)
+ return channel
+ finally:
+ self._writelock.release()
+
+ def channels(self):
+ return self._list(self._channels.values())
+
+ #
+ # internal methods, called from the receiver thread
+ #
+ def _no_longer_opened(self, id):
+ try:
+ del self._channels[id]
+ except KeyError:
+ pass
+ try:
+ callback, endmarker, strconfig = self._callbacks.pop(id)
+ except KeyError:
+ pass
+ else:
+ if endmarker is not NO_ENDMARKER_WANTED:
+ callback(endmarker)
+
+ def _local_close(self, id, remoteerror=None, sendonly=False):
+ channel = self._channels.get(id)
+ if channel is None:
+ # channel already in "deleted" state
+ if remoteerror:
+ remoteerror.warn()
+ self._no_longer_opened(id)
+ else:
+ # state transition to "closed" state
+ if remoteerror:
+ channel._remoteerrors.append(remoteerror)
+ queue = channel._items
+ if queue is not None:
+ queue.put(ENDMARKER)
+ self._no_longer_opened(id)
+ if not sendonly: # otherwise #--> "sendonly"
+ channel._closed = True # --> "closed"
+ channel._receiveclosed.set()
+
+ def _local_receive(self, id, data):
+ # executes in receiver thread
+ try:
+ callback, endmarker, strconfig= self._callbacks[id]
+ channel = self._channels.get(id)
+ except KeyError:
+ channel = self._channels.get(id)
+ queue = channel and channel._items
+ if queue is None:
+ pass # drop data
+ else:
+ queue.put(loads_internal(data, channel))
+ else:
+ try:
+ data = loads_internal(data, channel, strconfig)
+ callback(data) # even if channel may be already closed
+ except KeyboardInterrupt:
+ raise
+ except:
+ excinfo = sys.exc_info()
+ self.gateway._trace("exception during callback: %s" % excinfo[1])
+ errortext = self.gateway._geterrortext(excinfo)
+ self.gateway._send(Message.CHANNEL_CLOSE_ERROR, id, dumps_internal(errortext))
+ self._local_close(id, errortext)
+
+ def _finished_receiving(self):
+ self._writelock.acquire()
+ try:
+ self.finished = True
+ finally:
+ self._writelock.release()
+ for id in self._list(self._channels):
+ self._local_close(id, sendonly=True)
+ for id in self._list(self._callbacks):
+ self._no_longer_opened(id)
+
+class ChannelFile(object):
+ def __init__(self, channel, proxyclose=True):
+ self.channel = channel
+ self._proxyclose = proxyclose
+
+ def isatty(self):
+ return False
+
+ def close(self):
+ if self._proxyclose:
+ self.channel.close()
+
+ def __repr__(self):
+ state = self.channel.isclosed() and 'closed' or 'open'
+ return '<ChannelFile %d %s>' %(self.channel.id, state)
+
+class ChannelFileWrite(ChannelFile):
+ def write(self, out):
+ self.channel.send(out)
+
+ def flush(self):
+ pass
+
+class ChannelFileRead(ChannelFile):
+ def __init__(self, channel, proxyclose=True):
+ super(ChannelFileRead, self).__init__(channel, proxyclose)
+ self._buffer = None
+
+ def read(self, n):
+ try:
+ if self._buffer is None:
+ self._buffer = self.channel.receive()
+ while len(self._buffer) < n:
+ self._buffer += self.channel.receive()
+ except EOFError:
+ self.close()
+ if self._buffer is None:
+ ret = ""
+ else:
+ ret = self._buffer[:n]
+ self._buffer = self._buffer[n:]
+ return ret
+
+ def readline(self):
+ if self._buffer is not None:
+ i = self._buffer.find("\n")
+ if i != -1:
+ return self.read(i+1)
+ line = self.read(len(self._buffer)+1)
+ else:
+ line = self.read(1)
+ while line and line[-1] != "\n":
+ c = self.read(1)
+ if not c:
+ break
+ line += c
+ return line
+
+class BaseGateway(object):
+ exc_info = sys.exc_info
+ _sysex = sysex
+ id = "<slave>"
+
+ class _StopExecLoop(Exception):
+ pass
+
+ def __init__(self, io, id, _startcount=2):
+ self._io = io
+ self.id = id
+ self._strconfig = Unserializer.py2str_as_py3str, Unserializer.py3str_as_py2str
+ self._channelfactory = ChannelFactory(self, _startcount)
+ self._receivelock = threading.RLock()
+ # globals may be NONE at process-termination
+ self.__trace = trace
+ self._geterrortext = geterrortext
+
+ def _trace(self, *msg):
+ self.__trace(self.id, *msg)
+
+ def _initreceive(self):
+ self._receiverthread = threading.Thread(name="receiver",
+ target=self._thread_receiver)
+ self._receiverthread.setDaemon(1)
+ self._receiverthread.start()
+
+ def _thread_receiver(self):
+ self._trace("RECEIVERTHREAD: starting to run")
+ eof = False
+ io = self._io
+ try:
+ try:
+ while 1:
+ msg = Message.from_io(io)
+ self._trace("received", msg)
+ _receivelock = self._receivelock
+ _receivelock.acquire()
+ try:
+ msg.received(self)
+ del msg
+ finally:
+ _receivelock.release()
+ except self._sysex:
+ self._trace("RECEIVERTHREAD: doing io.close_read()")
+ self._io.close_read()
+ except EOFError:
+ self._trace("RECEIVERTHREAD: got EOFError")
+ self._trace("RECEIVERTHREAD: traceback was: ",
+ self._geterrortext(self.exc_info()))
+ self._error = self.exc_info()[1]
+ eof = True
+ except:
+ self._trace("RECEIVERTHREAD", self._geterrortext(self.exc_info()))
+ finally:
+ try:
+ self._trace('RECEIVERTHREAD', 'entering finalization')
+ if eof:
+ self._terminate_execution()
+ self._channelfactory._finished_receiving()
+ self._trace('RECEIVERTHREAD', 'leaving finalization')
+ except:
+ pass # XXX be silent at interp-shutdown
+
+ def _terminate_execution(self):
+ pass
+
+ def _send(self, msgcode, channelid=0, data=bytes()):
+ message = Message(msgcode, channelid, data)
+ try:
+ message.to_io(self._io)
+ self._trace('sent', message)
+ except (IOError, ValueError):
+ e = sys.exc_info()[1]
+ self._trace('failed to send', message, e)
+ raise
+
+
+ def _local_schedulexec(self, channel, sourcetask):
+ channel.close("execution disallowed")
+
+ # _____________________________________________________________________
+ #
+ # High Level Interface
+ # _____________________________________________________________________
+ #
+ def newchannel(self):
+ """ return a new independent channel. """
+ return self._channelfactory.new()
+
+ def join(self, timeout=None):
+ """ Wait for receiverthread to terminate. """
+ current = threading.currentThread()
+ if self._receiverthread.isAlive():
+ self._trace("joining receiver thread")
+ self._receiverthread.join(timeout)
+ else:
+ self._trace("gateway.join() called while receiverthread "
+ "already finished")
+
+class SlaveGateway(BaseGateway):
+ def _local_schedulexec(self, channel, sourcetask):
+ sourcetask = loads_internal(sourcetask)
+ self._execqueue.put((channel, sourcetask))
+
+ def _terminate_execution(self):
+ # called from receiverthread
+ self._trace("putting None to execqueue")
+ self._execqueue.put(None)
+ if interrupt_main:
+ self._trace("calling interrupt_main()")
+ interrupt_main()
+ self._execfinished.wait(10.0)
+ if not self._execfinished.isSet():
+ self._trace("execution did not finish in 10 secs, calling os._exit()")
+ os._exit(1)
+
+ def serve(self, joining=True):
+ try:
+ try:
+ self._execqueue = queue.Queue()
+ self._execfinished = threading.Event()
+ self._initreceive()
+ while 1:
+ item = self._execqueue.get()
+ if item is None:
+ break
+ try:
+ self.executetask(item)
+ except self._StopExecLoop:
+ break
+ finally:
+ self._execfinished.set()
+ self._trace("io.close_write()")
+ self._io.close_write()
+ self._trace("slavegateway.serve finished")
+ if joining:
+ self.join()
+ except KeyboardInterrupt:
+ # in the slave we can't really do anything sensible
+ self._trace("swallowing keyboardinterrupt in main-thread")
+
+ def executetask(self, item):
+ try:
+ channel, (source, call_name, kwargs) = item
+ if not ISPY3 and kwargs:
+ # some python2 versions do not accept unicode keyword params
+ # note: Unserializer generally turns py2-str to py3-str objects
+ newkwargs = {}
+ for name, value in kwargs.items():
+ if isinstance(name, unicode):
+ name = name.encode('ascii')
+ newkwargs[name] = value
+ kwargs = newkwargs
+ loc = {'channel' : channel, '__name__': '__channelexec__'}
+ self._trace("execution starts[%s]: %s" %
+ (channel.id, repr(source)[:50]))
+ channel._executing = True
+ try:
+ co = compile(source+'\n', '', 'exec')
+ do_exec(co, loc)
+ if call_name:
+ self._trace('calling %s(**%60r)' % (call_name, kwargs))
+ function = loc[call_name]
+ function(channel, **kwargs)
+ finally:
+ channel._executing = False
+ self._trace("execution finished")
+ except self._StopExecLoop:
+ channel.close()
+ raise
+ except KeyboardInterrupt:
+ channel.close(INTERRUPT_TEXT)
+ raise
+ except:
+ excinfo = self.exc_info()
+ self._trace("got exception: %s" % (excinfo[1],))
+ errortext = self._geterrortext(excinfo)
+ channel.close(errortext)
+ else:
+ channel.close()
+
+#
+# Cross-Python pickling code, tested from test_serializer.py
+#
+
+class DataFormatError(Exception):
+ pass
+
+class DumpError(DataFormatError):
+ """Error while serializing an object."""
+
+class LoadError(DataFormatError):
+ """Error while unserializing an object."""
+
+if ISPY3:
+ def bchr(n):
+ return bytes([n])
+else:
+ bchr = chr
+
+DUMPFORMAT_VERSION = bchr(1)
+
+FOUR_BYTE_INT_MAX = 2147483647
+
+FLOAT_FORMAT = "!d"
+FLOAT_FORMAT_SIZE = struct.calcsize(FLOAT_FORMAT)
+
+class _Stop(Exception):
+ pass
+
+class Unserializer(object):
+ num2func = {} # is filled after this class definition
+ py2str_as_py3str = True # True
+ py3str_as_py2str = False # false means py2 will get unicode
+
+ def __init__(self, stream, channel_or_gateway=None, strconfig=None):
+ gateway = getattr(channel_or_gateway, 'gateway', channel_or_gateway)
+ strconfig = getattr(channel_or_gateway, '_strconfig', strconfig)
+ if strconfig:
+ self.py2str_as_py3str, self.py3str_as_py2str = strconfig
+ self.stream = stream
+ self.channelfactory = getattr(gateway, '_channelfactory', gateway)
+
+ def load(self, versioned=False):
+ if versioned:
+ ver = self.stream.read(1)
+ if ver != DUMPFORMAT_VERSION:
+ raise LoadError("wrong dumpformat version")
+ self.stack = []
+ try:
+ while True:
+ opcode = self.stream.read(1)
+ if not opcode:
+ raise EOFError
+ try:
+ loader = self.num2func[opcode]
+ except KeyError:
+ raise LoadError("unkown opcode %r - "
+ "wire protocol corruption?" % (opcode,))
+ loader(self)
+ except _Stop:
+ if len(self.stack) != 1:
+ raise LoadError("internal unserialization error")
+ return self.stack.pop(0)
+ else:
+ raise LoadError("didn't get STOP")
+
+ def load_none(self):
+ self.stack.append(None)
+
+ def load_true(self):
+ self.stack.append(True)
+
+ def load_false(self):
+ self.stack.append(False)
+
+ def load_int(self):
+ i = self._read_int4()
+ self.stack.append(i)
+
+ def load_longint(self):
+ s = self._read_byte_string()
+ self.stack.append(int(s))
+
+ if ISPY3:
+ load_long = load_int
+ load_longlong = load_longint
+ else:
+ def load_long(self):
+ i = self._read_int4()
+ self.stack.append(long(i))
+
+ def load_longlong(self):
+ l = self._read_byte_string()
+ self.stack.append(long(l))
+
+ def load_float(self):
+ binary = self.stream.read(FLOAT_FORMAT_SIZE)
+ self.stack.append(struct.unpack(FLOAT_FORMAT, binary)[0])
+
+ def _read_int4(self):
+ return struct.unpack("!i", self.stream.read(4))[0]
+
+ def _read_byte_string(self):
+ length = self._read_int4()
+ as_bytes = self.stream.read(length)
+ return as_bytes
+
+ def load_py3string(self):
+ as_bytes = self._read_byte_string()
+ if not ISPY3 and self.py3str_as_py2str:
+ # XXX Should we try to decode into latin-1?
+ self.stack.append(as_bytes)
+ else:
+ self.stack.append(as_bytes.decode("utf-8"))
+
+ def load_py2string(self):
+ as_bytes = self._read_byte_string()
+ if ISPY3 and self.py2str_as_py3str:
+ s = as_bytes.decode("latin-1")
+ else:
+ s = as_bytes
+ self.stack.append(s)
+
+ def load_bytes(self):
+ s = self._read_byte_string()
+ self.stack.append(s)
+
+ def load_unicode(self):
+ self.stack.append(self._read_byte_string().decode("utf-8"))
+
+ def load_newlist(self):
+ length = self._read_int4()
+ self.stack.append([None] * length)
+
+ def load_setitem(self):
+ if len(self.stack) < 3:
+ raise LoadError("not enough items for setitem")
+ value = self.stack.pop()
+ key = self.stack.pop()
+ self.stack[-1][key] = value
+
+ def load_newdict(self):
+ self.stack.append({})
+
+ def _load_collection(self, type_):
+ length = self._read_int4()
+ if length:
+ res = type_(self.stack[-length:])
+ del self.stack[-length:]
+ self.stack.append(res)
+ else:
+ self.stack.append(type_())
+
+ def load_buildtuple(self):
+ self._load_collection(tuple)
+
+ def load_set(self):
+ self._load_collection(set)
+
+ def load_frozenset(self):
+ self._load_collection(frozenset)
+
+ def load_stop(self):
+ raise _Stop
+
+ def load_channel(self):
+ id = self._read_int4()
+ newchannel = self.channelfactory.new(id)
+ self.stack.append(newchannel)
+
+# automatically build opcodes and byte-encoding
+
+class opcode:
+ """ container for name -> num mappings. """
+
+def _buildopcodes():
+ l = []
+ for name, func in Unserializer.__dict__.items():
+ if name.startswith("load_"):
+ opname = name[5:].upper()
+ l.append((opname, func))
+ l.sort()
+ for i,(opname, func) in enumerate(l):
+ assert i < 26, "xxx"
+ i = bchr(64+i)
+ Unserializer.num2func[i] = func
+ setattr(opcode, opname, i)
+
+_buildopcodes()
+
+def dumps(obj):
+ """ return a serialized bytestring of the given obj.
+
+ The obj and all contained objects must be of a builtin
+ python type (so nested dicts, sets, etc. are all ok but
+ not user-level instances).
+ """
+ return _Serializer().save(obj, versioned=True)
+
+def loads(bytestring, py2str_as_py3str=False, py3str_as_py2str=False):
+ """ return the object as deserialized from the given bytestring.
+
+ py2str_as_py3str: if true then string (str) objects previously
+ dumped on Python2 will be loaded as Python3
+ strings which really are text objects.
+ py3str_as_py2str: if true then string (str) objects previously
+ dumped on Python3 will be loaded as Python2
+ strings instead of unicode objects.
+
+ if the bytestring was dumped with an incompatible protocol
+ version or if the bytestring is corrupted, the
+ ``execnet.DataFormatError`` will be raised.
+ """
+ strconfig=(py2str_as_py3str, py3str_as_py2str)
+ io = BytesIO(bytestring)
+ return Unserializer(io, strconfig=strconfig).load(versioned=True)
+
+def loads_internal(bytestring, channelfactory=None, strconfig=None):
+ io = BytesIO(bytestring)
+ return Unserializer(io, channelfactory, strconfig).load()
+
+def dumps_internal(obj):
+ return _Serializer().save(obj)
+
+
+class _Serializer(object):
+ _dispatch = {}
+
+ def __init__(self):
+ self._streamlist = []
+
+ def _write(self, data):
+ self._streamlist.append(data)
+
+ def save(self, obj, versioned=False):
+ # calling here is not re-entrant but multiple instances
+ # may write to the same stream because of the common platform
+ # atomic-write guaruantee (concurrent writes each happen atomicly)
+ if versioned:
+ self._write(DUMPFORMAT_VERSION)
+ self._save(obj)
+ self._write(opcode.STOP)
+ s = type(self._streamlist[0])().join(self._streamlist)
+ return s
+
+ def _save(self, obj):
+ tp = type(obj)
+ try:
+ dispatch = self._dispatch[tp]
+ except KeyError:
+ methodname = 'save_' + tp.__name__
+ meth = getattr(self.__class__, methodname, None)
+ if meth is None:
+ raise DumpError("can't serialize %s" % (tp,))
+ dispatch = self._dispatch[tp] = meth
+ dispatch(self, obj)
+
+ def save_NoneType(self, non):
+ self._write(opcode.NONE)
+
+ def save_bool(self, boolean):
+ if boolean:
+ self._write(opcode.TRUE)
+ else:
+ self._write(opcode.FALSE)
+
+ def save_bytes(self, bytes_):
+ self._write(opcode.BYTES)
+ self._write_byte_sequence(bytes_)
+
+ if ISPY3:
+ def save_str(self, s):
+ self._write(opcode.PY3STRING)
+ self._write_unicode_string(s)
+ else:
+ def save_str(self, s):
+ self._write(opcode.PY2STRING)
+ self._write_byte_sequence(s)
+
+ def save_unicode(self, s):
+ self._write(opcode.UNICODE)
+ self._write_unicode_string(s)
+
+ def _write_unicode_string(self, s):
+ try:
+ as_bytes = s.encode("utf-8")
+ except UnicodeEncodeError:
+ raise DumpError("strings must be utf-8 encodable")
+ self._write_byte_sequence(as_bytes)
+
+ def _write_byte_sequence(self, bytes_):
+ self._write_int4(len(bytes_), "string is too long")
+ self._write(bytes_)
+
+ def _save_integral(self, i, short_op, long_op):
+ if i <= FOUR_BYTE_INT_MAX:
+ self._write(short_op)
+ self._write_int4(i)
+ else:
+ self._write(long_op)
+ self._write_byte_sequence(str(i).rstrip("L").encode("ascii"))
+
+ def save_int(self, i):
+ self._save_integral(i, opcode.INT, opcode.LONGINT)
+
+ def save_long(self, l):
+ self._save_integral(l, opcode.LONG, opcode.LONGLONG)
+
+ def save_float(self, flt):
+ self._write(opcode.FLOAT)
+ self._write(struct.pack(FLOAT_FORMAT, flt))
+
+ def _write_int4(self, i, error="int must be less than %i" %
+ (FOUR_BYTE_INT_MAX,)):
+ if i > FOUR_BYTE_INT_MAX:
+ raise DumpError(error)
+ self._write(struct.pack("!i", i))
+
+ def save_list(self, L):
+ self._write(opcode.NEWLIST)
+ self._write_int4(len(L), "list is too long")
+ for i, item in enumerate(L):
+ self._write_setitem(i, item)
+
+ def _write_setitem(self, key, value):
+ self._save(key)
+ self._save(value)
+ self._write(opcode.SETITEM)
+
+ def save_dict(self, d):
+ self._write(opcode.NEWDICT)
+ for key, value in d.items():
+ self._write_setitem(key, value)
+
+ def save_tuple(self, tup):
+ for item in tup:
+ self._save(item)
+ self._write(opcode.BUILDTUPLE)
+ self._write_int4(len(tup), "tuple is too long")
+
+ def _write_set(self, s, op):
+ for item in s:
+ self._save(item)
+ self._write(op)
+ self._write_int4(len(s), "set is too long")
+
+ def save_set(self, s):
+ self._write_set(s, opcode.SET)
+
+ def save_frozenset(self, s):
+ self._write_set(s, opcode.FROZENSET)
+
+ def save_Channel(self, channel):
+ self._write(opcode.CHANNEL)
+ self._write_int4(channel.id)
+
+def init_popen_io():
+ if not hasattr(os, 'dup'): # jython
+ io = Popen2IO(sys.stdout, sys.stdin)
+ import tempfile
+ sys.stdin = tempfile.TemporaryFile('r')
+ sys.stdout = tempfile.TemporaryFile('w')
+ else:
+ try:
+ devnull = os.devnull
+ except AttributeError:
+ if os.name == 'nt':
+ devnull = 'NUL'
+ else:
+ devnull = '/dev/null'
+ # stdin
+ stdin = os.fdopen(os.dup(0), 'r', 1)
+ fd = os.open(devnull, os.O_RDONLY)
+ os.dup2(fd, 0)
+ os.close(fd)
+
+ # stdout
+ stdout = os.fdopen(os.dup(1), 'w', 1)
+ fd = os.open(devnull, os.O_WRONLY)
+ os.dup2(fd, 1)
+
+ # stderr for win32
+ if os.name == 'nt':
+ sys.stderr = os.fdopen(os.dup(2), 'w', 1)
+ os.dup2(fd, 2)
+ os.close(fd)
+ io = Popen2IO(stdout, stdin)
+ sys.stdin = os.fdopen(0, 'r', 1)
+ sys.stdout = os.fdopen(1, 'w', 1)
+ return io
+
+def serve(io, id):
+ trace("creating slavegateway on %r" %(io,))
+ SlaveGateway(io=io, id=id, _startcount=2).serve()
View
83 execnet/gateway_bootstrap.py
@@ -0,0 +1,83 @@
+"""
+code to initialize the remote side of a gateway once the io is created
+"""
+import os
+import inspect
+import execnet
+from execnet import gateway_base
+from execnet.gateway import Gateway
+importdir = os.path.dirname(os.path.dirname(execnet.__file__))
+
+
+class HostNotFound(Exception):
+ pass
+
+
+def bootstrap_popen(io, spec):
+ sendexec(io,
+ "import sys",
+ "sys.path.insert(0, %r)" % importdir,
+ "from execnet.gateway_base import serve, init_popen_io",
+ "sys.stdout.write('1')",
+ "sys.stdout.flush()",
+ "serve(init_popen_io(), id='%s-slave')" % spec.id,
+ )
+ s = io.read(1)
+ assert s == "1".encode('ascii')
+
+
+def bootstrap_ssh(io, spec):
+ try:
+ sendexec(io,
+ inspect.getsource(gateway_base),
+ 'io = init_popen_io()',
+ "io.write('1'.encode('ascii'))",
+ "serve(io, id='%s-slave')" % spec.id,
+ )
+ s = io.read(1)
+ assert s == "1".encode('ascii')
+ except EOFError:
+ ret = io.wait()
+ if ret == 255:
+ raise HostNotFound(io.remoteaddress)
+
+
+def bootstrap_socket(io, id):
+ #XXX: switch to spec
+ from execnet.gateway_socket import SocketIO
+
+ sendexec(io,
+ inspect.getsource(gateway_base),
+ 'import socket',
+ inspect.getsource(SocketIO),
+ "io = SocketIO(clientsock)",
+ "io.write('1'.encode('ascii'))",
+ "serve(io, id='%s-slave')" % id,
+ )
+ s = io.read(1)
+ assert s == "1".encode('ascii')
+
+
+def sendexec(io, *sources):
+ source = "\n".join(sources)
+ io.write((repr(source)+ "\n").encode('ascii'))
+
+
+def bootstrap(io, spec):
+ if spec.popen:
+ bootstrap_popen(io, spec)
+ elif spec.ssh:
+ bootstrap_ssh(io, spec)
+ elif spec.socket:
+ bootstrap_socket(io, spec)
+ else:
+ raise ValueError('unknown gateway type, cant bootstrap')
+ gw = Gateway(io, spec.id)
+ if hasattr(io, 'popen'):
+ # fix for jython 2.5.1
+ if io.popen.pid is None:
+ io.popen.pid = gw.remote_exec(
+ "import os; channel.send(os.getpid())").receive()
+ return gw
+
+
View
174 execnet/gateway_io.py
@@ -0,0 +1,174 @@
+"""
+execnet io initialization code
+
+creates io instances used for gateway io
+"""
+import os
+import sys
+from subprocess import Popen, PIPE
+
+try:
+ from execnet.gateway_base import Popen2IO, Message
+except ImportError:
+ from __main__ import Popen2IO, Message
+
+class Popen2IOMaster(Popen2IO):
+ def __init__(self, args):
+ self.popen = p = Popen(args, stdin=PIPE, stdout=PIPE)
+ Popen2IO.__init__(self, p.stdin, p.stdout)
+
+ def wait(self):
+ try:
+ return self.popen.wait()
+ except OSError:
+ pass # subprocess probably dead already
+
+ def kill(self):
+ killpopen(self.popen)
+
+def killpopen(popen):
+ try:
+ if hasattr(popen, 'kill'):
+ popen.kill()
+ else:
+ killpid(popen.pid)
+ except EnvironmentError:
+ sys.stderr.write("ERROR killing: %s\n" %(sys.exc_info()[1]))
+ sys.stderr.flush()
+
+def killpid(pid):
+ if hasattr(os, 'kill'):
+ os.kill(pid, 15)
+ elif sys.platform == "win32" or getattr(os, '_name', None) == 'nt':
+ try:
+ import ctypes
+ except ImportError:
+ import subprocess
+ # T: treekill, F: Force
+ cmd = ("taskkill /T /F /PID %d" %(pid)).split()
+ ret = subprocess.call(cmd)
+ if ret != 0:
+ raise EnvironmentError("taskkill returned %r" %(ret,))
+ else:
+ PROCESS_TERMINATE = 1
+ handle = ctypes.windll.kernel32.OpenProcess(
+ PROCESS_TERMINATE, False, pid)
+ ctypes.windll.kernel32.TerminateProcess(handle, -1)
+ ctypes.windll.kernel32.CloseHandle(handle)
+ else:
+ raise EnvironmentError("no method to kill %s" %(pid,))
+
+
+
+popen_bootstrapline = "import sys;exec(eval(sys.stdin.readline()))"
+
+
+def popen_args(spec):
+ python = spec.python or sys.executable
+ args = [str(python), '-u']
+ if spec is not None and spec.dont_write_bytecode:
+ args.append("-B")
+ # Slight gymnastics in ordering these arguments because CPython (as of
+ # 2.7.1) ignores -B if you provide `python -c "something" -B`
+ args.extend(['-c', popen_bootstrapline])
+ return args
+
+def ssh_args(spec):
+ remotepython = spec.python or 'python'
+ args = ['ssh', '-C' ]
+ if spec.ssh_config is not None:
+ args.extend(['-F', str(spec.ssh_config)])
+ remotecmd = '%s -c "%s"' %(remotepython, popen_bootstrapline)
+ args.extend([spec.ssh, remotecmd])
+ return args
+
+
+
+def create_io(spec):
+ if spec.popen:
+ args = popen_args(spec)
+ return Popen2IOMaster(args)
+ if spec.ssh:
+ args = ssh_args(spec)
+ io = Popen2IOMaster(args)
+ io.remoteaddress = spec.ssh
+ return io
+
+RIO_KILL = 1
+RIO_WAIT = 2
+RIO_REMOTEADDRESS = 3
+RIO_CLOSE_WRITE = 4
+
+class RemoteIO(object):
+ def __init__(self, master_channel):
+ self.iochan = master_channel.gateway.newchannel()
+ self.controlchan = master_channel.gateway.newchannel()
+ master_channel.send((self.iochan, self.controlchan))
+ self.io = self.iochan.makefile('r')
+
+
+ def read(self, nbytes):
+ return self.io.read(nbytes)
+
+ def write(self, data):
+ return self.iochan.send(data)
+
+ def _controll(self, event):
+ self.controlchan.send(event)
+ return self.controlchan.receive()
+
+ def close_write(self):
+ self._controll(RIO_CLOSE_WRITE)
+
+ def kill(self):
+ self._controll(RIO_KILL)
+
+ def wait(self):
+ return self._controll(RIO_WAIT)
+
+ def __repr__(self):
+ return '<RemoteIO via %s>' % (self.iochan.gateway.id, )
+
+
+def serve_remote_io(channel):
+ class PseudoSpec(object):
+ def __getattr__(self, name):
+ return None
+ spec = PseudoSpec()
+ spec.__dict__.update(channel.receive())
+ io = create_io(spec)
+ io_chan, control_chan = channel.receive()
+ io_target = io_chan.makefile()
+
+ def iothread():
+ initial = io.read(1)
+ assert initial == '1'.encode('ascii')
+ channel.gateway._trace('initializing transfer io for', spec.id)
+ io_target.write(initial)
+ while True:
+ message = Message.from_io(io)
+ message.to_io(io_target)
+ import threading
+ thread = threading.Thread(name='io-forward-'+spec.id,
+ target=iothread)
+ thread.setDaemon(True)
+ thread.start()
+
+ def iocallback(data):
+ io.write(data)
+ io_chan.setcallback(iocallback)
+
+
+ def controll(data):
+ if data==RIO_WAIT:
+ control_chan.send(io.wait())
+ elif data==RIO_KILL:
+ control_chan.send(io.kill())
+ elif data==RIO_REMOTEADDRESS:
+ control_chan.send(io.remoteaddress)
+ elif data==RIO_CLOSE_WRITE:
+ control_chan.send(io.close_write())
+ control_chan.setcallback(controll)
+
+if __name__ == "__channelexec__":
+ serve_remote_io(channel)
View
91 execnet/gateway_socket.py
@@ -0,0 +1,91 @@
+import socket
+from execnet.gateway import Gateway
+from execnet.gateway_bootstrap import HostNotFound
+import os, sys, inspect
+
+
+try: bytes
+except NameError: bytes = str
+
+class SocketIO:
+
+ error = (socket.error, EOFError)
+ def __init__(self, sock):
+ self.sock = sock
+ try:
+ sock.setsockopt(socket.SOL_IP, socket.IP_TOS, 0x10)# IPTOS_LOWDELAY
+ sock.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
+ except (AttributeError, socket.error):
+ sys.stderr.write("WARNING: cannot set socketoption")
+
+ def read(self, numbytes):
+ "Read exactly 'bytes' bytes from the socket."
+ buf = bytes()
+ while len(buf) < numbytes:
+ t = self.sock.recv(numbytes - len(buf))
+ if not t:
+ raise EOFError
+ buf += t
+ return buf
+
+ def write(self, data):
+ self.sock.sendall(data)
+
+ def close_read(self):
+ try:
+ self.sock.shutdown(0)
+ except socket.error:
+ pass
+ def close_write(self):
+ try:
+ self.sock.shutdown(1)
+ except socket.error:
+ pass
+
+ def wait(self):
+ pass
+
+ def kill(self):
+ pass
+
+
+def start_via(gateway, hostport=None):
+ """ return a host, port tuple,
+ after instanciating a socketserver on the given gateway
+ """
+ if hostport is None:
+ host, port = ('localhost', 0)
+ else:
+ host, port = hostport
+
+ from execnet.script import socketserver
+
+ # execute the above socketserverbootstrap on the other side
+ channel = gateway.remote_exec(socketserver)
+ channel.send((host, port))
+ (realhost, realport) = channel.receive()
+ #self._trace("new_remote received"
+ # "port=%r, hostname = %r" %(realport, hostname))
+ if not realhost or realhost=="0.0.0.0":
+ realhost = "localhost"
+ return realhost, realport
+
+
+def create_io(spec, group):
+ assert not spec.python, (
+ "socket: specifying python executables not yet supported")
+ gateway_id = spec.installvia
+ if gateway_id:
+ host, port = start_via(group[gateway_id])
+ else:
+ host, port = spec.socket.split(":")
+ port = int(port)
+
+ sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
+ io = SocketIO(sock)
+ io.remoteaddress = '%s:%d' % (host, port)
+ try:
+ sock.connect((host, port))
+ except socket.gaierror:
+ raise HostNotFound(str(sys.exc_info()[1]))
+ return io
View
259 execnet/multi.py
@@ -0,0 +1,259 @@
+"""
+Managing Gateway Groups and interactions with multiple channels.
+
+(c) 2008-2009, Holger Krekel and others
+"""
+
+import os, sys, atexit
+import time
+import execnet
+from execnet.threadpool import WorkerPool
+
+from execnet import XSpec
+from execnet import gateway, gateway_io, gateway_bootstrap
+from execnet.gateway_base import queue, reraise, trace, TimeoutError
+
+NO_ENDMARKER_WANTED = object()
+
+class Group:
+ """ Gateway Groups. """
+ defaultspec = "popen"
+ def __init__(self, xspecs=()):
+ """ initialize group and make gateways as specified. """
+ # Gateways may evolve to become GC-collectable
+ self._gateways = []
+ self._autoidcounter = 0
+ self._gateways_to_join = []
+ for xspec in xspecs:
+ self.makegateway(xspec)
+ atexit.register(self._cleanup_atexit)
+
+ def __repr__(self):
+ idgateways = [gw.id for gw in self]
+ return "<Group %r>" %(idgateways)
+
+ def __getitem__(self, key):
+ if isinstance(key, int):
+ return self._gateways[key]
+ for gw in self._gateways:
+ if gw == key or gw.id == key:
+ return gw
+ raise KeyError(key)
+
+ def __contains__(self, key):
+ try:
+ self[key]
+ return True
+ except KeyError:
+ return False
+
+ def __len__(self):
+ return len(self._gateways)
+
+ def __iter__(self):
+ return iter(list(self._gateways))
+
+ def makegateway(self, spec=None):
+ """create and configure a gateway to a Python interpreter.
+ The ``spec`` string encodes the target gateway type
+ and configuration information. The general format is::
+
+ key1=value1//key2=value2//...
+
+ If you leave out the ``=value`` part a True value is assumed.
+ Valid types: ``popen``, ``ssh=hostname``, ``socket=host:port``.
+ Valid configuration::
+
+ id=<string> specifies the gateway id
+ python=<path> specifies which python interpreter to execute
+ chdir=<path> specifies to which directory to change
+ nice=<path> specifies process priority of new process
+ env:NAME=value specifies a remote environment variable setting.
+
+ If no spec is given, self.defaultspec is used.
+ """
+ if not spec:
+ spec = self.defaultspec
+ if not isinstance(spec, XSpec):
+ spec = XSpec(spec)
+ self.allocate_id(spec)
+ if spec.via:
+ assert not spec.socket
+ master = self[spec.via]
+ channel = master.remote_exec(gateway_io)
+ channel.send(vars(spec))
+ io = gateway_io.RemoteIO(channel)
+ gw = gateway_bootstrap.bootstrap(io, spec)
+ elif spec.popen or spec.ssh:
+ io = gateway_io.create_io(spec)
+ gw = gateway_bootstrap.bootstrap(io, spec)
+ elif spec.socket:
+ from execnet import gateway_socket
+ io = gateway_socket.create_io(spec, self)
+ gw = gateway_bootstrap.bootstrap(io, spec)
+ else:
+ raise ValueError("no gateway type found for %r" % (spec._spec,))
+ gw.spec = spec
+ self._register(gw)
+ if spec.chdir or spec.nice or spec.env:
+ channel = gw.remote_exec("""
+ import os
+ path, nice, env = channel.receive()
+ if path:
+ if not os.path.exists(path):
+ os.mkdir(path)
+ os.chdir(path)
+ if nice and hasattr(os, 'nice'):
+ os.nice(nice)
+ if env:
+ for name, value in env.items():
+ os.environ[name] = value
+ """)
+ nice = spec.nice and int(spec.nice) or 0
+ channel.send((spec.chdir, nice, spec.env))
+ channel.waitclose()
+ return gw
+
+ def allocate_id(self, spec):
+ """ allocate id for the given xspec object. """
+ if spec.id is None:
+ id = "gw" + str(self._autoidcounter)
+ self._autoidcounter += 1
+ if id in self:
+ raise ValueError("already have gateway with id %r" %(id,))
+ spec.id = id
+
+ def _register(self, gateway):
+ assert not hasattr(gateway, '_group')
+ assert gateway.id
+ assert id not in self
+ self._gateways.append(gateway)
+ gateway._group = self
+
+ def _unregister(self, gateway):
+ self._gateways.remove(gateway)
+ self._gateways_to_join.append(gateway)
+
+ def _cleanup_atexit(self):
+ trace("=== atexit cleanup %r ===" %(self,))
+ self.terminate(timeout=1.0)
+
+ def terminate(self, timeout=None):
+ """ trigger exit of member gateways and wait for termination
+ of member gateways and associated subprocesses. After waiting
+ timeout seconds try to to kill local sub processes of popen-
+ and ssh-gateways. Timeout defaults to None meaning
+ open-ended waiting and no kill attempts.
+ """
+
+ while self:
+ from execnet.threadpool import WorkerPool
+ vias = {}
+ for gw in self:
+ if gw.spec.via:
+ vias[gw.spec.via] = True
+ for gw in self:
+ if gw.id not in vias:
+ gw.exit()
+
+ def join_wait(gw):
+ gw.join()
+ gw._io.wait()
+ def kill(gw):
+ trace("Gateways did not come down after timeout: %r" % gw)
+ gw._io.kill()
+
+ safe_terminate(timeout, [
+ (lambda: join_wait(gw), lambda: kill(gw))
+ for gw in self._gateways_to_join])
+ self._gateways_to_join[:] = []
+
+ def remote_exec(self, source, **kwargs):
+ """ remote_exec source on all member gateways and return
+ MultiChannel connecting to all sub processes.
+ """
+ channels = []
+ for gw in self:
+ channels.append(gw.remote_exec(source, **kwargs))
+ return MultiChannel(channels)
+
+class MultiChannel:
+ def __init__(self, channels):
+ self._channels = channels
+
+ def __len__(self):
+ return len(self._channels)
+
+ def __iter__(self):
+ return iter(self._channels)
+
+ def __getitem__(self, key):
+ return self._channels[key]
+
+ def __contains__(self, chan):
+ return chan in self._channels
+
+ def send_each(self, item):
+ for ch in self._channels:
+ ch.send(item)
+
+ def receive_each(self, withchannel=False):
+ assert not hasattr(self, '_queue')
+ l = []
+ for ch in self._channels:
+ obj = ch.receive()
+ if withchannel:
+ l.append((ch, obj))
+ else:
+ l.append(obj)
+ return l
+
+ def make_receive_queue(self, endmarker=NO_ENDMARKER_WANTED):
+ try:
+ return self._queue
+ except AttributeError:
+ self._queue = queue.Queue()
+ for ch in self._channels:
+ def putreceived(obj, channel=ch):
+ self._queue.put((channel, obj))
+ if endmarker is NO_ENDMARKER_WANTED:
+ ch.setcallback(putreceived)
+ else:
+ ch.setcallback(putreceived, endmarker=endmarker)
+ return self._queue
+
+
+ def waitclose(self):
+ first = None
+ for ch in self._channels:
+ try:
+ ch.waitclose()
+ except ch.RemoteError:
+ if first is None:
+ first = sys.exc_info()
+ if first:
+ reraise(*first)
+
+
+
+def safe_terminate(timeout, list_of_paired_functions):
+ workerpool = WorkerPool(len(list_of_paired_functions)*2)
+
+ def termkill(termfunc, killfunc):
+ termreply = workerpool.dispatch(termfunc)
+ try:
+ termreply.get(timeout=timeout)
+ except IOError:
+ killfunc()
+
+ replylist = []
+ for termfunc, killfunc in list_of_paired_functions:
+ reply = workerpool.dispatch(termkill, termfunc, killfunc)
+ replylist.append(reply)
+ for reply in replylist:
+ reply.get()
+
+
+default_group = Group()
+makegateway = default_group.makegateway
+
View
207 execnet/rsync.py
@@ -0,0 +1,207 @@
+"""
+1:N rsync implemenation on top of execnet.
+
+(c) 2006-2009, Armin Rigo, Holger Krekel, Maciej Fijalkowski
+"""
+import os, stat
+
+try:
+ from hashlib import md5
+except ImportError:
+ from md5 import md5
+
+try:
+ from queue import Queue
+except ImportError:
+ from Queue import Queue
+
+import execnet.rsync_remote
+
+class RSync(object):
+ """ This class allows to send a directory structure (recursively)
+ to one or multiple remote filesystems.
+
+ There is limited support for symlinks, which means that symlinks
+ pointing to the sourcetree will be send "as is" while external
+ symlinks will be just copied (regardless of existance of such
+ a path on remote side).
+ """
+ def __init__(self, sourcedir, callback=None, verbose=True):
+ self._sourcedir = str(sourcedir)
+ self._verbose = verbose
+ assert callback is None or hasattr(callback, '__call__')
+ self._callback = callback
+ self._channels = {}
+ self._receivequeue = Queue()
+ self._links = []
+
+ def filter(self, path):
+ return True
+
+ def _end_of_channel(self, channel):
+ if channel in self._channels:
+ # too early! we must have got an error
+ channel.waitclose()
+ # or else we raise one
+ raise IOError('connection unexpectedly closed: %s ' % (
+ channel.gateway,))
+