211 lines
7.6 KiB
Python
211 lines
7.6 KiB
Python
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import os, inspect, socket
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import sys
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from py.magic import autopath ; mypath = autopath()
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from py.__.misc.warn import APIWARN
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try:
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from subprocess import Popen, PIPE
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except ImportError:
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from py.__.compat.subprocess import Popen, PIPE
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import py
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if sys.platform == "win32":
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win32 = True
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import msvcrt
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else:
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win32 = False
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# the list of modules that must be send to the other side
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# for bootstrapping gateways
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# XXX we'd like to have a leaner and meaner bootstrap mechanism
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startup_modules = [
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'py.__.thread.io',
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'py.__.execnet.inputoutput',
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'py.__.execnet.gateway',
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'py.__.execnet.message',
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'py.__.execnet.channel',
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]
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def getsource(dottedname):
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mod = __import__(dottedname, None, None, ['__doc__'])
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return inspect.getsource(mod)
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from py.__.execnet import inputoutput, gateway
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class InstallableGateway(gateway.Gateway):
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""" initialize gateways on both sides of a inputoutput object. """
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def __init__(self, io):
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self._remote_bootstrap_gateway(io)
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super(InstallableGateway, self).__init__(io=io, _startcount=1)
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# XXX we dissallow execution form the other side
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self._initreceive(requestqueue=False)
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def _remote_bootstrap_gateway(self, io, extra=''):
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""" return Gateway with a asynchronously remotely
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initialized counterpart Gateway (which may or may not succeed).
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Note that the other sides gateways starts enumerating
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its channels with even numbers while the sender
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gateway starts with odd numbers. This allows to
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uniquely identify channels across both sides.
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"""
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bootstrap = [extra]
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bootstrap += [getsource(x) for x in startup_modules]
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bootstrap += [io.server_stmt,
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"Gateway(io=io, _startcount=2)._servemain()",
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]
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source = "\n".join(bootstrap)
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self._trace("sending gateway bootstrap code")
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io.write('%r\n' % source)
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class PopenCmdGateway(InstallableGateway):
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def __init__(self, cmd):
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p = Popen(cmd, shell=True, stdin=PIPE, stdout=PIPE, close_fds=True)
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infile, outfile = p.stdin, p.stdout
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self._cmd = cmd
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io = inputoutput.Popen2IO(infile, outfile)
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super(PopenCmdGateway, self).__init__(io=io)
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class PopenGateway(PopenCmdGateway):
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""" This Gateway provides interaction with a newly started
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python subprocess.
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"""
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def __init__(self, python=sys.executable):
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""" instantiate a gateway to a subprocess
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started with the given 'python' executable.
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"""
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cmd = '%s -u -c "exec input()"' % python
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super(PopenGateway, self).__init__(cmd)
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def _remote_bootstrap_gateway(self, io, extra=''):
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# have the subprocess use the same PYTHONPATH and py lib
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x = py.path.local(py.__file__).dirpath().dirpath()
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ppath = os.environ.get('PYTHONPATH', '')
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plist = [str(x)] + ppath.split(':')
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s = "\n".join([extra,
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"import sys ; sys.path[:0] = %r" % (plist,),
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"import os ; os.environ['PYTHONPATH'] = %r" % ppath,
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str(py.code.Source(stdouterrin_setnull)),
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"stdouterrin_setnull()",
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""
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])
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super(PopenGateway, self)._remote_bootstrap_gateway(io, s)
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class SocketGateway(InstallableGateway):
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""" This Gateway provides interaction with a remote process
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by connecting to a specified socket. On the remote
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side you need to manually start a small script
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(py/execnet/script/socketserver.py) that accepts
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SocketGateway connections.
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"""
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def __init__(self, host, port):
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""" instantiate a gateway to a process accessed
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via a host/port specified socket.
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"""
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self.host = host = str(host)
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self.port = port = int(port)
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sock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
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sock.connect((host, port))
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io = inputoutput.SocketIO(sock)
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super(SocketGateway, self).__init__(io=io)
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self.remoteaddress = '%s:%d' % (self.host, self.port)
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def new_remote(cls, gateway, hostport=None):
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""" return a new (connected) socket gateway, instatiated
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indirectly through the given 'gateway'.
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"""
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if hostport is None:
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host, port = ('', 0) # XXX works on all platforms?
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else:
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host, port = hostport
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socketserverbootstrap = py.code.Source(
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mypath.dirpath('script', 'socketserver.py').read('rU'), """
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import socket
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sock = bind_and_listen((%r, %r))
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port = sock.getsockname()
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channel.send(port)
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startserver(sock)
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""" % (host, port)
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)
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# execute the above socketserverbootstrap on the other side
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channel = gateway.remote_exec(socketserverbootstrap)
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(realhost, realport) = channel.receive()
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#gateway._trace("new_remote received"
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# "port=%r, hostname = %r" %(realport, hostname))
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return py.execnet.SocketGateway(host, realport)
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new_remote = classmethod(new_remote)
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class SshGateway(PopenCmdGateway):
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""" This Gateway provides interaction with a remote Python process,
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established via the 'ssh' command line binary.
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The remote side needs to have a Python interpreter executable.
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"""
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def __init__(self, sshaddress, remotepython='python',
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identity=None, ssh_config=None):
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""" instantiate a remote ssh process with the
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given 'sshaddress' and remotepython version.
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you may specify an ssh_config file.
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DEPRECATED: you may specify an 'identity' filepath.
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"""
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self.remoteaddress = sshaddress
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remotecmd = '%s -u -c "exec input()"' % (remotepython,)
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cmdline = [sshaddress, remotecmd]
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# XXX Unix style quoting
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for i in range(len(cmdline)):
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cmdline[i] = "'" + cmdline[i].replace("'", "'\\''") + "'"
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cmd = 'ssh -C'
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if identity is not None:
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APIWARN("1.0", "pass in 'ssh_config' file instead of identity")
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cmd += ' -i %s' % (identity,)
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if ssh_config is not None:
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cmd += ' -F %s' % (ssh_config)
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cmdline.insert(0, cmd)
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cmd = ' '.join(cmdline)
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super(SshGateway, self).__init__(cmd)
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def _remote_bootstrap_gateway(self, io, s=""):
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extra = "\n".join([
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str(py.code.Source(stdouterrin_setnull)),
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"stdouterrin_setnull()",
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s,
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])
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super(SshGateway, self)._remote_bootstrap_gateway(io, extra)
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def stdouterrin_setnull():
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""" redirect file descriptors 0 and 1 (and possibly 2) to /dev/null.
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note that this function may run remotely without py lib support.
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"""
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# complete confusion (this is independent from the sys.stdout
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# and sys.stderr redirection that gateway.remote_exec() can do)
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# note that we redirect fd 2 on win too, since for some reason that
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# blocks there, while it works (sending to stderr if possible else
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# ignoring) on *nix
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import sys, os
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try:
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devnull = os.devnull
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except AttributeError:
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if os.name == 'nt':
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devnull = 'NUL'
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else:
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devnull = '/dev/null'
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# stdin
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sys.stdin = os.fdopen(os.dup(0), 'rb', 0)
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fd = os.open(devnull, os.O_RDONLY)
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os.dup2(fd, 0)
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os.close(fd)
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# stdout
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sys.stdout = os.fdopen(os.dup(1), 'wb', 0)
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fd = os.open(devnull, os.O_WRONLY)
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os.dup2(fd, 1)
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# stderr for win32
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if os.name == 'nt':
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sys.stderr = os.fdopen(os.dup(2), 'wb', 0)
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os.dup2(fd, 2)
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os.close(fd)
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