ref: f360729664eb91e8ee692bdabbf3b5b655cd8959
dir: /sys/lib/python/idlelib/run.py/
import sys
import os
import linecache
import time
import socket
import traceback
import thread
import threading
import Queue
import CallTips
import AutoComplete
import RemoteDebugger
import RemoteObjectBrowser
import StackViewer
import rpc
import __main__
LOCALHOST = '127.0.0.1'
try:
import warnings
except ImportError:
pass
else:
def idle_formatwarning_subproc(message, category, filename, lineno):
"""Format warnings the IDLE way"""
s = "\nWarning (from warnings module):\n"
s += ' File \"%s\", line %s\n' % (filename, lineno)
line = linecache.getline(filename, lineno).strip()
if line:
s += " %s\n" % line
s += "%s: %s\n" % (category.__name__, message)
return s
warnings.formatwarning = idle_formatwarning_subproc
# Thread shared globals: Establish a queue between a subthread (which handles
# the socket) and the main thread (which runs user code), plus global
# completion and exit flags:
exit_now = False
quitting = False
def main(del_exitfunc=False):
"""Start the Python execution server in a subprocess
In the Python subprocess, RPCServer is instantiated with handlerclass
MyHandler, which inherits register/unregister methods from RPCHandler via
the mix-in class SocketIO.
When the RPCServer 'server' is instantiated, the TCPServer initialization
creates an instance of run.MyHandler and calls its handle() method.
handle() instantiates a run.Executive object, passing it a reference to the
MyHandler object. That reference is saved as attribute rpchandler of the
Executive instance. The Executive methods have access to the reference and
can pass it on to entities that they command
(e.g. RemoteDebugger.Debugger.start_debugger()). The latter, in turn, can
call MyHandler(SocketIO) register/unregister methods via the reference to
register and unregister themselves.
"""
global exit_now
global quitting
global no_exitfunc
no_exitfunc = del_exitfunc
port = 8833
#time.sleep(15) # test subprocess not responding
if sys.argv[1:]:
port = int(sys.argv[1])
sys.argv[:] = [""]
sockthread = threading.Thread(target=manage_socket,
name='SockThread',
args=((LOCALHOST, port),))
sockthread.setDaemon(True)
sockthread.start()
while 1:
try:
if exit_now:
try:
exit()
except KeyboardInterrupt:
# exiting but got an extra KBI? Try again!
continue
try:
seq, request = rpc.request_queue.get(block=True, timeout=0.05)
except Queue.Empty:
continue
method, args, kwargs = request
ret = method(*args, **kwargs)
rpc.response_queue.put((seq, ret))
except KeyboardInterrupt:
if quitting:
exit_now = True
continue
except SystemExit:
raise
except:
type, value, tb = sys.exc_info()
try:
print_exception()
rpc.response_queue.put((seq, None))
except:
# Link didn't work, print same exception to __stderr__
traceback.print_exception(type, value, tb, file=sys.__stderr__)
exit()
else:
continue
def manage_socket(address):
for i in range(3):
time.sleep(i)
try:
server = MyRPCServer(address, MyHandler)
break
except socket.error, err:
print>>sys.__stderr__,"IDLE Subprocess: socket error: "\
+ err[1] + ", retrying...."
else:
print>>sys.__stderr__, "IDLE Subprocess: Connection to "\
"IDLE GUI failed, exiting."
show_socket_error(err, address)
global exit_now
exit_now = True
return
server.handle_request() # A single request only
def show_socket_error(err, address):
import Tkinter
import tkMessageBox
root = Tkinter.Tk()
root.withdraw()
if err[0] == 61: # connection refused
msg = "IDLE's subprocess can't connect to %s:%d. This may be due "\
"to your personal firewall configuration. It is safe to "\
"allow this internal connection because no data is visible on "\
"external ports." % address
tkMessageBox.showerror("IDLE Subprocess Error", msg, parent=root)
else:
tkMessageBox.showerror("IDLE Subprocess Error", "Socket Error: %s" % err[1])
root.destroy()
def print_exception():
import linecache
linecache.checkcache()
flush_stdout()
efile = sys.stderr
typ, val, tb = excinfo = sys.exc_info()
sys.last_type, sys.last_value, sys.last_traceback = excinfo
tbe = traceback.extract_tb(tb)
print>>efile, '\nTraceback (most recent call last):'
exclude = ("run.py", "rpc.py", "threading.py", "Queue.py",
"RemoteDebugger.py", "bdb.py")
cleanup_traceback(tbe, exclude)
traceback.print_list(tbe, file=efile)
lines = traceback.format_exception_only(typ, val)
for line in lines:
print>>efile, line,
def cleanup_traceback(tb, exclude):
"Remove excluded traces from beginning/end of tb; get cached lines"
orig_tb = tb[:]
while tb:
for rpcfile in exclude:
if tb[0][0].count(rpcfile):
break # found an exclude, break for: and delete tb[0]
else:
break # no excludes, have left RPC code, break while:
del tb[0]
while tb:
for rpcfile in exclude:
if tb[-1][0].count(rpcfile):
break
else:
break
del tb[-1]
if len(tb) == 0:
# exception was in IDLE internals, don't prune!
tb[:] = orig_tb[:]
print>>sys.stderr, "** IDLE Internal Exception: "
rpchandler = rpc.objecttable['exec'].rpchandler
for i in range(len(tb)):
fn, ln, nm, line = tb[i]
if nm == '?':
nm = "-toplevel-"
if not line and fn.startswith("<pyshell#"):
line = rpchandler.remotecall('linecache', 'getline',
(fn, ln), {})
tb[i] = fn, ln, nm, line
def flush_stdout():
try:
if sys.stdout.softspace:
sys.stdout.softspace = 0
sys.stdout.write("\n")
except (AttributeError, EOFError):
pass
def exit():
"""Exit subprocess, possibly after first deleting sys.exitfunc
If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any
sys.exitfunc will be removed before exiting. (VPython support)
"""
if no_exitfunc:
del sys.exitfunc
sys.exit(0)
class MyRPCServer(rpc.RPCServer):
def handle_error(self, request, client_address):
"""Override RPCServer method for IDLE
Interrupt the MainThread and exit server if link is dropped.
"""
global quitting
try:
raise
except SystemExit:
raise
except EOFError:
global exit_now
exit_now = True
thread.interrupt_main()
except:
erf = sys.__stderr__
print>>erf, '\n' + '-'*40
print>>erf, 'Unhandled server exception!'
print>>erf, 'Thread: %s' % threading.currentThread().getName()
print>>erf, 'Client Address: ', client_address
print>>erf, 'Request: ', repr(request)
traceback.print_exc(file=erf)
print>>erf, '\n*** Unrecoverable, server exiting!'
print>>erf, '-'*40
quitting = True
thread.interrupt_main()
class MyHandler(rpc.RPCHandler):
def handle(self):
"""Override base method"""
executive = Executive(self)
self.register("exec", executive)
sys.stdin = self.console = self.get_remote_proxy("stdin")
sys.stdout = self.get_remote_proxy("stdout")
sys.stderr = self.get_remote_proxy("stderr")
import IOBinding
sys.stdin.encoding = sys.stdout.encoding = \
sys.stderr.encoding = IOBinding.encoding
self.interp = self.get_remote_proxy("interp")
rpc.RPCHandler.getresponse(self, myseq=None, wait=0.05)
def exithook(self):
"override SocketIO method - wait for MainThread to shut us down"
time.sleep(10)
def EOFhook(self):
"Override SocketIO method - terminate wait on callback and exit thread"
global quitting
quitting = True
thread.interrupt_main()
def decode_interrupthook(self):
"interrupt awakened thread"
global quitting
quitting = True
thread.interrupt_main()
class Executive(object):
def __init__(self, rpchandler):
self.rpchandler = rpchandler
self.locals = __main__.__dict__
self.calltip = CallTips.CallTips()
self.autocomplete = AutoComplete.AutoComplete()
def runcode(self, code):
try:
self.usr_exc_info = None
exec code in self.locals
except:
self.usr_exc_info = sys.exc_info()
if quitting:
exit()
# even print a user code SystemExit exception, continue
print_exception()
jit = self.rpchandler.console.getvar("<<toggle-jit-stack-viewer>>")
if jit:
self.rpchandler.interp.open_remote_stack_viewer()
else:
flush_stdout()
def interrupt_the_server(self):
thread.interrupt_main()
def start_the_debugger(self, gui_adap_oid):
return RemoteDebugger.start_debugger(self.rpchandler, gui_adap_oid)
def stop_the_debugger(self, idb_adap_oid):
"Unregister the Idb Adapter. Link objects and Idb then subject to GC"
self.rpchandler.unregister(idb_adap_oid)
def get_the_calltip(self, name):
return self.calltip.fetch_tip(name)
def get_the_completion_list(self, what, mode):
return self.autocomplete.fetch_completions(what, mode)
def stackviewer(self, flist_oid=None):
if self.usr_exc_info:
typ, val, tb = self.usr_exc_info
else:
return None
flist = None
if flist_oid is not None:
flist = self.rpchandler.get_remote_proxy(flist_oid)
while tb and tb.tb_frame.f_globals["__name__"] in ["rpc", "run"]:
tb = tb.tb_next
sys.last_type = typ
sys.last_value = val
item = StackViewer.StackTreeItem(flist, tb)
return RemoteObjectBrowser.remote_object_tree_item(item)