JezK
Edit File: run.py
import sys import io import linecache import time import socket import traceback import _thread as thread import threading import queue from idlelib import CallTips from idlelib import AutoComplete from idlelib import RemoteDebugger from idlelib import RemoteObjectBrowser from idlelib import StackViewer from idlelib import rpc import __main__ LOCALHOST = '127.0.0.1' try: import warnings except ImportError: pass else: def idle_formatwarning_subproc(message, category, filename, lineno, line=None): """Format warnings the IDLE way""" s = "\nWarning (from warnings module):\n" s += ' File \"%s\", line %s\n' % (filename, lineno) if line is None: line = linecache.getline(filename, lineno) line = line.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, exit and interruptable (the main thread) flags: exit_now = False quitting = False interruptable = 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 #time.sleep(15) # test subprocess not responding try: assert(len(sys.argv) > 1) port = int(sys.argv[-1]) except: print("IDLE Subprocess: no IP port passed in sys.argv.", file=sys.__stderr__) return sys.argv[:] = [""] sockthread = threading.Thread(target=manage_socket, name='SockThread', args=((LOCALHOST, port),)) sockthread.daemon = 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 as err: print("IDLE Subprocess: socket error: " + err.args[1] + ", retrying....", file=sys.__stderr__) socket_error = err else: print("IDLE Subprocess: Connection to " "IDLE GUI failed, exiting.", file=sys.__stderr__) show_socket_error(socket_error, address) global exit_now exit_now = True return server.handle_request() # A single request only def show_socket_error(err, address): import tkinter import tkinter.messagebox as tkMessageBox root = tkinter.Tk() root.withdraw() if err.args[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.args[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('Traceback (most recent call last):', file=efile) 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(line, end='', file=efile) 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("** IDLE Internal Exception: ", file=sys.stderr) 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(): """XXX How to do this now?""" def exit(): """Exit subprocess, possibly after first clearing exit functions. If config-main.cfg/.def 'General' 'delete-exitfunc' is True, then any functions registered with atexit will be removed before exiting. (VPython support) """ if no_exitfunc: import atexit atexit._clear() 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('\n' + '-'*40, file=erf) print('Unhandled server exception!', file=erf) print('Thread: %s' % threading.current_thread().name, file=erf) print('Client Address: ', client_address, file=erf) print('Request: ', repr(request), file=erf) traceback.print_exc(file=erf) print('\n*** Unrecoverable, server exiting!', file=erf) print('-'*40, file=erf) quitting = True thread.interrupt_main() class _RPCFile(io.TextIOBase): """Wrapper class for the RPC proxy to typecheck arguments that may not support pickling. The base class is there only to support type tests; all implementations come from the remote object.""" def __init__(self, rpc): super.__setattr__(self, 'rpc', rpc) def __getattribute__(self, name): # When accessing the 'rpc' attribute, or 'write', use ours if name in ('rpc', 'write', 'writelines'): return io.TextIOBase.__getattribute__(self, name) # Else only look into the remote object only return getattr(self.rpc, name) def __setattr__(self, name, value): return setattr(self.rpc, name, value) @staticmethod def _ensure_string(func): def f(self, s): if not isinstance(s, str): raise TypeError('must be str, not ' + type(s).__name__) return func(self, s) return f class _RPCOutputFile(_RPCFile): @_RPCFile._ensure_string def write(self, s): if not isinstance(s, str): raise TypeError('must be str, not ' + type(s).__name__) return self.rpc.write(s) class _RPCInputFile(_RPCFile): @_RPCFile._ensure_string def write(self, s): raise io.UnsupportedOperation("not writable") writelines = write class MyHandler(rpc.RPCHandler): def handle(self): """Override base method""" executive = Executive(self) self.register("exec", executive) self.console = self.get_remote_proxy("stdin") sys.stdin = _RPCInputFile(self.console) sys.stdout = _RPCOutputFile(self.get_remote_proxy("stdout")) sys.stderr = _RPCOutputFile(self.get_remote_proxy("stderr")) # page help() text to shell. import pydoc # import must be done here to capture i/o binding pydoc.pager = pydoc.plainpager from idlelib 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): global interruptable try: self.usr_exc_info = None interruptable = True try: exec(code, self.locals) finally: interruptable = False 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): if interruptable: 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)