pythonVSCode/pythonFiles/PythonTools/ipythonServer.py at master · mahajang/pythonVSCode · GitHub

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import sys

import socket

import select

import time

import re

import json

import struct

import imp

import traceback

import random

import os

import io

import inspect

import types

from collections import deque

import os

import warnings

from encodings import utf_8, ascii

try:

import thread

except ImportError:

# Renamed in Python3k

import _thread as thread

# Reference material

# http://jupyter-client.readthedocs.io/en/latest/messaging.html

# http://pydoc.net/Python/magni/1.4.0/magni.tests.ipynb_examples/

# http://www.xavierdupre.fr/app/pyquickhelper/helpsphinx/_modules/pyquickhelper/ipythonhelper/notebook_runner.html

import visualstudio_py_util as _vspu

to_bytes = _vspu.to_bytes

read_bytes = _vspu.read_bytes

read_int = _vspu.read_int

read_string = _vspu.read_string

write_bytes = _vspu.write_bytes

write_int = _vspu.write_int

write_string = _vspu.write_string

try:

unicode

except NameError:

unicode = str

try:

BaseException

except NameError:

# BaseException not defined until Python 2.5

BaseException = Exception

try:

from Queue import Empty, Queue # Python 2

except ImportError:

from queue import Empty, Queue # Python 3

DEBUG = os.environ.get('DEBUG_DJAYAMANNE_IPYTHON', '0') == '1'

TEST = os.environ.get('PYTHON_DONJAYAMANNE_TEST', '0') == '1'

# The great "support IPython 2, 3, 4" strat begins

if not TEST:

try:

import jupyter

except ImportError:

jupyter_era = False

else:

jupyter_era = True

if jupyter_era:

# Jupyter / IPython 4.x

from jupyter_client import KernelManager

from jupyter_client.kernelspec import KernelSpecManager

from jupyter_client import MultiKernelManager

kernelSpecManager = KernelSpecManager()

multiKernelManager = MultiKernelManager()

else:

from IPython.kernel import KernelManager

from IPython.kernel.kernelspec import KernelSpecManager

from IPython.kernel.multikernelmanager import MultiKernelManager

kernelSpecManager = KernelSpecManager()

multiKernelManager = MultiKernelManager()

# End of the great "support IPython 2, 3, 4" strat

def _debug_write(out):

if DEBUG:

sys.__stdout__.write(out)

sys.__stdout__.write("\n")

sys.__stdout__.flush()

def listKernelSpecs():

"""Returns a dict mapping kernel names to resource directories."""

return kernelSpecManager.get_all_specs()

class IPythonExitException(Exception):

pass

class SafeSendLock(object):

"""a lock which ensures we're released if we take a KeyboardInterrupt exception acquiring it"""

def __init__(self):

self.lock = thread.allocate_lock()

def __enter__(self):

self.acquire()

def __exit__(self, exc_type, exc_value, tb):

self.release()

def acquire(self):

try:

self.lock.acquire()

except KeyboardInterrupt:

try:

self.lock.release()

except:

pass

raise

def release(self):

self.lock.release()

class iPythonKernelResponseMonitor(object):

def __init__(self, kernelUUID, socketConnection, send_lock, shell_channel, iopub_channel):

import threading

self.kernel = multiKernelManager.get_kernel(kernelUUID)

self.conn = socketConnection

self.is_stop_requested = False

self.shell_channel = shell_channel

self.iopub_channel = iopub_channel

self.send_lock = send_lock

thread.start_new_thread(self.start_processing, ('shell', 1))

thread.start_new_thread(self.start_processing, ('io', 1))

def stop(self):

self.is_stop_requested = True

def check_for_exit_socket_loop(self):

return self.is_stop_requested

def _populateErrorContents(self, sourceContents, targetContents):

try:

targetContents.ename = sourceContents.ename

targetContents.evalue = sourceContents.evalue

targetContents.traceback = sourceContents.traceback

except AttributeError:

pass

def start_processing(self, channel, *args):

"""loop to read the io ports/messages"""

_debug_write('Started processing thread')

try:

while True:

if self.check_for_exit_socket_loop():

break

# message can be JSON, but not always

# (http://jupyter-client.readthedocs.io/en/latest/messaging.html)

# assume for now that dates are the only crappy (non JSONable

# stuff sent)

if channel == 'shell':

try:

exe_result = self.shell_channel.get_shell_msg(

timeout=30)

json_to_send = json.dumps(exe_result, default=str)

with self.send_lock:

_debug_write('shell_result')

write_bytes(self.conn, iPythonSocketServer._SHEL)

write_string(self.conn, json_to_send)

except Empty:

pass

if channel == 'io':

try:

msg = self.iopub_channel.get_iopub_msg(timeout=30)

json_to_send = json.dumps(msg, default=str)

with self.send_lock:

_debug_write('iopub_msg')

write_bytes(self.conn, iPythonSocketServer._IOPB)

write_string(self.conn, json_to_send)

except Empty:

pass

except IPythonExitException:

_debug_write('IPythonExitException')

_debug_write(traceback.format_exc())

pass

except socket.error:

_debug_write('socket error')

_debug_write(traceback.format_exc())

pass

except:

print('crap')

_debug_write('error in repl loop')

_debug_write(traceback.format_exc())

# try and exit gracefully, then interrupt main if necessary

time.sleep(2)

traceback.print_exc()

self.exit_process()

class iPythonSocketServer(object):

"""back end for executing code in kernel. Handles all of the communication with the remote process."""

"""Messages sent back as responses"""

_PONG = to_bytes('PONG')

_EXIT = to_bytes('EXIT')

_LSKS = to_bytes('LSKS')

_EROR = to_bytes('EROR')

_TEST = to_bytes('TEST')

_STRK = to_bytes('STRK')

_STPK = to_bytes('STPK')

_RSTK = to_bytes('RSTK')

_ITPK = to_bytes('ITPK')

_RUN = to_bytes('RUN ')

_SHEL = to_bytes('SHEL')

_IOPB = to_bytes('IOPB')

def __init__(self):

import threading

self.conn = None

self.send_lock = SafeSendLock()

self.input_event = threading.Lock()

# lock starts acquired (we use it like a manual reset event)

self.input_event.acquire()

self.input_string = None

self.exit_requested = False

self.kernelMonitor = None

self.shell_channel = None

def connect(self, port):

# start a new thread for communicating w/ the remote process

_debug_write('Connecting to socket port: ' + str(port))

self.conn = socket.socket(socket.AF_INET, socket.SOCK_STREAM)

self.conn.connect(('127.0.0.1', port))

_debug_write('Connected to socket')

# perform the handshake

with self.send_lock:

write_string(self.conn, "Some Guid")

write_int(self.conn, os.getpid())

_debug_write('Handshake information sent')

thread.start_new_thread(self.start_processing, ())

def start_processing(self):

"""loop on created thread which processes communicates with the REPL window"""

_debug_write('Started processing thread')

try:

while True:

if self.check_for_exit_socket_loop():

break

# we receive a series of 4 byte commands. Each command then

# has it's own format which we must parse before continuing to

# the next command.

self.flush()

self.conn.settimeout(10)

try:

inp = read_bytes(self.conn, 4)

self.conn.settimeout(None)

cmd = iPythonSocketServer._COMMANDS.get(inp)

if inp and cmd is not None:

id = ""

try:

if iPythonSocketServer._COMMANDS_WITH_IDS.get(inp) == True:

while True:

try:

id = read_string(self.conn)

break

except socket.timeout:

pass

cmd(self, id)

else:

cmd(self)

except:

commandName = utf_8.decode(inp)[0]

try:

commandName = ascii.Codec.encode(commandName)[

except UnicodeEncodeError:

pass

self.replyWithError(commandName, id)

else:

if inp:

print ('unknown command', inp)

break

except socket.timeout:

pass

except IPythonExitException:

_debug_write('IPythonExitException')

_debug_write(traceback.format_exc())

pass

except socket.error:

_debug_write('socket error')

_debug_write(traceback.format_exc())

pass

except:

print('crap')

_debug_write('error in repl loop')

_debug_write(traceback.format_exc())

# try and exit gracefully, then interrupt main if necessary

time.sleep(2)

traceback.print_exc()

self.exit_process()

def check_for_exit_socket_loop(self):

return self.exit_requested

def replyWithError(self, commandName, id):

with self.send_lock:

traceMessage = traceback.format_exc()

_debug_write('Replying with error:' + traceMessage)

write_bytes(self.conn, iPythonSocketServer._EROR)

write_string(self.conn, commandName)

write_string(self.conn, "" if id is None else id)

write_string(self.conn, traceMessage)

def _cmd_exit(self):

"""exits the interactive process"""

self.exit_requested = True

self.exit_process()

def _cmd_ping(self, id):

"""ping"""

_debug_write('Ping received')

while True:

try:

message = read_string(self.conn)

break

except socket.timeout:

pass

with self.send_lock:

_debug_write('Pong response being sent out')

write_bytes(self.conn, iPythonSocketServer._PONG)

write_string(self.conn, id)

write_string(self.conn, message)

def _cmd_lstk(self, id):

"""List kernel specs"""

_debug_write('Listing kernel specs')

kernelspecs = json.dumps(listKernelSpecs())

with self.send_lock:

_debug_write('Replying with kernel Specs')

write_bytes(self.conn, iPythonSocketServer._LSKS)

write_string(self.conn, id)

write_string(self.conn, kernelspecs)

def _cmd_strk(self, id):

"""Start a kernel by name"""

_debug_write('Listing kernel specs')

while True:

try:

kernelName = read_string(self.conn)

break

except socket.timeout:

pass

kernelUUID = multiKernelManager.start_kernel(kernel_name=kernelName)

self._postStartKernel(kernelUUID)

# get the config and the connection FileExistsError

try:

config = kernel_manager.config

except:

config = {}

try:

connection_file = kernel_manager.connection_file

except:

connection_file = ""

with self.send_lock:

_debug_write('Replying with kernel Specs= ' + str(kernelUUID))

write_bytes(self.conn, iPythonSocketServer._STRK)

write_string(self.conn, id)

write_string(self.conn, str(kernelUUID))

write_string(self.conn, json.dumps(config))

write_string(self.conn, connection_file)

def _postStartKernel(self, kernelUUID):

kernel_manager = multiKernelManager.get_kernel(kernelUUID)

kernel_client = kernel_manager.client()

kernel_client.start_channels()

try:

# IPython 3.x

kernel_client.wait_for_ready()

iopub = kernel_client

shell = kernel_client

# todo: get_stdin_msg

except AttributeError:

# Ipython 2.x

# Based on https://github.com/paulgb/runipy/pull/49/files

iopub = kernel_client.iopub_channel

shell = kernel_client.shell_channel

shell.get_shell_msg = shell.get_msg

iopub.get_iopub_msg = iopub.get_msg

# todo: get_stdin_msg

self.shell_channel = shell

self.kernelMonitor = iPythonKernelResponseMonitor(

kernelUUID, self.conn, self.send_lock, shell, iopub)

def _cmd_stpk(self, id):

"""Shutdown a kernel by UUID"""

while True:

try:

kernelUUID = read_string(self.conn)

break

except socket.timeout:

pass

try:

if self.kernelMonitor is not None:

self.kernelMonitor.stop()

finally:

pass

try:

kernel_manager = multiKernelManager.get_kernel(kernelUUID)

kernel_client = kernel_manager.client()

kernel_client.stop_channels()

finally:

pass

try:

kernel_manager = multiKernelManager.get_kernel(kernelUUID)

kernel_manager.shutdown_kernel()

except:

pass

finally:

self.shell_channel = None

self.kernelMonitor = None

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._STPK)

write_string(self.conn, id)

def _cmd_rstk(self, id):

"""Restart a kernel by UUID"""

while True:

try:

kernelUUID = read_string(self.conn)

break

except socket.timeout:

pass

kernel_manager = multiKernelManager.get_kernel(kernelUUID)

kernel_manager.restart_kernel(now=True)

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._RSTK)

write_string(self.conn, id)

def _cmd_itpk(self, id):

"""Interrupt a kernel by UUID"""

while True:

try:

kernelUUID = read_string(self.conn)

break

except socket.timeout:

pass

kernel_manager = multiKernelManager.get_kernel(kernelUUID)

kernel_manager.interrupt_kernel()

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._ITPK)

write_string(self.conn, id)

def _cmd_run(self, id):

"""runs the received snippet of code (kernel is expected to have been started)"""

while True:

try:

code = read_string(self.conn)

break

except socket.timeout:

pass

msg_id = self.shell_channel.execute(code)

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._RUN)

write_string(self.conn, id)

write_string(self.conn, msg_id)

def _cmd_abrt(self):

"""aborts the current running command"""

# abort command, interrupts execution of the main thread.

pass

def _cmd_inpl(self):

"""handles the input command which returns a string of input"""

self.input_string = read_string(self.conn)

self.input_event.release()

def send_prompt(self, ps1, ps2, update_all=True):

"""sends the current prompt to the interactive window"""

# with self.send_lock:

# write_bytes(self.conn, iPythonSocketServer._PRPC)

# write_string(self.conn, ps1)

# write_string(self.conn, ps2)

# write_int(self.conn, update_all)

pass

def send_error(self):

"""reports that an error occured to the interactive window"""

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._ERRE)

def send_exit(self):

"""reports the that the REPL process has exited to the interactive window"""

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._EXIT)

def send_command_executed(self):

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._DONE)

def read_line(self):

"""reads a line of input from standard input"""

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._RDLN)

self.input_event.acquire()

return self.input_string

def write_stdout(self, value):

"""writes a string to standard output in the remote console"""

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._STDO)

write_string(self.conn, value)

def write_stderr(self, value):

"""writes a string to standard input in the remote console"""

with self.send_lock:

write_bytes(self.conn, iPythonSocketServer._STDE)

write_string(self.conn, value)

################################################################

# Implementation of execution, etc...

def execution_loop(self):

"""loop on the main thread which is responsible for executing code"""

while True:

exit = self.run_one_command(cur_modules, cur_ps1, cur_ps2)

if exit:

return

def run_command(self, command):

"""runs the specified command which is a string containing code"""

pass

def interrupt_main(self):

"""aborts the current running command"""

pass

def exit_process(self):

"""exits the REPL process"""

# TODO: Probably should cleanly shutdown the kernels

sys.exit(0)

def flush(self):

"""flushes the stdout/stderr buffers"""

pass

_COMMANDS = {

to_bytes('run '): _cmd_run,

to_bytes('abrt'): _cmd_abrt,

to_bytes('exit'): _cmd_exit,

to_bytes('ping'): _cmd_ping,

to_bytes('inpl'): _cmd_inpl,

to_bytes('lsks'): _cmd_lstk,

to_bytes('strk'): _cmd_strk,

to_bytes('stpk'): _cmd_stpk,

to_bytes('rstk'): _cmd_rstk,

to_bytes('itpk'): _cmd_itpk,

}

_COMMANDS_WITH_IDS = {

to_bytes('lsks'): True,

to_bytes('ping'): True,

to_bytes('strk'): True,

to_bytes('stpk'): True,

to_bytes('rstk'): True,

to_bytes('itpk'): True,

to_bytes('run '): True,

}

def exit_work_item():

sys.exit(0)

class iPythonReadLine(object):

def __init__(self):

self._input = io.open(sys.stdin.fileno(), encoding='utf-8')

def _deserialize(self, request):

"""Deserialize request from VSCode.

Args:

request: String with raw request from VSCode.

Returns:

Python dictionary with request data.

"""

return json.loads(request)

def _set_request_config(self, config):

self.use_snippets = config.get('useSnippets')

self.show_doc_strings = config.get('showDescriptions', True)

self.fuzzy_matcher = config.get('fuzzyMatcher', False)

def _process_request(self, request):

"""Accept serialized request from VSCode and write response.

"""

request = self._deserialize(request)

self._set_request_config(request.get('config', {}))

lookup = request.get('lookup', 'completions')

if lookup == 'definitions':

return self._write_response('defs')

elif lookup == 'arguments':

return self._write_response('arguments')

elif lookup == 'usages':

return self._write_response('usages')

else:

return self._write_response('Dont Know')

def _write_response(self, response):

sys.stdout.write(response + '\n')

sys.stdout.flush()

def watch(self):

port = int(sys.argv[1])

_debug_write('Socket port received: ' + str(port))

server = iPythonSocketServer()

server.connect(port)

sys.__stdout__.write('Started')

sys.__stdout__.write("\n")

sys.__stdout__.flush()

while True:

try:

self._process_request(self._input.readline())

except Exception:

sys.stderr.write(traceback.format_exc() + '\n')

sys.stderr.flush()

if __name__ == '__main__':

iPythonReadLine().watch()

pythonVSCode/pythonFiles/PythonTools/ipythonServer.py at master · mahajang/pythonVSCode · GitHub

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