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from typing import Dict, List, Optional, Union

import sys

import json

import contextlib

import io

import traceback

import uuid

import ast

STDIN = sys.stdin

STDOUT = sys.stdout

STDERR = sys.stderr

USER_GLOBALS = {}

def send_message(msg: str):

length_msg = len(msg)

STDOUT.buffer.write(f"Content-Length: {length_msg}\r\n\r\n{msg}".encode(encoding="utf-8"))

STDOUT.buffer.flush()

def print_log(msg: str):

send_message(json.dumps({"jsonrpc": "2.0", "method": "log", "params": msg}))

def send_response(response: str, response_id: int):

send_message(json.dumps({"jsonrpc": "2.0", "id": response_id, "result": response}))

def send_request(params: Optional[Union[List, Dict]] = None):

request_id = uuid.uuid4().hex

if params is None:

send_message(json.dumps({"jsonrpc": "2.0", "id": request_id, "method": "input"}))

else:

send_message(

json.dumps({"jsonrpc": "2.0", "id": request_id, "method": "input", "params": params})

)

return request_id

original_input = input

def custom_input(prompt=""):

try:

send_request({"prompt": prompt})

headers = get_headers()

content_length = int(headers.get("Content-Length", 0))

if content_length:

message_text = STDIN.read(content_length)

message_json = json.loads(message_text)

our_user_input = message_json["result"]["userInput"]

return our_user_input

except Exception:

print_log(traceback.format_exc())

# Set input to our custom input

USER_GLOBALS["input"] = custom_input

input = custom_input

def handle_response(request_id):

while not STDIN.closed:

try:

headers = get_headers()

content_length = int(headers.get("Content-Length", 0))

if content_length:

message_text = STDIN.read(content_length)

message_json = json.loads(message_text)

our_user_input = message_json["result"]["userInput"]

if message_json["id"] == request_id:

send_response(our_user_input, message_json["id"])

elif message_json["method"] == "exit":

sys.exit(0)

except Exception:

print_log(traceback.format_exc())

def exec_function(user_input):

try:

compile(user_input, "<stdin>", "eval")

except SyntaxError:

return exec

return eval

def check_valid_command(request):

try:

user_input = request["params"]

ast.parse(user_input[0])

send_response("True", request["id"])

except SyntaxError:

send_response("False", request["id"])

def execute(request, user_globals):

str_output = CustomIO("<stdout>", encoding="utf-8")

str_error = CustomIO("<stderr>", encoding="utf-8")

with redirect_io("stdout", str_output):

with redirect_io("stderr", str_error):

str_input = CustomIO("<stdin>", encoding="utf-8", newline="\n")

with redirect_io("stdin", str_input):

exec_user_input(request["params"], user_globals)

send_response(str_output.get_value(), request["id"])

def exec_user_input(user_input, user_globals):

user_input = user_input[0] if isinstance(user_input, list) else user_input

try:

callable = exec_function(user_input)

retval = callable(user_input, user_globals)

if retval is not None:

print(retval)

except KeyboardInterrupt:

print(traceback.format_exc())

except Exception:

print(traceback.format_exc())

class CustomIO(io.TextIOWrapper):

"""Custom stream object to replace stdio."""

def __init__(self, name, encoding="utf-8", newline=None):

self._buffer = io.BytesIO()

self._custom_name = name

super().__init__(self._buffer, encoding=encoding, newline=newline)

def close(self):

"""Provide this close method which is used by some tools."""

# This is intentionally empty.

def get_value(self) -> str:

"""Returns value from the buffer as string."""

self.seek(0)

return self.read()

@contextlib.contextmanager

def redirect_io(stream: str, new_stream):

"""Redirect stdio streams to a custom stream."""

old_stream = getattr(sys, stream)

setattr(sys, stream, new_stream)

yield

setattr(sys, stream, old_stream)

def get_headers():

headers = {}

while line := STDIN.readline().strip():

name, value = line.split(":", 1)

headers[name] = value.strip()

return headers

if __name__ == "__main__":

while not STDIN.closed:

try:

headers = get_headers()

content_length = int(headers.get("Content-Length", 0))

if content_length:

request_text = STDIN.read(content_length)

request_json = json.loads(request_text)

if request_json["method"] == "execute":

execute(request_json, USER_GLOBALS)

if request_json["method"] == "check_valid_command":

check_valid_command(request_json)

elif request_json["method"] == "exit":

sys.exit(0)

except Exception:

print_log(traceback.format_exc())