GeezerVison is showing github.com — pythonVSCode/python_files/python_server.py at main · DonJayamanne/pythonVSCode

Expand file tree

python_server.py

Copy path

More file actions

Latest commit

History

178 lines (135 loc) · 5.15 KB

python_server.py

Copy path

File metadata and controls

178 lines (135 loc) · 5.15 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

100

101

102

103

104

105

106

107

108

109

110

111

112

113

114

115

116

117

118

119

120

121

122

123

124

125

126

127

128

129

130

131

132

133

134

135

136

137

138

139

140

141

142

143

144

145

146

147

148

149

150

151

152

153

154

155

156

157

158

159

160

161

162

163

164

165

166

167

168

169

170

171

172

173

174

175

176

177

178

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())