vscode-python/python_files/python_server.py at main · senese/vscode-python · GitHub

History

214 lines (171 loc) · 6.41 KB

Raw

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

179

180

181

182

183

184

185

186

187

188

189

190

191

192

193

194

195

196

197

198

199

200

201

202

203

204

205

206

207

208

209

210

211

212

213

214

import ast

import contextlib

import io

import json

import sys

import traceback

import uuid

from pathlib import Path

from typing import Dict, List, Optional, Union

STDIN = sys.stdin

STDOUT = sys.stdout

STDERR = sys.stderr

USER_GLOBALS = {}

def _send_message(msg: str):

# Content-Length is the data size in bytes.

length_msg = len(msg.encode())

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

STDOUT.buffer.flush()

def send_message(**kwargs):

_send_message(json.dumps({"jsonrpc": "2.0", **kwargs}))

def print_log(msg: str):

send_message(method="log", params=msg)

def send_response(

response: str,

response_id: int,

execution_status: bool = True, # noqa: FBT001, FBT002

send_message(

id=response_id,

result={"status": execution_status, "output": response},

)

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

request_id = uuid.uuid4().hex

if params is None:

send_message(id=request_id, method="input")

else:

send_message(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 is the data size in bytes.

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

if content_length:

message_text = STDIN.buffer.read(content_length).decode()

message_json = json.loads(message_text)

return message_json["result"]["userInput"]

except EOFError:

# Input stream closed, exit gracefully

sys.exit(0)

except Exception:

print_log(traceback.format_exc())

# Set input to our custom input

USER_GLOBALS["input"] = custom_input

input = custom_input # noqa: A001

def handle_response(request_id):

while True:

try:

headers = get_headers()

# Content-Length is the data size in bytes.

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

if content_length:

message_text = STDIN.buffer.read(content_length).decode()

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 EOFError: # noqa: PERF203

# Input stream closed, exit gracefully

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")

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

with contextlib.redirect_stdout(str_output), contextlib.redirect_stderr(str_error):

original_stdin = sys.stdin

try:

sys.stdin = str_input

execution_status = exec_user_input(request["params"], user_globals)

finally:

sys.stdin = original_stdin

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

def exec_user_input(user_input, user_globals) -> bool:

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)

return True

except KeyboardInterrupt:

print(traceback.format_exc())

return False

except Exception:

print(traceback.format_exc())

return False

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()

def get_headers():

headers = {}

while True:

raw = STDIN.buffer.readline()

# Detect EOF: readline() returns empty bytes when input stream is closed

if raw == b"":

raise EOFError("EOF reached while reading headers")

line = raw.decode().strip()

if not line:

break

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

headers[name] = value.strip()

return headers

if __name__ == "__main__":

# https://docs.python.org/3/tutorial/modules.html#the-module-search-path

# The directory containing the input script (or the current directory when no file is specified).

# Here we emulate the same behavior like no file is specified.

input_script_dir = Path(__file__).parent

script_dir_str = str(input_script_dir)

if script_dir_str in sys.path:

sys.path.remove(script_dir_str)

while "" in sys.path:

sys.path.remove("")

sys.path.insert(0, "")

while True:

try:

headers = get_headers()

# Content-Length is the data size in bytes.

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

if content_length:

request_text = STDIN.buffer.read(content_length).decode()

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 EOFError: # noqa: PERF203

# Input stream closed (VS Code terminated), exit gracefully

sys.exit(0)

except Exception:

print_log(traceback.format_exc())

vscode-python/python_files/python_server.py at main · senese/vscode-python · GitHub

Expand file tree

Breadcrumbs

python_server.py

Latest commit

History

Breadcrumbs

python_server.py

File metadata and controls