Repository navigation
Expand file tree
/
Copy pathpython_server.py
More file actions
167 lines (125 loc) · 4.79 KB
/
Copy pathpython_server.py
File metadata and controls
167 lines (125 loc) · 4.79 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
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
from typing import Dict, List, Optional, Union
import sys
import json
import contextlib
import io
import traceback
import uuid
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 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)
elif request_json["method"] == "exit":
sys.exit(0)
except Exception:
print_log(traceback.format_exc())