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273d53f faefb1f 273d53f faefb1f 273d53f 62aa98f 273d53f 62aa98f 4b54fab 273d53f | 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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 | from __future__ import annotations
import asyncio
import logging
import re
import shutil
import tempfile
import time
from pathlib import Path
from typing import Optional
from app.config import get_settings
from app.utils.subprocess_utils import run_subprocess
_logger = logging.getLogger(__name__)
_APP_DIR = Path(__file__).resolve().parent
_settings = get_settings()
class CodeSanitizer:
_BLOCKED_PATTERNS: dict[str, list[tuple[str, str]]] = {
"python": [
(r"import\s+subprocess\b", "subprocess not allowed"),
(r"from\s+subprocess\b", "subprocess not allowed"),
(r"import\s+ctypes\b", "ctypes not allowed"),
(r"from\s+ctypes\b", "ctypes not allowed"),
(r"import\s+os\b", "os not allowed"),
(r"from\s+os\b", "os not allowed"),
(r"import\s+sys\b", "sys not allowed"),
(r"from\s+sys\b", "sys not allowed"),
(r"import\s+socket\b", "socket not allowed"),
(r"from\s+socket\b", "socket not allowed"),
(r"import\s+builtins\b", "builtins not allowed"),
(r"from\s+builtins\b", "builtins not allowed"),
(r"import\s+signal\b", "signal not allowed"),
(r"from\s+signal\b", "signal not allowed"),
(r"import\s+shutil\b", "shutil not allowed"),
(r"from\s+shutil\b", "shutil not allowed"),
(r"__import__\s*\(", "__import__() not allowed"),
(r"exec\s*\(", "exec() not allowed"),
(r"eval\s*\(", "eval() not allowed"),
(r"compile\s*\(", "compile() not allowed"),
(r"\.__subclasses__\s*\(\)", "subclass escape not allowed"),
(r"\.__bases__", "__bases__ not allowed"),
(r"\.__mro__", "__mro__ not allowed"),
(r"\.__globals__", "__globals__ not allowed"),
(r"\.__code__", "__code__ not allowed"),
(r"\.__closure__", "__closure__ not allowed"),
(r"\.__dict__", "__dict__ not allowed"),
(r"\.__builtins__", "__builtins__ not allowed"),
(r"\.__class__", "__class__ not allowed"),
],
"javascript": [
(r"require\s*\(", "require() not allowed"),
(r"process\s*\.", "process not allowed"),
(r"__dirname", "__dirname not allowed"),
(r"__filename", "__filename not allowed"),
(r"global\s*\.", "global not allowed"),
(r"globalThis\s*\.", "globalThis not allowed"),
(r"eval\s*\(", "eval() not allowed"),
(r"Function\s*\(", "Function() constructor not allowed"),
(r"child_process", "child_process not allowed"),
(r"fs\s*\.", "fs not allowed"),
(r"net\s*\.", "net not allowed"),
(r"http\s*\.", "http not allowed"),
(r"https\s*\.", "https not allowed"),
(r"worker_threads", "worker_threads not allowed"),
(r"Buffer\s*\.", "Buffer not allowed"),
],
}
@classmethod
def sanitize(cls, code: str, language: str) -> tuple[bool, Optional[str]]:
patterns = cls._BLOCKED_PATTERNS.get(language, [])
for pattern, message in patterns:
if re.search(pattern, code):
return False, f"Forbidden: {message}"
return True, None
class CodeExecutorService:
def __init__(self) -> None:
self._max_execution_time = _settings.code_exec_max_time
self._max_output_bytes = _settings.code_exec_max_output
self._max_memory_mb = _settings.code_exec_max_memory
self._semaphore = asyncio.Semaphore(_settings.code_exec_max_concurrent)
self._workdir = Path(_settings.code_exec_workdir)
self._workdir.mkdir(parents=True, exist_ok=True)
async def execute(
self,
code: str,
language: str,
timeout: Optional[int] = None,
) -> dict:
sanitized, err = CodeSanitizer.sanitize(code, language)
if not sanitized:
return {
"success": False, "output": "", "error": err,
"exit_code": None, "execution_time_ms": None,
"language": language, "timed_out": False,
}
exec_timeout = min(timeout or self._max_execution_time, self._max_execution_time)
async with self._semaphore:
run_dir = None
start_time = time.monotonic()
try:
run_dir = Path(tempfile.mkdtemp(dir=self._workdir))
filename = self._filename_for(language)
src_path = run_dir / filename
src_path.write_text(code, encoding="utf-8")
cmd = self._build_command(language, run_dir, filename)
result = await asyncio.to_thread(
self._run_subprocess, cmd, exec_timeout,
)
elapsed_ms = (time.monotonic() - start_time) * 1000
if result["timed_out"]:
return {
"success": False,
"output": result["stdout"],
"error": f"Execution timed out after {exec_timeout}s",
"exit_code": result["exit_code"],
"execution_time_ms": round(elapsed_ms, 2),
"language": language,
"timed_out": True,
}
return {
"success": result["exit_code"] == 0 if result["exit_code"] is not None else False,
"output": result["stdout"],
"error": result["stderr"] or None,
"exit_code": result["exit_code"],
"execution_time_ms": round(elapsed_ms, 2),
"language": language,
"timed_out": False,
}
except FileNotFoundError as exc:
_logger.error("Runtime not found: %s", exc)
return {
"success": False, "output": "", "error": f"Runtime not found: {exc.filename}",
"execution_time_ms": None, "language": language, "timed_out": False,
}
except Exception as exc:
_logger.exception("Executor error")
return {
"success": False, "output": "", "error": f"Internal error: {exc}",
"execution_time_ms": None, "language": language, "timed_out": False,
}
finally:
if run_dir and run_dir.exists():
try:
shutil.rmtree(run_dir, ignore_errors=True)
except Exception:
pass
def _run_subprocess(
self,
cmd: list[str],
timeout: float,
) -> dict:
return run_subprocess(cmd, timeout, self._max_output_bytes)
async def check_runtimes(self) -> dict[str, str]:
status = {}
for lang, runtime in [("python", "python3"), ("javascript", "node")]:
path = shutil.which(runtime)
status[lang] = f"found at {path}" if path else "missing"
return status
@staticmethod
def _filename_for(language: str) -> str:
return {"python": "code.py", "javascript": "code.js"
}[language]
@staticmethod
def _build_command(language: str, run_dir: Path, filename: str) -> list[str]:
sandbox_py = _APP_DIR / "py_sandbox.py"
sandbox_js = _APP_DIR / "js_sandbox.js"
if language == "python":
return ["python3", str(sandbox_py), str(run_dir / filename)]
elif language == "javascript":
return ["node", str(sandbox_js), str(run_dir / filename)]
return []
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