220 lines
7.5 KiB
Python
220 lines
7.5 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Client for a per-analysis execution worker subprocess.
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"""
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import json
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import os
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import queue
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import subprocess
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import sys
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import threading
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import uuid
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from typing import Any, Dict, Optional
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class WorkerSessionError(RuntimeError):
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"""Raised when the execution worker cannot serve a request."""
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class WorkerTimeoutError(WorkerSessionError):
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"""Raised when the worker does not respond within the configured timeout."""
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class ExecutionSessionClient:
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"""Client that proxies CodeExecutor methods to a dedicated worker process."""
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def __init__(
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self,
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output_dir: str,
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allowed_files=None,
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python_executable: str = None,
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request_timeout_seconds: float = 60.0,
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startup_timeout_seconds: float = 180.0,
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):
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self.output_dir = os.path.abspath(output_dir)
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self.allowed_files = [os.path.abspath(path) for path in (allowed_files or [])]
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self.allowed_read_roots = sorted(
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{os.path.dirname(path) for path in self.allowed_files}
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)
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self.python_executable = python_executable or sys.executable
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self.request_timeout_seconds = request_timeout_seconds
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self.startup_timeout_seconds = startup_timeout_seconds
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self._process: Optional[subprocess.Popen] = None
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self._stderr_handle = None
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self._start_worker()
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self._request(
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"init_session",
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{
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"output_dir": self.output_dir,
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"variables": {
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"session_output_dir": self.output_dir,
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"allowed_files": self.allowed_files,
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"allowed_read_roots": self.allowed_read_roots,
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},
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},
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timeout_seconds=self.startup_timeout_seconds,
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)
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def execute_code(self, code: str) -> Dict[str, Any]:
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return self._request("execute_code", {"code": code})
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def set_variable(self, name: str, value: Any) -> None:
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self._request("set_variable", {"name": name, "value": value})
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def get_environment_info(self) -> str:
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payload = self._request("get_environment_info", {})
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return payload.get("environment_info", "")
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def reset_environment(self) -> None:
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self._request("reset_environment", {})
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self.set_variable("session_output_dir", self.output_dir)
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self.set_variable("allowed_files", self.allowed_files)
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self.set_variable("allowed_read_roots", self.allowed_read_roots)
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def ping(self) -> bool:
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payload = self._request("ping", {})
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return bool(payload.get("alive"))
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def close(self) -> None:
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if self._process is None:
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return
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try:
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if self._process.poll() is None:
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self._request("shutdown", {}, timeout_seconds=5)
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except Exception:
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pass
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finally:
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self._teardown_worker()
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def _start_worker(self) -> None:
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runtime_dir = os.path.join(self.output_dir, ".worker_runtime")
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mpl_dir = os.path.join(runtime_dir, "mplconfig")
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ipython_dir = os.path.join(runtime_dir, "ipython")
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os.makedirs(mpl_dir, exist_ok=True)
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os.makedirs(ipython_dir, exist_ok=True)
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stderr_log_path = os.path.join(self.output_dir, "execution_worker.log")
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self._stderr_handle = open(stderr_log_path, "a", encoding="utf-8")
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worker_script = os.path.join(
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os.path.dirname(__file__),
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"execution_worker.py",
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)
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env = os.environ.copy()
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env["MPLCONFIGDIR"] = mpl_dir
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env["IPYTHONDIR"] = ipython_dir
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env.setdefault("PYTHONIOENCODING", "utf-8")
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self._process = subprocess.Popen(
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[self.python_executable, worker_script],
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stdin=subprocess.PIPE,
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stdout=subprocess.PIPE,
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stderr=self._stderr_handle,
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text=True,
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encoding="utf-8",
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cwd=os.path.abspath(os.path.join(os.path.dirname(__file__), "..")),
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env=env,
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bufsize=1,
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)
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def _request(
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self,
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request_type: str,
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payload: Dict[str, Any],
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timeout_seconds: float = None,
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) -> Dict[str, Any]:
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if self._process is None or self._process.stdin is None or self._process.stdout is None:
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raise WorkerSessionError("执行子进程未启动")
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if self._process.poll() is not None:
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raise WorkerSessionError(
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f"执行子进程已退出，退出码: {self._process.returncode}"
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)
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request_id = str(uuid.uuid4())
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message = {
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"request_id": request_id,
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"type": request_type,
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"payload": payload,
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}
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try:
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self._process.stdin.write(json.dumps(message, ensure_ascii=False) + "\n")
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self._process.stdin.flush()
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except BrokenPipeError as exc:
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self._teardown_worker()
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raise WorkerSessionError("执行子进程通信中断") from exc
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effective_timeout = (
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self.request_timeout_seconds
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if timeout_seconds is None
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else timeout_seconds
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)
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response_line = self._read_response_line(effective_timeout)
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if not response_line:
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if self._process.poll() is not None:
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exit_code = self._process.returncode
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self._teardown_worker()
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raise WorkerSessionError(f"执行子进程已异常退出，退出码: {exit_code}")
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raise WorkerSessionError("执行子进程未返回响应")
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try:
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response = json.loads(response_line)
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except json.JSONDecodeError as exc:
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raise WorkerSessionError(f"执行子进程返回了无效JSON: {response_line}") from exc
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if response.get("request_id") != request_id:
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raise WorkerSessionError("执行子进程响应 request_id 不匹配")
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if response.get("status") != "ok":
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raise WorkerSessionError(response.get("error", "执行子进程返回未知错误"))
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return response.get("payload", {})
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def _read_response_line(self, timeout_seconds: float) -> str:
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assert self._process is not None and self._process.stdout is not None
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response_queue: queue.Queue = queue.Queue(maxsize=1)
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def _reader() -> None:
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try:
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response_queue.put((True, self._process.stdout.readline()))
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except Exception as exc:
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response_queue.put((False, exc))
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thread = threading.Thread(target=_reader, daemon=True)
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thread.start()
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try:
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success, value = response_queue.get(timeout=timeout_seconds)
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except queue.Empty as exc:
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self._teardown_worker(force=True)
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raise WorkerTimeoutError(
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f"执行子进程在 {timeout_seconds:.1f} 秒内未响应，已终止当前会话"
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) from exc
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if success:
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return value
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self._teardown_worker()
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raise WorkerSessionError(f"读取执行子进程响应失败: {value}")
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def _teardown_worker(self, force: bool = False) -> None:
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if self._process is not None and self._process.poll() is None:
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self._process.terminate()
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try:
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self._process.wait(timeout=5)
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except subprocess.TimeoutExpired:
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self._process.kill()
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self._process.wait(timeout=5)
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if self._stderr_handle is not None:
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self._stderr_handle.close()
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self._stderr_handle = None
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self._process = None
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def __del__(self):
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self.close()
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