570 lines
22 KiB
Python
570 lines
22 KiB
Python
"""简单任务 API：将聊天任务与 WebSocket 解耦，支持后台运行与轮询。"""
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from __future__ import annotations
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import mimetypes
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import time
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import threading
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import uuid
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from collections import deque
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from typing import Dict, Any, Optional, List
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from flask import Blueprint, request, jsonify
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from flask import current_app, session
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from .auth_helpers import api_login_required, get_current_username
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from .context import get_user_resources, ensure_conversation_loaded
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from .chat_flow import run_chat_task_sync
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from .state import stop_flags
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from .utils_common import debug_log
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from utils.host_workspace_debug import write_host_workspace_debug
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class TaskRecord:
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__slots__ = (
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"task_id",
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"username",
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"workspace_id",
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"status",
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"created_at",
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"updated_at",
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"message",
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"conversation_id",
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"events",
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"thread",
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"error",
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"model_key",
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"thinking_mode",
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"run_mode",
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"max_iterations",
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"session_data",
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"stop_requested",
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"next_event_idx",
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)
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def __init__(
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self,
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task_id: str,
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username: str,
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workspace_id: str,
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message: str,
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conversation_id: Optional[str],
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model_key: Optional[str],
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thinking_mode: Optional[bool],
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run_mode: Optional[str],
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max_iterations: Optional[int],
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):
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self.task_id = task_id
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self.username = username
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self.workspace_id = workspace_id
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self.status = "pending"
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self.created_at = time.time()
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self.updated_at = self.created_at
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self.message = message
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self.conversation_id = conversation_id
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# 刷新恢复时前端会从事件流重建进行中的输出，1000 在长流式回复下会过早截断，
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# 导致“只恢复最后几个字符”。这里提高缓冲上限，优先保证重建完整性。
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self.events: deque[Dict[str, Any]] = deque(maxlen=20000)
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self.thread: Optional[threading.Thread] = None
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self.error: Optional[str] = None
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self.model_key = model_key
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self.thinking_mode = thinking_mode
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self.run_mode = run_mode
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self.max_iterations = max_iterations
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self.session_data: Dict[str, Any] = {}
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self.stop_requested: bool = False
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self.next_event_idx: int = 0
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class TaskManager:
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"""线程内存版任务管理器，后续可替换为 Redis/DB。"""
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def __init__(self):
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self._tasks: Dict[str, TaskRecord] = {}
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self._lock = threading.Lock()
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def cleanup_old_tasks(self, max_age_seconds: int = 3600) -> int:
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"""清理超过指定时间的已完成任务"""
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now = time.time()
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with self._lock:
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to_remove = []
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for task_id, rec in self._tasks.items():
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if rec.status in {"succeeded", "failed", "canceled"}:
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age = now - rec.updated_at
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if age > max_age_seconds:
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to_remove.append(task_id)
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for task_id in to_remove:
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del self._tasks[task_id]
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return len(to_remove)
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# ---- public APIs ----
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def create_chat_task(
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self,
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username: str,
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workspace_id: str,
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message: str,
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images: List[Any],
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conversation_id: Optional[str],
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videos: Optional[List[Any]] = None,
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model_key: Optional[str] = None,
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thinking_mode: Optional[bool] = None,
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run_mode: Optional[str] = None,
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max_iterations: Optional[int] = None,
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session_data: Optional[Dict[str, Any]] = None,
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) -> TaskRecord:
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if run_mode:
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normalized = str(run_mode).lower()
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if normalized not in {"fast", "thinking", "deep"}:
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raise ValueError("run_mode 只支持 fast/thinking/deep")
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run_mode = normalized
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# 单工作区互斥：禁止同一用户同一工作区并发任务
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existing = [t for t in self.list_tasks(username, workspace_id) if t.status in {"pending", "running"}]
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if existing:
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raise RuntimeError("已有运行中的任务，请稍后再试。")
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task_id = str(uuid.uuid4())
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record = TaskRecord(task_id, username, workspace_id, message, conversation_id, model_key, thinking_mode, run_mode, max_iterations)
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# 记录当前 session 快照，便于后台线程内使用
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if session_data is not None:
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snapshot = dict(session_data)
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snapshot.setdefault("workspace_id", workspace_id)
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try:
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snapshot.setdefault("host_mode", session.get("host_mode"))
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if snapshot.get("host_mode"):
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snapshot.setdefault("host_workspace_id", session.get("host_workspace_id") or workspace_id)
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except Exception:
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if snapshot.get("host_mode"):
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snapshot.setdefault("host_workspace_id", workspace_id)
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record.session_data = snapshot
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else:
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try:
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record.session_data = {
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"username": session.get("username"),
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"role": session.get("role"),
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"is_api_user": session.get("is_api_user"),
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"host_mode": session.get("host_mode"),
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"host_workspace_id": session.get("host_workspace_id") or workspace_id,
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"workspace_id": workspace_id,
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"run_mode": session.get("run_mode"),
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"thinking_mode": session.get("thinking_mode"),
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"model_key": session.get("model_key"),
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}
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except Exception:
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record.session_data = {}
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with self._lock:
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self._tasks[task_id] = record
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thread = threading.Thread(target=self._run_chat_task, args=(record, images, videos or []), daemon=True)
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record.thread = thread
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record.status = "running"
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record.updated_at = time.time()
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thread.start()
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return record
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def get_task(self, username: str, task_id: str) -> Optional[TaskRecord]:
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with self._lock:
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rec = self._tasks.get(task_id)
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if not rec or rec.username != username:
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return None
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return rec
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def list_tasks(self, username: str, workspace_id: Optional[str] = None) -> List[TaskRecord]:
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with self._lock:
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return [
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rec
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for rec in self._tasks.values()
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if rec.username == username and (workspace_id is None or rec.workspace_id == workspace_id)
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]
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def cancel_task(self, username: str, task_id: str) -> bool:
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rec = self.get_task(username, task_id)
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if not rec:
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return False
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rec.stop_requested = True
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# 标记停止标志；chat_flow 会检测 stop_flags
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entry = stop_flags.get(task_id)
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if not isinstance(entry, dict):
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entry = {'stop': False, 'task': None, 'terminal': None}
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stop_flags[task_id] = entry
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entry['stop'] = True
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# 注释掉直接取消任务，改为通过停止标志让任务内部处理
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# try:
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# if entry.get('task') and hasattr(entry['task'], "cancel"):
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# entry['task'].cancel()
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# except Exception:
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# pass
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with self._lock:
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rec.status = "cancel_requested"
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rec.updated_at = time.time()
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# 清空事件队列，防止新任务读取到旧事件
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rec.events.clear()
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debug_log(f"[Task] 任务 {task_id} 已取消，事件队列已清空")
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return True
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# ---- internal helpers ----
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def _append_event(self, rec: TaskRecord, event_type: str, data: Dict[str, Any]):
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with self._lock:
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idx = getattr(rec, "next_event_idx", None)
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if idx is None:
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idx = rec.events[-1]["idx"] + 1 if rec.events else 0
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rec.next_event_idx = idx + 1
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rec.events.append({
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"idx": idx,
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"type": event_type,
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"data": data,
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"ts": time.time(),
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})
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rec.updated_at = time.time()
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def _run_chat_task(self, rec: TaskRecord, images: List[Any], videos: List[Any]):
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username = rec.username
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workspace_id = rec.workspace_id
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terminal = None
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workspace = None
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stop_hint = False
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try:
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# 为后台线程构造最小请求上下文，填充 session
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from server.app import app as flask_app
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with flask_app.test_request_context():
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try:
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for k, v in (rec.session_data or {}).items():
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if v is not None:
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session[k] = v
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if session.get("host_mode"):
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session["workspace_id"] = workspace_id
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session["host_workspace_id"] = session.get("host_workspace_id") or workspace_id
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write_host_workspace_debug(
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"tasks.run_chat_task.apply_host_session",
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task_id=rec.task_id,
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workspace_id=workspace_id,
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host_workspace_id=session.get("host_workspace_id"),
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)
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except Exception:
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pass
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terminal, workspace = get_user_resources(username, workspace_id=workspace_id)
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if not terminal or not workspace:
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raise RuntimeError("系统未初始化")
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stop_hint = bool(stop_flags.get(rec.task_id, {}).get("stop"))
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def _apply_requested_model_mode():
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# API 传入的模型/模式配置
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if rec.model_key:
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try:
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terminal.set_model(rec.model_key)
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except Exception as exc:
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debug_log(f"[Task] 设置模型失败 {rec.model_key}: {exc}")
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if rec.run_mode:
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try:
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terminal.set_run_mode(rec.run_mode)
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except Exception as exc:
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debug_log(f"[Task] 设置运行模式失败 {rec.run_mode}: {exc}")
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elif rec.thinking_mode is not None:
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try:
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terminal.set_run_mode("thinking" if rec.thinking_mode else "fast")
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except Exception as exc:
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debug_log(f"[Task] 设置思考模式失败: {exc}")
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_apply_requested_model_mode()
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if rec.max_iterations:
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try:
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terminal.max_iterations_override = int(rec.max_iterations)
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except Exception:
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terminal.max_iterations_override = None
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try:
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debug_log(
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"[Task] effective terminal state "
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f"model_key={getattr(terminal, 'model_key', None)!r} "
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f"run_mode={getattr(terminal, 'run_mode', None)!r} "
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f"thinking_mode={getattr(terminal, 'thinking_mode', None)!r} "
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f"deep_mode={getattr(terminal, 'deep_thinking_mode', None)!r}"
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)
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except Exception:
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pass
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# 确保会话加载
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conversation_id = rec.conversation_id
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try:
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conversation_id, _ = ensure_conversation_loaded(terminal, conversation_id, workspace=workspace)
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rec.conversation_id = conversation_id
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except Exception as exc:
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raise RuntimeError(f"对话加载失败: {exc}") from exc
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# 对话加载会按会话元数据恢复历史模型/模式，这里再覆盖一次用户本次请求参数
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_apply_requested_model_mode()
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try:
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debug_log(
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"[Task] post-conversation effective state "
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f"model_key={getattr(terminal, 'model_key', None)!r} "
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f"run_mode={getattr(terminal, 'run_mode', None)!r} "
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f"thinking_mode={getattr(terminal, 'thinking_mode', None)!r} "
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f"deep_mode={getattr(terminal, 'deep_thinking_mode', None)!r}"
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)
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except Exception:
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pass
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# 仅对“后台通知触发的新任务”补发 user_message 事件到任务事件流。
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# 这样前端轮询能即时看到这条 user 消息，而不是刷新后才从历史中看到。
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try:
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if bool((rec.session_data or {}).get("auto_user_message_event")):
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extra_payload = (rec.session_data or {}).get("auto_user_message_payload") or {}
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if not isinstance(extra_payload, dict):
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extra_payload = {}
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payload = {
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"message": rec.message,
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"conversation_id": rec.conversation_id,
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"task_id": rec.task_id,
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}
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payload.update(extra_payload)
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self._append_event(rec, "user_message", payload)
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except Exception as exc:
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debug_log(f"[Task] 注入 user_message 事件失败: {exc}")
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def sender(event_type, data):
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# 记录事件
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self._append_event(rec, event_type, data)
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# 在线用户仍然收到实时推送（房间 user_{username}）
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try:
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from .extensions import socketio
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socketio.emit(event_type, data, room=f"user_{username}")
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except Exception:
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pass
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# 轮询模式需要把 context_manager 的回调切到当前任务 sender，
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# 否则 token_update 等事件只走 websocket，前端任务轮询拿不到实时更新。
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previous_ctx_callback = None
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try:
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if terminal and getattr(terminal, "context_manager", None):
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previous_ctx_callback = getattr(terminal.context_manager, "_web_terminal_callback", None)
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terminal.context_manager.set_web_terminal_callback(sender)
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except Exception as exc:
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debug_log(f"[Task] 设置上下文回调失败: {exc}")
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# 将 task_id 作为 client_sid，供 stop_flags 检测
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previous_auto_user_event = None
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try:
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previous_auto_user_event = getattr(terminal, "_auto_user_message_event", False)
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setattr(
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terminal,
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"_auto_user_message_event",
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bool((rec.session_data or {}).get("auto_user_message_event")),
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)
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except Exception:
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previous_auto_user_event = None
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try:
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run_chat_task_sync(
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terminal=terminal,
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message=rec.message,
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images=images,
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sender=sender,
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client_sid=rec.task_id,
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workspace=workspace,
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username=username,
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videos=videos,
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)
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finally:
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try:
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if previous_auto_user_event is not None:
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setattr(terminal, "_auto_user_message_event", previous_auto_user_event)
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if terminal and getattr(terminal, "context_manager", None):
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terminal.context_manager.set_web_terminal_callback(previous_ctx_callback)
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except Exception as exc:
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debug_log(f"[Task] 恢复上下文回调失败: {exc}")
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# 结束状态
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canceled_flag = rec.stop_requested or stop_hint or bool(stop_flags.get(rec.task_id, {}).get("stop"))
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with self._lock:
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rec.status = "canceled" if canceled_flag else "succeeded"
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rec.updated_at = time.time()
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except Exception as exc:
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debug_log(f"[Task] 后台任务失败: {exc}")
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self._append_event(rec, "error", {"message": str(exc)})
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with self._lock:
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rec.status = "failed"
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rec.error = str(exc)
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rec.updated_at = time.time()
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finally:
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# 清理 stop_flags
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stop_flags.pop(rec.task_id, None)
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# 清理一次性配置
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if terminal and hasattr(terminal, "max_iterations_override"):
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try:
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delattr(terminal, "max_iterations_override")
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except Exception:
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terminal.max_iterations_override = None
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task_manager = TaskManager()
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tasks_bp = Blueprint("tasks", __name__)
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def start_task_cleanup_scheduler():
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"""启动任务清理定时器"""
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def cleanup_loop():
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while True:
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try:
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count = task_manager.cleanup_old_tasks(3600)
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if count > 0:
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debug_log(f"[Task] 清理了 {count} 个旧任务")
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except Exception as e:
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debug_log(f"[Task] 清理任务失败: {e}")
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time.sleep(600) # 每 10 分钟
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thread = threading.Thread(target=cleanup_loop, daemon=True, name="TaskCleanup")
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thread.start()
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debug_log("[Task] 任务清理定时器已启动")
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# 启动清理定时器
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start_task_cleanup_scheduler()
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@tasks_bp.route("/api/tasks", methods=["GET"])
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@api_login_required
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def list_tasks_api():
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username = get_current_username()
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recs = task_manager.list_tasks(username)
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return jsonify({
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"success": True,
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"data": [
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{
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"task_id": r.task_id,
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"status": r.status,
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"created_at": r.created_at,
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"updated_at": r.updated_at,
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"message": r.message,
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"conversation_id": r.conversation_id,
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"error": r.error,
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} for r in sorted(recs, key=lambda x: x.created_at, reverse=True)
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]
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})
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@tasks_bp.route("/api/tasks", methods=["POST"])
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@api_login_required
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def create_task_api():
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username = get_current_username()
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workspace_id = session.get("workspace_id") or "default"
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payload = request.get_json() or {}
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message = (payload.get("message") or "").strip()
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images, videos = _normalize_media_payload(payload.get("images") or [], payload.get("videos") or [])
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conversation_id = payload.get("conversation_id")
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if not message and not images and not videos:
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return jsonify({"success": False, "error": "消息不能为空"}), 400
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model_key = payload.get("model_key")
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thinking_mode = payload.get("thinking_mode")
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run_mode = payload.get("run_mode")
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max_iterations = payload.get("max_iterations")
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try:
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debug_log(
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"[TaskAPI] create_task payload "
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f"model_key={model_key!r} run_mode={run_mode!r} thinking_mode={thinking_mode!r} "
|
||
f"conversation_id={conversation_id!r} images={len(images)} videos={len(videos)}"
|
||
)
|
||
except Exception:
|
||
pass
|
||
|
||
try:
|
||
rec = task_manager.create_chat_task(
|
||
username,
|
||
workspace_id,
|
||
message,
|
||
images,
|
||
conversation_id,
|
||
videos=videos,
|
||
model_key=model_key,
|
||
thinking_mode=thinking_mode,
|
||
run_mode=run_mode,
|
||
max_iterations=max_iterations,
|
||
)
|
||
except RuntimeError as exc:
|
||
return jsonify({"success": False, "error": str(exc)}), 409
|
||
return jsonify({
|
||
"success": True,
|
||
"data": {
|
||
"task_id": rec.task_id,
|
||
"status": rec.status,
|
||
"created_at": rec.created_at,
|
||
"conversation_id": rec.conversation_id,
|
||
}
|
||
}), 202
|
||
|
||
|
||
def _media_path(item: Any) -> str:
|
||
if isinstance(item, dict):
|
||
return str(item.get("path") or "")
|
||
return str(item or "")
|
||
|
||
|
||
def _is_video_item(item: Any) -> bool:
|
||
path = _media_path(item)
|
||
if not path:
|
||
return False
|
||
mime, _ = mimetypes.guess_type(path)
|
||
return bool(mime and mime.startswith("video/"))
|
||
|
||
|
||
def _is_image_item(item: Any) -> bool:
|
||
path = _media_path(item)
|
||
if not path:
|
||
return False
|
||
mime, _ = mimetypes.guess_type(path)
|
||
return bool(mime and mime.startswith("image/"))
|
||
|
||
|
||
def _normalize_media_payload(images: List[Any], videos: List[Any]) -> tuple[List[Any], List[Any]]:
|
||
"""纠偏媒体字段：把误传到 images 的视频项自动归入 videos。"""
|
||
fixed_images: List[Any] = []
|
||
fixed_videos: List[Any] = []
|
||
|
||
for item in images or []:
|
||
if _is_video_item(item):
|
||
fixed_videos.append(item)
|
||
else:
|
||
fixed_images.append(item)
|
||
|
||
for item in videos or []:
|
||
if _is_image_item(item):
|
||
fixed_images.append(item)
|
||
else:
|
||
fixed_videos.append(item)
|
||
|
||
return fixed_images, fixed_videos
|
||
|
||
|
||
@tasks_bp.route("/api/tasks/<task_id>", methods=["GET"])
|
||
@api_login_required
|
||
def get_task_api(task_id: str):
|
||
username = get_current_username()
|
||
rec = task_manager.get_task(username, task_id)
|
||
if not rec:
|
||
return jsonify({"success": False, "error": "任务不存在"}), 404
|
||
try:
|
||
offset = int(request.args.get("from", 0))
|
||
except Exception:
|
||
offset = 0
|
||
events = [e for e in rec.events if e["idx"] >= offset]
|
||
next_offset = events[-1]["idx"] + 1 if events else offset
|
||
return jsonify({
|
||
"success": True,
|
||
"data": {
|
||
"task_id": rec.task_id,
|
||
"status": rec.status,
|
||
"created_at": rec.created_at,
|
||
"updated_at": rec.updated_at,
|
||
"message": rec.message,
|
||
"conversation_id": rec.conversation_id,
|
||
"error": rec.error,
|
||
"events": events,
|
||
"next_offset": next_offset,
|
||
}
|
||
})
|
||
|
||
|
||
@tasks_bp.route("/api/tasks/<task_id>/cancel", methods=["POST"])
|
||
@api_login_required
|
||
def cancel_task_api(task_id: str):
|
||
username = get_current_username()
|
||
ok = task_manager.cancel_task(username, task_id)
|
||
if not ok:
|
||
return jsonify({"success": False, "error": "任务不存在"}), 404
|
||
return jsonify({"success": True})
|