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# -*- coding: utf-8 -*-
"""
会话处理模块
负责用户会话的创建、验证、管理和清理
"""
import secrets
import time
from datetime import datetime, timedelta
from typing import Dict, List, Optional, Any, Tuple
from dataclasses import dataclass
import threading
from loguru import logger
@dataclass
class SessionData:
"""会话数据类"""
session_id: str
user_id: str
created_at: datetime
last_activity: datetime
custom_agents: Dict[str, Any] # 自定义智能体
discussion_data: Dict[str, Any] # 当前讨论数据
user_preferences: Dict[str, Any] # 用户偏好
class SessionHandler:
"""
会话处理器类
管理用户会话的生命周期
"""
def __init__(self, session_timeout: int = 3600, cleanup_interval: int = 300):
"""
初始化会话处理器
Args:
session_timeout: 会话超时时间（秒）
cleanup_interval: 清理间隔（秒）
"""
self.session_timeout = session_timeout
self.active_sessions: Dict[str, SessionData] = {}
self.session_lock = threading.Lock()
# 启动后台清理线程
self.cleanup_thread = threading.Thread(target=self._cleanup_worker, daemon=True)
self.cleanup_interval = cleanup_interval
self._stop_cleanup = False
self.cleanup_thread.start()
logger.info(f"会话处理器初始化完成，超时时间: {session_timeout}秒")
def _generate_session_id(self) -> str:
"""
生成唯一的会话ID
Returns:
str: 会话ID
"""
return secrets.token_urlsafe(32)
def create_session(self, user_id: str, user_preferences: Dict = None) -> str:
"""
创建新会话
Args:
user_id: 用户ID
user_preferences: 用户偏好设置
Returns:
str: 会话ID
"""
session_id = self._generate_session_id()
now = datetime.now()
session_data = SessionData(
session_id=session_id,
user_id=user_id,
created_at=now,
last_activity=now,
custom_agents={},
discussion_data={},
user_preferences=user_preferences or {}
)
with self.session_lock:
self.active_sessions[session_id] = session_data
logger.info(f"创建新会话: {session_id} for user: {user_id}")
return session_id
def validate_session(self, session_id: str) -> Tuple[bool, Optional[SessionData]]:
"""
验证会话有效性
Args:
session_id: 会话ID
Returns:
Tuple[是否有效, 会话数据]
"""
with self.session_lock:
if session_id not in self.active_sessions:
return False, None
session_data = self.active_sessions[session_id]
now = datetime.now()
# 检查是否超时
time_since_activity = (now - session_data.last_activity).total_seconds()
if time_since_activity > self.session_timeout:
logger.info(f"会话超时: {session_id}")
del self.active_sessions[session_id]
return False, None
# 更新最后活动时间
session_data.last_activity = now
return True, session_data
def update_session_activity(self, session_id: str) -> bool:
"""
更新会话活动时间
Args:
session_id: 会话ID
Returns:
bool: 是否更新成功
"""
with self.session_lock:
if session_id in self.active_sessions:
self.active_sessions[session_id].last_activity = datetime.now()
return True
return False
def get_session_data(self, session_id: str) -> Optional[SessionData]:
"""
获取会话数据
Args:
session_id: 会话ID
Returns:
Optional[SessionData]: 会话数据
"""
with self.session_lock:
return self.active_sessions.get(session_id)
def add_custom_agent(self, session_id: str, agent_name: str, agent_config: Dict) -> bool:
"""
添加自定义智能体到会话
Args:
session_id: 会话ID
agent_name: 智能体名称
agent_config: 智能体配置
Returns:
bool: 是否添加成功
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return False
with self.session_lock:
session_data.custom_agents[agent_name] = {
'config': agent_config,
'created_at': datetime.now().isoformat(),
'usage_count': 0
}
logger.debug(f"会话 {session_id} 添加自定义智能体: {agent_name}")
return True
def get_custom_agents(self, session_id: str) -> Dict[str, Any]:
"""
获取会话的自定义智能体
Args:
session_id: 会话ID
Returns:
Dict[str, Any]: 自定义智能体字典
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return {}
return session_data.custom_agents
def remove_custom_agent(self, session_id: str, agent_name: str) -> bool:
"""
移除自定义智能体
Args:
session_id: 会话ID
agent_name: 智能体名称
Returns:
bool: 是否移除成功
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return False
with self.session_lock:
if agent_name in session_data.custom_agents:
del session_data.custom_agents[agent_name]
logger.debug(f"会话 {session_id} 移除自定义智能体: {agent_name}")
return True
return False
def update_discussion_data(self, session_id: str, discussion_data: Dict) -> bool:
"""
更新会话的讨论数据
Args:
session_id: 会话ID
discussion_data: 讨论数据
Returns:
bool: 是否更新成功
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return False
with self.session_lock:
session_data.discussion_data.update(discussion_data)
return True
def get_discussion_data(self, session_id: str) -> Dict[str, Any]:
"""
获取会话的讨论数据
Args:
session_id: 会话ID
Returns:
Dict[str, Any]: 讨论数据
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return {}
return session_data.discussion_data
def clear_discussion_data(self, session_id: str) -> bool:
"""
清空讨论数据
Args:
session_id: 会话ID
Returns:
bool: 是否清空成功
"""
is_valid, session_data = self.validate_session(session_id)
if not is_valid:
return False
with self.session_lock:
session_data.discussion_data = {}
return True
def destroy_session(self, session_id: str) -> bool:
"""
销毁会话
Args:
session_id: 会话ID
Returns:
bool: 是否销毁成功
"""
with self.session_lock:
if session_id in self.active_sessions:
user_id = self.active_sessions[session_id].user_id
del self.active_sessions[session_id]
logger.info(f"销毁会话: {session_id} for user: {user_id}")
return True
return False
def get_user_sessions(self, user_id: str) -> List[str]:
"""
获取用户的所有活跃会话
Args:
user_id: 用户ID
Returns:
List[str]: 会话ID列表
"""
sessions = []
with self.session_lock:
for session_id, session_data in self.active_sessions.items():
if session_data.user_id == user_id:
sessions.append(session_id)
return sessions
def get_session_stats(self) -> Dict[str, Any]:
"""
获取会话统计信息
Returns:
Dict[str, Any]: 统计信息
"""
with self.session_lock:
total_sessions = len(self.active_sessions)
# 按用户分组统计
user_session_count = {}
for session_data in self.active_sessions.values():
user_id = session_data.user_id
user_session_count[user_id] = user_session_count.get(user_id, 0) + 1
# 计算平均会话时长
now = datetime.now()
total_duration = 0
for session_data in self.active_sessions.values():
duration = (now - session_data.created_at).total_seconds()
total_duration += duration
avg_duration = total_duration / total_sessions if total_sessions > 0 else 0
return {
'total_sessions': total_sessions,
'unique_users': len(user_session_count),
'average_duration_seconds': avg_duration,
'sessions_per_user': user_session_count
}
def _cleanup_expired_sessions(self):
"""清理过期会话"""
now = datetime.now()
expired_sessions = []
with self.session_lock:
for session_id, session_data in self.active_sessions.items():
time_since_activity = (now - session_data.last_activity).total_seconds()
if time_since_activity > self.session_timeout:
expired_sessions.append(session_id)
# 删除过期会话
for session_id in expired_sessions:
user_id = self.active_sessions[session_id].user_id
del self.active_sessions[session_id]
logger.info(f"清理过期会话: {session_id} for user: {user_id}")
if expired_sessions:
logger.info(f"清理了 {len(expired_sessions)} 个过期会话")
def _cleanup_worker(self):
"""后台清理工作线程"""
while not self._stop_cleanup:
try:
self._cleanup_expired_sessions()
time.sleep(self.cleanup_interval)
except Exception as e:
logger.error(f"会话清理工作线程错误: {e}")
time.sleep(60) # |