53c78e8e3c
主要更新: - 新增 security/ 安全模块 (风险评估、威胁检测、蜜罐等) - Dockerfile 添加 curl 以支持 Docker 健康检查 - 前端页面更新 (管理后台、用户端) - 数据库迁移和 schema 更新 - 新增 kdocs 上传服务 - 添加安全相关测试用例 Co-Authored-By: Claude <noreply@anthropic.com>
132 lines
4.2 KiB
Python
132 lines
4.2 KiB
Python
#!/usr/bin/env python3
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# -*- coding: utf-8 -*-
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from __future__ import annotations
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import random
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import time
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from dataclasses import dataclass
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from enum import Enum
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from typing import Any, Optional
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from app_logger import get_logger
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class ResponseAction(Enum):
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ALLOW = "allow" # 正常放行
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ENHANCE_CAPTCHA = "enhance_captcha" # 增强验证码
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DELAY = "delay" # 静默延迟
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HONEYPOT = "honeypot" # 蜜罐响应
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BLOCK = "block" # 直接拒绝
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@dataclass
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class ResponseStrategy:
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action: ResponseAction
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delay_seconds: float = 0
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captcha_level: int = 1 # 1=普通4位, 2=6位, 3=滑块
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message: str | None = None
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class ResponseHandler:
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"""响应策略处理器"""
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def __init__(self, *, rng: Optional[random.Random] = None) -> None:
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self._rng = rng or random.SystemRandom()
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self._logger = get_logger("app")
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def get_strategy(self, risk_score: int, is_banned: bool = False) -> ResponseStrategy:
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"""
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根据风险分获取响应策略
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0-20分: ALLOW, 无延迟, 普通验证码
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21-40分: ALLOW, 无延迟, 6位验证码
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41-60分: DELAY, 1-2秒延迟
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61-80分: DELAY, 2-5秒延迟
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81-100分: HONEYPOT, 3-8秒延迟
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已封禁: BLOCK
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"""
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score = self._normalize_risk_score(risk_score)
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if is_banned:
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strategy = ResponseStrategy(action=ResponseAction.BLOCK, message="访问被拒绝")
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self._logger.warning("响应策略: BLOCK (banned=%s, risk_score=%s)", is_banned, score)
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return strategy
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if score <= 20:
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strategy = ResponseStrategy(action=ResponseAction.ALLOW, delay_seconds=0, captcha_level=1)
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elif score <= 40:
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strategy = ResponseStrategy(action=ResponseAction.ALLOW, delay_seconds=0, captcha_level=2)
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elif score <= 60:
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strategy = ResponseStrategy(action=ResponseAction.DELAY, delay_seconds=float(self._rng.uniform(1.0, 2.0)))
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elif score <= 80:
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strategy = ResponseStrategy(action=ResponseAction.DELAY, delay_seconds=float(self._rng.uniform(2.0, 5.0)))
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else:
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strategy = ResponseStrategy(action=ResponseAction.HONEYPOT, delay_seconds=float(self._rng.uniform(3.0, 8.0)))
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strategy.captcha_level = self._normalize_captcha_level(strategy.captcha_level)
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self._logger.info(
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"响应策略: action=%s risk_score=%s delay=%.3f captcha_level=%s",
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strategy.action.value,
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score,
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float(strategy.delay_seconds or 0),
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int(strategy.captcha_level),
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)
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return strategy
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def apply_delay(self, strategy: ResponseStrategy):
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"""应用延迟（使用time.sleep）"""
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if strategy is None:
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return
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delay = 0.0
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try:
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delay = float(getattr(strategy, "delay_seconds", 0) or 0)
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except Exception:
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delay = 0.0
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if delay <= 0:
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return
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self._logger.debug("应用延迟: action=%s delay=%.3f", getattr(strategy.action, "value", strategy.action), delay)
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time.sleep(delay)
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def get_captcha_requirement(self, strategy: ResponseStrategy) -> dict:
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"""返回验证码要求 {"required": True, "level": 2}"""
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level = 1
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try:
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level = int(getattr(strategy, "captcha_level", 1) or 1)
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except Exception:
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level = 1
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level = self._normalize_captcha_level(level)
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required = True
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try:
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required = getattr(strategy, "action", None) != ResponseAction.BLOCK
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except Exception:
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required = True
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payload = {"required": bool(required), "level": level}
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self._logger.debug("验证码要求: %s", payload)
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return payload
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# ==================== Internal ====================
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def _normalize_risk_score(self, risk_score: Any) -> int:
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try:
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score = int(risk_score)
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except Exception:
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score = 0
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return max(0, min(100, score))
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def _normalize_captcha_level(self, level: Any) -> int:
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try:
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i = int(level)
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except Exception:
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i = 1
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if i <= 1:
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return 1
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if i == 2:
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return 2
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return 3
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