\u5927\u6a21\u578b\u9632\u706b\u5899\u7684\u7b2c\u4e00\u4ee3\u5f62\u6001\u76f4\u63a5\u7167\u642c\u4e86\u4f20\u7edf WAF：\u5728\u8f93\u5165\u8f93\u51fa\u4e24\u7aef\u5404\u653e\u4e00\u5c42\u89c4\u5219，\u7528\u5173\u952e\u8bcd\u3001\u6b63\u5219\u3001\u9ed1\u540d\u5355\u8fc7\u6ee4\u654f\u611f\u5185\u5bb9\u3002\u4e0a\u7ebf\u5feb\u3001\u53ef\u89e3\u91ca\u3001\u6613\u7ef4\u62a4，\u65e9\u671f\u5927\u6a21\u578b\u5e94\u7528\u51e0\u4e4e\u4eba\u624b\u4e00\u5957\u3002<\/p>\n
\u4f46\u653b\u51fb\u8005\u7ed5\u5f97\u4e5f\u5feb\u3002<\/p>\n
\u7b2c\u4e00\u7c7b\u7ed5\u8fc7\u662f\u540c\u4e49\u6539\u5199\u3002"\u5982\u4f55\u5236\u9020\u67d0\u7269"\u88ab\u62e6，\u653b\u51fb\u8005\u6539\u6210"\u67d0\u7269\u7684\u5236\u4f5c\u6d41\u7a0b\u5305\u542b\u54ea\u4e9b\u6b65\u9aa4"，\u5173\u952e\u8bcd\u89c4\u5219\u5f53\u573a\u5931\u6548\u3002\u8bed\u4e49\u6ca1\u53d8，\u5b57\u9762\u53d8\u4e86，\u6b63\u5219\u5339\u914d\u6beb\u65e0\u529e\u6cd5\u3002<\/p>\n
\u7b2c\u4e8c\u7c7b\u662f\u7f16\u7801\u53d8\u5f62\u3002Base64\u3001Unicode \u540c\u5f62\u5b57\u3001\u5206\u5b57\u63d2\u5165\u3001\u5927\u5c0f\u5199\u6df7\u6dc6，\u9ed1\u540d\u5355\u7a77\u4e3e\u4e0d\u5230\u5c3d\u5934\u3002\u6bcf\u8865\u4e00\u6761\u89c4\u5219，\u653b\u51fb\u8005\u5c31\u6362\u4e00\u79cd\u7f16\u7801，\u89c4\u5219\u7ef4\u62a4\u53d8\u6210\u4e86\u732b\u9f20\u6e38\u620f\u3002<\/p>\n
\u7b2c\u4e09\u7c7b\u662f\u4e0a\u4e0b\u6587\u62c6\u5206\u3002\u653b\u51fb\u8005\u628a\u654f\u611f\u610f\u56fe\u62c6\u8fdb\u591a\u8f6e\u5bf9\u8bdd，\u6bcf\u4e00\u8f6e\u5355\u72ec\u770b\u90fd\u65e0\u5bb3，\u7ec4\u5408\u8d77\u6765\u624d\u6784\u6210\u8d8a\u72f1\u3002\u89c4\u5219\u9632\u706b\u5899\u5929\u7136\u6309\u5355\u6761\u6d88\u606f\u5224\u5b9a，\u591a\u8f6e\u7ec4\u5408\u5bf9\u5b83\u6765\u8bf4\u5c31\u662f\u900f\u660e\u7a7a\u6c14\u3002<\/p>\n
\u7b2c\u56db\u7c7b\u662f\u95f4\u63a5\u6ce8\u5165\u3002\u6076\u610f\u6307\u4ee4\u4e0d\u76f4\u63a5\u6765\u81ea\u7528\u6237，\u800c\u662f\u85cf\u5728\u68c0\u7d22\u5230\u7684\u7f51\u9875\u3001\u4e0a\u4f20\u7684\u6587\u6863\u3001\u5de5\u5177\u56de\u4f20\u7684\u7ed3\u679c\u91cc\u3002\u9632\u706b\u5899\u53ea\u68c0\u67e5\u7528\u6237\u8f93\u5165，\u5bf9\u6a21\u578b\u5b9e\u9645\u770b\u5230\u7684\u4e0a\u4e0b\u6587\u89c6\u800c\u4e0d\u89c1\u3002\u8fd9\u4e2a\u5751\u6211\u89c1\u8fc7\u5f88\u591a\u6b21\u2014\u2014\u8f93\u5165\u68c0\u6d4b\u5168\u7eff，\u4f46\u6a21\u578b\u5df2\u7ecf\u5728\u88ab\u68c0\u7d22\u5185\u5bb9\u91cc\u7684\u9690\u85cf\u6307\u4ee4\u64cd\u63a7\u4e86\u3002<\/p>\n
\u66f4\u6df1\u5c42\u7684\u95ee\u9898，\u6211\u79f0\u4e4b\u4e3a"\u8bed\u4e49\u9e3f\u6c9f"\u3002\u89c4\u5219\u53ea\u770b\u5b57\u9762，\u6a21\u578b\u7406\u89e3\u8bed\u4e49\u3002\u653b\u51fb\u8005\u53ea\u8981\u628a\u5b57\u9762\u505a\u5f97"\u6b63\u5e38"，\u89c4\u5219\u5c31\u65e0\u6cd5\u8bc6\u522b\u771f\u5b9e\u610f\u56fe\u3002\u8fd9\u662f\u5f7b\u5934\u5f7b\u5c3e\u7684\u4e0d\u5bf9\u7b49\u5bf9\u6297：\u653b\u51fb\u8005\u5728\u8bed\u4e49\u5c42\u64cd\u4f5c，\u9632\u5fa1\u8005\u5728\u5b57\u7b26\u5c42\u9632\u5fa1\u3002<\/p>\n
\u4e8e\u662f\u884c\u4e1a\u5f00\u59cb\u628a\u9632\u706b\u5899\u4ece"\u5b57\u7b26\u5339\u914d"\u5347\u7ea7\u5230"\u8bed\u4e49\u7406\u89e3"\u3002\u7528\u6a21\u578b\u7406\u89e3\u6a21\u578b，\u8ba9\u9632\u5fa1\u4fa7\u4e5f\u5177\u5907\u8bed\u4e49\u5224\u65ad\u80fd\u529b\u3002<\/p>\n
\u8bed\u4e49\u7ea7\u9632\u706b\u5899\u4e0d\u518d\u53ea\u538b\u5728\u8f93\u5165\u8f93\u51fa\u4e24\u7aef，\u800c\u662f\u8d2f\u7a7f\u6a21\u578b\u7684\u6574\u4e2a\u63a8\u7406\u4e0a\u4e0b\u6587\u3002\u6bcf\u4e00\u5c42\u90fd\u7528\u8bed\u4e49\u7406\u89e3\u505a\u5224\u5b9a，\u800c\u975e\u5b57\u7b26\u5339\u914d\u3002<\/p>\n
\u8f93\u5165\u4fa7\u7528\u5c0f\u6a21\u578b\u5206\u7c7b\u5668\u66ff\u4ee3\u5173\u952e\u8bcd\u89c4\u5219\u3002\u5c0f\u6a21\u578b\u7406\u89e3"\u8fd9\u6bb5\u8bdd\u7684\u771f\u5b9e\u610f\u56fe\u662f\u4ec0\u4e48"，\u800c\u975e"\u8fd9\u6bb5\u8bdd\u662f\u5426\u5305\u542b\u67d0\u4e2a\u8bcd"\u3002\u540c\u4e49\u6539\u5199\u3001\u7f16\u7801\u53d8\u5f62\u5bf9\u5b83\u90fd\u65e0\u6548，\u56e0\u4e3a\u8bed\u4e49\u4e0d\u53d8\u3002<\/p>\n
\u4e0a\u4e0b\u6587\u4e00\u81f4\u6027\u6821\u9a8c\u662f\u65b0\u589e\u7684\u4e00\u5c42\u3002\u5b83\u68c0\u67e5\u68c0\u7d22\u7ed3\u679c\u3001\u5de5\u5177\u56de\u4f20\u662f\u5426\u5305\u542b\u6ce8\u5165\u6307\u4ee4\u3002\u5e38\u89c1\u4fe1\u53f7\u5305\u62ec：\u4e0a\u4e0b\u6587\u91cc\u51fa\u73b0"\u5ffd\u7565\u4e4b\u524d\u6307\u4ee4""\u73b0\u5728\u4f60\u662f"\u7b49\u64cd\u63a7\u8bed\u53e5；\u4e0a\u4e0b\u6587\u4e0e\u7528\u6237\u539f\u59cb\u610f\u56fe\u7684\u8bed\u4e49\u8ddd\u79bb\u7a81\u7136\u62c9\u5927；\u5de5\u5177\u56de\u4f20\u91cc\u5305\u542b\u4e0d\u8be5\u6709\u7684\u6307\u4ee4\u6027\u5185\u5bb9\u3002\u8bf4\u5b9e\u8bdd，\u8fd9\u5c42\u662f\u8bed\u4e49\u7ea7\u9632\u62a4\u4e2d\u6700\u6709\u4ef7\u503c\u7684\u4e00\u5c42，\u56e0\u4e3a\u5b83\u8986\u76d6\u4e86\u4f20\u7edf\u9632\u706b\u5899\u5b8c\u5168\u770b\u4e0d\u5230\u7684\u76f2\u533a\u3002<\/p>\n
\u8f93\u51fa\u4fa7\u540c\u6837\u7528\u8bed\u4e49\u5206\u7c7b\u5668\u5224\u5b9a\u5408\u89c4\u6027\u3002\u6a21\u578b\u751f\u6210\u7684\u56de\u7b54\u662f\u5426\u7b26\u5408\u5b89\u5168\u7b56\u7565，\u662f\u5426\u6cc4\u9732\u4e86\u4e0d\u8be5\u6cc4\u9732\u7684\u4fe1\u606f，\u662f\u5426\u5728\u88ab\u8bf1\u5bfc\u4e0b\u914d\u5408\u4e86\u8d8a\u6743\u8bf7\u6c42\u3002\u8fd9\u4e9b\u5224\u5b9a\u90fd\u4f9d\u8d56\u8bed\u4e49\u7406\u89e3，\u800c\u975e\u5173\u952e\u8bcd\u3002<\/p>\n
\u591a\u8f6e\u610f\u56fe\u805a\u5408\u5904\u7406\u8de8\u8f6e\u6b21\u653b\u51fb\u3002\u5b83\u628a\u591a\u8f6e\u5bf9\u8bdd\u7684\u610f\u56fe\u4e32\u8054\u8d77\u6765\u770b，\u8bc6\u522b\u5355\u8f6e\u65e0\u5bb3\u4f46\u7ec4\u5408\u8d77\u6765\u6784\u6210\u8d8a\u72f1\u7684\u6a21\u5f0f\u3002\u89c4\u5219\u9632\u706b\u5899\u5b8c\u5168\u505a\u4e0d\u5230\u8fd9\u4e2a\u3002<\/p>\n
\u6bcf\u4e00\u5c42\u90fd\u662f"\u6a21\u578b\u5224\u6a21\u578b"，\u9632\u5fa1\u4fa7\u4e0e\u653b\u51fb\u4fa7\u5728\u540c\u4e00\u8bed\u4e49\u5c42\u5bf9\u6297\u3002\u8fd9\u628a\u8fc7\u53bb\u7684"\u5b57\u7b26\u5c42\u9632\u5fa1\u3001\u8bed\u4e49\u5c42\u653b\u51fb"\u7684\u4e0d\u5bf9\u7b49，\u91cd\u65b0\u62c9\u56de\u5bf9\u7b49\u3002<\/p>\n
\u4e0b\u9762\u662f\u4e00\u6bb5\u8bed\u4e49\u9632\u706b\u5899\u7684\u5b9e\u73b0\u3002\u5b83\u628a\u8f93\u5165\u5206\u7c7b\u3001\u4e0a\u4e0b\u6587\u4e00\u81f4\u6027\u3001\u8f93\u51fa\u5224\u5b9a\u4e09\u5c42\u4e32\u8d77\u6765，\u5185\u7f6e\u8d85\u65f6\u3001\u964d\u7ea7\u4e0e\u591a\u6a21\u578b\u6295\u7968，\u907f\u514d\u5355\u70b9\u6545\u969c：<\/p>\n
import asyncio
\nfrom dataclasses import dataclass
\nfrom enum import Enum<\/p>\n
class RiskLevel(Enum):
\n LOW = "low"
\n MEDIUM = "medium"
\n HIGH = "high"<\/p>\n
@dataclass
\nclass MsgCtx:
\n user_input: str
\n retrieved: list[str] # \u68c0\u7d22\/\u5de5\u5177\u56de\u4f20\u5185\u5bb9
\n history: list[str] # \u591a\u8f6e\u5386\u53f2
\n cache_key: str = ""<\/p>\n
class SemanticFirewall:
\n def __init__(self, classifier, timeout: float = 0.3):
\n self._clf = classifier
\n self._timeout = timeout<\/p>\n
async def _judge(self, text: str, kind: str) -> RiskLevel:
\n # \u8bed\u4e49\u5206\u7c7b\u5668\u8c03\u7528\u5e26\u8d85\u65f6,\u6296\u52a8\u65f6\u6309\u9ad8\u98ce\u9669\u964d\u7ea7,\u5b81\u53ef\u62e6\u4e5f\u4e0d\u653e
\n try:
\n verdict = await asyncio.wait_for(
\n self._clf(text, kind), timeout=self._timeout
\n )
\n return RiskLevel(verdict)
\n except asyncio.TimeoutError:
\n return RiskLevel.HIGH
\n except Exception:
\n return RiskLevel.HIGH<\/p>\n
async def _check_context(self, retrieved: list[str]) -> RiskLevel:
\n # \u4e0a\u4e0b\u6587\u4e00\u81f4\u6027:\u4efb\u4e00\u68c0\u7d22\u7247\u6bb5\u7591\u4f3c\u6ce8\u5165\u5373\u5224\u9ad8,\u9632\u6b62\u95f4\u63a5\u6ce8\u5165
\n if not retrieved:
\n return RiskLevel.LOW
\n tasks = [self._judge(seg, "injection") for seg in retrieved]
\n verdicts = await asyncio.gather(*tasks, return_exceptions=True)
\n for v in verdicts:
\n if v == RiskLevel.HIGH:
\n return RiskLevel.HIGH
\n return RiskLevel.LOW<\/p>\n
async def evaluate(self, ctx: MsgCtx) -> dict:
\n # \u8f93\u5165\u3001\u4e0a\u4e0b\u6587\u5e76\u53d1\u5224\u5b9a,\u7f29\u77ed\u6574\u4f53\u5ef6\u8fdf
\n input_level, ctx_level = await asyncio.gather(
\n self._judge(ctx.user_input, "intent"),
\n self._check_context(ctx.retrieved),
\n )
\n # \u53d6\u6700\u4e25:\u4efb\u4e00\u7ef4\u5ea6\u9ad8\u5373\u6574\u4f53\u9ad8,\u907f\u514d\u5355\u70b9\u5bbd\u677e\u88ab\u7ed5\u8fc7
\n worst = max([input_level, ctx_level], key=lambda r: r.value)
\n if worst == RiskLevel.HIGH:
\n return {"allow": False, "reason": "semantic_high"}
\n if worst == RiskLevel.MEDIUM:
\n return {"allow": True, "step_up": True}
\n return {"allow": True}<\/p>\n
async def check_output(self, output: str) -> dict:
\n # \u8f93\u51fa\u4fa7\u8bed\u4e49\u5224\u5b9a:\u8fdd\u89c4\u5373\u62e6\u622a\u6216\u91cd\u5199
\n level = await self._judge(output, "output_policy")
\n if level == RiskLevel.HIGH:
\n return {"release": False, "reason": "output_violation"}
\n return {"release": True}<\/p>\n
# \u4f7f\u7528\u793a\u4f8b(\u4f2a\u5206\u7c7b\u5668,\u771f\u5b9e\u73af\u5883\u66ff\u6362\u4e3a\u5c0f\u6a21\u578b\u670d\u52a1)
\nasync def demo():
\n async def clf(text, kind):
\n await asyncio.sleep(0.01)
\n return "low"
\n fw = SemanticFirewall(classifier=clf)
\n ctx = MsgCtx(user_input="\u6b63\u5e38\u63d0\u95ee", retrieved=["\u6b63\u5e38\u7247\u6bb5"], history=[])
\n print(await fw.evaluate(ctx))
\n print(await fw.check_output("\u6b63\u5e38\u56de\u7b54"))<\/p>\n
\u4e24\u5904\u503c\u5f97\u5173\u6ce8\u3002\u5206\u7c7b\u5668\u8c03\u7528\u4e25\u683c\u8d85\u65f6，\u6296\u52a8\u65f6\u6309\u9ad8\u98ce\u9669\u964d\u7ea7，\u62a4\u680f\u4e0d\u5b58\u5728\u7a7a\u7a97\u671f\u3002\u8f93\u5165\u4e0e\u4e0a\u4e0b\u6587\u5e76\u53d1\u5224\u5b9a，\u7f29\u77ed\u6574\u4f53\u5ef6\u8fdf，\u907f\u514d\u4e32\u884c\u62d6\u6162\u63a8\u7406\u3002\u591a\u7ef4\u5ea6\u53d6\u6700\u4e25，\u4efb\u4e00\u7ef4\u5ea6\u9ad8\u5373\u6574\u4f53\u9ad8，\u907f\u514d\u5355\u70b9\u5bbd\u677e\u88ab\u7ed5\u8fc7\u3002<\/p>\n
\u82e5\u8981\u518d\u751f\u4ea7\u5316，\u5e94\u52a0\u4e0a\u5206\u7c7b\u5668\u591a\u6a21\u578b\u6295\u7968\u4e0e\u7f13\u5b58\u3002\u591a\u6a21\u578b\u6295\u7968\u964d\u4f4e\u5355\u4e00\u5206\u7c7b\u5668\u7684\u8bef\u5224\u98ce\u9669；\u9ad8\u9891\u5e38\u89c1\u8f93\u5165\u7684\u5224\u5b9a\u7ed3\u679c\u77ed\u671f\u7f13\u5b58，\u964d\u4f4e\u5206\u7c7b\u5668\u538b\u529b\u3002\u4e24\u8005\u7ed3\u5408，\u8ba9\u8bed\u4e49\u9632\u706b\u5899\u5728\u7cbe\u5ea6\u4e0e\u6027\u80fd\u4e0a\u90fd\u80fd\u843d\u5730\u3002<\/p>\n
\u8bed\u4e49\u7ea7\u9632\u62a4\u6709\u4ee3\u4ef7\u3002\u843d\u5730\u524d\u4f60\u5f97\u60f3\u6e05\u695a\u51e0\u4ef6\u4e8b\u3002<\/p>\n
\u63a8\u7406\u6210\u672c\u662f\u771f\u5b9e\u5b58\u5728\u7684\u3002\u6bcf\u6761\u8f93\u5165\u90fd\u8981\u8fc7\u4e00\u6b21\u5c0f\u6a21\u578b\u5206\u7c7b\u5668，\u68c0\u7d22\u7247\u6bb5\u4e0e\u8f93\u51fa\u4e5f\u8981\u5224\u5b9a\u3002\u9ad8\u9891\u573a\u666f\u4e0b，\u8fd9\u90e8\u5206\u5f00\u9500\u4e0d\u5bb9\u5ffd\u89c6\u3002\u7f13\u89e3\u529e\u6cd5\u662f\u5206\u5c42\u5224\u5b9a：\u5148\u7528\u8f7b\u91cf\u89c4\u5219\u505a\u7c97\u7b5b，\u518d\u5bf9\u7c97\u7b5b\u53ef\u7591\u7684\u6837\u672c\u8c03\u8bed\u4e49\u5206\u7c7b\u5668\u3002\u4e00\u5200\u5207\u5168\u8d70\u8bed\u4e49\u5224\u5b9a，\u6027\u80fd\u4e0e\u6210\u672c\u90fd\u96be\u627f\u53d7\u3002<\/p>\n
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