初步增加 web 界面

web/backend/security.py

@@ -0,0 +1,38 @@
+"""安全模块：密码哈希 + JWT"""
+
+from datetime import datetime, timedelta, timezone
+from typing import Optional
+import bcrypt
+from jose import jwt, JWTError
+
+SECRET_KEY = "douyu-web-secret-change-in-production"
+ALGORITHM = "HS256"
+ACCESS_TOKEN_EXPIRE_HOURS = 24
+
+
+def hash_password(password: str) -> str:
+    pwd_bytes = password.encode("utf-8")
+    # bcrypt 限制72字节，截断
+    pwd_bytes = pwd_bytes[:72]
+    return bcrypt.hashpw(pwd_bytes, bcrypt.gensalt()).decode("utf-8")
+
+
+def verify_password(plain: str, hashed: str) -> bool:
+    try:
+        return bcrypt.checkpw(plain.encode("utf-8")[:72], hashed.encode("utf-8"))
+    except Exception:
+        return False
+
+
+def create_access_token(data: dict, expires_hours: int = ACCESS_TOKEN_EXPIRE_HOURS) -> str:
+    to_encode = data.copy()
+    expire = datetime.now(timezone.utc) + timedelta(hours=expires_hours)
+    to_encode.update({"exp": expire})
+    return jwt.encode(to_encode, SECRET_KEY, algorithm=ALGORITHM)
+
+
+def decode_access_token(token: str) -> Optional[dict]:
+    try:
+        return jwt.decode(token, SECRET_KEY, algorithms=[ALGORITHM])
+    except JWTError:
+        return None