74 lines
2.5 KiB
Python
74 lines
2.5 KiB
Python
"""开放平台认证与授权：
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APIKeyAuthentication 支持第三方系统通过 Header:
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X-API-Key: dh_xxxx.yyyy
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或
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Authorization: Api-Key dh_xxxx.yyyy
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安全访问开放接口。
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"""
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from rest_framework import authentication, exceptions, permissions
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from django.utils import timezone
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from asgiref.sync import sync_to_async
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from .models import APIKey
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class APIKeyAuthentication(authentication.BaseAuthentication):
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"""基于 API Key 的第三方系统鉴权类。"""
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def authenticate(self, request):
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auth_header = request.META.get("HTTP_AUTHORIZATION", "")
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api_key_header = request.META.get("HTTP_X_API_KEY", "")
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raw_key = None
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if api_key_header:
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raw_key = api_key_header.strip()
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elif auth_header.startswith("Api-Key "):
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raw_key = auth_header[8:].strip()
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if not raw_key:
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return None
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if "." not in raw_key:
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raise exceptions.AuthenticationFailed("API Key 格式无效（必须包含前缀）")
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prefix = raw_key.split(".")[0]
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key_obj = APIKey.objects.filter(prefix=prefix, is_active=True).select_related("tenant").first()
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if not key_obj:
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raise exceptions.AuthenticationFailed("API Key 不存在或已被禁用")
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if key_obj.expires_at and key_obj.expires_at < timezone.now():
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raise exceptions.AuthenticationFailed("API Key 已过期")
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if not key_obj.verify_key(raw_key):
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raise exceptions.AuthenticationFailed("API Key 签名无效")
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# 记录调用时间并绑定 tenant
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key_obj.last_used_at = timezone.now()
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key_obj.save(update_fields=["last_used_at"])
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# 注入租户上下文
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request.tenant_obj = key_obj.tenant
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if hasattr(request, "_request"):
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request._request.tenant_obj = key_obj.tenant
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# 绑定系统用户
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user = key_obj.created_by
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if not user:
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from django.contrib.auth import get_user_model
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user = get_user_model().objects.filter(is_superuser=True).first()
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return (user, key_obj)
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def require_scope(scope_name: str):
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"""用于视图权限检查的 Scope 装饰辅助类。"""
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class ScopePermission(permissions.BasePermission):
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def has_permission(self, request, view):
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api_key = getattr(request, "auth", None)
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if not isinstance(api_key, APIKey):
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return False # 未携带有效 APIKey 则拒绝访问
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return scope_name in api_key.scopes or "*" in api_key.scopes
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return ScopePermission
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