从HttpContext提取自定义对象

时间:2019-05-22 09:07:49

标签: asp.net-core amazon-cognito lambda-authorizer

上下文

我正在重写从lambda上运行以在ECS容器上运行的ASP.NET Core应用程序。 Lambda支持开箱即用的Cognito授权者提出的声明,但Kestrel不支持。

API请求通过API网关传入,Cognito用户池授权者正在其中验证OAuth2令牌,并将声明从令牌扩展到httpContext。

最初,该应用在Lambda上运行,入口点继承了Amazon.Lambda.AspNetCoreServer.APIGatewayProxyFunction,提取了这些声明并将其添加到Request.HttpContext.User.Claims

红est当然不支持,AWS ASPNET Cognito Identity Provider似乎是用来执行授权者正在做的相同事情的。

解决方案?

所以我想到也许可以添加一些自定义代码来提取它。注入到lambda中的HTTP请求看起来像这样,所以我希望当它被代理到ECS时应该是相同的

{
"resource": "/{proxy+}",
"path": "/api/authtest",
"httpMethod": "GET",
"headers": {
    <...>
},
"queryStringParameters": null,
"pathParameters": {
    "proxy": "api/authtest"
},
"requestContext": {
    "resourceId": "8gffya",
    "authorizer": {
        "cognito:groups": "Admin",
        "phone_number_verified": "true",
        "cognito:username": "normj",
        "aud": "3mushfc8sgm8uoacvif5vhkt49",
        "event_id": "75760f58-f984-11e7-8d4a-2389efc50d68",
        "token_use": "id",
        "auth_time": "1515973296",
        "you_are_special": "true"
    }
<...>
}

有可能吗,如何将所有从requestContext.authorizerRequest.HttpContext.User.Claims的键/值对相加?

1 个答案:

答案 0 :(得分:0)

我为此找到了另一种解决方案。

我没有尝试修改HttpContext,而是将授权者输出映射到API Gateway集成中的请求标头。缺点是每个要求都必须进行硬编码,因为似乎不可能对其进行迭代。

地形示例

resource "aws_api_gateway_integration" "integration" {
  rest_api_id             = "${var.aws_apigateway-id}"
  resource_id             = "${aws_api_gateway_resource.proxyresource.id}"
  http_method             = "${aws_api_gateway_method.method.http_method}"
  integration_http_method = "ANY"
  type                    = "HTTP_PROXY"
  uri                     = "http://${aws_lb.nlb.dns_name}/{proxy}"

  connection_type = "VPC_LINK"
  connection_id   = "${aws_api_gateway_vpc_link.is_vpc_link.id}"

  request_parameters = {
    "integration.request.path.proxy"                     = "method.request.path.proxy"
    "integration.request.header.Authorizer-ResourceId"   = "context.authorizer.resourceId"
    "integration.request.header.Authorizer-ResourceName" = "context.authorizer.resourceName"
    "integration.request.header.Authorizer-Scopes"       = "context.authorizer.scopes"
    "integration.request.header.Authorizer-TokenType"    = "context.authorizer.tokenType"
  }
}