API 网关返回 401 并且不调用自定义授权方

Question

我已经为 API 网关实现了一个自定义的“REQUEST”类型授权器，它验证在“Authorization”标头中传递的 JWT 令牌。我已经独立测试了 lambda，它按预期工作。我还将授权人附加到我的路由中，我可以在 AWS 控制台中对其进行测试 - 再次，一切似乎都正常（见图）：

successful invoke via console

但是，当我尝试使用 Authorization 标头中的令牌调用端点时，我总是收到 UNAUTHORIZED 响应：

{
  "errors": [
    {
      "category": "ClientError",
      "code": "UNAUTHORIZED",
      "detail": "Unauthorized",
      "method": "GET",
      "path": "/cases",
      "requestId": "004eb254-a926-45ad-96a5-ce3527621c81",
      "retryable": false
    }
  ]
}

根据我收集到的信息，API 网关从不调用我的授权器，因为我在其 cloudwatch 中看不到任何日志事件。我能够启用我的 API 网关的 cloudwatch 日志记录，我看到的唯一日志信息如下：

------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|   timestamp   |                                                                                                                             message                                                                                                                              |
|---------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1578275720543 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Extended Request Id: F2v9WFfiIAMF-9w=                                                                                                                                                                                     |
| 1578275720543 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Unauthorized request: dac0d4f6-1380-4049-bcee-bf776ca78e5c                                                                                                                                                                |
| 1578275720543 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Extended Request Id: F2v9WFfiIAMF-9w=                                                                                                                                                                                     |
| 1578275720544 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Gateway response type: UNAUTHORIZED with status code: 401                                                                                                                                                                 |
| 1578275720544 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Gateway response body: {"errors": [{"category": "ClientError","code": "UNAUTHORIZED","detail": "Unauthorized","method": "GET","path": "/cases","requestId": "dac0d4f6-1380-4049-bcee-bf776ca78e5c","retryable": false }]} |
| 1578275720544 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Gateway response headers: {}                                                                                                                                                                                              |
| 1578275720544 | (dac0d4f6-1380-4049-bcee-bf776ca78e5c) Gateway response type: UNAUTHORIZED with status code: 401                                                                                                                                                                 |
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------

此时我完全卡住了，不知道如何进一步调试。我假设某些东西必须配置错误，但我能找到的日志信息没有给出任何问题的迹象。我还在下图中粘贴了我的授权人配置的副本：

Authorizer Configuration

Screenshot of one endpoint configured to use the authorizer

Answer 1

我发现了我遇到的问题： 我需要在端点的授权字段以及 CF 堆栈中设置 identitySource: method.request.header.Authorization。

原始 cloudformation 中的自定义授权者定义：

service: 
  name: api-base

frameworkVersion: ">=1.2.0 <2.0.0"

plugins:
  - serverless-plugin-optimize
  - serverless-offline
  - serverless-pseudo-parameters
  - serverless-domain-manager

custom:
  stage: ${self:provider.stage, 'dev'}
  serverless-offline:
    port: ${env:OFFLINE_PORT, '4000'}
  false: false
  cognitoStack: marley-auth
  customDomain:
    domainName: ${env:BE_HOST, ''}
    enabled: ${env:EN_CUSTOM_DOMAIN, self:custom.false}
    stage: ${self:provider.stage, 'dev'}
    createRoute53Record: true

provider:
  name: aws
  runtime: nodejs10.x
  versionFunctions: true
  apiName: public
  logs:
    restApi: true
  stackTags:
      COMMIT_SHA: ${env:COMMIT_SHA, 'NO-SHA'}
  environment:
    USER_POOL_ID: ${cf:${self:custom.cognitoStack}-${self:custom.stage}.UserPoolId}
    CLIENT_ID: ${cf:${self:custom.cognitoStack}-${self:custom.stage}.UserPoolClientId}
  timeout: 30
  iamRoleStatements:
  - Effect: "Allow"
    Action:
      - "lambda:InvokeFunction"
    Resource: "*"

functions:
  authorizer:
    handler: handler/authorize.handler

resources:
  - Outputs:
      ApiGatewayRestApiId:
        Value:
          Ref: ApiGatewayRestApi
        Export:
          Name: ${self:custom.stage}-${self:provider.apiName}-ApiGatewayRestApiId
      ApiGatewayRestApiRootResourceId:
        Value:
          Fn::GetAtt:
            - ApiGatewayRestApi
            - RootResourceId 
        Export:
          Name: ${self:custom.stage}-${self:provider.apiName}-ApiGatewayRestApiRootResourceId
      SharedAuthorizerId:
        Value:
          Ref: SharedAuthorizer
        Export:
          Name: ${self:custom.stage}-${self:provider.apiName}-ApiGatewaySharedAuthorizerId
  - Resources:
      SharedAuthorizer:
        Type: AWS::ApiGateway::Authorizer
        Properties:
          Name: public
          AuthorizerUri: !Join 
            - ''
            - - 'arn:aws:apigateway:'
              - !Ref 'AWS::Region'
              - ':lambda:path/2015-03-31/functions/'
              - !GetAtt 
                - AuthorizerLambdaFunction
                - Arn
              - /invocations
          RestApiId: !Ref 'ApiGatewayRestApi'
          Type: REQUEST
          IdentitySource: method.request.header.Authorization
          AuthorizerResultTtlInSeconds: '300'
        DependsOn: AuthorizerLambdaFunction
      ApiAuthLambdaPermission:
        Type: AWS::Lambda::Permission
        Properties:
          Action: lambda:InvokeFunction
          FunctionName: !Ref AuthorizerLambdaFunction
          Principal: apigateway.amazonaws.com
          SourceArn: !Sub "arn:aws:execute-api:#{AWS::Region}:#{AWS::AccountId}:#{ApiGatewayRestApi}/authorizers/*"
        DependsOn: ApiGatewayRestApi

在另一个堆栈中使用授权者 - 请注意，我已在此处指定 IdentitySource 以及在授权者的定义中 - 出于某种原因，我不得不在两个地方都这样做。

authorizer:
  type: CUSTOM
  authorizerId: ${cf:api-base-${self:custom.stage}.SharedAuthorizerId}
  identitySource: method.request.header.Authorization