AWS T Textract函数不向SNS主题发布消息

Question

我正在使用AWS Textract，我想要分析一个多页文档，因此我必须使用异步选项，所以我首先使用了startDocumentAnalysis函数，我得到了一个JobId作为返回值，但它需要触发一个函数，该函数是我设置为在SNS主题收到消息时触发的。

这些是我的无服务器文件和处理程序文件。

provider:
  name: aws
  runtime: nodejs8.10
  stage: dev
  region: us-east-1
  iamRoleStatements:
    - Effect: "Allow"
      Action:
       - "s3:*"
      Resource: { "Fn::Join": ["", ["arn:aws:s3:::${self:custom.secrets.IMAGE_BUCKET_NAME}", "/*" ] ] }
    - Effect: "Allow"
      Action:
        - "sts:AssumeRole"
        - "SNS:Publish"
        - "lambda:InvokeFunction"
        - "textract:DetectDocumentText"
        - "textract:AnalyzeDocument"
        - "textract:StartDocumentAnalysis"
        - "textract:GetDocumentAnalysis"
      Resource: "*"

custom:
  secrets: ${file(secrets.${opt:stage, self:provider.stage}.yml)}

functions:
  routes:
    handler: src/functions/routes/handler.run
    events:
      - s3:
          bucket: ${self:custom.secrets.IMAGE_BUCKET_NAME}
          event: s3:ObjectCreated:*

  textract:
    handler: src/functions/routes/handler.detectTextAnalysis
    events:
      - sns: "TextractTopic"

resources:
  Resources:
    TextractTopic:
        Type: AWS::SNS::Topic
        Properties:
          DisplayName: "Start Textract API Response"
          TopicName: TextractResponseTopic

Handler.js

module.exports.run = async (event) => {
  const uploadedBucket = event.Records[0].s3.bucket.name;
  const uploadedObjetct = event.Records[0].s3.object.key;

  var params = {
    DocumentLocation: {
      S3Object: {
        Bucket: uploadedBucket,
        Name: uploadedObjetct
      }
    },
    FeatureTypes: [
      "TABLES", 
      "FORMS"
    ],
    NotificationChannel: {
      RoleArn: 'arn:aws:iam::<accont-id>:role/qvalia-ocr-solution-dev-us-east-1-lambdaRole', 
      SNSTopicArn: 'arn:aws:sns:us-east-1:<accont-id>:TextractTopic'
    }
  };

  let textractOutput = await new Promise((resolve, reject) => {
    textract.startDocumentAnalysis(params, function(err, data) {
      if (err) reject(err); 
      else resolve(data);
    });
  });
}

我手动向该主题发布了一条sns消息，然后它触发了textract lambda，它当前具有以下内容：

module.exports.detectTextAnalysis = async (event) => {
  console.log('SNS Topic isssss Generated');
  console.log(event.Records[0].Sns.Message);
};

我的错误是什么?为什么textract startDocumentAnalysis没有发布消息并使其触发lambda？

注意:在使用startTextAnalysis函数之前，我没有使用过startDocumentTextDetection，尽管在此之前没有必要调用它。

Answer 1

确保您的信任关系中包含您正在使用的角色：

{
  "Version": "2012-10-17",
  "Statement": [
    {
      "Effect": "Allow",
      "Principal": {
        "Service": [
          "lambda.amazonaws.com",
          "textract.amazonaws.com"
        ]
      },
      "Action": "sts:AssumeRole"
    }
  ]
}

Answer 2

SNS主题名称必须为AmazonTextract

最后，您的arn应该如下所示：

arn:aws:sns:us-east-2:111111111111:AmazonTextract

Answer 3

通过在我的serverless.yml文件中添加一个Lambda执行资源，我可以直接通过Serverless Framework来实现这个功能：

resources:
  Resources:
    IamRoleLambdaExecution:
      Type: AWS::IAM::Role
      Properties:
        AssumeRolePolicyDocument:
          Version: "2012-10-17"
          Statement:
            - Effect: Allow
              Principal:
                Service:
                  - lambda.amazonaws.com
                  - textract.amazonaws.com
              Action: sts:AssumeRole

然后，我使用Serverless (用于lambda函数)生成的相同角色作为启动Textract文档分析时的通知通道角色参数：

感谢这个this post为我指明了正确的方向！