Write a CloudFormation YAML for a DynamoDB table named "redirect\_lookup" with a partition key named "lookup" of type string and a attribute named "redirect" of type string. Write a API Gateway REST endpoint with a path parameter named "lookupkey" calling a lambda written in nodeJS, embedded as code in the YAML that does a lookup against the DynamoDB table and performs a HTTP redirect to the corresponding "redirect" url. Send all log output from the API Gateway and the lambda to a cloudwatch log group
user
here's a cloudformation template written in yaml that defines a dynamodb table with the specified attributes, an api gateway rest endpoint with a path parameter, a node.js lambda function using inline code, and a cloudwatch log group for storing the logs.

```yaml
awstemplateformatversion: '2010-09-09'
resources:
  redirectlookuptable:
    type: aws::dynamodb::table
    properties:
      tablename: redirect_lookup
      attributedefinitions:
        - attributename: lookup
          attributetype: s
        - attributename: redirect
          attributetype: s
      keyschema:
        - attributename: lookup
          keytype: hash
      provisionedthroughput:
        readcapacityunits: 1
        writecapacityunits: 1

  redirectlambdafunction:
    type: aws::lambda::function
    properties:
      handler: index.handler
      runtime: nodejs14.x
      role: !getatt 'lambdaexecutionrole.arn'
      code:
        zipfile: |
          const aws = require("aws-sdk");
          const dynamodb = new aws.dynamodb.documentclient();
     
          exports.handler = async (event) => {
            const lookup = event.pathparameters.lookupkey;
            const params = {
              tablename: "redirect_lookup",
              key: { lookup }
            };
            try {
              const result = await dynamodb.get(params).promise();
              return {
                statuscode: 302,
                headers: {
                  "location": result.item.redirect
                }
              };
            } catch (error) {
              console.error("error:", error);
              return {
                statuscode: 500,
                body: json.stringify({ message: "an error occurred" })
              };
            }
          };

  lambdaexecutionrole:
    type: aws::iam::role
    properties:
      assumerolepolicydocument:
        version: '2012-10-17'
        statement:
          - effect: allow
            principal:
              service:
                - lambda.amazonaws.com
            action:
              - 'sts:assumerole'
      policies:
        - policyname: dynamodbaccesspolicy
          policydocument:
            version: '2012-10-17'
            statement:
              - effect: allow
                action:
                  - 'dynamodb:getitem'
                resource: !getatt 'redirectlookuptable.arn'

  redirectapi:
    type: aws::apigateway::restapi
    properties:
      name: redirectapi
      description: api to perform lookup and redirection

  redirectresource:
    type: aws::apigateway::resource
    properties:
      restapiid: !ref redirectapi
      parentid: !getatt 'redirectapi.rootresourceid'
      pathpart: '{lookupkey}'

  redirectmethod:
    type: aws::apigateway::method
    properties:
      httpmethod: get
      resourceid: !ref redirectresource
      restapiid: !ref redirectapi
      authorizationtype: none
      integration:
        type: aws_proxy
        integrationhttpmethod: post
        uri: !sub 'arn:aws:apigateway:${aws::region}:lambda:path/2015-03-31/functions/${redirectlambdafunction.arn}/invocations'
      methodresponses:
        - statuscode: 302
          responsemodels:
            application/json: 'empty'

  redirectapipermission:
    type: aws::lambda::permission
    properties:
      action: 'lambda:invokefunction'
      functionname: !ref redirectlambdafunction
      principal: apigateway.amazonaws.com
      sourcearn: !sub 'arn:aws:execute-api:${aws::region}:${aws::accountid}:${redirectapi}/*/*'

  cloudwatchlogs:
    type: aws::logs::loggroup
    properties:
      loggroupname: '/aws/lambda/redirect'

outputs:
  apiendpoint:
    description: 'url of the api endpoint'
    value: !sub 'https://${redirectapi}.execute-api.${aws::region}.amazonaws.com/${!stage}'
```

this template creates a dynamodb table named "redirect_lookup," a lambda function called "redirectlambdafunction," an api gateway rest api, and a log group in cloudwatch logs. the lambda function reads from the specified dynamodb table and returns an http redirect to the corresponding url.
assistant
Here's a CloudFormation template written in YAML that defines a DynamoDB table with the specified attributes, an API Gateway REST endpoint with a path parameter, a Node.js Lambda function using inline code, and a CloudWatch log group for storing the logs.

```yaml
AWSTemplateFormatVersion: '2010-09-09'
Resources:
  RedirectLookupTable:
    Type: AWS::DynamoDB::Table
    Properties:
      TableName: redirect_lookup
      AttributeDefinitions:
        - AttributeName: lookup
          AttributeType: S
        - AttributeName: redirect
          AttributeType: S
      KeySchema:
        - AttributeName: lookup
          KeyType: HASH
      ProvisionedThroughput:
        ReadCapacityUnits: 1
        WriteCapacityUnits: 1

  RedirectLambdaFunction:
    Type: AWS::Lambda::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs14.x
      Role: !GetAtt 'LambdaExecutionRole.Arn'
      Code:
        ZipFile: |
          const AWS = require("aws-sdk");
          const DynamoDB = new AWS.DynamoDB.DocumentClient();
     
          exports.handler = async (event) => {
            const lookup = event.pathParameters.lookupkey;
            const params = {
              TableName: "redirect_lookup",
              Key: { lookup }
            };
            try {
              const result = await DynamoDB.get(params).promise();
              return {
                statusCode: 302,
                headers: {
                  "Location": result.Item.redirect
                }
              };
            } catch (error) {
              console.error("Error:", error);
              return {
                statusCode: 500,
                body: JSON.stringify({ message: "An error occurred" })
              };
            }
          };

  LambdaExecutionRole:
    Type: AWS::IAM::Role
    Properties:
      AssumeRolePolicyDocument:
        Version: '2012-10-17'
        Statement:
          - Effect: Allow
            Principal:
              Service:
                - lambda.amazonaws.com
            Action:
              - 'sts:AssumeRole'
      Policies:
        - PolicyName: DynamoDBAccessPolicy
          PolicyDocument:
            Version: '2012-10-17'
            Statement:
              - Effect: Allow
                Action:
                  - 'dynamodb:GetItem'
                Resource: !GetAtt 'RedirectLookupTable.Arn'

  RedirectAPI:
    Type: AWS::ApiGateway::RestApi
    Properties:
      Name: RedirectAPI
      Description: API to perform lookup and redirection

  RedirectResource:
    Type: AWS::ApiGateway::Resource
    Properties:
      RestApiId: !Ref RedirectAPI
      ParentId: !GetAtt 'RedirectAPI.RootResourceId'
      PathPart: '{lookupkey}'

  RedirectMethod:
    Type: AWS::ApiGateway::Method
    Properties:
      HttpMethod: GET
      ResourceId: !Ref RedirectResource
      RestApiId: !Ref RedirectAPI
      AuthorizationType: NONE
      Integration:
        Type: AWS_PROXY
        IntegrationHttpMethod: POST
        Uri: !Sub 'arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${RedirectLambdaFunction.Arn}/invocations'
      MethodResponses:
        - StatusCode: 302
          ResponseModels:
            application/json: 'Empty'

  RedirectAPIPermission:
    Type: AWS::Lambda::Permission
    Properties:
      Action: 'lambda:InvokeFunction'
      FunctionName: !Ref RedirectLambdaFunction
      Principal: apigateway.amazonaws.com
      SourceArn: !Sub 'arn:aws:execute-api:${AWS::Region}:${AWS::AccountId}:${RedirectAPI}/*/*'

  CloudWatchLogs:
    Type: AWS::Logs::LogGroup
    Properties:
      LogGroupName: '/aws/lambda/redirect'

Outputs:
  APIEndpoint:
    Description: 'URL of the API endpoint'
    Value: !Sub 'https://${RedirectAPI}.execute-api.${AWS::Region}.amazonaws.com/${!Stage}'
```

This template creates a DynamoDB table named "redirect_lookup," a Lambda function called "RedirectLambdaFunction," an API Gateway REST API, and a log group in CloudWatch Logs. The Lambda function reads from the specified DynamoDB table and returns an HTTP redirect to the corresponding URL.
assistant