I need to write a cloudformation script to deploy a nodejs lambda with a simple HTTP gateway method. can you generate all the required cloudformation to do this?
user
Certainly, I would be happy to help you with that. Here is a simple AWS CloudFormation template that defines a Node.js Lambda function with an HTTP trigger and a custom API Gateway.

```yaml
Resources:
  MyFunction:
    Type: AWS::Lambda::Function
    Properties:
      FunctionName: my-function
      Handler: index.handler
      Runtime: nodejs14.x
      Architecture: x64
      Timeout: PT5M
      Code:
        ZipFile:
          Fn::Base64:
            - |
              #!/usr/bin/env node

              const http = require('http');

              const server = http.createServer((req, res) => {
                const method = req.method;
                const url = req.url;

                console.log(`Received ${method} request for ${url}`);

                res.statusCode = 200;
                res.setHeader('Content-Type', 'application/json');
                res.writeHead(200);
                res.end(JSON.stringify({ message: `Hello from ${method} ${url}` }));
              });

              server.listen(3000, () => {
                console.log('server is listening!');
              });

      Environment:
        US_WEATHER_API_KEY: us_weather_api_key

  ApiGateway:
    Type: AWS::ApiGateway::RestApi
    Properties:
      Name: my-service-api

  MyMethod:
    Type: AWS::ApiGateway::Method
    Properties:
      AuthorityId:
        Ref: ApiGateway
      AuthorizerId:
        Fn::GetAtt: [MyFunction, Arnn]
      HTTPMethod: GET
      Integration:
        HttpIntegration:
          Type: HTTP_API_GATEWAY_INTEGRATION
          URI:
            Fn::Join:
              - '/'
              - - Ref: ApiGateway
              - '${OPT:api_stage, Self:, '': }'
              - - Ref: Function ARN
          CacheKeyParameters:
            - method.request.url
      ResourceId:
        Ref: ApiGateway
      RestApiId:
        Ref: ApiGateway

  UsagePlan:
    Type: AWS::ApiGateway::UsagePlan
    Properties:
      Name: MyUsagePlan
      ThrottleSettings:
        BurstLimit: 10
        PeriodDuration: PT1H
      QuotaSettings:
        PeriodDuration: PT1H
        Limit: 10

  Stage:
    Type: AWS::ApiGateway::Stage
    Properties:
      DeploymentId:
        Ref: MyFunction
      OrchestrationlayerName: aws:apigateway/${opt:stage, self:, '': }
      RestApiId:
        Ref: ApiGateway
      StageName:
        Fn::Sub: ${opt:stage}-${opt:region, self:, 'Us-East-1': }

  RestApiDeploymentId:
    UpdateReplace:
      ApiGateway:
        - Property:
            FunctionName:
            Type: String
          - Value:
              Fn::ImportValue:
                - !ImportValue
                  - arn:aws:states:${AWS::AccountId}:us-east-1:stateMachine:LambdaFunctionDeploymentForAPIGateway:${AWS::StackId}:${OPT:stage, Self:, '': }
                    - Ref: FunctionARN

ResourcesTo Create:
- MyFunction
- UsagePlan
- RestApiDeploymentId
- ApiGateway
- MyMethod
- RestApiId
- MyResource
- Stage

Mappings:
Mapping: AWS::ApiGateway::Method.Integration.HTTP.CacheKeyParameters:
  - Ref: ResourceId

Mapping: AWS::ApiGateway::Method.RestApiId:
  - Ref: RestApiId

Mapping: AWS::ApiGateway::Method.ResourceId:
  - Ref: ResourceId

Mapping: AWS::ApiGateway::Method.HttpMethod:
  - Ref: HTTPMethod

Mapping: AWS::ApiGateway::HTTPIntegration.IntegrationResponses.200.Body.Content Handler:
  - SbstLang: python
    Sprofit: 2
    V: modify
  - Ref: FuncBody

  ```

  Please make sure to replace `us_weather_api_key` with the actual key from your weather service and update any other required parameters. Also, you'll need to create additional resources and mappings for your specific requirements, such as adding API Gateway resources and methods if required.
assistant
I need to write a cloudformation script to deploy a nodejs lambda with a simple HTTP gateway method. can you generate all the required cloudformation to do this?
user
Certainly! Here is an example CloudFormation template that deploys a Node.js Lambda function with an Amazon API Gateway HTTP API:
```yaml
Resources:
  MyLambdaFunction:
    Type: AWS::Lambda::Function
    Properties:
      Handler: index.handler
      Runtime: nodejs14.x
      Code:
        ZipFile: |
          var response = {
              "statusCode": 200,
              "body": "Hello from Lambda!"
          };
          module.exports.handler = function(event, context, callback) {
              callback(null, response);
          };
      Role: arn:aws:iam::123456789012:role/service-role/MyLambdaFunctionRole

  MyHttpApi:
    Type: AWS::ApiGatewayV2::Api
    Properties:
      Name: MyHttpApi
      ProtocolType: HTTP

  MyLambdaIntegration:
    Type: AWS::ApiGatewayV2::Integration
    Properties:
      ApiId: !Ref MyHttpApi
      Description: Lambda integration for MyHttpApi
      IntegrationType: AWS_PROXY
      IntegrationUri: !Sub arn:aws:apigateway:${AWS::Region}:lambda:path/2015-03-31/functions/${MyLambdaFunction.Arn}/invocations
      PayloadFormatVersion: 2.0

  MyLambdaRoute:
    Type: AWS::ApiGatewayV2::Route
    Properties:
      ApiId: !Ref MyHttpApi
      RouteKey: GET /
      Target: !Sub integrations/${MyLambdaIntegration}```
This template creates a Node.js Lambda function (`MyLambdaFunction`) that returns a simple "Hello from Lambda!" message, an Amazon API Gateway HTTP API (`MyHttpApi`), an integration between the API and the Lambda function (`MyLambdaIntegration`), and a route that maps HTTP GET requests to the root path (`/`) to the Lambda integration (`MyLambdaRoute`).

You will need to replace `arn:aws:iam::123456789012:role/service-role/MyLambdaFunctionRole` with the ARN of an IAM role that has permissions to execute the Lambda function.

You can customize the function code, API, integration, and route properties as needed for your use case.

To deploy this stack, save the template to a file, and then use the AWS CLI or the AWS Management Console to create a CloudFormation stack using the template file.
```bash
aws cloudformation create-stack --stack-name MyStack --template-body file://template.yaml
```
Replace `template.yaml` with the name of the file you saved the template to.

After the stack is created, you can find the URL of the HTTP API in the Outputs tab of the CloudFormation console, or by using the `describe-stacks` command:
```bash
aws cloudformation describe-stacks --stack-name MyStack --query 'Stacks[0].Outputs[?OutputKey==`ApiUrl`].OutputValue'
```
This will return the URL of the API, which you can use to test the Lambda function. For example, if the API URL is `https://1234567890.execute-api.us-east-1.amazonaws.com`, you can invoke the Lambda function by making an HTTP GET request to `https://1234567890.execute-api.us-east-1.amazonaws.com/`.
assistant