### Install and Start Azure Function v4

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/azure-http-function-v4/README.md

Commands to navigate to the example directory, install dependencies, and start the local development server.

```bash
  cd examples/azure-http-function-v4
  npm install
  npm run start
```

--------------------------------

### Install Dependencies and Start UI

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Install project dependencies and start the UI in development or production mode.

```sh
npm i
npm run start:dev # or npm run start:prod
```

--------------------------------

### Install and Run Example Locally

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-edge/README.md

Commands to update the serverless-express dependency, install project dependencies, build the project, and run it locally for development.

```bash
npm pack ../..
npm install ./codegenie-serverless-express-4.0.0-rc.1.tgz
npm install
npm run build
npm run local
```

--------------------------------

### Local Development Setup for Serverless Express

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/dynamodb-stream/README.md

Use these commands to package the Serverless Express library, install it locally, and run the local development server.

```bash
npm pack ../..
```

```bash
npm install ./codegenie-serverless-express-4.0.0-rc.1.tgz
```

```bash
npm install --prefix ./src ./
```

```bash
node local.js
```

--------------------------------

### Local Development Setup for Serverless Express

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/alb/README.md

Use these commands to package the Serverless Express library, install it locally, and run the local development server. Ensure you are in the correct directory before executing.

```bash
npm pack ../..
```

```bash
npm install ./codegenie-serverless-express-4.0.0-rc.3.tgz
```

```bash
npm install --prefix ./src ./
```

```bash
node local.js
```

--------------------------------

### Run Setup Script for Serverless Express App

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

This command installs Node.js dependencies, creates an S3 bucket if it doesn't exist, packages and deploys the serverless Express application to AWS Lambda, and creates an API Gateway proxy API.

```bash
npm run setup
```

--------------------------------

### Install Dependencies

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-nestjs/README.md

Install the necessary project dependencies.

```bash
$ npm install
```

--------------------------------

### Clone and Navigate to Example Directory

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

Use these commands to clone the serverless-express repository and navigate to the basic starter API Gateway v2 example directory.

```bash
git clone https://github.com/CodeGenieApp/serverless-express.git && cd serverless-express/examples/basic-starter-api-gateway-v2
```

--------------------------------

### Run Local API and UI Development

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Start the API and UI locally in separate terminals for rapid iteration. This setup uses cloud resources for database and authentication.

```sh
npm run start-api:dev
```

```sh
npm run start-ui-local-api:dev
```

--------------------------------

### Clone Serverless Express Example

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2-typescript/README.md

Clone the serverless-express repository and navigate to the basic starter API example directory.

```sh
git clone https://github.com/CodeGenieApp/serverless-express.git && cd serverless-express/examples/basic-starter-api-gateway-v2-typescript
```

--------------------------------

### Initialize Developer Instance

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Run this command to deploy a developer instance to your AWS account, including dependency installation, credential setup, CDK bootstrapping, deployment, and local environment configuration.

```sh
npm run init:dev
```

--------------------------------

### Install Serverless Express

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-koa/README.md

Install the serverless-express package into your existing project directory.

```bash
npm install --save @codegenie/serverless-express
```

--------------------------------

### Async Setup Lambda Handler (JavaScript)

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Use this pattern when your Lambda function needs to perform asynchronous bootstrap tasks, like database connections, before handling requests. It ensures setup runs only once.

```javascript
// lambda.js
require('source-map-support/register')
const serverlessExpress = require('@codegenie/serverless-express')
const app = require('./app')

let serverlessExpressInstance

function asyncTask () {
  return new Promise((resolve) => {
    setTimeout(() => resolve('connected to database'), 1000)
  })
}

async function setup (event, context) {
  const asyncValue = await asyncTask()
  console.log(asyncValue)
  serverlessExpressInstance = serverlessExpress({ app })
  return serverlessExpressInstance(event, context)
}

function handler (event, context) {
  if (serverlessExpressInstance) return serverlessExpressInstance(event, context)

  return setup(event, context)
}

exports.handler = handler
```

--------------------------------

### Update Serverless Express Locally

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-koa/README.md

Commands to update the example against the latest local changes to serverless-express. This involves packing the library, installing it locally, and running the local simulation.

```bash
npm pack ../..
npm install ./codegenie-serverless-express-4.0.0-rc.1.tgz
npm install --prefix ./src .
npm run local
```

--------------------------------

### Start UI in Development Mode

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Launch the UI locally for development after deploying to your AWS account.

```sh
npm run start-ui:dev
```

--------------------------------

### Install Serverless Express

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Install the serverless-express package using npm. This is the first step to integrate your Node.js web application with serverless platforms.

```bash
npm install @codegenie/serverless-express
```

--------------------------------

### Update local development environment

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

Commands to install local dependencies, build the project, and run a local simulation.

```bash
npm i ../..
npm run build
npm run local
```

--------------------------------

### API Gateway Binary Media Types Configuration

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Example configuration for API Gateway's Binary Media Types in SAM. This should align with the `binarySettings` in Serverless Express.

```yaml
ExpressApi:
  Type: AWS::Serverless::Api
  Properties:
    StageName: prod
    BinaryMediaTypes: ['image/*']
```

--------------------------------

### Azure Functions Core Tools Output

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/azure-http-function-v4/README.md

Expected console output after successfully starting the local Azure Functions environment.

```text
Azure Functions Core Tools
Core Tools Version:       4.0.4590
Function Runtime Version: 4.5.2.18383


Functions:

        HttpExample:  http://localhost:7071/api/{*segments}
```

--------------------------------

### Delete S3 Bucket

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

If you specified a new S3 bucket during the setup and want to delete it, use this command.

```bash
npm run delete-bucket
```

--------------------------------

### Delete CloudFormation Stack

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

This command deletes the CloudFormation Stack, including the API and Lambda Function, that was created during the setup process.

```bash
npm run delete-stack
```

--------------------------------

### Bootstrap CDK for Production Environment

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/packages/cdk/README.md

Run this command to bootstrap the AWS CDK for the 'todo_production' environment. This prepares your AWS account for CDK deployments.

```bash
cdk bootstrap --profile todo_production
```

--------------------------------

### Run Local Development

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-nestjs/README.md

Simulate the application running on AWS Lambda locally.

```bash
$ npm run sls:offline
```

--------------------------------

### Bootstrap CDK for Development Environment

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/packages/cdk/README.md

Run this command to bootstrap the AWS CDK for the 'todo_development' environment. This prepares your AWS account for CDK deployments.

```bash
cdk bootstrap --profile todo_development
```

--------------------------------

### Bootstrap CDK for Staging Environment

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/packages/cdk/README.md

Run this command to bootstrap the AWS CDK for the 'todo_staging' environment. This prepares your AWS account for CDK deployments.

```bash
cdk bootstrap --profile todo_staging
```

--------------------------------

### Deploy to AWS

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-nestjs/README.md

Deploy the application to AWS using the Serverless framework after configuring credentials.

```bash
$ npm run sls:deploy
```

--------------------------------

### Package and Deploy Node.js Project

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-koa/README.md

Use this command to package and deploy your Node.js project after making updates to app.js.

```bash
npm run package-deploy
```

--------------------------------

### Deploy CDK Stack

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Bootstrap the CDK in your AWS account and deploy the application. This command may run deploy twice due to UI dependencies.

```sh
npm run cdk-bootstrap:dev
```

```sh
npm run deploy:dev
```

--------------------------------

### Deploy Serverless Express App Without Approval

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/packages/cdk/README.md

Use this command to deploy the application when prompted for confirmation. It bypasses the 'Please confirm you intend to make the following modifications:' prompt.

```bash
npm run deploy:dev -- --require-approval=never
```

--------------------------------

### Local Simulation of API Gateway and Lambda

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-koa/README.md

Update api-gateway-event.json with valid values and run this command for a local simulation of API Gateway and Lambda.

```bash
npm run local
```

--------------------------------

### Generate Serverless Express Project

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Use this command to generate a new serverless Express project with specified name, description, and deployment enabled.

```sh
npx @codegenie/cli generate \
--name "Todo" \
--description "A todo list app that lets users create lists and add items to the list. Items should have a title, description, be markable as completed, have a due date, and have an image." --deploy
```

--------------------------------

### Configure AWS Credentials for Initialization

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Customize AWS credential copying during `init:dev`. Use `COPY_AWS_PROFILE` to specify a profile to copy from, or set it to `0` to manually define the `todo_development` profile.

```sh
COPY_AWS_PROFILE=profile-name-to-copy npm run init:dev
```

```sh
COPY_AWS_PROFILE=0 npm run init:dev
```

--------------------------------

### Skip Web App Deployment

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/packages/cdk/README.md

Include this context flag when deploying to skip the building and deployment of the web application. Useful for backend-only updates.

```bash
--context skipDeployWebApp=true
```

--------------------------------

### Configure UI API Endpoint

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Modify the UI's environment file to set the API endpoint. Change `NEXT_PUBLIC_ApiEndpoint` to one of the provided gateway, Lambda, or CloudFront URLs.

```sh
NEXT_PUBLIC_ApiEndpoint
```

--------------------------------

### Run Load Tests

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Execute load tests using one of the configured tools: autocannon or artillery.

```sh
npm run [loadtest | loadtest:autocannon | loadtest:artillery]
```

--------------------------------

### Configure Binary Response Settings

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Specify custom logic for determining if a response should be base64 encoded. Useful for images or compressed files. Ensure matching settings in API Gateway.

```javascript
{
  binarySettings: {
    isBinary: ({ headers }) => true,
    contentTypes: ['image/*'],
    contentEncodings: []
  }
}
```

--------------------------------

### Update Removed Options from v4 to v5

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/UPGRADE.md

The `resolutionMode` option is removed in v5.x, as only Promise-based resolution is supported. `binaryMimeTypes` is replaced by `binarySettings`.

```javascript
// 4.x (deprecated)
serverlessExpress({
  app,
  resolutionMode: 'CALLBACK',  // ❌ Removed
  binaryMimeTypes: ['image/*'] // ❌ Removed
})

// 5.x
serverlessExpress({
  app,
  binarySettings: {
    contentTypes: ['image/*']
  }
})
```

--------------------------------

### Enable Error Stack Trace Reporting

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Set `respondWithErrors` to true to include error stack traces in responses for unhandled exceptions. Useful for development environments.

```javascript
serverlessExpress({
  app,
  respondWithErrors: true
})
```

--------------------------------

### Migrate Lambda Handler from v3 to v4

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/UPGRADE.md

In v4.x, `binaryMimeTypes` is not required as the `isBase64Encoded` Lambda response value is automatically determined. For additional control, `binarySettings` can be specified.

```javascript
// 3.x
const awsServerlessExpress = require('aws-serverless-express')
const app = require('./app')

const binaryMimeTypes = [
  'image/*'
]
const server = awsServerlessExpress.createServer(app, null, binaryMimeTypes)

exports.handler = (event, context) => { awsServerlessExpress.proxy(server, event, context) }

```

```javascript
// 4.x
const serverlessExpress = require('@codegenie/serverless-express')
const app = require('./app')

exports.handler = serverlessExpress({ app })
```

```javascript
serverlessExpress({
  app,
  binarySettings: {
    isBinary: ({ headers }) => true,
    contentTypes: [],
    contentEncodings: []
  }
})
```

--------------------------------

### Minimal Lambda Handler Wrapper (JavaScript)

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

This is the simplest way to integrate your Express app with AWS Lambda. Ensure your Express app is exported from './app.js'.

```javascript
// lambda.js
const serverlessExpress = require('@codegenie/serverless-express')
const app = require('./app')
exports.handler = serverlessExpress({ app })
```

--------------------------------

### Pull CloudFormation/CDK Outputs

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/lambda-function-url/README.md

Re-run this command if the `cdk-outputs.json` file is missing or corrupted, often after a CloudFormation rollback.

```sh
npm run pull-stack-outputs:dev
```

--------------------------------

### Custom Logger Implementation

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Provide a custom logger object with 'info', 'debug', and 'error' methods to override the default logging behavior. This allows integration with external logging libraries like Winston.

```javascript
{
  log: {
    info (message, additional) {
      console.info(message, additional)
    },
    debug (message, additional) {
      console.debug(message, additional)
    },
    error (message, additional) {
      console.error(message, additional)
    }
  }
}
```

--------------------------------

### Invoke Lambda Function

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/basic-starter-api-gateway-v2/README.md

To invoke the Lambda function directly, first copy the LambdaFunctionName from the CloudFormation Outputs and paste it into the package.json config's functionName property. Then, run this command to invoke the Lambda Function with the payload specified in api-gateway-event.json.

```bash
npm run invoke-lambda
```

--------------------------------

### Update Handler Signature from v4 to v5

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/UPGRADE.md

In v5.x, the handler must be used with async/Promise patterns only and uses a default export. Version 4.x still supports callback-based patterns but they are no longer supported in v5.x.

```javascript
// 4.x (still works but callback-based patterns no longer supported)
exports.handler = serverlessExpress({ app })

// 5.x (same, but MUST be async/Promise-based)
export default serverlessExpress({ app })
```

--------------------------------

### Custom Event Source Mapping

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Provide custom request and response mappers for integrating with event sources not natively supported by Serverless Express. Ensure your mappers correctly transform event data into Express-compatible request objects and vice versa.

```javascript
function requestMapper ({ event }) {
  // Your logic here...

  return {
    method,
    path,
    headers
  }
}

function responseMapper ({
  statusCode,
  body,
  headers,
  isBase64Encoded
}) {
  // Your logic here...

  return {
    statusCode,
    body,
    headers,
    isBase64Encoded
  }
}

serverlessExpress({
  app,
  eventSource: {
    getRequest: requestMapper,
    getResponse: responseMapper
  }
})
```

--------------------------------

### Azure Function Configuration

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

This JSON defines the bindings for an Azure Function, crucial for Serverless Express integration. The '$return' out-binding is essential for proper operation.

```json
// function.json
{
  "bindings": [
    {
      "authLevel": "anonymous",
      "type": "httpTrigger",
      "direction": "in",
      "name": "req",
      "route": "{*segments}"
    },
    {
      "type": "http",
      "direction": "out",
      "name": "$return"
    }
  ]
}
```

--------------------------------

### Set Lambda Resolution Mode to Callback

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Configure Serverless Express to use the callback method for Lambda function resolution. This also sets `context.callbackWaitsForEmptyEventLoop = false`.

```javascript
serverlessExpress({
  app,
  resolutionMode: 'CALLBACK'
})
```

--------------------------------

### Access Lambda Event and Context from v3 to v4

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/UPGRADE.md

In v4.x, `getCurrentInvoke` from `@codegenie/serverless-express` is used to access the Lambda event and context, replacing the `awsServerlessExpressMiddleware.eventContext()` middleware from v3.x.

```javascript
// 3.x
const awsServerlessExpressMiddleware = require('aws-serverless-express/middleware')
router.use(awsServerlessExpressMiddleware.eventContext())
router.get('/', (req, res) => {
  res.json({
    stage: req.apiGateway.event.requestContext.stage
  })
})

```

```javascript
// 4.x
const { getCurrentInvoke } = require('@codegenie/serverless-express')
router.get('/', (req, res) => {
const currentInvoke = getCurrentInvoke()
  res.json({
    stage: currentInvoke.event.requestContext.stage
  })
})

```

--------------------------------

### Event Source Routing Configuration

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Configure Serverless Express to route specific AWS event types (SNS, DynamoDB Streams, SQS, EventBridge) to designated Express routes. Events are typically POSTed to these routes. Ensure the 'Host' header matches the expected AWS service endpoint for security.

```yaml
functions:
  lambda-handler:
    handler: src/lambda.handler
    events:
      - http:
          path: /
          method: get
      - sns:
          topicName: my-topic
      - stream:
          type: dynamodb
          arn: arn:aws:dynamodb:us-east-1:012345678990:table/my-table/stream/2021-07-15T15:05:51.683
      - sqs:
          arn: arn:aws:sqs:us-east-1:012345678990:myQueue
      - eventBridge:
          pattern:
            source:
              - aws.cloudformation
```

```javascript
serverlessExpress({
  app,
  eventSourceRoutes: {
    'AWS_SNS': '/sns',
    'AWS_DYNAMODB': '/dynamodb',
    'AWS_SQS': '/sqs'
    'AWS_EVENTBRIDGE': '/eventbridge',
    'AWS_KINESIS_DATA_STREAM': '/kinesis',
    'AWS_S3': '/s3',
    'AWS_STEP_FUNCTIONS': '/step-functions',
    'AWS_SELF_MANAGED_KAFKA': '/self-managed-kafka',
  }
})
```

```javascript
serverlessExpress({
  app,
  eventSourceRoutes: {
    'AWS_SNS': '/sns',
  }
})
```

--------------------------------

### Log Level Configuration

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Configure the log level for the default logger in Serverless Express. Set to 'debug' for more verbose logging, or 'error' (default) for minimal logging.

```javascript
{
  logSettings: {
    level: 'debug' // default: 'error'
  }
}
```

--------------------------------

### Azure Function v3/v4 Handler Wrapper

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

This JavaScript code wraps the Serverless Express application for use within an Azure Function. It requires the '@codegenie/serverless-express' package and your Express app definition.

```javascript
// index.js
const serverlessExpress = require('@codegenie/serverless-express')
const app = require('./app')
const cachedServerlessExpress = serverlessExpress({ app })

module.exports = async function (context, req) {
  return cachedServerlessExpress(context, req)
}
```

--------------------------------

### Update app.js for Serverless-Express

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/examples/sails-example/README.md

Modify `app.js` to export a promise that resolves with the Sails.js HTTP app instance. This is necessary for simulating a Lambda handler invocation.

```javascript
const appPromise = new Promise((resolve) => {
  sails.lift(rc('sails'), () => {
    resolve(sails.hooks.http.app)
  })
})

module.exports = appPromise

```

--------------------------------

### Accessing Lambda Event and Context Objects

Source: https://github.com/codegenieapp/serverless-express/blob/mainline/README.md

Use the `getCurrentInvoke` function to retrieve the `event` and `context` objects provided by AWS Lambda. This is useful for inspecting incoming request details or Lambda runtime information.

```javascript
const { getCurrentInvoke } = require('@codegenie/serverless-express')
app.get('/', (req, res) => {
  const { event, context } = getCurrentInvoke()

  res.json(event)
})
```

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