Feature request: Add support for ALB integration #4758
Description
Use case
Currently event handler does not support the ALB lambda integration. We should add support for Application Load Balancer (ALB) events.
Solution/User Experience
The event source should be transparent to users, they should be able to define handlers that return any valid response we support (JSON object, APIGatewayProxyResult, ALBResult, Web Response object) and event handler will automatically detect the input event and convert to the appropriate response.
const app = new Router();
// this returns APIGatewayProxyResult
app.get('/test', () => ({
statusCode: 200,
body: JSON.stringify({ message: 'success' }),
headers: { 'content-type': 'application/json' },
multiValueHeaders: {
'set-cookie': ['cookie1=value1', 'cookie2=value2']
}
}));
const v1Result = await app.resolve(aV1Event, context);
/**
v1Result = {
"statusCode": 200,
"headers": {
"content-type": "application/json",
},
"body": "{\"message\":\"success\"}",
"isBase64Encoded": false,
"multiValueHeaders": {
"set-cookie": [
"cookie1=value1",
"cookie2=value2"
]
}
}
*/
const albResult = await app.resolve(anALBEvent, context);
/**
albResult = {
"statusCode": 200,
"statusDescription": "200 OK",
"headers": {
"content-type": "application/json",
},
"body": "{\"message\":\"success\"}",
"isBase64Encoded": false,
"multiValueHeaders": {
"set-cookie": [
"cookie1=value1",
"cookie2=value2"
]
}
}
**/Alternative solutions
Alternative solution would be for customers to have specific resolvers for specific event sources:
const albiRouter = new AlbRouter()
// will only work with ALB eventsAcknowledgment
- This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
- Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET
Future readers
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