How to locally test a dockerized app connected with AWS lambda – Amazon Web Sevices

Sorry Docker starter question here.

I’m currently trying to build an app with Python using FastApi and dockerize it. When it’s dockerized I will connect it to an AWS Lambda. The problem is, how can I test my Lambda before deploying it to ECR?

I already tried to use the local Lambda invoke with: localhost:9000/2015-03-31/functions/function/invocations and create a post request reading a file:

{   
"resource": "/",   
"path": "/upload/",   
"httpMethod": "POST",   
"requestContext": {},   
"multiValueQueryStringParameters": null,   
"headers": {     
  "Accept": "application/json",     
  "Content-Type": "application/json"   },   
  "body": {     "filename": "image.jpg" },   
  "files": {     "upload": "image.jpg" } 
}

I don’t get it to work…

Code:

@app.post("/upload/")
async def upload_image(request: Request):
  print(request)
  print(await request.json())
  print(await request.body())
  
  return {"received_request_body": request.json()}


handler = Mangum(app)