getRecLambda.py

import json

import boto3


def lambda_handler(event, context):

    query = event["queryStringParameters"]

    if not query:
        return {"statusCode": 400, "body": json.dumps({"message": "No query parameters found"})}

    user_id = query["userID"]

    if not user_id:
        return {"statusCode": 400, "body": json.dumps({"message": "Please specify a user ID"})}

    personalize_runtime = boto3.client("personalize-runtime")
    campaign_arn = ""

    get_recommendations_response = personalize_runtime.get_recommendations(
        campaignArn=campaign_arn,
        userId=str(user_id),
    )

    item_list = get_recommendations_response["itemList"]

    return {
        "statusCode": 200,
        "headers": {
            "Access-Control-Allow-Headers": "Content-Type",
            "Access-Control-Allow-Origin": "*",
            "Access-Control-Allow-Methods": "OPTIONS,POST,GET",
        },
        "body": json.dumps({"items": item_list}),
    }