Use a AWS Lambda to send a notification when a file was added to AWS s3

lambda_handler.py

#####################################
# Notify when a s3 file was created #
#####################################

import json
import boto3
import urllib.parse
import urllib.request

print('Loading function')
s3 = boto3.client('s3')

def lambda_handler(event, context):
    print("Received event: " + json.dumps(event, indent=2))
    
    bucket = event['Records'][0]['s3']['bucket']['name']
    key = urllib.parse.unquote_plus(event['Records'][0]['s3']['object']['key'], encoding='utf-8')
    
    url = 'YOUR_URL'
    values = { 'Key' : key }
    
    try:
        
        # Set the data to send
        data = json.dumps(values)
        data = data.encode('utf-8')
        
        # Set the headers
        headers = {}
        headers['Content-Type'] = "application/json"
    
        # Send the request
        req = urllib.request.Request(url, data, headers)
        resp = urllib.request.urlopen(req)
        
        # Receive the response
        respData = resp.read()
        print(respData)
        
    except Exception as e:
        print(e)
        print('Error getting object {} from bucket {}.'.format(key, bucket))
        raise e