def get_target_servers():
    s3 = boto3.resource('s3')
    obj = s3.Object(BUCKET_NAME, OBJECT_NAME)
    response = obj.get()
    body = response['Body'].read()
    return body.decode('utf-8')

def check_target_servers(target_json):
    data = json.loads(target_json)
    servers = data['servers']

    error_servers = []

    for server in servers:
        name = server['name']
        url = server['url']
        try:
            res = requests.get(url)
            if res.status_code != 200:
                error_servers.append(server)
        except Exception:
            error_servers.append(server)

    if len(error_servers) == 0:
        print("Successful finished servers checking")
    else:
        response = send_error(name, url, error_servers)
        print("Error occured:")
        print(response)
        print(error_servers)