import json

import time

import requests

from typing import Dict, Any

def collect_payload_metrics(url: str, max_attempts: int = 3, timeout: int = 5) -> Dict[str, Any]:

"""

Collects metrics of JSON payloads from a given URL with a timeout and retry mechanism.

Args:

url: The URL to fetch the JSON payload from.

max_attempts: Maximum number of retry attempts.

timeout: Timeout in seconds for each request.

Returns:

A dictionary containing metrics such as success/failure, response time,

and potential error messages.

"""

metrics = {

"success": False,

"response_time": None,

"error_message": None,

"payload_size": None

}

for attempt in range(max_attempts):

try:

start_time = time.time()

response = requests.get(url, timeout=timeout)

end_time = time.time()

response.raise_for_status() # Raise HTTPError for bad responses (4xx or 5xx)

metrics["success"] = True

metrics["response_time"] = end_time - start_time

metrics["payload_size"] = len(response.content)

try:

payload = response.json()

except json.JSONDecodeError:

metrics["error_message"] = "Invalid JSON response"

break

return metrics # Exit on success

except requests.exceptions.RequestException as e:

metrics["error_message"] = str(e)

if attempt < max_attempts - 1:

print(f"Attempt {attempt + 1} failed: {e}. Retrying...")

time.sleep(1) # Wait before retrying

else:

print(f"Max attempts reached. Failed to retrieve payload.")

return metrics

except Exception as e:

metrics["error_message"] = str(e)

return metrics # Return on unexpected error

if __name__ == '__main__':

# Example usage

test_url = "https://jsonplaceholder.typicode.com/todos/1" # Replace with your URL

metrics = collect_payload_metrics(test_url)

print(metrics)

test_url_invalid = "https://httpstat.us/500" #Example of a failure

metrics = collect_payload_metrics(test_url_invalid)

print(metrics)