test.py

#!/usr/bin/env python2
import requests
import time

max_timeout = 10
max_buffer_size = 1024 * 1024

r = requests.get('http://localhost:8888', stream=True, timeout=max_timeout)
r.raise_for_status()

size = 0
start = time.time()  

for chunk in r.iter_content(1024):
    if time.time() - start > max_timeout:
        raise ValueError('timeout reached')  

    size += len(chunk)
    if size > max_buffer_size:
        print max_buffer_size
        raise ValueError('response too large')