brutal_download.py

import socket
import select
from urllib.parse import urlsplit


def brutal_download(url, save_to):
    url_components = urlsplit(url)
    host = url_components.netloc
    s = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
    s.connect((host, 80))
    s.sendall(bytes(f'GET {url_components.path} HTTP/1.1\r\nHOST: {host}\r\n\r\n', 'utf-8'))

    reply = b''

    while select.select([s], [], [], 3)[0]:
        data = s.recv(2048)
        if not data:
            break
        reply += data

    headers = reply.split(b'\r\n\r\n')[0]
    full_data = reply[len(headers)+4:]

    # save image
    with open(save_to, 'wb') as f:
        f.write(full_data)


brutal_download('http://image-net.org/logo.png', 'logo.png')