Python standard library (http.server) Python

import base64
from http.server import BaseHTTPRequestHandler, ThreadingHTTPServer
from urllib.parse import urlsplit

GIF = base64.b64decode("R0lGODlhAQABAIAAAP///wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw==")


class PixelHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        if urlsplit(self.path).path != "/pixel.gif":
            self.send_error(404)
            return
        self.send_response(200)
        self.send_header("Content-Type", "image/gif")
        self.send_header("Content-Length", str(len(GIF)))
        self.send_header("Cache-Control", "no-store")
        self.end_headers()
        self.wfile.write(GIF)


ThreadingHTTPServer(("", 8080), PixelHandler).serve_forever()