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   "source": [
    "import os\n",
    "from urllib.parse import urlparse\n",
    "\n",
    "class JPEGRequestHandler:\n",
    "    def __init__(self, app):\n",
    "        self.app = app\n",
    "\n",
    "    def __call__(self, environ, start_response):\n",
    "        url = urlparse(environ['REQUEST_URI'])\n",
    "        path = url.path\n",
    "\n",
    "        if path.endswith('.jpg'):\n",
    "            file_path = path[1:]\n",
    "\n",
    "            if os.path.isfile(file_path):\n",
    "                with open(file_path, 'rb') as file:\n",
    "                    response_body = file.read()\n",
    "                    status = '200 OK'\n",
    "                    headers = [('Content-type', 'image/jpeg'),\n",
    "                               ('Content-Length', str(len(response_body)))]\n",
    "\n",
    "                    start_response(status, headers)\n",
    "                    return [response_body]\n",
    "            else:\n",
    "                status = '404 Not Found'\n",
    "                headers = [('Content-type', 'text/plain'),\n",
    "                           ('Content-Length', '0')]\n",
    "\n",
    "                start_response(status, headers)\n",
    "                return []\n",
    "        else:\n",
    "            status = '403 Forbidden'\n",
    "            headers = [('Content-type', 'text/plain'),\n",
    "                       ('Content-Length', '0')]\n",
    "\n",
    "            start_response(status, headers)\n",
    "            return []\n",
    "\n",
    "if __name__ == '__main__':\n",
    "    from werkzeug.serving import run_simple\n",
    "    from werkzeug.middleware.dispatcher import DispatcherMiddleware\n",
    "\n",
    "    app = DispatcherMiddleware(JPEGRequestHandler(app), {'/': app})\n",
    "    run_simple('0.0.0.0', 8000, app, use_reloader=True)"
   ]
  }
 ],
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