HTTP server that sends incomplete chunks, triggering ChunkedEncodingError in python-requests clients. Reproducer for https://github.com/thp/urlwatch/issues/725

http-serve-incomplete-chunks.py

#!/usr/bin/env python3
"""
Minimal HTTP server that sends incomplete chunks,
triggering ChunkedEncodingError in python-requests clients.

Reproducer for https://github.com/thp/urlwatch/issues/725
"""

from http.server import BaseHTTPRequestHandler, HTTPServer


class SimpleHTTPRequestHandler(BaseHTTPRequestHandler):
    def do_GET(self):
        # Start sending a response with chunked encoding
        self.send_response(200)
        self.send_header('Content-type', 'text/plain')
        self.send_header('Transfer-Encoding', 'chunked')
        self.end_headers()

        # Send a part of the response, but not the entire content
        self.wfile.write(b"8\r\n")
        self.wfile.write(b"This is a \r\n")
        # Not sending the last chunk and closing the connection should
        # trigger ChunkedEncodingError in the client


def run(server_class=HTTPServer, handler_class=SimpleHTTPRequestHandler,
        port=8080):
    server_address = ('', port)
    httpd = server_class(server_address, handler_class)
    print(f"Starting faulty HTTP server on port {port}...")
    httpd.serve_forever()


if __name__ == '__main__':
    run()

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