/gopher · sink: pycurl
Fetcher uses libcurl, which speaks gopher://. A TCP service is listening on 127.0.0.1:6479.
libcurl supports gopher://. The format is gopher://host:port/_<url-encoded-payload>. Try gopher://127.0.0.1:6479/_PING%0d%0a — whatever you send is forwarded verbatim, and the service replies with a flag.