Golang net Dial user:pass@ip:port gives: no such host

Question

I'm trying to connect to a proxy server to start an HTTP CONNECT tunnel. The proxy server uses authentication. This code however fails to work:

conn, err := net.Dial("tcp", "[user:[email protected]]:5555")

Even though the host exists, I get an error:

"dial tcp: lookup user:[email protected]: no such host"

The string format I'm using was described in this post. Can't seem to get it to work though. https://stackoverflow.com/a/8858209/6767074

Basic authentication for the proxy server. Without it I get an '407 Proxy Authentication Required' response. — Pieterjan Lambein
– Pieterjan Lambein, Commented Oct 14, 2016 at 13:32
tcp doesn't know about basic auth and doesn't care either, you need to use a http-client for that. — tkausl
– tkausl, Commented Oct 14, 2016 at 13:32
Yes, to the http-connection (or to whoever handles the proxy-connection, I don't know much about the proxy protocol) — tkausl
– tkausl, Commented Oct 14, 2016 at 13:41

Pieterjan Lambein · Accepted Answer · 2016-10-17 12:23:23Z

1

I eventually found the problem. The net.Dial() method wasn't the one concerned with proxy authentication.

I just had to fill in the "Proxy-Authorization" header of the request before calling for am HTTP response. So my TCP address became:

conn, err := net.Dial("tcp", "111.222.333.444:5555")

answered Oct 17, 2016 at 12:23

Pieterjan Lambein

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