Please support `--listen /some/unix.sock` on HTTP

[leonerd]

When running a FastCGI responder, we can simply

$ plackup -s FCGI --listen /some/path/to/unix.sock

to have it listen on a UNIX socket. The same is not true for the HTTP version:

$ plackup --listen /some/path/to/unix.sock
HTTP::Server::PSGI: Accepting connections at http://0:8080/

This then ends up binding to TCP port 8080, and not the UNIX path.

It'd be great to be able to support UNIX-hosted HTTP responders on fixed paths.

[skaji]

You may want to look at other PSGI servers, such as Starlet:

❯ plackup -s Starlet --listen unix.sock  -e 'sub { [200, [], ["ok"]] }'
Plack::Handler::Starlet: Accepting connections at http://0:unix.sock/

[leonerd]

Also while there, don't forget to additionally account for chmod, the same issue as miyagawa/Starman#145