Bug #9912: URI#to_s with an empty host formats the string incorrectly

• Status: Closed
• Assignee: naruse (Yui NARUSE)
• Target version: -
• ruby -v: ruby 2.1.2p95 (2014-05-08 revision 45877) [x86_64-linux]
• Backport: 2.0.0: UNKNOWN, 2.1: UNKNOWN

[deafbybeheading (Maciek Sakrejda)]

maciek@gamera:~$ ruby -e "puts URI.parse('postgres:///foo').to_s"
postgres:/foo

The string of the formatted URI should be 'postgres:///foo'.

Postgres uses empty-host URIs to indicate a Unix socket connection should be used instead of a TCP connection (which is used if you specify 'localhost' as host), so this can be very useful.

[nagachika (Tomoyuki Chikanaga)]

• Status changed from Open to Assigned
• Assignee set to naruse (Yui NARUSE)

[naruse (Yui NARUSE)]

• Status changed from Assigned to Closed

Fixed it at r60970.

[duerst (Martin Dürst)]

[I wrote this directly to ruby-core because I didn't see the issue, but want to make sure it's in the right place.]

The "postgres:" URI scheme isn't even mentioned in the registry at https://www.iana.org/assignments/uri-schemes/uri-schemes.xhtml, so I'm not really sure we should deal with it in a special way.

In more general terms, creating exceptions for schemes is a bad idea, even if it may look like a good idea.