require 'open-uri' open 'http://foo_bar.baz.com/'
generic.rb:213:in `initialize': the scheme http does not accept registry part: foo_bar.baz.com (or bad hostname?) (URI::InvalidURIError)
D'oh! This is a valid url, but sometimes URI can be a little bit old-fashioned about what to accept.
The solution? Addressable is a more RFC-conformant replacement for URI. But how to get open-uri and other libs to use it?
After poking around the internet for an hour or so and not coming up with anything I settled on this:
require 'addressable/uri' class URI::Parser def split url a = Addressable::URI::parse url [a.scheme, a.userinfo, a.host, a.port, nil, a.path, nil, a.query, a.fragment] end end open 'http://foo_bar.baz.com/'
Yay! No parse error (obviously the url still won't open because I made it up.)
Notice that I threw away 2 parts of the url, registry and opaque. These are things that addressable doesn't have and I never see anyway so I don't expect it to be a problem.
I'll just start putting this bit of code into all my projects from now on and we'll have to wait and see if it creates any problems.