Async::HTTP::Endpoint#address fails with NoMethodError

[paddor]

I'm integrating async-debug (it's awesome) and wanted to log the endpoint address. On Async::HTTP::Endpoint I found #url (what I'm probably conna use) and #address.

Calling #address causes a NoMethodError because IO::Endpoint::HostEndpoint#address doesn't exist.

Maybe that's supposed to be, maybe not. Just wanted to let you know.

[paddor]

Reproduction:

require 'bundler/inline'

gemfile do
  source 'https://rubygems.org'
  gem 'async'
  gem 'async-debug'
end

Async do
  endpoint = Async::HTTP::Endpoint.parse "http://localhost:3001"

  Console.info "Serving live debugger at #{endpoint.url}"
  Console.info "Serving live debugger at #{endpoint.address}" #=> NoMethodError

  Async::Debug.serve endpoint: endpoint 
end

Output:

$ ruby issue_167.rb
  0.0s     info: Serving live debugger at http://localhost:3001/ [ec=0x318] [pid=2640979] [2025-01-14 18:00:27 +0100]
  0.0s     warn: Async::Task [oid=0x320] [ec=0x318] [pid=2640979] [2025-01-14 18:00:27 +0100]
               | Task may have ended with unhandled exception.
               |   NoMethodError: undefined method 'address' for an instance of IO::Endpoint::HostEndpoint (NoMethodError)
               |
               |                                endpoint.address
               |                                        ^^^^^^^^
               |   → /home/user/.gem/ruby/3.4.1/gems/async-http-0.86.0/lib/async/http/endpoint.rb:106 in 'Async::HTTP::Endpoint#address'
               |     issue_167.rb:13 in 'block in <main>'
               |     /home/user/.gem/ruby/3.4.1/gems/async-2.21.1/lib/async/task.rb:197 in 'block in Async::Task#run'
               |     /home/user/.gem/ruby/3.4.1/gems/async-2.21.1/lib/async/task.rb:435 in 'block in Async::Task#schedule'

[ioquatix]

A host endpoint is primarily based on a host name (string) and service name (string or integer). It does not have an address until we connect or bind, and the symbolic hostname is mapped to an actual socket address. Therefore, #address does not exist.

Instead, you could use #to_s, #inspect or more specifically, #specification.

[paddor]

Oh, that makes sense. Thank you.