A helper class to parse MongoDB connection strings

uri.rb

module MongoDB
  class URI
    attr_reader :uri

    def initialize(uri)
      @uri = uri
    end

    def username
      matches[:username]
    end

    def password
      matches[:password]
    end

    def hosts
      matches[:hosts].split(',')
    end

    def database
      matches[:database]
    end

    def options
      matches[:options]
    end

    private

    def matches
      @matches ||= uri.match(
        %r{
          mongodb://
          (?:
            (?<username> [^:]+) : (?<password> [^@]+) @
          )?
          (?<hosts>
            (?:
              (?: [^:/]+? ) # host name
              (?: : \d+ )?  # port
              ,?
            )+
          )
          (?:
            /(?<database> [^?]+)
          )?
          (?:
            \?(?<options> .+)
          )?
        }x
      )
    end
  end
end