fetch_path

# File lib/rubygems/remote_fetcher.rb, line 263
  def fetch_path(uri, mtime = nil, head = false)
    uri = URI.parse uri unless URI::Generic === uri

    raise ArgumentError, "bad uri: #{uri}" unless uri

    unless uri.scheme
      raise ArgumentError, "uri scheme is invalid: #{uri.scheme.inspect}"
    end

    data = send "fetch_#{uri.scheme}", uri, mtime, head

    if data and !head and uri.to_s =~ /gz$/
      begin
        data = Gem.gunzip data
      rescue Zlib::GzipFile::Error
        raise FetchError.new("server did not return a valid file", uri.to_s)
      end
    end

    data
  rescue FetchError
    raise
  rescue Timeout::Error
    raise UnknownHostError.new('timed out', uri.to_s)
  rescue IOError, SocketError, SystemCallError => e
    if e.message =~ /getaddrinfo/
      raise UnknownHostError.new('no such name', uri.to_s)
    else
      raise FetchError.new("#{e.class}: #{e}", uri.to_s)
    end
  end