class Bundler::Fetcher

def fetch_spec(spec)
  spec = spec - [nil, 'ruby', '']
  spec_file_name = "#{spec.join '-'}.gemspec"
  uri = URI.parse("#{@remote_uri}#{Gem::MARSHAL_SPEC_DIR}#{spec_file_name}.rz")
  if uri.scheme == 'file'
    Bundler.load_marshal Gem.inflate(Gem.read_binary(uri.path))
  elsif cached_spec_path = gemspec_cached_path(spec_file_name)
    Bundler.load_gemspec(cached_spec_path)
  else
    Bundler.load_marshal Gem.inflate(fetch(uri))
  end
rescue MarshalError
  raise HTTPError, "Gemspec #{spec} contained invalid data.\n" \
    "Your network or your gem server is probably having issues right now."
end