# File lib/aws/s3/s3_object.rb, line 1244 def url_for(method, options = {}) options = options.dup options[:expires] = expiration_timestamp(options[:expires]) options[:secure] = config.use_ssl? unless options.key?(:secure) options[:signature_version] ||= config.s3_signature_version case options[:signature_version] when :v3 then presign_v3(method, options) when :v4 then presign_v4(method, options) else msg = "invalid signature version, expected :v3 or :v4, got " msg << options[:signature_version].inspect raise ArgumentError, msg end end