method
send_file_headers!
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Class: DataStreaming
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send_file_headers!(options)
private
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# File actionpack/lib/action_controller/metal/data_streaming.rb, line 116 def send_file_headers!(options) type_provided = options.has_key?(:type) options.update(DEFAULT_SEND_FILE_OPTIONS.merge(options)) [:type, :disposition].each do |arg| raise ArgumentError, ":#{arg} option required" if options[arg].nil? end disposition = options[:disposition] disposition += %(; filename="#{options[:filename]}") if options[:filename] content_type = options[:type] if content_type.is_a?(Symbol) extension = Mime[content_type] raise ArgumentError, "Unknown MIME type #{options[:type]}" unless extension self.content_type = extension else if !type_provided && options[:filename] # If type wasn't provided, try guessing from file extension. content_type = Mime::Type.lookup_by_extension(File.extname(options[:filename]).downcase.tr('.','')) || content_type end self.content_type = content_type end headers.merge!( 'Content-Disposition' => disposition, 'Content-Transfer-Encoding' => 'binary' ) response.sending_file = true # Fix a problem with IE 6.0 on opening downloaded files: # If Cache-Control: no-cache is set (which Rails does by default), # IE removes the file it just downloaded from its cache immediately # after it displays the "open/save" dialog, which means that if you # hit "open" the file isn't there anymore when the application that # is called for handling the download is run, so let's workaround that response.cache_control[:public] ||= false end