fpassthru

• The fpassthru function in PHP reads all data remaining on a stream resource and sends it to the output buffer.

  PHP

  $f = fopen('/path/to/foobar');
  passthru($f);
  fclose($f);

  Ruby does not have an equivalent method. If the file is relatively small, you can read the entire file with File.read and then print it.

  Ruby

  STDOUT.write File.read('/path/to/foobar')

  For larger files, you might want to read the file in chunks to avoid loading the entire file into memory.

  Ruby

  File.open('/path/to/foobar', 'r') do |f|
    STDOUT.write(f.read(8192)) until f.eof
  end

  ActionController

  The examples above assume a standalone Ruby environment. Within the context of the Rails framework, you can render a file from a controller action using the render method.

  Rails

  class DemoController < ApplicationController
    def index
      render :file => '/path/to/foobar'
    end
  end

  see also

  • readfile
  • fopen
  • popen
  • fsockopen

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