class Rack::RewindableInput

Class which can make any IO object rewindable, including non-rewindable ones. It does this by buffering the data into a tempfile, which is rewindable.

rack.input is required to be rewindable, so if your input stream IO is non-rewindable by nature (e.g. a pipe or a socket) then you can wrap it in an object of this class to easily make it rewindable.

Don’t forget to call close when you’re done. This frees up temporary resources that RewindableInput uses, though it does not close the original IO object.

Public Class Methods

new (io)

Source

# File lib/rack/rewindable_input.rb, line 16
def initialize(io)
  @io = io
  @rewindable_io = nil
  @unlinked = false
end

Public Instance Methods

close ()

Source

# File lib/rack/rewindable_input.rb, line 47
def close
  if @rewindable_io
    if @unlinked
      @rewindable_io.close
    else
      @rewindable_io.close!
    end
    @rewindable_io = nil
  end
end

Closes this RewindableInput object without closing the originally wrapped IO object. Cleans up any temporary resources that this RewindableInput has created.

This method may be called multiple times. It does nothing on subsequent calls.

each (&block)

Source

# File lib/rack/rewindable_input.rb, line 32
def each(&block)
  make_rewindable unless @rewindable_io
  @rewindable_io.each(&block)
end

gets ()

Source

# File lib/rack/rewindable_input.rb, line 22
def gets
  make_rewindable unless @rewindable_io
  @rewindable_io.gets
end

read (*args)

Source

# File lib/rack/rewindable_input.rb, line 27
def read(*args)
  make_rewindable unless @rewindable_io
  @rewindable_io.read(*args)
end

rewind ()

Source

# File lib/rack/rewindable_input.rb, line 37
def rewind
  make_rewindable unless @rewindable_io
  @rewindable_io.rewind
end