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?? recursive.rb(1.73 KB)
?? reloader.rb(2.97 KB)
?? request.rb(12.45 KB)
?? response.rb(4.33 KB)
?? rewindable_input.rb(3.19 KB)
?? runtime.rb(961 B)
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?? server.rb(10.8 KB)
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?? showexceptions.rb(11.7 KB)
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?? tempfile_reaper.rb(670 B)
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?? utils.rb(20.55 KB)

Editing: rewindable_input.rb

# -*- encoding: binary -*-
require 'tempfile'
require 'rack/utils'

module Rack
  # 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.
  class RewindableInput
    def initialize(io)
      @io = io
      @rewindable_io = nil
      @unlinked = false
    end

def gets
      make_rewindable unless @rewindable_io
      @rewindable_io.gets
    end

def read(*args)
      make_rewindable unless @rewindable_io
      @rewindable_io.read(*args)
    end

def each(&block)
      make_rewindable unless @rewindable_io
      @rewindable_io.each(&block)
    end

def rewind
      make_rewindable unless @rewindable_io
      @rewindable_io.rewind
    end

# Closes this RewindableInput object without closing the originally
    # wrapped IO oject. Cleans up any temporary resources that this RewindableInput
    # has created.
    #
    # This method may be called multiple times. It does nothing on subsequent calls.
    def close
      if @rewindable_io
        if @unlinked
          @rewindable_io.close
        else
          @rewindable_io.close!
        end
        @rewindable_io = nil
      end
    end

private

# Ruby's Tempfile class has a bug. Subclass it and fix it.
    class Tempfile < ::Tempfile
      def _close
        @tmpfile.close if @tmpfile
        @data[1] = nil if @data
        @tmpfile = nil
      end
    end

def make_rewindable
      # Buffer all data into a tempfile. Since this tempfile is private to this
      # RewindableInput object, we chmod it so that nobody else can read or write
      # it. On POSIX filesystems we also unlink the file so that it doesn't
      # even have a file entry on the filesystem anymore, though we can still
      # access it because we have the file handle open.
      @rewindable_io = Tempfile.new('RackRewindableInput')
      @rewindable_io.chmod(0000)
      @rewindable_io.set_encoding(Encoding::BINARY) if @rewindable_io.respond_to?(:set_encoding)
      @rewindable_io.binmode
      if filesystem_has_posix_semantics?
        # Use ::File.unlink as 1.9.1 Tempfile has a bug where unlink closes the file!
        ::File.unlink @rewindable_io.path
        raise 'Unlink failed. IO closed.' if @rewindable_io.closed?
        @unlinked = true
      end

buffer = ""
      while @io.read(1024 * 4, buffer)
        entire_buffer_written_out = false
        while !entire_buffer_written_out
          written = @rewindable_io.write(buffer)
          entire_buffer_written_out = written == Rack::Utils.bytesize(buffer)
          if !entire_buffer_written_out
            buffer.slice!(0 .. written - 1)
          end
        end
      end
      @rewindable_io.rewind
    end

def filesystem_has_posix_semantics?
      RUBY_PLATFORM !~ /(mswin|mingw|cygwin|java)/
    end
  end
end

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Editing: rewindable_input.rb

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