From: Robert Klemme <bob.news@...>
Date: 2003-11-17T10:26:03+09:00
Subject: Re: can't flush print when download open-uri


Maybe it's because you didn't terminate with "\n".

"T. Onoma" <transami@runbox.com> schrieb im Newsbeitrag
news:E1AJs2a-0004hd-RA@odie.runbox.com...
> I'm confused. why won't this print? I tried flushing the $defout and
$stdout as well as the source_file_io, but that doesn't work either.

I'd try $defout.sync=true then you don't need the flushes.

> # download
> prioritized_locations.each do |location|
>   begin
>     source_file_io = File.open(self.source_path,'w')
>     remote_file = open(location)
>     while incoming = remote_file.read(512)
>       source_file_io.write(incoming)
>     # THIS WON'T THIS PRINT!!!!!!!!!!!
>       print "\ca{source_file_io.pos}KB/#{@source_size}KB"

did you mean

print "#{source_file_io.pos}KB/#{@source_size}KB\n"

?

>     end
>   rescue
>     puts "#{location} failed"

>     remote_file.close unless remote_file.nil?
>     source_file_io.close unless source_file_io.nil?

Closing here is superfluous since "ensure" takes care of that.

>     next   # try next location

superfluous as well.

>   else
>     puts ' Done.'
>     break  # we got it

superfluous as well.

>   ensure
>     remote_file.close unless remote_file.nil?
>     source_file_io.close unless source_file_io.nil?
>   end
> end

In the end we get much cleaner code:

require 'open-uri'

# download
$defout.sync = true

prioritized_locations.each do |location|
  begin
    File.open(self.source_path,'w') do |source_file_io|
      open(location) do |remote_file|
        while incoming = remote_file.read(512)
          source_file_io.write(incoming)
          print "#{source_file_io.pos}KB/#{@source_size}KB "
        end
      end
    end
  rescue => e
    $stderr.puts "#{location} failed: #{e}"
  else
    puts 'Done.'
  end
end

This works for me - and does print.

    robert