From: Harold Hausman <hhausman@...>
Date: 2005-11-18T11:47:01+09:00
Subject: Question about begin, rescue, end.

Here's my code. It's dumb:

require 'open-uri'
begin
	while true do
		the_begin_time = Time.now
		open( "http://danceliquid.com/test/public/" ) do |stuff|
			puts stuff.read
		end
		the_wait_time = Time.now - the_begin_time
		the_file = File.new("SitePingLog.txt", "a")
		the_file.puts('Got it in '+ the_wait_time.to_s + ' seconds @ ' +
Time.now.to_s)
		the_file.close
		sleep 600
	end
rescue
		the_file = File.new("SitePingLog.txt", "a")
		the_file.puts(Error @ ' + Time.now.to_s)
		the_file.close
		retry
end

#What it does it hit my site every ten minutes, and keep a log of how
long it took to get the content there. I was having people tell me
that intermittently they wouldn't be able to get to it at all, or
sometimes it would be really slow. This script has proven this to be
true, and in all honesty I'm not too worried about the performance of
my site. My question is, all the open-uri code is inside the begin,
rescue section, and occasionally the rescue, end section gets called,
but also sometimes (infrequently), the whole script bombs out...
here's the error:

c:/ruby/lib/ruby/1.8/timeout.rb:42:in `rbuf_fill': execution expired (Timeout::E
rror)
        from c:/ruby/lib/ruby/1.8/net/protocol.rb:196:in `timeout'
        from c:/ruby/lib/ruby/1.8/timeout.rb:55:in `timeout'
        from c:/ruby/lib/ruby/1.8/net/protocol.rb:196:in `rbuf_fill'
        from c:/ruby/lib/ruby/1.8/net/protocol.rb:160:in `readuntil'
        from c:/ruby/lib/ruby/1.8/net/protocol.rb:171:in `readline'
        from c:/ruby/lib/ruby/1.8/net/http.rb:1554:in `read_status_line'
        from c:/ruby/lib/ruby/1.8/net/http.rb:1538:in `read_new'
        from c:/ruby/lib/ruby/1.8/net/http.rb:833:in `request'
         ... 9 levels...
        from c:/ruby/lib/ruby/1.8/open-uri.rb:134:in `open_uri'
        from c:/ruby/lib/ruby/1.8/open-uri.rb:424:in `open'
        from c:/ruby/lib/ruby/1.8/open-uri.rb:85:in `open'
        from C:/Documents and Settings/Harold/Desktop/scripting/ruby/SitePinger.
rb:5

... Right, so, isin't begin, rescue, end supposed to stop exactly this
from happening? Or chances are, I've misunderstood.

Thanks in advance for your time,
-Harold