From: Robert Klemme <shortcutter@...>
Date: 2010-07-20T16:16:23+09:00
Subject: Re: how to judge web exists or not with open-uri?

2010/7/20 Pen Ttt <myocean135@yahoo.cn>:
> would you mind to tell me how to fix it, to make the following program
> to run?
> require 'rubygems'
> require 'open-uri'
> url="www.123.com"
> open(url){|file| if url don't exists then puts "url don't exists"
> else puts "url exists"}

You better use Net::HTTP for this
http://www.ruby-doc.org/stdlib/libdoc/net/http/rdoc/index.html

url = URI.parse('www.123.com')
status = Net::HTTP.start(url.host, url.port) {|http|
  http.head(url.path)
}

puts( /^2/ =~ status.code ? "ok" : "nok" )

Kind regards

robert

-- 
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