How to check HTML code in Ruby

Question

I want to check a line of HTML with a ruby script. Specifically I want to tell the status of local mountain biking trails. When the trails are closed, website displays this image:

When the trails are open, this image:

Code from the website ( usnwc.org ):

<div id="trail-status" class="widget widget_tcstatus">      
    <div class="tcwstatus">
        <div class='trails-current'>
            <img src='/wp-content/uploads/2014/10/trailsclosed.png' alt=' Image not found'/>
        </div>      
    </div>
</div>

I could check to see which image is being displayed to return the status. Is there a way to accomplish this in Ruby? Possibly using Net::HTTP ?

Answer 1

You can use open-uri and regexp like below:

require 'open-uri'
content = open('http://urltopage.com/trail-path').read

if content =~ /trailsclosed\.png/
  puts "Trails closed!"
elsif content =~ /trailsopened\.png/
  puts "Trails opened!"
else
  puts "Oops, images not found?" 
end