Is there a tool for measuring content freshness?
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i.e. crawling a site to identify last date of new or changed content? Thanks.
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Many sites will have "Modified Since Http Header" enabled. If so, then when looking at a page you want to check, type this into your address bar:
javascript:alert(document.lastModified)
But that won't work on all sites as some may disallow javascript execution in that manner. But also if it's a dynamic site and the web owner hasn't configured their Modified Since Http Header properly, then you'll get incorrect dates anyway.
You can see if a website has the Modified Since Http Header enabled:
http://www.hscripts.com/tools/if-modified-since/index.php
You can use the internet archive to look at previous versions of a website (unless they've disallowed this in the .htaccess):
A cool tool I use to alert me to when a competitor (or any website) content is updated is:
http://www.changedetection.com
Enjoy
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