Re: 'Age' for webpages
Aryeh Gregor <[email protected]> Mon, 7 Jun 2010 16:09:30 -0400
| Newsgroups | gmane.comp.web.html.general |
|---|---|
| Message-ID | <[email protected]> |
On Mon, Jun 7, 2010 at 2:11 AM, Merin Tresa Willy <[email protected]> wrote: > What about dynamic HTML pages? Is there any mechanism for retrieving the age > of their contents? Both Last-Modified and <time pubdate> can be used by dynamic HTML pages. If a page doesn't use either of those, there's no way to tell except guessing. Google guesses how old pages are based on their contents to allow filtering by date, for example, but it's wrong sometimes. On Mon, Jun 7, 2010 at 3:27 AM, David Woolley <[email protected]> wrote: > Competently produced dynamic web content (not just HTML) has a dynamically > generated Last-Modified header. Last-Modified headers are not required by HTTP. They're often meaningless on dynamic pages, where some parts of the page might change every few minutes, and competent authors omit them when they don't make sense.