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Posted by Alan J. Flavell on 11/05/84 11:25
On Tue, 30 Aug 2005, d.mears@comcast.net wrote:
> Is there anyway to find what the date of last revision on someone
> else's webpage is?
Any HTTP server may report a last-modified date, which a client agent can
happily inform you about. (But see below for discussion of what it might
mean).
Here's a trivial example, courtesy of Chris Pederick's "web developer
toolbar" for Mozilla/Firefox (which I'd highly recommend to any user of
those browsers, whether or not they consider themselves to be "web
developers" as such):
Date: Tue, 30 Aug 2005 20:44:47 GMT
Server: Apache/1.3.27 (Unix) (Red-Hat/Linux) mod_jk2/2.0.2
Last-Modified: Tue, 30 Aug 2005 01:11:21 GMT
Etag: "47eb8-4ef0-4313b239"
Accept-Ranges: bytes
Content-Length: 20208
Connection: close
Content-Type: text/html
200 OK
Note the "Last-Modified" line - but there are plenty of other ways of
seeing this, for example "lynx -head -dump ..." , or, I think, wget, and I
don't know what else. Even speaking HTTP nicely by hand to the server!
On the other hand, that date/time might or might not have been a
substantive change of the content - perhaps merely a technical update.
The only way to know whether the author thinks s/he made a substantive
change to the content, is if they make a practice of putting that
information onto the page itself. There's no purely technical alternative
to that, I'm afraid.
good luck
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