I tried out on Netscape 4.7 and IE 5.0. None of them send the If-Modified
Header.
The headers sent by netscape 4.7 are as under
header Accept ===== */*
header Accept-Language ===== en-us
header Accept-Encoding ===== gzip, deflate
header User-Agent ===== Mozilla/4.0 (compatible; MSIE 5.01; Windows NT)
header Host ===== www.nitin.com:8080
header Connection ===== Keep-Alive
header Cookie ===== newd=0; jwssessionid=VWR2DKYAAAACRQFIGJGAAAA
----- Original Message -----
From: "Christopher K. St. John" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, September 18, 2000 5:53 PM
Subject: Re: 'If-Modified-Since' Header
> Nitin Khattar wrote:
> >
> > However i checked up all the request headers sent by IE5.0 and
> > Netscape 4.7 as well as Opera but none of these browsers sent the header
> > 'If-Modified-Since'.
> >
> > Can you tell me why? and secondly does this mean that the
getLastModified()
> > of the HttpServlet will be of no use for such cases?
> >
>
> Congratulations for actually checking on this, most people just
> take for granted that the docs are correct, and often encounter
> nasty suprises when they aren't.
>
> But ... it looks like there might have been a flaw in your
> experimental method, because Netscape definitely does send
> If-Modified-Since. How are you checking the request headers?
> This request is from Netscape 4.73, but the other browsers you
> mentioned are probably sending If-Modified-Since too:
>
> GET http://.../homepage/ HTTP/1.0
> If-Modified-Since: Fri, 28 Apr 2000 05:06:09 GMT; length=2776
> Proxy-Connection: Keep-Alive
> User-Agent: Mozilla/4.73 [en]
> Pragma: no-cache
> Host: echidna:8080
> Accept: image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, ...
> Accept-Encoding: gzip
> Accept-Language: en
> Accept-Charset: iso-8859-1,*,utf-8
>
> Note that it wouldn't make sense to send If-Modified-Since
> on the first request, or any other time when the document isn't
> in the browser's local cache, it only gets sent on a reload or
> revisit a page. Also, you might check your browser's preferences
> under the "Cache" heading...
>
>
> -cks
>
>
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