Send the Last-Modified HTTP header from your web application and check for a If-Modified-Since request header. If you detect that the client has a fresh version of the feed, respond with a 304 (Not Modified) code.
-- Edgar Dave wrote: > Is there a way that NewsReader knows whether a page has been updated? How? > the page is dynamic collecting data from database. > Thanks! > > Santosh Puranshettiwar <[EMAIL PROTECTED]> wrote: > Dave wrote: > >> Thanks, >> >> It semms that it is easy to write the XML file for a Feed. But how >> does NewsReader know the page (pointed by feed link) has been changed, >> what are the changes, updated time? >> >> I have not got the idea yet :) >> >> > The NewsReader /polls/ the feed regularly. > As such there is no mechanism for notifying changes. > >> Dave >> >> >> Michael Hencin wrote: Dave >> >> I went thru the same thing. Basically all you need to do is make an XML file >> and put it on a web server some place. Then provide the link. People can >> copy the link and paste it into any rss reader, or if their browser >> understands what to do, it will add the rss feed link to the integrated >> reader. >> >> So you need to create the XML file, save that file to your web server. Then >> provide a link for people to use. >> >> Here are some links I came by >> >> http://searchenginewatch.com/showPage.html?page=2175271 >> >> >> http://en.wikipedia.org/wiki/RSS_%28file_format%29 >> >> Mike >> >> >> -----Original Message----- >> From: Dave [mailto:[EMAIL PROTECTED] >> Sent: Saturday, November 18, 2006 2:21 AM >> To: users@myfaces.apache.org; Tomcat Users List >> Subject: RSS help >> >> How to support RSS in a website so that people can subscribe? I googled and >> found lots of documents about how to subscribe and about news readers, but >> not talking about how to support RSS functionality in a website? >> >> Thanks, >> Dave >> >> >> --------------------------------- >> Sponsored Link >> >> Mortgage rates as low as 4.625% - $150,000 loan for $579 a month. >> Intro-*Terms >> >> >> --------------------------------------------------------------------- >> To start a new topic, e-mail: users@tomcat.apache.org >> To unsubscribe, e-mail: [EMAIL PROTECTED] >> For additional commands, e-mail: [EMAIL PROTECTED] >> >> >> >> >> --------------------------------- >> Sponsored Link >> >> Mortgage rates near 39yr lows. $420,000 Mortgage for $1,399/mo - Calculate >> new house payment >> >> > > Also, I wonder how this question pertains to this mailing list? > > --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
