Thanks a lot guys. Certainly I misunderstood. Samit Paul
-----Original Message----- From: MW Janssen [mailto:[EMAIL PROTECTED] Sent: Wednesday, November 02, 2005 2:51 AM To: 'Tomcat Users List' Subject: RE: Tomcat 5.5.12 Refresh/Cache problem that's what i meant. regards. -----Oorspronkelijk bericht----- Van: Stephan van Loendersloot [mailto:[EMAIL PROTECTED] Verzonden: woensdag 2 november 2005 4:39 Aan: Tomcat Users List Onderwerp: Re: Tomcat 5.5.12 Refresh/Cache problem Samit Paul wrote: > Arlene, > Thanks for the reply. My file is a PNG file. Can you tell me where can > I put this piece of code. > Thanks, > > Samit Paul > > -----Original Message----- > From: Arlene Milgram [mailto:[EMAIL PROTECTED] > Sent: Tuesday, November 01, 2005 8:20 AM > To: users@tomcat.apache.org > Subject: RE: Tomcat 5.5.12 Refresh/Cache problem > > > /** Turn on caching: expire in one hour > * @param response The Http Response. > */ > public static void setHeadersCacheOn( HttpServletResponse response ){ > java.util.Calendar expireDate = java.util.Calendar.getInstance(); > expireDate.add(java.util.Calendar.SECOND, 30 ); > response.setDateHeader("Expires", expireDate.getTime().getTime()); > response.setHeader("Cache-Control","public,store,cache"); > response.setHeader("Pragma","cache"); > } > > -----Original Message----- > From: Samit Paul [mailto:[EMAIL PROTECTED] > Sent: Monday, October 31, 2005 8:17 PM > To: users@tomcat.apache.org > Subject: Tomcat 5.5.12 Refresh/Cache problem > > Can somebody tell me what configuration parameter I need to set to get > rid of page not refreshing. > I have a png image a.png . When I browse from IE it shows me the image > properly. Now I put a different image but with the same name a.png. > Event if I press the browser refresh button , it still does not > refresh the image. <SNIP> The problem you describe is on a per-browser-per-user-basis, so they will not work effectively. In IE for example, you can set the caching through the menu Tools -> Internet Options -> General and under 'Temporary Internet Files', click Settings, then under 'Check for newer versions of stored pages content', select 'Every visit to the page'. Also you can set the number of megabytes to use for caching to 1Mb. As said, this totally leaves you up to the visitor's browser settings. Other suggested options are to add a number of meta-tags or response-headers like 'Expires', 'Cache-Control', 'Pragma->No-Cache->No-Store', 'Cache-Control->pre-check->post-check' to your pages. However, the interpretation of these things, *again* differs per browser implementation per user and per HTTP protocol version these things were originally designed for. This has nothing to do with Tomcat or any other webserver. Some of the meta-tags and response-headers mentioned above even have an unreliable effect on the browsers 'Back'-button and on search-engines. The most reliable way I have found is to simply take Maarten Janssens's advice: <img src="mypicture.jpg?ms=1130901624937"> or even: <img src="mypicture.jpg?1130901624937"> Where the value '1130901624937' is the current time in milliseconds. Maybe you didn't understand his reply and you thought something like: <img src="1130901624937.jpg"> This would indeed leave you with strange duplicate files. The trick is to use the time as a parameter appended to the filename, so you can keep the name your original image. HTH, --Stephan. --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.6/152 - Release Date: 31-10-2005 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.362 / Virus Database: 267.12.7/155 - Release Date: 1-11-2005 --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] --------------------------------------------------------------------- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
