RE: Tomcat and Internet Explorers caching
Hi, Not an answer as such, but all our dev machines (and we do LOTS of changes per 5 minutes) have Automatically switched on, and we don't experience this problem. Like I say, not a solution, but perhaps you are looking in the wrong direction. Cheers, Allistair. -Original Message- From: Øyvind Johansen [mailto:[EMAIL PROTECTED] Sent: 22 June 2005 11:11 To: 'Tomcat Users List' Subject: Tomcat and Internet Explorers caching Hello! Our web-application uses a combination of JSP-pages and a controller servlet. When viewing these pages with Internet Explorer weird things tend to happen. I found out that if Internet Explorers caching is set to automatic checking for newer versions on the server everything goes wrong. Instead of sending requests to the servlet, IE just simply takes an answer from its cache, and thus presenting the wrong results. When changing the setting to always the problem disappears. Now, telling every user to change this setting would require almost as much work as convincing them that Firefox and/or Opera are much better. So, are there any ways to tell IE that it shouldn't cache my servlet/jsp-pages? Regards, Øyvind Johansen ElectricTimeCar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Tomcat and Internet Explorers caching
You may be right, but I think it's just our weird way of combining jsp/servlets with a magnet card reader that takes IE off guard. Heres a typical example: User uses his user card on our magnet card reader. The reader tells our client (which implements IE through an ActiveX control, dont ask why). The reader creates an URL which sends the card information to a servlet as a parameter. Ie /Servler?paramname=paramval. The servlet handles the request and determines where the users should go (1 page for normal users, another for admins etc). When Automaticly is set, this makes IE return the page of the last user that was successfully using the server (in which IE saved these pages in the cache). This means that user A may get the admin interface even though he isn't an administrator. In the web-application log, nothing happens when this behaviour shows itself. The web-app always logs all user-logins, and the lack of this proves that IE simply isn't sending the request to the server... Did it become clearer? -Opprinnelig melding- Fra: Allistair Crossley [mailto:[EMAIL PROTECTED] Sendt: 22. juni 2005 12:09 Til: Tomcat Users List Emne: RE: Tomcat and Internet Explorers caching Hi, Not an answer as such, but all our dev machines (and we do LOTS of changes per 5 minutes) have Automatically switched on, and we don't experience this problem. Like I say, not a solution, but perhaps you are looking in the wrong direction. Cheers, Allistair. -Original Message- From: Øyvind Johansen [mailto:[EMAIL PROTECTED] Sent: 22 June 2005 11:11 To: 'Tomcat Users List' Subject: Tomcat and Internet Explorers caching Hello! Our web-application uses a combination of JSP-pages and a controller servlet. When viewing these pages with Internet Explorer weird things tend to happen. I found out that if Internet Explorers caching is set to automatic checking for newer versions on the server everything goes wrong. Instead of sending requests to the servlet, IE just simply takes an answer from its cache, and thus presenting the wrong results. When changing the setting to always the problem disappears. Now, telling every user to change this setting would require almost as much work as convincing them that Firefox and/or Opera are much better. So, are there any ways to tell IE that it shouldn't cache my servlet/jsp-pages? Regards, Øyvind Johansen ElectricTimeCar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - 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]
RE: Tomcat and Internet Explorers caching
hi, A solution is after submit clear a User object from the session, than identifies the user and put a User object in a session and always check on every page and action if User object exists in the session. regards, Maarten -Oorspronkelijk bericht- Van: Øyvind Johansen [mailto:[EMAIL PROTECTED] Verzonden: woensdag 22 juni 2005 12:39 Aan: 'Tomcat Users List' Onderwerp: RE: Tomcat and Internet Explorers caching You may be right, but I think it's just our weird way of combining jsp/servlets with a magnet card reader that takes IE off guard. Heres a typical example: User uses his user card on our magnet card reader. The reader tells our client (which implements IE through an ActiveX control, dont ask why). The reader creates an URL which sends the card information to a servlet as a parameter. Ie /Servler?paramname=paramval. The servlet handles the request and determines where the users should go (1 page for normal users, another for admins etc). When Automaticly is set, this makes IE return the page of the last user that was successfully using the server (in which IE saved these pages in the cache). This means that user A may get the admin interface even though he isn't an administrator. In the web-application log, nothing happens when this behaviour shows itself. The web-app always logs all user-logins, and the lack of this proves that IE simply isn't sending the request to the server... Did it become clearer? -Opprinnelig melding- Fra: Allistair Crossley [mailto:[EMAIL PROTECTED] Sendt: 22. juni 2005 12:09 Til: Tomcat Users List Emne: RE: Tomcat and Internet Explorers caching Hi, Not an answer as such, but all our dev machines (and we do LOTS of changes per 5 minutes) have Automatically switched on, and we don't experience this problem. Like I say, not a solution, but perhaps you are looking in the wrong direction. Cheers, Allistair. -Original Message- From: Øyvind Johansen [mailto:[EMAIL PROTECTED] Sent: 22 June 2005 11:11 To: 'Tomcat Users List' Subject: Tomcat and Internet Explorers caching Hello! Our web-application uses a combination of JSP-pages and a controller servlet. When viewing these pages with Internet Explorer weird things tend to happen. I found out that if Internet Explorers caching is set to automatic checking for newer versions on the server everything goes wrong. Instead of sending requests to the servlet, IE just simply takes an answer from its cache, and thus presenting the wrong results. When changing the setting to always the problem disappears. Now, telling every user to change this setting would require almost as much work as convincing them that Firefox and/or Opera are much better. So, are there any ways to tell IE that it shouldn't cache my servlet/jsp-pages? Regards, Øyvind Johansen ElectricTimeCar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] FONT SIZE=1 FACE=VERDANA,ARIAL COLOR=BLUE --- QAS Ltd. Registered in England: No 2582055 Registered in Australia: No 082 851 474 --- /FONT - 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] -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.7.10/25 - Release Date: 21-6-2005 -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.323 / Virus Database: 267.7.10/25 - Release Date: 21-6-2005 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Tomcat and Internet Explorers caching
Hi Øyvind, This works quite well for me. Place the following magic incantation at the *end* of your JSP. Specifically, place it after the closing body tag, but before the closing html tag. In context it looks like this: /body !-- Hack to disable IE caching -- head meta HTTP-EQUIV=PRAGMA CONTENT=NO-CACHE /head !-- end no-cache hack -- /html Why at the end? I dunno. Maybe someone on the list who has the answer on tap would chime in? Hope this helps. ~PST On 6/22/05, Øyvind Johansen [EMAIL PROTECTED] wrote: Hello! Our web-application uses a combination of JSP-pages and a controller servlet. When viewing these pages with Internet Explorer weird things tend to happen. I found out that if Internet Explorers caching is set to automatic checking for newer versions on the server everything goes wrong. Instead of sending requests to the servlet, IE just simply takes an answer from its cache, and thus presenting the wrong results. When changing the setting to always the problem disappears. Now, telling every user to change this setting would require almost as much work as convincing them that Firefox and/or Opera are much better. So, are there any ways to tell IE that it shouldn't cache my servlet/jsp-pages? Regards, Øyvind Johansen ElectricTimeCar - 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]
