Stopping IE Using A Cached ASP Page
This problem is regarding ASP/AJAX. I don't really want to bore you with all the code so i will start off by giving an overview of the problem.
I have an ASP page that places an AJAX request to an ASP page that retrieves a random record from the database, the information returned is then updated into a Div on the original page. The original page has a Refresh link to repeat the procedure and select another random database entry. With me so far?
In firefox this works perfectly, but im having problems in IE. It seems that the ASP page that accesses the database is cached somehow as everytime i use the refresh link it returns the same data. I have used the time() function in the returned data so I can see that it is exactly the same info returned with each refresh.
It seems that the response is being cached and rather than rerunning the script the cache is being returned.
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Is there an effective way to stop pages from being cached?
I've created several websites that have dynamic content and images that are managed by a client. The images are named according to the "id" generated via an Identity column of their corresponding database record (ex: 1058.jpg). The problem occurs when the client tries to change the image.
The client gets understandly confused because the old image is still displayed, due to the browser caching the image. How can I force the browser to stop caching the page/image?
All of the ASP pages already have the following:
<%Response.Expires = -1%>
<meta http-equiv="expires" content="0">
<meta http-equiv="pragma" content="no-cache">
Any ideas?
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Is there a way to disallow a page from being cached? I'm about to
introduce functionality that will not work properly if the person uses
the 'BACK' button on their browser and would like to ensure that they
cannot. I tried using <% response.expires = -1 %> thinking that it would
work, however it only ensures that another request has to be sent to the
server. Any ideas other than simply giving the user a message NOT to
use the back button?
Here's a link to the functionality. It uses session variables to produce
a dynamic rate quote. (Tip use WDW in the Description/Keyword search).
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I want to be able to return to a search results page without having to reload the page after having followed a link from one of the results. Would a search results pages generated by asp be cached, and is it possible to direct the browser to load quickly from the cach rather than slowly from the server.
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I have a page requesting content from another via XMLHTTP object. The returned page is returning cached data and I can't get it to stop.
I'm running IIS on a Win2k Server. I've done nothing to setup page caching, etc.
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I have three asp pages. The initial page is login.asp, it goes to page hello.asp. And hello.asp goes to page another.asp. If it goes back from hello.asp to login.asp, then in Internet Explorer, clicking on Back, the cache of the page hello.asp has been removed, which is the effect that I want.
If it goes back from another.asp to login.asp, and then in Internet Explorer, clicking on Back, the page another.asp still remains. Code:
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I have three asp pages. The initial page is login.asp, it goes to page hello.asp. And hello.asp goes to page another.asp.
If it goes back from hello.asp to login.asp, then in Internet Explorer, clicking on Back, the cache of the page hello.asp has been removed, which is the effect that I want. If it goes back from another.asp to login.asp, and then in Internet Explorer, clicking on Back, the page another.asp still remains. Code:
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I have 3 pages. on page 1 there is a select box, name="UD", containing "Data B"
page1 submits to page 2
on page 2, <% USD=request("UD")%> results in USD = "Data B"
USD displays in a text box as "Data" (the space and B missing)
page 2 submits to page 3
on page 3, <% USD=request("USD")%> results in USR = "Data" (the space and B
missing)
How do I keep the data complete?
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I have a few reports that grabs +- 27 000 records from a database, does a few calculations and queries on them, and then writes the results to a text file. As you can imagine, this does take a while (half an hour if the server isn't busy) and hammers the servers resources.
I sometimes realise (after I've started the page) that I made an error in my code, or that another report is more important at the moment. The only way to stop the page if something like this happens, is to bounce the server (even closing my browser doesn't work) - which won't make me very popular .
Is it possible (at all) to stop the execution of the page after it has been started? (I know that ASP is executed on the server, and only the results are sent through, but doesn't it have some sort of event handling?
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I have this asp screen (not .net just asp) where user can fill in report criteria and then when they hit the "Go" button, at which point the report page will be displayed. Sometimes the reports are quite big and may take 2 to 3 minutes to complete.
If the user realizes he makes a mistake as soon as he gets to the report page, he may hit the "Stop" button and think the server has stopped generating the report, but it's not true. The server is still running the process.
This is particularly more obvious for developers like myself cos I have the server installed on my workstation. When I hit the Stop button and then back to the report filter page and make some changes and then hit the Go again, it'll take 2 to 3 minutes before it'll show the report page this time, as if the server was trying to complete my last report first, before processing my current new request.
Question I have therefore, is, if I'm running a long server process, then how I can get the server to stop this thread (or process?) when the user hits the Stop button, or hits the Back button?
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Should I really be putting some form of expiry command at the head of each of these pages if I don't want casual users to see them? I use Classic ASP so is it better to use a command via this lang or the old META methods?
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We encountered a very strange problem. We host a web site:
www.[our_site].com and a large number of our users belong to an
organization group with central network control and they can only
access our web site through two headquarter proxy servers: x.x.a.7 and
x.x.b.8, which was set in security dept of the group headquarter. The
web site was working fine till recently when those user accessing via
x.x.a.7 all have problem suddently while those accessing via x.x.b.8
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page, very slow response, hang on some page or encounter errors, etc.
If they access the same site via another alias, like
www2.[our_site].com which points to the same web server, they will not
have any problem. They do not have problem to access any other web
sites we tried, including our other web sites hosting in the same site,
even the same server. If the users change their ie setting to use other
public proxy server, they will have no problem to access our site.
Strict security policy are applied to the user site, so we cannot ping,
tracert or do any other network testing from user machine. Since user
has no problem to access any other web site, the headquarter security
department wont handle our case and simply think it is our problem.
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I have recently changed web hosts, and am suddenly having the problem that IE is displaying cached ASP pages, i.e. displaying data base query results from the first assembly of the asp page. Surely this contravenes the whole principleof ASP as a dynamically generated page. I didnt get the problem with my previous host.
What am I to do about this? If it is browser dependent, how can I be sure that all users have their browsers set correctly. If it is a host problem, it would be good to have some idea what the problem is before contacting them. Or is there something I can do within my asp page to ensure that the current page is the one displayed by the browser?
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I searched the forum and got the following code from someone who posted it in 2002. However I can't seem to get it to work in my asp page. Can someone confirm the syntax for me? I would like to try and put it in an include file rather, but need to get it to work first.
Response.ExpiresAbsolute = #1/1/1980#
Response.AddHeader "cache-control", "no-store, must-revalidate, private"
Response.AddHeader "Pragma", "no-cache"
Response.Buffer = True
Regards
Ronel
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<!--it is requested from "Application_Form.asp, do something-->
<%else%>
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This is my coding:
window.opener.location.reload(); window.close();
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I have tried:
1. window.opener.location = window.opener.location
2. window.opener.history.go(0)
But as i carry some data from previous previous page, when i use (window.opener.location = window.opener.location), it can't capture my data as it just load the page. It will pop up error as no data captured :
Microsoft VBScript runtime error '800a000d'
Type mismatch: '[string: ""]'
Any suggestion?
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