Dispatcher No Cache and Internet Explorer Error

Forum|Forum|10 years ago
October 16, 2015
7 replies
1996 views

Hi all,

I am using this line of code: <% response.setHeader("Dispatcher", "no-cache"); %> to prevent caching of some pages on my CQ site. This works very well in Chrome but actually causes a 500 Internal Server Error when using IE. Interestingly, even when setting the standard HTTP no-cache headers (below) we see the same behaviour:

<%
response.setHeader("Cache-Control", "no-cache, no-store, must-revalidate"); // HTTP 1.1.
response.setHeader("Pragma", "no-cache"); // HTTP 1.0.
response.setDateHeader("Expires", 0); // Proxies.
%>

Furthermore, even when setting these headers as meta tags, we see the same server response when hitting the page from IE. Please note that we do not see the problem when accessing the site on the Author instance, only the Publisher. Any thoughts as to what I'm doing wrong will be very much appreciated.

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Best answer by Sham_HC

Have you white listed cookie in optout[1] service?

[1] http://localhost:4502/system/console/configMgr/com.adobe.granite.optout.impl.OptOutServiceImpl

J

JustinEd3

Adobe Employee

The server generates a 500 error? Like you see it in the AEM access.log file?

C

courtthreeGDCAuthor

Level 3

Yeah, weird right?

Here's a screen shot of the server's reaction...[img]Screen Shot 2014-09-12 at 19.07.56.png[/img]

J

JustinEd3

Adobe Employee

That's from Apache (I think). Does this also happen if you hit AEM directly (from IE)?

C

courtthreeGDCAuthor

Level 3

Just to add some more context, I have now discovered that the above conflicts with some cookie-based code immediately after it:

<%
response.setHeader("Dispatcher", "no-cache");
%>

<%

// Check for the existence and value of the log-in cookie
Cookie[] cookies = request.getCookies();

// Boolean to use throughout the comp
Boolean REDACTED1 = false;

// Loop over the available cookies and search for the required one

for(Cookie cookie : cookies){
// Check the match
if(null != cookie && cookie.getName().equals("REDACTED") && cookie.getValue().equals("REDACTED")){
REDACTED1 = true;
}
}

%>

If I remove the code inside the for loop, it works. Interestingly, ANY code added inside the for loop causes the breakage.