Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people, just like you, are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
Solved

clear preflight cache on IE?

Posted on 2013-12-17
11
406 Views
Last Modified: 2014-01-17
Hi Experts,
Can anyone PLEASE tell me how to clear the preflight cache on IE?

Many thanks!
Mike
0
Comment
Question by:thready
  • 5
  • 4
11 Comments
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39725285
Never heard of "preflight cache".  You can clear the normal cache (which is the Temporary Files) in Internet Options on the General tab under Browser History.
0
 
LVL 1

Author Comment

by:thready
ID: 39725461
Preflight cache is a special cache for saving preflight requests.  See http://www.w3.org/TR/cors/
0
 
LVL 83

Accepted Solution

by:
Dave Baldwin earned 500 total points
ID: 39725530
According to this page, it is only related to Cross-Origin Resource Sharing (CORS).  It also says it should be cleared when your regular cache is cleared and that the normal expiration is 30 minutes.

https://developers.google.com/storage/docs/cross-origin
0
Free Tool: Port Scanner

Check which ports are open to the outside world. Helps make sure that your firewall rules are working as intended.

One of a set of tools we are providing to everyone as a way of saying thank you for being a part of the community.

 
LVL 1

Author Comment

by:thready
ID: 39726489
Yes I'm doing preflight requests for CORS.  And the expiration we set was 20 days (it's an option that you can return along with the allow-origin flag).  The site says it "may" clear when you clear your browser cache.  And that's for chrome.  In IE, when you clear cache, you're given very specific items that get cleared and preflight results are not one of them..  It seems that this is definitely not cleared by IE when you clear normal cache...
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39727426
Does your version of IE (?) even support CORS?
0
 
LVL 1

Author Comment

by:thready
ID: 39727456
Yes, CORS is supported on IE 10 and 11...
0
 
LVL 83

Expert Comment

by:Dave Baldwin
ID: 39727518
You're going to have to click on "Request Attention" above.  I don't know enough about this to help you.
0
 
LVL 44

Expert Comment

by:Rainer Jeschor
ID: 39728205
Hi,
just a guess but have you tried the clear cache function from IE11 dev tools?
Have you unvhecked preserve favorites?
0
 
LVL 1

Author Comment

by:thready
ID: 39729108
Just tried removing everything but the kitchen sink.  No luck...
0
 
LVL 1

Author Closing Comment

by:thready
ID: 39788462
Just clearing the browser cache is confirmed to work.  My problem was not because of the preflight cache.  It was just a red herring.
0

Featured Post

Announcing the Most Valuable Experts of 2016

MVEs are more concerned with the satisfaction of those they help than with the considerable points they can earn. They are the types of people you feel privileged to call colleagues. Join us in honoring this amazing group of Experts.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you are a web developer, you would be aware of the <iframe> tag in HTML. The <iframe> stands for inline frame and is used to embed another document within the current HTML document. The embedded document could be even another website.
Not sure what the best email signature size is? Are you worried about email signature image size? Follow this best practice guide.
The viewer will learn how to dynamically set the form action using jQuery.
The viewer will learn how to create and use a small PHP class to apply a watermark to an image. This video shows the viewer the setup for the PHP watermark as well as important coding language. Continue to Part 2 to learn the core code used in creat…

860 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question