How does IE decide if something is cached?

  • Thread starter Thread starter Ikke
  • Start date Start date
I

Ikke

Hi everybody,

I'd like to know how IE (or other browsers) knows whether or not something
(fi an image) is cached or not. Does it work via url?

For example, I go to www.whateverdomain.com/whateverpage which has an image
on it. The image will be cached.

If I visit another page on that same site, which loads the same image but
via another url, will it be pulled from the cache or downloaded again?

I'd really appreciate it if anybody could answer this question, or point me
towards a link with more info.

Thanks in advance,

Ikke
 
Yes, I would like to know also. That's an important bit of information. It
would really make my day to know that! I have laid awake at night pondering
this most important bit of trivia...
 
Hi Ikke,

Yes it does depend upon the url. When you open the TIF (Temporary Internet
Files) folder to view your cache you will see that each file has a Source
URL attribute which uniquely identifies each file that has been downloaded
from the server to the client cache.

It also depends upon your Internet Settings for Temp Files (General tab of
Internet Options) eg. a setting of "check for newer versions each time the
page is opened" will do exactly that.

Regards.
 
Yes, I would like to know also. That's an important bit of
information. It would really make my day to know that! I have laid
awake at night pondering this most important bit of trivia...
Click to expand...

Maybe when you operate a site that needs several hundred GB in bandwidth
each month like me, you would really care about caching...

Oh, and by the way:
A: Because it's annoying to read.
Q: Why is top-posting bad?

Ikke
 
Hi Ikke,

Yes it does depend upon the url. When you open the TIF (Temporary
Internet Files) folder to view your cache you will see that each file
has a Source URL attribute which uniquely identifies each file that
has been downloaded from the server to the client cache.

It also depends upon your Internet Settings for Temp Files (General
tab of Internet Options) eg. a setting of "check for newer versions
each time the page is opened" will do exactly that.

Regards.
Click to expand...

Thanks for the information - I've been asked to find a new way of storing
information on our webserver, but everything needs to be kept in dated
folders, which are later translated to URLs.

That would mean that the URL will change on later requests, therefor
eliminating the user's cache (as per your description).

Oh well, back to the drawing board as they say :)

Thanks again,

Ikke
 
Ikke,

Sorry, I was thinking too narrow on my post. I couldn't imagine how any user
could care.

As for top posting or bottom posting. For a long time, I bottom posted. Then
someone complained about that, so I switched. I have read the MVP Good Post
and there is no mention of top or bottom posting:
http://www.dts-l.org/goodpost.htm
 
Ikke,

Sorry, I was thinking too narrow on my post. I couldn't imagine how
any user could care.
Click to expand...

No problem. I shouldn't have commented on your posting style either.

Best regards,

Ikke
 
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