Stopping A Proxy From Cache Your
The Emirates Internet (EIM) proxy in the
UAE (United Arab Emirates) caches webpages that are requested
through it, and this can become
a problem for webmasters who have content that is continuously
updated. I had a page which was updated each week, but
the emirates proxy was displaying a month old version of
webpage, even though I was clicking the reload button in
my browser. So below you can find guidelines on means of
emirates proxy or any proxy
cache your webpages.
To tell a proxy not to cache a webpage
can be achieved by using the Cache-Control HTTP
header and setting it to 'private'. If it is set to 'no-cache',
then the proxy and the user's browser will not cache the
page. Because the HTTP/1.0 specifications do not recognize
the Cache-Control HTTP
header, it is good to also use the
Pragma HTTP header
to specify that a webpage shouldn't be cached. Below you
can find out how to send the HTTP
headers either in
before sending the html portion of a webpage.
Response.AddHeader "Cache-Control", "private"
Response.AddHeader "Pragma", "no-cache"
For those who don't use PHP or ASP, they
can use the following meta tag to send the same headers.
<meta http-equiv="Pragma" content="no-cache">
If a page is cached in the emirates proxy
and you want to refresh it, I have found that the Opera browser
can make the emirates proxy refresh its cached file.
If you have it installed, simply visit the webpage and the
proxy cached webpage should appear. Click the reload
button and the new webpage will be display. I have checked,
but unfortunately Internet Explorer is unable to refresh
the cached file. Opera does the refreshing by sending
the HTTP_CACHE_CONTROL HTTP
header equal to 'no-cache, max-stale=0' to the proxy.