Cached Images and Bandwidth
Printed From: Web Wiz Forums
Category: General Discussion
Forum Name: General Discussion
Forum Description: General discussion and chat on any topic.
URL: https://forums.webwiz.net/forum_posts.asp?TID=22125
Printed Date: 29 March 2026 at 11:45pm
Software Version: Web Wiz Forums 12.08 - https://www.webwizforums.com
Topic: Cached Images and Bandwidth
Posted By: ctscott
Subject: Cached Images and Bandwidth
Date Posted: 05 December 2006 at 2:32pm
|
Does anyone know if an image that is cached in a browser is still sent by the Server to the browser or is bandwidth preserved by not requesting the image from the server? If that makes any sense. ------------- ______________________ http://www.cfbtrivia.com" rel="nofollow - College Football Trivia |
Replies:
Posted By: Mikey
Date Posted: 05 December 2006 at 2:40pm
|
I've always assumed that the browser checks to see if there is a cached version of the image first and if there is it uses that, thus saving time and bandwidth
------------- Handyman man? |
Posted By: Gullanian
Date Posted: 06 December 2006 at 12:54am
| Yup. All images on pages are external to each page, so the browser looks for a cache of each one and doesn't bother requesting it if it has one unless of course it meets some sort of criteria such as "old enough to look again". |
Posted By: ctscott
Date Posted: 06 December 2006 at 3:01pm
|
do you think any of the following would change it to re-pull from the server?
Response.ExpiresAbsolute = Now() - 2
Response.AddHeader "pragma","no-cache"
Response.AddHeader "cache-control","private"
Response.CacheControl = "private"
say no because i like your answer.  ------------- ______________________ http://www.cfbtrivia.com" rel="nofollow - College Football Trivia |
Posted By: scottage
Date Posted: 09 January 2007 at 4:02pm
|
Adding response expires, etc. will only affect HTML caching, Images are loaded as an external resource so the browser will look in its local cache, if it isn't there it will request it from the source. If you're have a real issue then look at a caching server or caching service ------------- http://www.realwebdevelopers.com" rel="nofollow - Developing real world websites |