IE image caching: performance issue during ajax updates
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Key: WICKET-1858
URL: https://issues.apache.org/jira/browse/WICKET-1858
Project: Wicket
Issue Type: Improvement
Components: wicket
Affects Versions: 1.4-M3
Environment: IE 6
Reporter: Sergey Derugo
Priority: Critical
Steps to reproduce:
1. Create table(let's say 50 rows) using any repeater.
2. Add AjaxButton to each row, for example: <img src="../images/edit.gif"
wicket:id="editButton" alt="Edit"/> - when user clicks on this button - the
application also refreshes the entire table.
3. Since IE cannot cache images during AJAX updates it will take more time to
re-load all images.
Ajax AjaxRequestTarget turns off caching (i.e. sets header "Cache-Control" to
"no-cache") as the result the browser must send many requests to the server.
See details here http://www.bazon.net/mishoo/articles.epl?art_id=958
Workaround:
Create Filter that will override the caching *only* for images, for example: if
URL matches *.gif then the filter will set Cache-Control :
public,max-age=2592000,post-check=2592000,pre-check=2592000
Possible solution:
Wicket shouldn't override caching settings for images (*.gif, *.png etc.)
Wicket shouldn't offer
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