Removing _dc parameter in Ext

Question

Using Ext, default Ext.Ajax add to GET-request _dc parameter. For example

GET /ConnViewProcessing/?_dc=1263286227619

How to remove this parameter?

PS: it's necessary to manually cache response to ETag and If-None-Match.

Answer 1

Set disableCaching option to false:

Ext.Ajax.disableCaching = false;