Home Accessibility Courses Diary The Mouth Facebook Resources Site Map About Us Contact
Etag in http headers - what is it?

If you've ever looked at the headers you receive back from your web server, you may have noticed an Etag. What is it?

An Etag is an "entity tag" and it provides a unique identifier for the resource being supplied. Browser requests can use an etag and an if-match header to check whether a resource has been modified since it was served, providing an efficient caching facility that relies on content rather than on timeouts.
(written 2007-10-03)

 
Associated topics are indexed as below, or enter http://melksh.am/nnnn for individual articles
A207 - Web Application Deployment - HTTP
  [3432] 3 digit HTTP status codes - what are they, which are most common, which should be a concern? - (2011-09-11)
  [2918] Downloading a report from the web for further local analysis - (2010-08-13)
  [2738] What is all this SESSION stuff about? (PHP) - (2010-04-25)
  [2596] Http protocol - what does a web server send - (2010-01-24)
  [2321] Uploading and Downloading files - changing names (Perl and PHP) - (2009-08-04)
  [1549] http, https and ajp - comparison and choice - (2008-02-22)
  [1503] Web page (http) error status 405 - (2008-01-12)
  [484] Setting the file name for a downloaded document - (2005-11-03)


Back to
Load Balancing with Apache mod_jk (httpd/Tomcat)
Previous and next
or
Horse's mouth home
Forward to
Simple page password protection - PHP
Some other Articles
First Great Western - information for customers
Using a MySQL database to control mod_rewrite via PHP
Static variables in PHP
Simple page password protection - PHP
Etag in http headers - what is it?
Load Balancing with Apache mod_jk (httpd/Tomcat)
Choosing between mod_proxy and mod_rewrite
Python v Ruby
Maidenhead Coffee Challenge
New Month, New Quarter, New Laws
4280 posts, page by page
Link to page ... 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86 at 50 posts per page


This is a page archived from The Horse's Mouth at http://www.wellho.net/horse/ - the diary and writings of Graham Ellis. Every attempt was made to provide current information at the time the page was written, but things do move forward in our business - new software releases, price changes, new techniques. Please check back via our main site for current courses, prices, versions, etc - any mention of a price in "The Horse's Mouth" cannot be taken as an offer to supply at that price.

Link to Ezine home page (for reading).
Link to Blogging home page (to add comments).

You can Add a comment or ranking to this page

© WELL HOUSE CONSULTANTS LTD., 2014: Well House Manor • 48 Spa Road • Melksham, Wiltshire • United Kingdom • SN12 7NY
PH: 01144 1225 708225 • FAX: 01144 1225 899360 • EMAIL: info@wellho.net • WEB: http://www.wellho.net • SKYPE: wellho

PAGE: http://www.wellho.net/mouth/1378_Eta ... s-it-.html • PAGE BUILT: Sun Mar 30 15:20:58 2014 • BUILD SYSTEM: WomanWithCat