Should I disable ETags?

On the other hand, it poses security risks in case it gets leaked by your code, and can result in cache poisoning attack on your website. So it is better to disable ETag if your website does not need it.

What is ETag used for?

An entity tag (ETag) is an HTTP header used for Web cache validation and conditional requests from browsers for resources. Etags use persistent identification elements (PIE) that have been tagged to the user’s browser.

What is header unset ETag?

Goal. Entity tags (ETags) are a mechanism to check for a newer version of a cached file. By removing the ETag header, you disable caches and browsers from being able to validate files, so they are forced to rely on the Cache-Control and Expires header.

How do I disable Apache cache?

How To Disable Apache Cache

  1. Open . htaccess file. There are many ways to disable Apache cache.
  2. Disable Apache Cache. Let’s say you want to disable caching html, js, css files only, then add the following lines to your .
  3. Restart Apache Server. Restart Apache Server to apply changes $ sudo service apache2 restart.

What is ETag value?

Typically, the ETag value is a hash of the content, a hash of the last modification timestamp, or just a revision number. For example, a wiki engine can use a hexadecimal hash of the documentation article content.

How do you test an ETag?

Chrome

  1. Load the web page that you want to test.
  2. Hit F12 to open the Developer Tools.
  3. Switch to the Network Tab.
  4. Reload the page.
  5. Check the main page element first, usually at the top.
  6. ETag should be listed under Response Headers on the right side.

What is Apache cache?

The most basic form of caching present in Apache is the file-handle caching provided by mod_file_cache . Rather than caching file-contents, this cache maintains a table of open file descriptors. Files to be cached in this manner are specified in the configuration file using the CacheFile directive.

How does Apache cache work?

Configure Caching in Apache Apache comes with three modules for caching content, one enables it and the remaining two determine where the cache store exists – on disk or in memory. Determining which module to use for the cache store depends on your available hardware resources and performance requirements.

What is the if-none-match header?

The HTTP Header If-None-Match is a request-type header. Generally, it is used to update the entity tags on the server. Firstly, the Client provides the Server with a set of entity tags (E-tags). The Server compares the given tags with those it already has for the resource.

What is express ETag?

Express package uses the etag package (it’s just one file, managed by the same guys) to generate the ETag value. Internally, the etag package uses sha1 encryption of the body, and nothing crazy, to keep the performance at its best. (If you imagine, this function will be called a lot!

What is ETag Filipino?

Etag is the general term used in Cordillera about the native’s traditional way or preserving pork. A slab of a big slice of pork is cured in salt for about a week (or longer) then air-dried under the sun or smoked for several weeks (even months), or both.