[!!!][TASK] Remove FE & BE HTTP response compression (#6158)

* [!!!][TASK] Remove FE & BE HTTP response compression

Resolves: TYPO3-Documentation/Changelog-To-Doc#1426
Releases: main

* Update Documentation/Configuration/Typo3ConfVars/FE.rst

Co-authored-by: Chris Müller <2566282+brotkrueml@users.noreply.github.com>

* [!!!][TASK] Remove FE & BE HTTP response compression

Resolves: TYPO3-Documentation/Changelog-To-Doc#1426
Releases: main

---------

Co-authored-by: Chris Müller <2566282+brotkrueml@users.noreply.github.com>

Author: linawolf

Documentation/Configuration/Typo3ConfVars/BE.rst

@@ -453,22 +453,14 @@ The following configuration variables can be used to configure the TYPO3 backend
 ..  confval:: compressionLevel
     :Path: $GLOBALS['TYPO3_CONF_VARS']['BE']['compressionLevel']
     :name: globals-typo3-conf-vars-be-compressionLevel
-    :type: text
-    :Default: 0
-    :Range: 0-9
 
-    Determines output compression of BE output. Output is smaller but
-    page generation slows down depending on compression level. Requires
+    ..  versionchanged:: 14.0
 
-    *  zlib in your PHP installation and
-    *  special rewrite rules for :file:`.css.gz` and :file:`.js.gz`
-       (before version 12.0 the extension was :file:`.css.gzip` and :file:`.js.gzip`)
+        Backend HTTP response compression has been removed. Response compression
+        should be applied by web servers and not by the application layer.
 
-    Please see :file:`EXT:install/Resources/Private/FolderStructureTemplateFiles/root-htaccess`
-    for an example. The range is `1`-`9`, where `1` is least
-    compression and `9` is greatest compression. Setting the value to :php:`true`
-    will set the compression based on the PHP default settings (usually `5` ). The
-    recommended and most optimal value is `5`.
+        See also: `Breaking: #107943 - Frontend and backend HTTP response
+        compression removed <https://docs.typo3.org/permalink/changelog:breaking-107943-1761860828>`_
 
 ..  _typo3ConfVars_be_installToolPassword:
 
@@ -639,10 +631,6 @@ The following configuration variables can be used to configure the TYPO3 backend
     mode. Also, fieldnames are appended to field labels. Use
     this to debug the backend only!
 
-    Disables the
-    :ref:`$GLOBALS[TYPO3_CONF_VARS][BE][compressionLevel] <typo3ConfVars_be_compressionLevel>`
-    setting.
-
 ..  _typo3ConfVars_be_HTTP:
 
 ..  confval:: HTTP

Documentation/Configuration/Typo3ConfVars/FE.rst

@@ -60,21 +60,22 @@ the TYPO3 frontend:
 ..  confval:: compressionLevel
     :Path: $GLOBALS['TYPO3_CONF_VARS']['FE']['compressionLevel']
     :name: typo3-conf-vars-fe-compressionLevel
-    :type: int
+    :type: text
     :Default: 0
+    :Range: 0-9
+
+    Defines the compression level used for **frontend resource pre-compression**
+    (JavaScript and CSS files) when combined with the TypoScript settings
+    `config.compressJs  <https://docs.typo3.org/permalink/t3tsref:confval-config-compressjs>`_
+    and `compressCss  <https://docs.typo3.org/permalink/t3tsref:confval-config-compresscss>`_.
 
-    Determines output compression of FE output. Makes output smaller but
-    slows down the page generation depending on the compression level. Requires
+    ..  versionchanged:: 14.0
 
-    *   zlib in your PHP installation and
-    *   special rewrite rules for :file:`.css.gz` and :file:`.js.gz`
-        (before version 12.0 the extension was :file:`.css.gzip` and :file:`.js.gzip`)
+        Frontend HTTP response compression has been removed. Response compression
+        should be applied by web servers and not by the application layer.
 
-    Please see :file:`EXT:install/Resources/Private/FolderStructureTemplateFiles/root-htaccess`
-    for an example. Range `1`-`9`, where `1` is least
-    compression and `9` is greatest compression. :php:`true` as value will set the
-    compression based on the PHP default settings (usually `5` ). Suggested and
-    most optimal value is `5`.
+        See also: `Breaking: #107943 - Frontend and backend HTTP response
+        compression removed <https://docs.typo3.org/permalink/changelog:breaking-107943-1761860828>`_
 
 ..  _typo3ConfVars_fe_pageNotFoundOnCHashError:
 

Documentation/Security/GuidelinesAdministrators/_codesnippets/_nginx.config

@@ -99,8 +99,7 @@ server {
 
     # Compressing resource files will save bandwidth and so improve loading speed especially for users
     # with slower internet connections. TYPO3 can compress the .js and .css files for you.
-    # *) Set $GLOBALS['TYPO3_CONF_VARS']['BE']['compressionLevel'] = 9 for the Backend
-    # *) Set $GLOBALS['TYPO3_CONF_VARS']['FE']['compressionLevel'] = 9 together with the TypoScript properties
+    # *) Set the TypoScript properties
     #    config.compressJs and config.compressCss for GZIP compression of Frontend JS and CSS files.
     location ~ \.js\.gzip$ {
         add_header Content-Encoding gzip;