Its posbile convert .htaccess a openlitespeed:
###########################################################################
Réécriture d’url
<IfModule mod_rewrite.c>
Options +FollowSymLinks
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteCond %{REQUEST_FILENAME} !-l
RewriteRule ^(.*)$ index.php [NC,L]
</IfModule>
###########################################################################
Compression
<IfModule mod_deflate.c>
SetOutputFilter DEFLATE
AddOutputFilterByType DEFLATE text/html text/css text/plain text/xml application/x-javascript application/x-httpd-php
# Pour les navigateurs incompatibles
BrowserMatch ^Mozilla/4 gzip-only-text/html
BrowserMatch ^Mozilla/4\\.0[678] no-gzip
BrowserMatch \\bMSIE !no-gzip !gzip-only-text/html
BrowserMatch \\bMSI[E] !no-gzip !gzip-only-text/html
SetEnvIfNoCase Request_URI \\.(?:gif|jpe?g|png)$ no-gzip
# Header append Vary User-Agent env=!dont-vary
</IfModule>
###########################################################################
Expires Headers
<IfModule mod_expires.c>
AddType image/x-icon .ico
ExpiresActive On
ExpiresDefault "access plus 7200 seconds"
ExpiresByType image/jpg "access plus 2592000 seconds"
ExpiresByType image/jpeg "access plus 2592000 seconds"
ExpiresByType image/png "access plus 2592000 seconds"
ExpiresByType image/gif "access plus 2592000 seconds"
ExpiresByType image/ico "access plus 2592000 seconds"
ExpiresByType image/icon "access plus 2592000 seconds"
ExpiresByType image/x-icon "access plus 2592000 seconds"
ExpiresByType text/css "access plus 2592000 seconds"
ExpiresByType text/javascript "access plus 2592000 seconds"
ExpiresByType text/html "access plus 7200 seconds"
ExpiresByType application/xhtml+xml "access plus 7200 seconds"
ExpiresByType application/javascript A259200
ExpiresByType application/x-javascript "access plus 2592000 seconds"
ExpiresByType application/x-shockwave-flash "access plus 2592000 seconds"
</IfModule>
###########################################################################
Set the Memory Limit
<IfModule mod_php5.c>
php_value memory_limit 64M
</IfModule>
###########################################################################
Cache Control
<IfModule mod_headers.c>
Header unset Cache-Control
Header set Cache-Control "max-age=1, private"
<FilesMatch "\\\\.(ico|jpe?g|png|gif|swf|css|gz)$">
Header set Cache-Control "max-age=2592000, public"
</FilesMatch>
<FilesMatch "\\\\.(js)$">
Header set Cache-Control "max-age=2592000, private"
</FilesMatch>
<filesMatch "\\\\.(html|htm)$">
Header set Cache-Control "max-age=7200, public"
</filesMatch>
# Disable caching for scripts and other dynamic files
# <FilesMatch "\\.(pl|php|cgi|spl|scgi|fcgi)$">
# Header unset Cache-Control
# </FilesMatch>
</IfModule>
###########################################################################
ETAGS
<IfModule mod_headers.c>
Header unset ETag
FileETag none
</IfModule>
###########################################################################
Sécurité
Options -Indexes
<files .htaccess>
order allow,deny
deny from all
</files>
DirectoryIndex index.php
Regards,