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There are some LiteSpeed WebSever special directive in rewrite rules.
If you are using LiteSpeed over Apache environment, please make sure the following directive(s) included by
<IfModule litespeed> LiteSpeed directives here </IfModule>
So it won't be processed by Apache in case switched to it.
Don't log:
Once set, skips access logging, the value does not matter, for example:
RewriteRule \.gif - [E=dontlog:1]
No Keepalive:
Closes the client's connection after finishing this request, the value does not matter, for example:
RewriteRule .* - [E=nokeepalive:1]
No Gzip:
Do not use gzip compression for this request, must be set to a non-zero value, for example:
RewriteRule \.css - [E=no-gzip:1]
do not set to 0, it has no effect.
Proxy Host:
Modify proxy request “Host” header value, for example:
A web site's domain name is “www.example.com”, it sends a proxy request to the backend, the backend is defined as a web server with name “node1”, it requires the domain name to be “www.example.com”, the rewrite rule should be
RewriteRule ^(.*)$ http://node1/$1 [P,E=Proxy-Host:www.example.com]
Cache Control:
Modify LSWS page cache policy
enable cache
Rewriterule ^/special_cachable_url$ - [E=Cache-ctrl:max-ages=30]
Rewriterule ^/non-cacheable-url$ - [E=Cache-control:no-cache]
No Abort:
This flag prevents external app processes from being killed by LSWS as a runaway process while it is in the middle of processing, this is useful when running long-time PHP application.
RewriteRule ^script_url$ - [E=noabort:1]
This is drop connection and useful when set up against DDoS attack.
RewriteRule .* - [E=blockbot:1]