Convert 404s to Blank 200s
Problem this snippet solves:
An iRule to convert an HTTP 404 response to a blank 200 response. HTTP 404 responses cannot be cached and will always hit your back end infrastructure. If you are using a proxy/cache for your web application, you can convert the HTTP 404 response to a blank 200 response that can be cached. This can be useful for reducing the load on your back end if you have a web site which is always under construction. It can also help mitigate one type of denial of service attack.
Code :
# iRule to replicate no 404s when HTTP_REQUEST { # Don't allow data to be chunked if { [HTTP::version] eq "1.1" } { if { [HTTP::header is_keepalive] } { HTTP::header replace "Connection" "Keep-Alive" } HTTP::version "1.0" } } when HTTP_RESPONSE { # grab response of a 404 if {[HTTP::status] == 404}{ HTTP::collect [HTTP::header Content-Length] } } when HTTP_RESPONSE_DATA { # change response to 200 and send HTTP::respond 200 content [HTTP::payload] }
Published Mar 17, 2015
Version 1.0Patrick_Chang_7
Historic F5 Account
Joined April 13, 2006
Patrick_Chang_7
Historic F5 Account
Joined April 13, 2006
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