Hi,
it's me again
🙂 but this time only for giving you feedback.
@Kevin
I don't know why below code caught all the host name between https:// and the next / except the first letter!
if { [scan $uri_old {%*[http://|https://]%[^/]} host_old] } {
So I changed it like this:
if { [scan $uri_old {%[^//]//%[^/]]} host_tmp host_old] } {
Certainly not the best, but at least it is working
😄
Finally the iRule became:
when RULE_INIT {
Log debug messages to /var/log/ltm? 1=yes, 0=no
set static::rewrite_debug 1
External hostname for the web application
set static::external "mypublicsite.com"
}
when HTTP_REQUEST_SEND {
Need to force the host header replacement and HTTP:: commands into the clientside context
as the HTTP_REQUEST_SEND event is in the serverside context
clientside {
Different action depending on the node selected for load-balancing
switch [LB::server addr] {
"1.1.1.1" {
HTTP::header replace Host "internalhost01.com"
if {$static::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: HTTP Host header rewritten with internalhost01.com"}
}
"1.1.1.2" {
HTTP::header replace Host "internalhost02.com"
if {$static::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: HTTP Host header rewritten with internalhost02.com"}
}
}
}
}
when HTTP_RESPONSE {
Replace all internal Host headers with $static::external value defined in RULE_INIT section
HTTP::header replace Host $static::external
if {$static::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: HTTP Host header rewritten with -> $static::external"}
if { [HTTP::is_redirect] } {
Log if we detect an HTTP redirection
if {$static::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: HTTP redirection detected"}
Store Location HTTP header coming from backend server
set uri_old [string tolower [HTTP::header Location]]
Store backend server host name
if { [scan $uri_old {%[^//]//%[^/]]} host_tmp host_old] } {
Replace backend server host name with external host name into HTTP Location header
set map_exp "set uri_new \[string map {$host_old $static::external} $uri_old\]"
eval $map_exp
Finally rewrite HTTP Location header
HTTP::header replace Location $uri_new
if {$static::rewrite_debug}{log local0. "[IP::client_addr]:[TCP::client_port]: HTTP Location header rewritten with -> $uri_new"}
}
}
}
I sincerely thank you all for your very valuable help! Without you this story would have taken me too much time, really thank you.
Cirrus
