Nimbostratus
NimbostratusThanks Arie for this tip.
Now, I'm able to parse the value from the body and I'm able to determine the correct pool ($selected_pool).
But I'm a bit lost now because I have to do some rewriting on this value before submiting the POST data to this selected pool.
I don't know how to do this "properly". I'm a bit lost.
Thanks again for your help.
JC
The new version of my irule is now the following:
Collect a request payload
when HTTP_REQUEST {
if {[HTTP::method] eq "POST"}{
Trigger collection for up to 1MB of data
if {[HTTP::header "Content-Length"] ne "" && [HTTP::header "Content-Length"] <= 1048576}{
set content_length [HTTP::header "Content-Length"]
} else {
set content_length 1048576
}
Check if $content_length is not set to 0
if { $content_length > 0} {
HTTP::collect $content_length
}
}
}
when HTTP_REQUEST_DATA {
set DEBUG 0
set original_query [HTTP::payload]
set uri [string tolower $original_query]
Workaround: BIG IP Cache limitation for huge URI
-----------------------------------------------
if { [string length $uri] >= 16384} {
WAM::disable
}
Rewrite only URI of type /action= or /?action=
-----------------------------------------------
if { $uri contains "action=" } {
URI::query works only if the Query String starts with a '?'
so we add a ? in front of the Query String if needed
----------------------------------------------
if { not ($uri starts_with "/?") } {
set uri "?$uri"
}
Extract from URI the value of the following parameters:
MatchLanguage
action
DatabaseMatch
-----------------------------------------------
set matchlanguage_value [URI::query $uri matchlanguage]
set action_value [URI::query $uri action]
set db_value [URI::query $uri databasematch]
------------------
if { $DEBUG > 0 } {
log local0. "MatchLanguage value=$matchlanguage_value"
log local0. "Action value=$action_value"
log local0. "DatabaseMatch value=$db_value"
}
Rewrite URI for content servers only for the 3 types of actions otherwise default to proxy:
getquerytagvalues
query
termexpand
-------------------------------------------------------------------------------------------
if { $action_value eq "getquerytagvalues" or $action_value eq "query" or $action_value eq "termexpand" } {
Rollback to original Query with the upper and lower case
-------------------------------------------------------------------
set uri $original_query
Rewrite URI : replace .._Elx with Elx where .. match 2 chars
---------------------------------------
regsub -all ".._Elx" $uri "Elx" uri
HTTP::uri $uri
if { $DEBUG > 1 } {
log local0. "Before URI rewrite : $original_query"
log local0. "After URI rewrite : $uri"
}
Depending on MatchLanguage parameter found in the URL
Select the corresponding pool in charge of the language
If language is not in the lits, rollback to original URI and
send the query to the IDOL proxies
--------------------------------------------------------
switch $matchlanguage_value {
"english" { set selected_pool "idol-en-content-reception-pool1" }
"french" { set selected_pool "idol-fr-content-reception-pool1" }
"german" { set selected_pool "idol-de-content-reception-pool1" }
"czech" { set selected_pool "idol-cs-content-reception-pool1" }
"bulgarian" { set selected_pool "idol-bg-content-reception-pool1" }
"croatian" { set selected_pool "idol-hr-content-reception-pool1" }
"czech" { set selected_pool "idol-cs-content-reception-pool1" }
"danish" { set selected_pool "idol-da-content-reception-pool1" }
"dutch" { set selected_pool "idol-nl-content-reception-pool1" }
"estonian" { set selected_pool "idol-et-content-reception-pool1" }
"finnish" { set selected_pool "idol-fi-content-reception-pool1" }
"gaelic" { set selected_pool "idol-ga-content-reception-pool1" }
"greek" { set selected_pool "idol-el-content-reception-pool1" }
"hungarian" { set selected_pool "idol-hu-content-reception-pool1" }
"italian" { set selected_pool "idol-it-content-reception-pool1" }
"latvian" { set selected_pool "idol-lv-content-reception-pool1" }
"lithuanian" { set selected_pool "idol-lt-content-reception-pool1" }
"maltese" { set selected_pool "idol-mt-content-reception-pool1" }
"portuguese" { set selected_pool "idol-pt-content-reception-pool1" }
"romanian" { set selected_pool "idol-ro-content-reception-pool1" }
"slovak" { set selected_pool "idol-sk-content-reception-pool1" }
"slovenian" { set selected_pool "idol-sl-content-reception-pool1" }
"spanish" { set selected_pool "idol-es-content-reception-pool1" }
"swedish" { set selected_pool "idol-sv-content-reception-pool1" }
"norwegian" { set selected_pool "idol-no-content-reception-pool1" }
"icelandic" { set selected_pool "idol-is-content-reception-pool1" }
default {
if { $DEBUG > 0 } { log local0. "matchlanguage not found : roll back to idol-proxy-reception-pool1" }
HTTP::uri $original_query
set selected_pool "idol-proxy-reception-pool1"
}
}
if { $DEBUG > 0 } {
log local0. "Selected Pool=$selected_pool , MatchLanguage=$matchlanguage_value, Action=$action_value"
}
Send the HTTP request to the previously selected pool
-------------------------------------------
pool $selected_pool
}
} else {
log local0. "Action not found in query : $uri"
}
}
Nimbostratus