HTTP Path Modification and Response Rewrite
I have a VIP which is hosting multiple versions of the same application: the current version (/APP_APP1153/APP1153.ashx)is sent to the pool configured on the VS, /G1/APP_APP1153/APP1153.ashx is sent to a G1 pool, and /G2/APP_APP1153/APP1153.ashx is sent to a G2 pool. The issue I am having is the response arriving at the client has /APP_APP1153/APP1153.ashx in the path, so subsequent requests are being send to the pool configured on the VS rather the G1 or G2 pools. The VS is configured with both a client and server SSL profile (SSL offloading). I am trying to rewrite the HTTP_RESPONSE_DATA, but I have not yet been successful. The rewrite should be as follows: Client sends /G1/APP_APP1153/APP1153.ashx, the iRule modifies the path to /APP_APP1153/APP1153.ashx, the server responds with /APP_APP1153/APP1153.ashx, and the iRule replaces /APP_APP1153/APP1153.ashx to /G1/APP_APP1153/APP1153.ashx before sending the data to the client. Client sends /G2/APP_APP1153/APP1153.ashx, the iRule modifies the path to /APP_APP1153/APP1153.ashx, the server responds with /APP_APP1153/APP1153.ashx, and the iRule replaces /APP_APP1153/APP1153.ashx to /G2/APP_APP1153/APP1153.ashx before sending the data to the client. Currently, the page is not loading and Firefox is reporting "Secure Connection Failed". I see the GET request in Firefox Developer tools, but I do not see a response. I suspect the issue is in the rewrite, but cannot pinpoint the root cause. Any help would be appreciated. This is the iRule I have configured on the VS. when HTTP_REQUEST { switch [HTTP::path] { "/G1/APP_APP1153/APP1153.ashx" { HTTP::cookie remove "app1153" HTTP::cookie remove "ASP.NET_SessionId" pool app-g1_443_pool persist cookie insert app1153 HTTP::path "/TCM_TCM1153/TCM1153.ashx" set ::group1 1 } "/G2/TCM_TCM1153/TCM1153.ashx" { HTTP::cookie remove "app1153" HTTP::cookie remove "ASP.NET_SessionId" pool app-g2_443_pool persist cookie insert app1153 HTTP::path "/APP_APP1153/APP1153.ashx" set ::group2 1 } } } when HTTP_RESPONSE { if { $::group1 } { collect response data if { [HTTP::header exists "Content-Length"] } { set content_length [HTTP::header "Content-Length"] } else { set content_length 4294967295 } if { $content_length > 0 } { HTTP::collect $content_length } } elseif { $::group2 } { collect response data if { [HTTP::header exists "Content-Length"] } { set content_length [HTTP::header "Content-Length"] } else { set content_length 4294967295 } if { $content_length > 0 } { HTTP::collect $content_length } } } when HTTP_RESPONSE_DATA { if { $::group1 } { set find "/APP_APP1153/APP1153.ashx" set replace "/G1/APP_APP1153/APP1153.ashx" set offset 0 set diff [expr [string length $replace] - [string length $find]] Get indices of all instances of find string in the payload set indices [regexp -all -inline -indices $find [HTTP::payload]] foreach idx $indices { set start [expr [lindex $idx 0] + $offset] set end [expr [lindex $idx 1] + $offset] set len [expr {$end - $start + 1}] replace the instance of find with the contents of replace HTTP::payload replace $start $len $replace modify offset if the replace string is larger or smaller than find. incr offset $diff } } elseif { $::group2 } { set find "/APP_APP1153/APP1153.ashx" set replace "/G2/APP_APP1153/APP1153.ashx" set offset 0 set diff [expr [string length $replace] - [string length $find]] Get indices of all instances of find string in the payload set indices [regexp -all -inline -indices $find [HTTP::payload]] foreach idx $indices { set start [expr [lindex $idx 0] + $offset] set end [expr [lindex $idx 1] + $offset] set len [expr {$end - $start + 1}] replace the instance of find with the contents of replace HTTP::payload replace $start $len $replace modify offset if the replace string is larger or smaller than find. incr offset $diff } } }