Persistence Across HTTP Methods

Problem this snippet solves:

This code will provide persistence across GET & POST HTTP Methods using Client IP & SessionID as the persistence key.

How to use this snippet:

This code provides a simple structure that can be adapted to specific use cases. The code can be used as a standalone iRule or used along with Universal Persistence. It is recommended to enable OneConnect profile for this code in order to process individual HTTP Requests.

Code :

when HTTP_REQUEST {
set HOST [string tolower [HTTP::host]]
set SRCADDR [IP::remote_addr]

if { $HOST contains "domain.com" } {

#Match on HTTP Method GET
if { [HTTP::method] equals "GET" } {
set SESSIONID [findstr [HTTP::uri] "uuid=" 5 20]
set KEY [crc32 $HOST$SESSIONID]
#Persistence based on source address & session id present in URI
persist hash $KEY 14400

#Start collecting content provided by POST method
} elseif { (([HTTP::method] equals "POST") and ([HTTP::uri] contains "/amm/ampxml.jsp")) } {

  if {[HTTP::header "Content-Length"] ne "" && [HTTP::header "Content-Length"] <= 1048} {
    set CONTENT [HTTP::header "Content-Length"]
  } else {
      set CONTENT 1048
  }
  if { $CONTENT > 0 } {
    HTTP::collect $CONTENT
}
}
}
}

#Persistence based on the POST content
when HTTP_REQUEST_DATA {
if { (([HTTP::method] equals "POST") and ([HTTP::uri] contains "/amm/ampxml.jsp")) } {
set HOST [string tolower [HTTP::host]]
set SESSIONID [findstr [HTTP::payload] "uuid=" 5 20]
set KEY [crc32 $HOST$SESSIONID]

persist hash $KEY 14400

}
}

Tested this on version: