Persist On Last JSESSIONID in HTTP Parameter
Problem this snippet solves: This iRule was written with the goal to persist on only the last jsessionid that is present when multiple jsessionid HTTP Paremeters are present.. How to use this snippet: I ran into a particular challenge where a customer was receiving a request where a jsessionid was expected to be set in an HTTP Request Parameter. For those of you who are not familiar, see where the parameters lye below: <scheme>://<username>:<password>@<host>:<port>/<path>;<parameters>?<query>#<fragment> REF: http://www.skorks.com/2010/05/what-every-developer-should-know-about-urls/ Here is an example of a full request: http://www.example.com/my/resource.html;jsessionid=0123456789abcdef;jsessionid=0123456789abcdef?alice=mouse In the above example, there are two jsessionid parameters, both of which are the same value. This is what was being used to Persist "*jsessionid*" { #Parse the URI and look for jsessionid. Skip 11 characters and match up to the next "?" set session_id [findstr [HTTP::uri] jsessionid 11 "?"] } Code : when CLIENT_ACCEPTED { set debug 1 } when HTTP_REQUEST { set logTuple "[IP::client_addr]:[TCP::client_port] - [IP::local_addr]:[TCP::local_port]" set parameters [findstr [HTTP::path] ";" 1] set session_id "" foreach parameter [split $parameters ";"] { scan $parameter {%[^=]=%s} name value if {$debug}{log local0.debug "$logTuple :: Multiple JsessionID in: [HTTP::host][HTTP::uri]"} if {$name equals "jsessionid"} {set session_id $value} } if {$session_id ne ""}{ #Persist on the parsed session ID for X seconds if {$debug}{log local0.debug "$logTuple :: Single JsessionID in: [HTTP::host][HTTP::uri]"} persist uie $session_id 86400 } }
