JSESSIONID Persistence

Hi Chris,

There are a few possible issues with the Codeshare example:

1. The cookie name for HTTP::cookie is case sensitive. So [HTTP::cookie JSessionID] won't match a cookie named jsessionid or JSESSIONID. I believe that the jsessionid name is always in lower case, whether set in the path or a cookie name.

2. findstr is also case sensitive.

3. The format for the jsessionid in the URI is /path/to/object.ext;jsessionid=jsessionid_value or with a query string /path/to/object.ext;jsessionid=jsessionid_value?param=param_value. So using findstr with a terminator of ; won't work as expected. If you were checking the URI with a terminator, it should be the ? which starts the query string. Considering the jsessionid, if present, will always be at the end of the path, you can avoid dealing with a terminator by using HTTP::path insted of HTTP::uri.

4. The findstr command needs to account for the = in jsessionid=12345...., so it should be [findstr [HTTP::path] "jsessionid=" 11]

Can you try this example which addresses the above points? If you run into problems, please check the /var/log/ltm log file for debug output. Once you're done testing, youc can comment out the log statements. If it does work, please reply so we can update the Codeshare example.

Thanks,

Aaron

  
  when HTTP_REQUEST {  
    
      Log details for the request  
     log local0. "[IP::client_addr]:[TCP::client_port]: Request to [HTTP::uri] with cookie: [HTTP::cookie value jsessionid]"  
    
      Check if there is a jsessionid cookie  
     if { [HTTP::cookie exists "jsessionid"] } {  
    
         Persist off of the cookie value  
        persist uie [HTTP::cookie "jsessionid"]  
    
         Log that we're using the cookie value for persistence and the persistence key if it exists.  
        log local0. "[IP::client_addr]:[TCP::client_port]: Used persistence record from cookie: [persist lookup uie [HTTP::cookie "jsessionid"]]"  
    
     } else {  
    
         Parse the jsessionid from the path (URI minus the query string)  
        set jsess [findstr [HTTP::path] "jsessionid=" 11]  
    
         Use the jsessionid from the path for persisting  
        if { $jsess != "" } {  
    
           persist uie $jsess  
    
            Log that we're using the path jessionid for persistence and the persistence key if it exists.  
           log local0. "[IP::client_addr]:[TCP::client_port]: Used persistence record from path: [persist lookup uie $jsess]"  
        }  
     }  
  }  
  when HTTP_RESPONSE {  
    
      Check if there is a jsessionid cookie in the response  
     if { [HTTP::cookie exists "jsessionid"] } {  
    
         Persist off of the cookie value  
        persist add uie [HTTP::cookie "jsessionid"]  
    
        log local0. "[IP::client_addr]:[TCP::client_port]: Added persistence record from cookie: [persist lookup uie [HTTP::cookie "jsessionid"]]"  
     }  
  }