parsing message in rsyslog configuration

Here are my requirements:

Send the vsftpd logs to syslog, and parse and format the data as the following:

:::

I have tried to use a script to parse the log but I would like to know if there more efficient way to handle this. I am a newbie to rsyslog.

Currently our rsyslog version is 5.8 in RHEL 6.

My question is:

1. What is the best version of rsyslog to implement this?
2. What is the best way to implement the parsing of the message?