You are looking at historical revision 24823 of this page. It may differ significantly from its current revision.
Symbolic expression log format for Spiffy's access log
Just use this extension:
spiffy-sexpr-log configures spiffy's handle-access-logging parameter to set the log format to s-expressions, so you can just read the log file or port to parse the log data.
Notice that the default spiffy configuration doesn't log anything. You have to enable logging by using the access-log parameter.
Command line tool
This egg provides a command line tool (spiffy-log2sexpr) to convert the default spiffy log format to the s-expression format.