Hi again, Henrik, thank you for your swift reply. The customlog patch will certainly be useful. I have one question regarding the "logformat" line. In the examples I've seen, some things seem to be quoted, others not. What is the rule for that? Also, is it possible to include a condition so only requests of certain mime types are logged? If so, how is it done? I checked the documentation and didn't find anything. Is there a separate setting in the squid.conf maybe? Thank you, /David > Hello, > > I am using Squid to collect log data as part of a user study. > > My problem is that logging headers ("log_mime_hdrs") together with the > "regular" logging that takes place generates huge amounts of data. I > am trying to minimze that load. > > I am exclusively interested in logging: > > - document requests (i.e not image mime types) > - one specific line in the http request header > > Are there some settings which would allow me to filter out these values? http://devel.squid-cache.org/old_projects.html#customlog Regards Henrik