Logfile Tools and Partial Downloads (200 vs 206 status code)

I apologize if this question has been asked before I have searched but not found an answer yet.

I work for an organization that has many pdf files on its website and we need to track how often these pdfs are downloaded. We recently realized that when large pdf files are downloaded, the client software will issue a download request and then a series of partial download requests. In the webserver logs this shows as a single entry with status of 200 (successful download) and then a series of 206 (partial download) codes.

The problem is our current logfile analysis tool (Summary.net) treats them all as requests for the file, thus greatly inflating the actual number of actual downloads. For example, on a recent day a specific document was listed as being "downloaded" 135. However when viewing the logfile it was clear it was only downloaded three times; the other 132 were "partial download" entries.

So my question to the forum is does anyone know of logfile analysis tools that correctly report downloads (e.g. ignore the 206 status codes when they are linked to a successful 200 code)? I have been to MANY analysis tool websites (e.g. AWStats, others) but have not found any that specifically claim to deal with, or even acknowledge this problem.

We have considered retooling our website to write to a database when a file is requested, and other such workarounds, but this seems like a problem logfile analysis tools should be able to handle.

Any suggestions?

Thanks,

-mark