For a number of years now, I’ve been writing down my ‘observations’. Essentially, it’s a semi-structured set of text files that I keep in Dropbox. One for each day, in a folder by month. I record interesting people I see, things I did worth doing, and things my children did which were adorable.
After a while, I started wanting to look back, so first, I wrote a relatively simple script that would go back through my archives and send me everything I did 1/2/3/4/etc years ago. That worked well enough, but it ended up generating a lot of emails to go through some days. So the second generation is a server that can format those pages and display them as a nice webpage.
The most interesting part perhaps was dealing with the tarballs that I keep the archives in (they’re plain text, so they compress very well). I wanted to keep them compressed, so I had to decompress them in memory on the fly.