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webook_server
💩📖 Worst E-book server - light weight OPDS and web server that converts ebook formats on the fly, using Python (2 or 3) and optional Calibre convert
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InfluxDB
Power Real-Time Data Analytics at Scale. Get real-time insights from all types of time series data with InfluxDB. Ingest, query, and analyze billions of data points in real-time with unbounded cardinality.
I'm not clear on your requirements other than preserving directory structure. I've been off and on documenting (with very rough/scant notes) about OPDS servers I stumble across at https://github.com/clach04/webook_server/issues/9 dir2opds may work for you?
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