ao3rss but Rust

Heavily based off/inspired by ao3rss.

Usage

Usage is basically the same as the original ao3rss.

• GET /work/<work_id>: Generates an RSS feed for the given ao3 work, with one item per chapter.
• (eventually) GET /series/<series_id>: Generates an RSS feed for the given ao3 series, with one item per chapter in every work in the series.

Differences between this and the original ao3rss

• Feed is generated using a library, instead of templated text.
  • The RSS library in question could probably use some usability improvements, but I still think it's a step up.
• Scrapes https://archiveofourown.org/works/<id>?view_full_work=true instead of https://archiveofourown.org/works/<id>/navigate
  • This lets me pull the summaries and content for every chapter, at the cost of having the dates for each individual chapter.
  • In the future, it should be feasible to scrape both and combine the data, but I figured this was enough for the moment.
• Features a keep-alive interval. Every second that the RSS feed has not been generated, <!-- keepalive --> will be sent.
  • This is an ugly hack. There's probably another way around this. (If I knew what it was, I wouldn't be doing this.)
  • This is enabled by the keepalive feature, which can be disabled by passing --no-default-features to cargo when building.

TODO

• Configuration. Everything is kinda hardcoded at the moment.
• Print a line to stdout per request.
• Add feeds for series, and possibly other things.
• Detect one-shots, and remove chapter numbers from titles accordingly.