This is an Overview converter. It extracts a single email (message/rfc822) into its body and attachments.

Usage

In an Overview cluster, you'll want to use the Docker container:

docker run -e POLL_URL=http://worker-url:9032/Email overview/overview-convert-email:2.1.0

Developing

docker build . will compile and run unit tests. The tests are in test/test-*.

./dev will connect to the overviewserver_default network and run with POLL_URL=http://overview-worker:9032/Email.

Design decisions

We parse using GMime: it's fast, widely used, well-designed and well-documented. (In particular, it handles charset conversion and reformats addresses and dates.) Best of all, it's a streaming library: we couldn't bring its usage above 10MB, even when testing large files. The downside: we use C.

Output is deterministic and it's a single file. That makes testing easy.

License

This software is Copyright 2011-2018 Jonathan Stray, and distributed under the terms of the GNU Affero General Public License. See the LICENSE file for details.