Adds a dependency-free Go DLNA/UPnP MediaServer used to develop and test
the upcoming "browse a DLNA server and play on a SoundTouch" feature
(https://github.com/gesellix/Bose-SoundTouch/discussions/213).
Two faces over one content core:
- pkg/dlna/dlnatest: an in-process server (httptest) serving rootDesc.xml
and ContentDirectory Browse for an injectable content tree, for fast
cross-platform unit tests with no Docker and no multicast.
- cmd/example-dlna-server: the same handlers behind a real http.Server
plus an SSDP responder (answers M-SEARCH, periodic NOTIFY), so a real
speaker on the LAN can discover it and fetch real (silent WAV) audio.
A Docker minidlna was unusable here: on macOS the container IP in the
DIDL <res> URL is unreachable from the LAN, and its SSDP never reaches the
speakers. A native Go server embeds the host LAN IP and is discoverable.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Tobias GesellchenandClaude Opus 4.8