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Tobias GesellchenandClaude Opus 4.8
ad0f1fbd8f
Foundation for browsing DLNA media servers and playing tracks on a SoundTouch speaker (https://github.com/gesellix/Bose-SoundTouch/discussions/213). - pkg/discovery/ssdp.go: a target-agnostic UPnP SSDP core. SearchSSDP sweeps multiple targets (a typed device URN plus ssdp:all, since some servers only answer one), fans out across all routable IPv4 interfaces, and sends each batch in two rounds spaced 80ms apart so slower NAS/router boxes that drop back-to-back bursts still answer. FetchDescription parses a UPnP device description into a generic device tree with FindService/FirstIcon that recurse through sub-devices. The XML parse is a pure function for offline unit testing. - pkg/discovery/mediaserver.go: DiscoverMediaServers rides the core, keeps only devices exposing a ContentDirectory service, and dedupes by UDN. The description->MediaServer mapping is a pure, tested function. - pkg/dlna: a ContentDirectory browse client (Browse + DIDL-Lite parse + IsAudioItem), consuming discovery.MediaServer. Kept separate from discovery, mirroring how pkg/client is separate from pkg/discovery. Track metadata maps upnp:artist / upnp:album; the audio filter accepts audio/* MIME or an audioItem/musicTrack class. Existing SoundTouch speaker discovery (pkg/discovery/upnp.go) is untouched; migrating it onto the shared core is a later, de-risked step. Tests cover the description/DIDL parsers and run the browse client against an in-process ContentDirectory server; the parse was checked against real minidlna and FRITZ!Box output. Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>