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BrightSign: resolve the storage root by probing, and put widget storage on it

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Verified on the XT245 after fitting an NVMe.

StorageRoot() knew only FLASH and SD. That unit has a dead card slot and boots
from internal flash, so the moment real storage was fitted and the deployment
moved onto it, every derived path — the offline page, the widget's local
storage, the self-update paths — resolved to "SD:", a slot with nothing in it.
It now probes in the order the OS itself searches for an autorun script, so the
answer matches the volume the player actually booted from.

storage_path was "/cache", which carries no BrightSign drive specifier and so
resolves outside the writable volumes. It is now an absolute path on the boot
volume, confirmed on hardware: after the move the player created SSD:/cache
where before it only ever touched FLASH:/cache.

Note for anyone chasing the same thing: this did NOT enable the service worker.
The widget still never requests sw.js, so the player's inability to cache
offline on BrightSign is not a storage-configuration problem. The capability is
declared honestly now (see the previous commit) rather than advertised and unmet.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01Uaeo9MvzKoyXuN6ZsbhtkL
This commit is contained in:
ScreenTinker 2026-08-05 22:32:17 -05:00
parent 0a888910dc
commit 76ba6c7506
1 changed files with 24 additions and 1 deletions
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25
brightsign/autorun.brs
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@ -30,7 +30,25 @@
' So ask the filesystem instead of assuming: whichever volume holds this script is the volume
' that holds everything else beside it.
Function StorageRoot() As String
' Which volume are we actually running from? Everything else is derived from this — the offline
' page, the widget's storage directory, the self-update paths — so getting it wrong points the
' whole player at a volume that may not physically exist.
'
' Probed in the order the OS itself searches for an autorun script (roStorageHotplug.GetStorages()
' documents ["USB1:/", "SD:/", "SD2:/", "SSD:/", "FLASH:/"]), so the answer matches the volume the
' player actually booted from. FLASH is last because it is the fallback of last resort: the unit
' this was developed on has a dead card slot and boots from internal flash, and an earlier version
' of this function knew only FLASH and SD — so fitting real storage to that player and moving the
' files onto it would have silently resolved every path to "SD:", a slot with nothing in it.
'
' ReadFile rather than a MatchFiles existence check: MatchFiles takes a DIRECTORY plus a pattern
' and returns nothing when the pattern contains a separator, which is why the helper further down
' this file never finds anything.
ba = CreateObject("roByteArray")
if ba.ReadFile("USB1:/autorun.brs") then return "USB1:"
if ba.ReadFile("SSD:/autorun.brs") then return "SSD:"
if ba.ReadFile("SD:/autorun.brs") then return "SD:"
if ba.ReadFile("SD2:/autorun.brs") then return "SD2:"
if ba.ReadFile("FLASH:/autorun.brs") then return "FLASH:"
return "SD:"
End Function
@ -115,7 +133,12 @@ Function MakeWidget(url As String, rect As Object, port As Object, cfg As Object
javascript_enabled: true
security_params: { websecurity: true }
hwz_default: "on" ' hardware z-order — video on its own plane
storage_path: "/cache" ' DIRECTORY NAME for the local storage cache
' An ABSOLUTE path on the volume we booted from. "/cache" carries no BrightSign drive
' specifier, so it resolves outside the writable volumes and the widget's local storage —
' the backing store a service worker, the Cache API and IndexedDB all need — has nowhere to
' persist to. The XT245 on alpha exposes navigator.serviceWorker and then refuses to
' register one, which is exactly what a widget with no usable storage would do.
storage_path: StorageRoot() + "/cache" ' local storage, on the volume we booted from
storage_quota: "1073741824" ' 1GB, as a STRING — service-worker offline cache
port: port
mouse_enabled: false