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29 lines
1.9 KiB
Markdown
29 lines
1.9 KiB
Markdown
# Library Switching and Preview Routes
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Library switching no longer requires restarting the backend. The preview
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thumbnails shown in the UI are now served through a dynamic endpoint that
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resolves files against the folders registered for the active library at request
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time. This allows the multi-library flow to update model roots without touching
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the aiohttp router, so previews remain available immediately after a switch.
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## How the dynamic preview endpoint works
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* `config.get_preview_static_url()` now returns `/api/lm/previews?path=<encoded>`
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for any preview path. The raw filesystem location is URL encoded so that it
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can be passed through the query string without leaking directory structure in
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the route itself.【F:py/config.py†L398-L404】
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* `PreviewRoutes` exposes the `/api/lm/previews` handler which validates the
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decoded path against the directories registered for the current library. The
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request is rejected if it falls outside those roots or if the file does not
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exist.【F:py/routes/preview_routes.py†L5-L21】【F:py/routes/handlers/preview_handlers.py†L9-L48】
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* `Config` keeps an up-to-date cache of allowed preview roots. Every time a
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library is applied the cache is rebuilt using the declared LoRA, checkpoint
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and embedding directories (including symlink targets). The validation logic
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checks preview requests against this cache.【F:py/config.py†L51-L68】【F:py/config.py†L180-L248】【F:py/config.py†L332-L346】
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Both the ComfyUI runtime (`LoraManager.add_routes`) and the standalone launcher
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(`StandaloneLoraManager.add_routes`) register the new preview routes instead of
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mounting a static directory per root. Switching libraries therefore works
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without restarting the application, and preview URLs generated before or after a
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switch continue to resolve correctly.【F:py/lora_manager.py†L21-L82】【F:standalone.py†L302-L315】
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