Erik/SPA_TemperProductionOverview
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feat: opt into gateway CORS for cross-origin Grafana iframe embed

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Declare CORS_ALLOW_ORIGINS=["*"]. The kernel loader reads this opt-in and emits Access-Control-Allow-Origin for this module's prefix only, so the SPA's Vite `crossorigin` assets load inside a sandboxed Grafana iframe (opaque origin) instead of being CORS-blocked (blank page).

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
This commit is contained in:
Erik 2026-07-10 13:56:33 +02:00
parent 3d52e0b79e
commit 9be247c32c
1 changed files with 8 additions and 0 deletions
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8
__init__.py
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@ -31,6 +31,14 @@ MODULE_NAME = "temper_overview"
# MUST match vite.config.ts `base` (with a trailing slash on the Vite side). # MUST match vite.config.ts `base` (with a trailing slash on the Vite side).
MODULE_PREFIX = "/module/temper_overview" MODULE_PREFIX = "/module/temper_overview"
# CORS opt-in (read by the kernel loader, app.core.modules). This login-free board
# is embedded cross-origin in a Grafana text panel, which renders it inside a
# SANDBOXED iframe → the document gets an opaque origin (Origin: null). Vite tags the
# SPA's own JS/CSS `crossorigin`, so those assets are fetched in CORS mode and the
# browser blocks them (blank page) unless the gateway allows the read. "*" is safe:
# this is no-auth, read-only shop-floor data, and only "*" satisfies Origin: null.
CORS_ALLOW_ORIGINS = ["*"]
def register(app: FastAPI) -> None: def register(app: FastAPI) -> None:
"""Mount the data API and the SPA onto the gateway app. """Mount the data API and the SPA onto the gateway app.