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Browsers apply much more aggressive heuristic caching to a linked stylesheet than to the dynamically-rendered HTML that references it, so a CSS-only deploy could silently leave an already-open browser serving the old styles until a hard refresh -- exactly what made today's dashboard polish changes look broken while testing, until forcing a fresh fetch. Appends a content-hash query param computed once at startup. Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
48 lines
1.5 KiB
Python
48 lines
1.5 KiB
Python
from __future__ import annotations
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import hashlib
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from pathlib import Path
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from fastapi import APIRouter, Request
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from fastapi.templating import Jinja2Templates
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from app.config import settings
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router = APIRouter()
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templates = Jinja2Templates(directory="app/web/templates")
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def _asset_version(path: str) -> str:
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"""A short hash of a static asset's content, used to cache-bust it in
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templates -- browsers apply much more aggressive heuristic caching to
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linked CSS/JS than to the dynamically-rendered HTML that references it,
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so without this, a deploy that only changes style.css can leave a
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visitor's browser silently serving the old stylesheet until they
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hard-refresh. Computed once at startup since the file is baked into the
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image and won't change while this process is running."""
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try:
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return hashlib.md5(Path(path).read_bytes()).hexdigest()[:8]
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except FileNotFoundError:
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return "0"
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templates.env.globals["static_version"] = _asset_version("app/static/css/style.css")
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@router.get("/")
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def dashboard(request: Request):
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return templates.TemplateResponse(request, "dashboard.html", {})
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@router.get("/plans")
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def plans_page(request: Request):
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return templates.TemplateResponse(request, "plans.html", {})
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@router.get("/settings")
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def settings_page(request: Request):
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return templates.TemplateResponse(
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request,
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"settings.html",
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{"use_mock_isolarcloud": settings.use_mock_isolarcloud, "isolarcloud_auth_mode": settings.isolarcloud_auth_mode},
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)
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