recovery: recuperation commit local orphelin (master jamais pousse) - html-to-png-puppeteer.md
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# HTML vers PNG : Rendu headless Puppeteer / Chromium
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**Contexte** : html2canvas echoue dans les iframes sandbox (Claude.ai, widgets).
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Polices Google Fonts et SVG complexes bloques par CORS.
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**Solution** : rendu serveur avec Chromium headless.
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---
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## Approche 1 - Claude bash_tool
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### Installation (une seule fois par session)
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### Script render.mjs
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**Pieges critiques :**
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- Entry point : lib/puppeteer/puppeteer.js (pas lib/esm/)
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- page.waitForTimeout() supprime en v25+ => setTimeout natif
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- --no-sandbox obligatoire dans container Claude
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- networkidle0 + 2s = polices externes chargees
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---
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## Approche 2 - NAS via Gotenberg (port 3001, deja deploye)
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Gotenberg embarque Chromium. HTML -> PDF puis PDF -> PNG Pillow.
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Ou via noeud HTTP Request n8n (multipart/form-data vers Gotenberg).
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---
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## Cas valide (2026-06-21)
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Carte felicitations Bac 2026 - HTML/SVG 680x680px + Google Fonts.
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Resultat : PNG 1360x1360px (137 Ko), upload Facebook direct.
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**Regle absolue** : html2canvas = NON iframe sandbox.
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Puppeteer (Claude) ou Gotenberg (NAS) = OUI.
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