Félix Malfait
67ae17961e
## Summary Fixes #16900 - MS Office documents (doc, docx, ppt, pptx, xls, xlsx, odt) cannot be previewed when hosted on local/private networks. ## Problem Microsoft's Office Online viewer (`view.officeapps.live.com`) requires documents to be publicly accessible from the internet. For self-hosted Twenty instances or local development, files are not reachable by Microsoft's servers, causing the viewer to fail with "An error occurred". ## Solution Detect private/local URLs upfront and show a helpful message with a download button instead of letting the viewer fail silently. **Detected private URLs:** - `localhost`, `127.0.0.1`, `[::1]` - Private IP ranges: `10.x.x.x`, `172.16-31.x.x`, `192.168.x.x` - Local domain patterns: `.local`, `.localhost`, `.internal` ## Alternatives Explored (that don't work) We investigated more sophisticated detection approaches: 1. **postMessage events** - Microsoft's viewer doesn't send any error messages we can listen to 2. **Fetching the embed URL** - Blocked by CORS (Microsoft doesn't set `Access-Control-Allow-Origin`) 3. **Reading iframe content** - Cross-origin restrictions prevent JavaScript access The URL-based detection is the most reliable approach for catching the common cases where preview will definitely fail. ## Testing 1. Upload an Office file (docx, pptx, xlsx) on a local Twenty instance 2. Try to preview it 3. Should see "This file cannot be previewed because it is hosted locally" with a Download button
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Personalize layouts with filters, sort, group by, kanban and table views
Customize your objects and fields
Create and manage permissions with custom roles
Automate workflow with triggers and actions
Emails, calendar events, files, and more
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