fix: use correct MIME types for image preview #491

2026-01-11T12:22:51Z

ZacharyZcR commented

2026-01-11 12:22:51 +00:00

(Migrated from github.com)

Summary

Replace image/* wildcard with specific MIME types in data URLs
Add MIME type mapping for common image formats (png, jpg, gif, webp, bmp, ico, tiff)

Root cause: data:image/*;base64,... uses a wildcard MIME type which is not valid in data URLs. Browsers require specific MIME types like image/png or image/jpeg.

Before: data:image/*;base64,{content} → browser fails to parse
After: data:image/png;base64,{content} → browser renders correctly

Related to #408

## Summary - Replace `image/*` wildcard with specific MIME types in data URLs - Add MIME type mapping for common image formats (png, jpg, gif, webp, bmp, ico, tiff) **Root cause**: `data:image/*;base64,...` uses a wildcard MIME type which is not valid in data URLs. Browsers require specific MIME types like `image/png` or `image/jpeg`. **Before**: `data:image/*;base64,{content}` → browser fails to parse **After**: `data:image/png;base64,{content}` → browser renders correctly Related to #408

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Reference: dennii/Termix#491