popertotsandSisyphus
0da7498ad7
Backend now stores AVIF, WebP, JPEG, and optional JXL variants for both full-size and thumbnail images. Database schema extended with 7 new columns. Image validation supports AVIF and JXL magic bytes. Comprehensive test coverage for all format URL fields and magic byte detection. Legacy single-URL images remain backward-compatible. Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent) Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>
40 lines
1.0 KiB
Go
40 lines
1.0 KiB
Go
package images
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import (
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"bytes"
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"fmt"
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)
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var allowedImageMagic = []struct {
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magic []byte
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ext string
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}{
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{[]byte{0xff, 0xd8, 0xff}, ".jpg"},
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{[]byte{0x89, 'P', 'N', 'G', '\r', '\n', 0x1a, '\n'}, ".png"},
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{[]byte{'G', 'I', 'F', '8', '7', 'a'}, ".gif"},
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{[]byte{'G', 'I', 'F', '8', '9', 'a'}, ".gif"},
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}
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func ValidateImageBytes(data []byte) (string, error) {
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if len(data) < 12 {
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return "", fmt.Errorf("file too small to be a valid image")
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}
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for _, m := range allowedImageMagic {
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if bytes.HasPrefix(data, m.magic) {
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return m.ext, nil
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}
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}
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if len(data) >= 12 && bytes.Equal(data[0:4], []byte("RIFF")) && bytes.Equal(data[8:12], []byte("WEBP")) {
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return ".webp", nil
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}
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if len(data) >= 12 && bytes.Equal(data[4:8], []byte("ftyp")) {
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if bytes.Equal(data[8:12], []byte("avif")) || bytes.Equal(data[8:12], []byte("avis")) {
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return ".avif", nil
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}
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if bytes.Equal(data[8:12], []byte("jxl ")) {
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return ".jxl", nil
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}
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}
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return "", fmt.Errorf("file is not a supported image type (jpeg, png, webp, gif, avif, jxl)")
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}
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