48 lines
1.1 KiB
Go
48 lines
1.1 KiB
Go
package fs
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import (
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"path/filepath"
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"strings"
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"github.com/gabriel-vasile/mimetype"
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)
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const (
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MimeTypeUnknown = ""
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MimeTypeJpeg = "image/jpeg"
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MimeTypePng = "image/png"
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MimeTypeGif = "image/gif"
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MimeTypeBitmap = "image/bmp"
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MimeTypeTiff = "image/tiff"
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MimeTypeDNG = "image/dng"
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MimeTypeAVIF = "image/avif"
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MimeTypeHEIC = "image/heic"
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MimeTypeWebP = "image/webp"
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MimeTypeXML = "text/xml"
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MimeTypeJSON = "application/json"
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)
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// Set mime detection read limit.
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func init() {
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mimetype.SetLimit(1024)
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}
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// MimeType returns the mime type of a file, or an empty string if it could not be detected.
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func MimeType(filename string) (mimeType string) {
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// Workaround, since "image/dng" cannot be recognized yet.
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if ext := strings.ToLower(filepath.Ext(filename)); ext == "" {
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// Continue.
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} else if Extensions[ext] == ImageDNG {
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return MimeTypeDNG
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} else if Extensions[ext] == ImageAVIF {
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return MimeTypeAVIF
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}
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if t, err := mimetype.DetectFile(filename); err != nil {
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return MimeTypeUnknown
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} else {
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mimeType, _, _ = strings.Cut(t.String(), ";")
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}
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return mimeType
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}
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