photoprism/pkg/clean/filename.go

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package clean
import (
"strings"
"unicode"
)
// FileName removes invalid character from a filename string.
func FileName(s string) string {
if s == "" || reject(s, 512) || strings.Contains(s, "/") || strings.Contains(s, "..") {
return ""
}
// Trim whitespace.
s = strings.TrimSpace(s)
// Remove non-printable and other potentially problematic characters.
s = strings.Map(func(r rune) rune {
if !unicode.IsPrint(r) {
return -1
}
switch r {
case '~', '/', '\\', ':', '|', '"', '?', '*', '<', '>', '{', '}':
return -1
default:
return r
}
}, s)
if s == "." || s == ".." {
return ""
}
return s
}