38 lines
712 B
Go
38 lines
712 B
Go
package clean
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import (
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"strings"
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"unicode"
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)
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// FileName removes invalid character from a filename string.
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func FileName(s string) string {
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if s == "" || reject(s, 512) || strings.Contains(s, "/") || strings.Contains(s, "..") {
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return ""
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}
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// Trim whitespace.
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s = strings.TrimSpace(s)
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// Remove non-printable and other potentially problematic characters.
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// The following characters must never be used in a filename: / \ > < | : &
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s = strings.Map(func(r rune) rune {
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if !unicode.IsPrint(r) {
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return -1
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}
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switch r {
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case '~', '/', '\\', ':', '|', '"', '?', '*', '<', '>', '{', '}':
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return -1
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default:
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return r
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}
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}, s)
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if s == "." || s == ".." {
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return ""
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}
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return s
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}
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