photoprism/pkg/sanitize/log.go

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package sanitize
import (
"fmt"
"strings"
"unicode"
)
// Log sanitizes strings created from user input in response to the log4j debacle.
func Log(s string) string {
if reject(s, 512) {
return "?"
}
// Trim quotes, tabs, and newline characters.
s = strings.Trim(s, " '\"“`\t\n\r")
// 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 '\''
case '\\', '$', '<', '>', '{', '}':
return '?'
default:
return r
}
}, s)
// Empty?
if s == "" || strings.ContainsAny(s, " ") {
return fmt.Sprintf("'%s'", s)
}
return s
}
// LogLower sanitizes strings created from user input and converts them to lowercase.
func LogLower(s string) string {
return Log(strings.ToLower(s))
}