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utils.go
48 lines (41 loc) · 852 Bytes
/
utils.go
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package redis
import (
"strings"
"github.com/miekg/dns"
)
func Key(dn, prefix string) string {
labels := dns.SplitDomainName(dn)
for i, j := 0, len(labels)-1; i < j; i, j = i+1, j-1 {
labels[i], labels[j] = labels[j], labels[i]
}
if prefix != "" {
labels = append([]string{prefix}, labels...)
}
return strings.Join(labels, ":")
}
func AnyKey(key string) string {
parts := strings.Split(key, ":")
parts[len(parts)-1] = "*"
return strings.Join(parts, ":")
}
func IsAnyKey(key string) bool {
return strings.HasSuffix(key, "*")
}
// Split255 splits a string into 255 byte chunks.
func Split255(s string) []string {
if len(s) < 255 {
return []string{s}
}
sx := []string{}
p, i := 0, 255
for {
if i <= len(s) {
sx = append(sx, s[p:i])
} else {
sx = append(sx, s[p:])
break
}
p, i = p+255, i+255
}
return sx
}