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feat(namespace): add check function for namespace

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This commit is contained in:
Adrien Raffin-Caboisse
2022-02-23 11:07:24 +01:00
parent fe0b43eaaf
commit 45727dbb21
2 changed files with 77 additions and 5 deletions
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30
namespaces.go
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@@ -27,7 +27,7 @@ const (
labelHostnameLength = 63
)
var normalizeNamespaceRegex = regexp.MustCompile("[^a-z0-9-.]+")
var invalidCharsInNamespaceRegex = regexp.MustCompile("[^a-z0-9-.]+")
// Namespace is the way Headscale implements the concept of users in Tailscale
//
@@ -281,7 +281,7 @@ func NormalizeNamespaceName(name string) (string, error) {
name = strings.ToLower(name)
name = strings.ReplaceAll(name, "@", ".")
name = strings.ReplaceAll(name, "'", "")
name = normalizeNamespaceRegex.ReplaceAllString(name, "-")
name = invalidCharsInNamespaceRegex.ReplaceAllString(name, "-")
for _, elt := range strings.Split(name, ".") {
if len(elt) > labelHostnameLength {
@@ -295,3 +295,29 @@ func NormalizeNamespaceName(name string) (string, error) {
return name, nil
}
func CheckNamespaceName(name string) error {
if len(name) > labelHostnameLength {
return fmt.Errorf(
"Namespace must not be over 63 chars. %v doesn't comply with this rule: %w",
name,
errInvalidNamespaceName,
)
}
if strings.ToLower(name) != name {
return fmt.Errorf(
"Namespace name should be lowercase. %v doesn't comply with this rule: %w",
name,
errInvalidNamespaceName,
)
}
if invalidCharsInNamespaceRegex.MatchString(name) {
return fmt.Errorf(
"Namespace name should only be composed of lowercase ASCII letters numbers, hyphen and dots. %v doesn't comply with theses rules: %w",
name,
errInvalidNamespaceName,
)
}
return nil
}