WeKnora deployment source with the reviewed wiki identity, summary and recovery fixes

internal/storageallowlist/allowlist.go

@@ -0,0 +1,84 @@
+package storageallowlist
+
+import (
+	"os"
+	"strings"
+)
+
+const AllowListEnv = "STORAGE_ALLOW_LIST"
+
+var supported = []string{"local", "minio", "cos", "tos", "s3", "oss", "ks3", "obs"}
+
+// Supported returns the canonical storage provider names in display order.
+func Supported() []string {
+	providers := make([]string, len(supported))
+	copy(providers, supported)
+	return providers
+}
+
+// AllowedMap returns which providers are permitted by STORAGE_ALLOW_LIST.
+func AllowedMap() map[string]bool {
+	raw := strings.TrimSpace(os.Getenv(AllowListEnv))
+	allowed := make(map[string]bool, len(supported))
+
+	if raw == "" {
+		for _, provider := range supported {
+			allowed[provider] = true
+		}
+		return allowed
+	}
+
+	for _, item := range strings.FieldsFunc(raw, func(r rune) bool {
+		switch r {
+		case ',', ';', '|', '\n', '\t', ' ':
+			return true
+		default:
+			return false
+		}
+	}) {
+		provider := strings.ToLower(strings.TrimSpace(item))
+		if provider == "" {
+			continue
+		}
+		for _, name := range supported {
+			if provider == name {
+				allowed[provider] = true
+				break
+			}
+		}
+	}
+
+	return allowed
+}
+
+// IsAllowed reports whether provider is permitted. Empty provider is treated as allowed.
+func IsAllowed(provider string) bool {
+	provider = strings.ToLower(strings.TrimSpace(provider))
+	if provider == "" {
+		return true
+	}
+	return AllowedMap()[provider]
+}
+
+// FirstAllowed returns the first supported provider allowed by STORAGE_ALLOW_LIST.
+func FirstAllowed() string {
+	allowed := AllowedMap()
+	for _, provider := range supported {
+		if allowed[provider] {
+			return provider
+		}
+	}
+	return ""
+}
+
+// AllowedList returns allowed providers in canonical order.
+func AllowedList() []string {
+	allowed := AllowedMap()
+	out := make([]string, 0, len(supported))
+	for _, provider := range supported {
+		if allowed[provider] {
+			out = append(out, provider)
+		}
+	}
+	return out
+}