fix: import cycle issues

server/validators/url.go

@@ -0,0 +1,49 @@
+package validators
+
+import (
+	"regexp"
+	"strings"
+
+	"github.com/authorizerdev/authorizer/server/constants"
+	"github.com/authorizerdev/authorizer/server/memorystore"
+	"github.com/authorizerdev/authorizer/server/parsers"
+)
+
+// IsValidOrigin validates origin based on ALLOWED_ORIGINS
+func IsValidOrigin(url string) bool {
+	allowedOrigins, err := memorystore.Provider.GetSliceStoreEnvVariable(constants.EnvKeyAllowedOrigins)
+	if err != nil {
+		allowedOrigins = []string{"*"}
+	}
+	if len(allowedOrigins) == 1 && allowedOrigins[0] == "*" {
+		return true
+	}
+
+	hasValidURL := false
+	hostName, port := parsers.GetHostParts(url)
+	currentOrigin := hostName + ":" + port
+
+	for _, origin := range allowedOrigins {
+		replacedString := origin
+		// if has regex whitelisted domains
+		if strings.Contains(origin, "*") {
+			replacedString = strings.Replace(origin, ".", "\\.", -1)
+			replacedString = strings.Replace(replacedString, "*", ".*", -1)
+
+			if strings.HasPrefix(replacedString, ".*") {
+				replacedString += "\\b"
+			}
+
+			if strings.HasSuffix(replacedString, ".*") {
+				replacedString = "\\b" + replacedString
+			}
+		}
+
+		if matched, _ := regexp.MatchString(replacedString, currentOrigin); matched {
+			hasValidURL = true
+			break
+		}
+	}
+
+	return hasValidURL
+}