Initial commit: Caddy MCP Server

validators.go

@@ -0,0 +1,57 @@
+package main
+
+import (
+	"fmt"
+	"regexp"
+	"strconv"
+	"strings"
+)
+
+func validateDomain(domain string) error {
+	if domain == "" {
+		return fmt.Errorf("domain cannot be empty")
+	}
+	domainRegex := regexp.MustCompile(`^(?:[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?\.)*[a-zA-Z0-9](?:[a-zA-Z0-9-]{0,61}[a-zA-Z0-9])?$`)
+	if !domainRegex.MatchString(domain) {
+		return fmt.Errorf("invalid domain format: %s", domain)
+	}
+	return nil
+}
+
+func validatePath(path string) error {
+	if path == "" {
+		return fmt.Errorf("path cannot be empty")
+	}
+	if strings.Contains(path, "..") {
+		return fmt.Errorf("path cannot contain parent directory references (..)")
+	}
+	if !strings.HasPrefix(path, "/") {
+		return fmt.Errorf("path must start with /")
+	}
+	return nil
+}
+
+func validatePort(port string) error {
+	if port == "" {
+		return fmt.Errorf("port cannot be empty")
+	}
+	p, err := strconv.Atoi(port)
+	if err != nil {
+		return fmt.Errorf("invalid port number: %s", port)
+	}
+	if p < 1 || p > 65535 {
+		return fmt.Errorf("port must be between 1 and 65535, got: %d", p)
+	}
+	return nil
+}
+
+func validateHeaderName(name string) error {
+	if name == "" {
+		return fmt.Errorf("header name cannot be empty")
+	}
+	headerRegex := regexp.MustCompile("^[a-zA-Z0-9!#$%&'*+\\-\\.^_`\\|~]+$")
+	if !headerRegex.MatchString(name) {
+		return fmt.Errorf("invalid header name format: %s (must be valid HTTP token characters only)", name)
+	}
+	return nil
+}