1 files changed, 6 insertions, 1 deletions
diff --git a/internal/httpclient/validate.go b/internal/httpclient/validate.go
index 881d3f699..5a6257288 100644
--- a/internal/httpclient/validate.go
+++ b/internal/httpclient/validate.go
@@ -38,7 +38,7 @@ func ValidateRequest(r *http.Request) error {
 		return fmt.Errorf("%w: empty url host", ErrInvalidRequest)
 	case r.URL.Scheme != "http" && r.URL.Scheme != "https":
 		return fmt.Errorf("%w: unsupported protocol %q", ErrInvalidRequest, r.URL.Scheme)
-	case strings.IndexFunc(r.Method, func(r rune) bool { return !httpguts.IsTokenRune(r) }) != -1:
+	case strings.IndexFunc(r.Method, isNotTokenRune) != -1:
 		return fmt.Errorf("%w: invalid method %q", ErrInvalidRequest, r.Method)
 	}
 
@@ -60,3 +60,8 @@ func ValidateRequest(r *http.Request) error {
 
 	return nil
 }
+
+// isNotTokenRune wraps IsTokenRune to inverse result.
+func isNotTokenRune(r rune) bool {
+	return !httpguts.IsTokenRune(r)
+}