브런치 병합 devfront 에러 수정

backend/internal/service/hydra_admin_service.go

@@ -597,3 +597,34 @@ func (s *HydraAdminService) AcceptLoginRequest(ctx context.Context, challenge st
 
 	return &AcceptLoginRequestResponse{RedirectTo: hydraResp.RedirectTo}, nil
 }
+
+func (s *HydraAdminService) IntrospectToken(ctx context.Context, token string) (map[string]interface{}, error) {
+	endpoint := fmt.Sprintf("%s/admin/oauth2/introspect", strings.TrimRight(s.AdminURL, "/"))
+
+	data := url.Values{}
+	data.Set("token", token)
+
+	req, err := http.NewRequestWithContext(ctx, http.MethodPost, endpoint, strings.NewReader(data.Encode()))
+	if err != nil {
+		return nil, err
+	}
+	req.Header.Set("Content-Type", "application/x-www-form-urlencoded")
+
+	resp, err := s.HttpClient().Do(req)
+	if err != nil {
+		return nil, err
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode >= 300 {
+		body, _ := io.ReadAll(io.LimitReader(resp.Body, 2048))
+		return nil, fmt.Errorf("hydra admin: introspect failed status=%d body=%s", resp.StatusCode, string(body))
+	}
+
+	var result map[string]interface{}
+	if err := json.NewDecoder(resp.Body).Decode(&result); err != nil {
+		return nil, err
+	}
+
+	return result, nil
+}