$this class: Stack\StackedHttpKernel
$this->app class: Drupal\Core\StackMiddleware\NegotiationMiddleware
app 文件: /www/wwwroot/wjmlt.com/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php
app handle 定义类: Drupal\Core\StackMiddleware\NegotiationMiddleware
app handle 文件: /www/wwwroot/wjmlt.com/web/core/lib/Drupal/Core/StackMiddleware/NegotiationMiddleware.php
app handle 开始行: 41
app handle 结束行: 70

NegotiationMiddleware
$this->app = Drupal\Core\StackMiddleware\ReverseProxyMiddleware
#0 /www/wwwroot/wjmlt.com/vendor/stack/builder/src/Stack/StackedHttpKernel.php(43): Drupal\Core\StackMiddleware\NegotiationMiddleware->handle()
#1 /www/wwwroot/wjmlt.com/web/core/lib/Drupal/Core/DrupalKernel.php(717): Stack\StackedHttpKernel->handle()
#2 /www/wwwroot/wjmlt.com/web/index.php(20): Drupal\Core\DrupalKernel->handle()