没有注入Symfony2调试工具栏Symfony 2.8

Question

I am trying to make the web debug bar appear in Symfony 2.8 and I somehow cannot make it work.

My template has a closing Tag. Also WebDebugToolbarListener gets invoked but aborts on this condition:

     if (self::DISABLED === $this->mode
        || !$response->headers->has('X-Debug-Token')
        || $response->isRedirection()
        || ($response->headers->has('Content-Type') && false === strpos($response->headers->get('Content-Type'), 'html'))
        || 'html' !== $request->getRequestFormat()
        || false !== stripos($response->headers->get('Content-Disposition'), 'attachment;')
    ) {
        return;
    }

    $this->injectToolbar($response, $request);

I debugged and found that "X-Debug-Token" is NEVER included in the headers. That's why injectToolbar method is never invoked. When I comment the specific line || !$response->headers->has('X-Debug-Token') || !$response->headers->has('X-Debug-Token') the toolbar would show up, however I receive the Exception:

"Parameter "token" for route "_wdt" must match "[^/]++" ("" given) to generate a corresponding URL."

Also it's obviously the wrong way dealing with this problem.

What am I doing wrong? I am out of ideas.

Here is what I have configured:

#config_dev.yml
framework:
    router:
        resource: "%kernel.root_dir%/config/routing_dev.yml"
        strict_requirements: true
profiler: { only_exceptions: true }

web_profiler:
    toolbar: true
    intercept_redirects: false
    position: bottom

---

//app_dev.php
Debug::enable();

require_once __DIR__.'/../app/AppKernel.php';

$kernel = new AppKernel('dev', true);

---

//AppKernel.php
if (in_array($this->getEnvironment(), array('dev', 'test'))) {
    $bundles[] = new Symfony\Bundle\DebugBundle\DebugBundle();
    $bundles[] = new Symfony\Bundle\WebProfilerBundle\WebProfilerBundle();
    $bundles[] = new Sensio\Bundle\DistributionBundle\SensioDistributionBundle();
    $bundles[] = new Sensio\Bundle\GeneratorBundle\SensioGeneratorBundle();
}

---

#routing_dev.yml
_wdt:
    resource: "@WebProfilerBundle/Resources/config/routing/wdt.xml"
    prefix:   /_wdt

_profiler:
    resource: "@WebProfilerBundle/Resources/config/routing/profiler.xml"
    prefix:   /_profiler

_configurator:
    resource: "@SensioDistributionBundle/Resources/config/routing/webconfigurator.xml"
    prefix:   /_configurator

Answer 1

Apparently I had to enable profiler explicitely (which sets the X-Debug-Token). RTM for the win. I had never done this in the past though.

The key is to set only_exceptions: false . Otherwise the profiler would not collect any data and also won't set the X-Debug-Token and thus the toolbar would not attach. I have set this flag to true in the past because my cache directory was growing quite rapidly.

The enabled Flag is set to true for dev and test environments by default.

#config_dev.yml
framework:
    router:
        resource: "%kernel.root_dir%/config/routing_dev.yml"
        strict_requirements: true
    profiler: { only_exceptions: false }