Middleware Collector

Captures HTTP middleware stack execution — the before and after processing phases with timing and memory usage.

What It Captures

Field	Description
beforeStack	Middleware invoked before the action handler
actionHandler	The main action/controller handler
afterStack	Middleware invoked after the action handler

Each middleware entry contains:

Field	Description
name	Middleware class name
time	Execution timestamp
memory	Memory usage at this point
request	Request state (before stack)
response	Response state (after stack)

Data Schema

{
    "beforeStack": [
        {"name": "App\\Middleware\\AuthMiddleware", "time": 1711878000.100, "memory": 2097152, "request": "..."}
    ],
    "actionHandler": {
        "name": "App\\Controller\\UserController::index",
        "startTime": 1711878000.105,
        "request": "...",
        "response": "...",
        "endTime": 1711878000.120,
        "memory": 4194304
    },
    "afterStack": [
        {"name": "App\\Middleware\\CorsMiddleware", "time": 1711878000.121, "memory": 4194304, "response": "..."}
    ]
}

Summary (shown in debug entry list):

{
    "middleware": {
        "total": 5
    }
}

Contract

use AppDevPanel\Kernel\Collector\MiddlewareCollector;

$collector->collectBefore(
    name: 'App\\Middleware\\AuthMiddleware',
    time: microtime(true),
    memory: memory_get_usage(),
    request: $request,
);

$collector->collectAfter(
    name: 'App\\Middleware\\CorsMiddleware',
    time: microtime(true),
    memory: memory_get_usage(),
    response: $response,
);

INFO

MiddlewareCollectorAppDevPanel\Kernel\Collector\MiddlewareCollectorCaptures HTTP middleware stack execution data.final Kernel · class · implements SummaryCollectorInterface implements SummaryCollectorInterfaceAppDevPanel\Kernel\Collector\SummaryCollectorInterfaceSummary data collector responsibility is to collect summary data for a collector. Summary is used to display a list of previous requests and select one to display full info. Its data set is specific to the list and is reduced compared to full data collected in {@see CollectorInterface}.Kernel · interface · extends CollectorInterface and depends on TimelineCollectorAppDevPanel\Kernel\Collector\TimelineCollectorCollects Timeline data during application lifecycle.final Kernel · class · implements SummaryCollectorInterface.

How It Works

Framework adapters instrument the middleware pipeline:

• Yii 3: MiddlewareEventListenerAppDevPanel\Adapter\Yii3\Collector\Middleware\MiddlewareEventListenerListens to Yii middleware events and feeds normalized data to the framework-agnostic Kernel MiddlewareCollector.final Adapter/Yii3 · class listens to Yii middleware events
• Symfony: Kernel events (kernel.request, kernel.response, kernel.controller)
• Laravel: Middleware pipeline hooks

Debug Panel

• Middleware stack — visual before/after pipeline with action handler in the middle
• Timing — execution time for each middleware
• Memory tracking — memory usage delta across the pipeline