有条件地运行中间件-Laravel [英] Run a middleware on condition - Laravel

问题描述

我有一个中间件，可以检查请求中的特定标头参数，并根据该参数发送回响应.

I have a middleware that checks for a specific header parameter in the request and sends back a response based on that.

但是我遇到的问题是我不希望这个中间件总是在Controller的某个函数上运行.我希望如果条件在函数(例如:存储函数)中成立，则中间件将运行.

But the problem I have is that I don't want this middleware run always on a function in my Controller. I want that middleware runs if a condition gets true in a function (for example: store function).

我该如何实现?

推荐答案

在触发控制器操作之前，将调用中间件.因此，不可能基于动作内部的条件来执行中间件.但是，可以有条件地执行中间件:

Middlewares are called before hitting an controller action. So its not possible to execute a middleware based on a condition inside an action. However, it is possible to conditional execution of middleware:

您可以将条件添加到请求对象(隐藏字段或类似字段)

You can add the condition to the request object (hidden field or similar)

public function handle($request, Closure $next)
{
    // Check if the condition is present and set to true
    if ($request->has('condition') && $request->condition == true)) {
        //
    }

    // if not, call the next middleware
    return $next($request);
}

通过参数

要将参数传递给中间件，必须在路由定义中进行设置.定义路由，并在中间件名称后添加:和条件值(在此示例中为boolean).

Via parameter

To pass a parameter to the middleware, you have to set it in the route definition. Define the route and append a : with the value of the condition (in this example a boolean) to the name of the middleware.

routes/web.php

routes/web.php

Route::post('route', function () {
//
})->middleware('FooMiddleware:true');

FooMiddleware

FooMiddleware

public function handle($request, Closure $next, $condition)
{
    // Check if the condition is present and set to true
    if ($condition == true)) {
        //
    }

    // if not, call the next middleware
    return $next($request);
}

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