laravel remove csrf

Laravel is a popular PHP framework that has become a popular choice among professional developers and beginners alike. The Laravel framework implements CSRF protection to prevent cross-site request forgery attacks. However, in some cases, it is sometimes necessary to remove CSRF protection. This article will show you how to remove CSRF protection in Laravel.

1. What is CSRF protection

Cross-site request forgery, the English abbreviation of CSRF, is a common web attack. The attacker uses the victim's identity in the logged-in state to forge requests to achieve malicious operations. In order to prevent this kind of attack, Laravel implements CSRF protection function, which can protect web applications well.

2. Implementation of CSRF protection in Laravel

The implementation of CSRF protection in Laravel mainly involves the following three steps:

2.1. Generate CSRF token

Add the csrf_field directive in the HTML form. This directive will automatically generate a CSRF token and add it to the hidden field of the form.

<form>
@csrf
<input type="text" name="name">
<input type="submit" value="Submit">
</form>

2.2. Verify CSRF token

On the backend, Laravel will verify whether the requested CSRF token is legal. If it is illegal, an error message will be returned. In Laravel 5.6 and later versions, CSRF protection middleware is added by default, and all Post requests will undergo CSRF verification. If your request does not carry the CSRF token correctly, you will get the following error message:

TokenMismatchException in VerifyCsrfToken.php line 68:

2.3. Cross-site scripting attack protection

In order to prevent cross-site scripting attacks, you should follow the "escape "Output" principle, do not directly output the data provided by the user, but should process it before outputting it. For example, use the htmlentities or htmlspecialchars functions to escape HTML special characters.

The above is how to implement CSRF protection in Laravel. Below we will explain how to remove this protection.

3. How to remove CSRF protection in Laravel

If your web application does not require CSRF protection, you can also remove CSRF protection in Laravel. Below we will introduce two methods to remove CSRF protection.

3.1. Turn off CSRF protection middleware

By default, all Laravel Post requests will undergo CSRF verification. If you want to remove this verification, you can remove the CSRF protection middleware from the Middleware. The specific method is as follows:

Open the app/Http/Kernel.php file, find the web middleware group in the $middlewareGroups array, and delete the ['IlluminateFoundationHttpMiddlewareVerifyCsrfToken'] middleware from the array.

protected $middlewareGroups = [
    'web' => [
        AppHttpMiddlewareEncryptCookies::class,
        // IlluminateSessionMiddlewareAuthenticateSession::class,
        // IlluminateRoutingMiddlewareSubstituteBindings::class,
        // IlluminateFoundationHttpMiddlewareVerifyCsrfToken::class,
    ],

    'api' => [
        'throttle:60,1',
        'auth:api',
    ],
];

At this time, all Post requests will not undergo CSRF protection verification. Although CSRF protection can be removed, this also represents a certain security risk. Therefore, it is recommended to only enable it in strict testing environments.

3.2. Manually ignore CSRF protection

If you turn off the CSRF protection middleware globally, you can manually ignore CSRF protection verification in a specific route or controller. The specific method is as follows:

In the route or controller method that needs to be released, use the withoutMiddleware method:

Route::post('route', function () {
    //
})->withoutMiddleware([IlluminateFoundationHttpMiddlewareVerifyCsrfToken::class]);

This method can be used in some special cases, but it is not recommended in all Routers all use this method.

To sum up, implementing CSRF protection in Laravel is a good security measure. It is not recommended to remove CSRF protection when it is unnecessary. If necessary, you can remove CSRF protection through the above methods. Of course, in actual project development, please use it with caution according to the actual situation.

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