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Informations about the package magento2-csp-split-header

Basecom_CspSplitHeader Magento 2 Module

[![Packagist][ico-version]][link-packagist] [![Software License][ico-license]](LICENSE) ![Supported Magento Versions][ico-compatibility]

[!IMPORTANT]
As of Magento 2.4.7 it is no longer possible to deactivate the Magento CSP module.

With a growing Content Security Policies (CSP) whitelist, the problem can arise that the headers Content-Security-Policy-Report-Only and/or Content-Security-Policy become so large that they exceed the maximum permitted size of a header field, causing the web server to not process the response any further.

The CSP mechanism allows multiple policies to be specified for a resource, including via the Content-Security-Policy header, the Content-Security-Policy-Report-Only header and a meta element [MDN]. Therefore, the headers can be specified more than once.

This is where the module comes into play. It implements an after method plugin for the method Magento\Csp\Model\Policy\Renderer\SimplePolicyHeaderRenderer::render, which replaces the existing CSP headers via the method \Magento\Framework\App\Response\HttpInterface::setHeader. The header is read, split so that the syntax remains valid, and replaced by the new headers. The result is a separate header for each directive, each of which should no longer exceed the maximum permitted length of the web server.

[!TIP] If the headers are too large even after splitting, try to identify unnecessary Magento modules and remove them.

Installation

  1. Install it into your Magento 2 project with composer:

  2. Enable module

Configuration

Config Default Value Description
basecom_csp_split_header/settings/header_splitting_enable 0 (disabled) enables (1) / disables (0) the splitting of the CSP header
basecom_csp_split_header/settings/max_header_size 8190 maximum allowed header field size

These values can be updated in the system configuration under Basecom -> Content Security Policy -> Enable.

Example

  1. CSP splitting disabled

  2. CSP splitting enabled

Contributing

Please see CONTRIBUTING for details.

Security

If you discover any security related issues, please email [email protected] instead of using the issue tracker.

License

The MIT License (MIT). Please see License File for more information.

Copyright

© 2024 basecom GmbH & Co. KG

All versions of magento2-csp-split-header with dependencies

PHP Build Version
Package Version
Requires php Version ~8.1
magento/framework Version *
magento/module-csp Version *
magento/module-config Version *
magento/module-backend Version *
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