[增添]添加了datasource的setting数据库以及默认值

vendor/symfony/html-sanitizer/Visitor/AttributeSanitizer/AttributeSanitizerInterface.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HtmlSanitizer\Visitor\AttributeSanitizer;
+
+use Symfony\Component\HtmlSanitizer\HtmlSanitizerConfig;
+
+/**
+ * Implements attribute-specific sanitization logic.
+ *
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+interface AttributeSanitizerInterface
+{
+    /**
+     * Returns the list of element names supported, or null to support all elements.
+     *
+     * @return list<string>|null
+     */
+    public function getSupportedElements(): ?array;
+
+    /**
+     * Returns the list of attributes names supported, or null to support all attributes.
+     *
+     * @return list<string>|null
+     */
+    public function getSupportedAttributes(): ?array;
+
+    /**
+     * Returns the sanitized value of a given attribute for the given element.
+     */
+    public function sanitizeAttribute(string $element, string $attribute, string $value, HtmlSanitizerConfig $config): ?string;
+}

vendor/symfony/html-sanitizer/Visitor/AttributeSanitizer/UrlAttributeSanitizer.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HtmlSanitizer\Visitor\AttributeSanitizer;
+
+use Symfony\Component\HtmlSanitizer\HtmlSanitizerConfig;
+use Symfony\Component\HtmlSanitizer\TextSanitizer\UrlSanitizer;
+
+/**
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+final class UrlAttributeSanitizer implements AttributeSanitizerInterface
+{
+    public function getSupportedElements(): ?array
+    {
+        // Check all elements for URL attributes
+        return null;
+    }
+
+    public function getSupportedAttributes(): ?array
+    {
+        return ['src', 'href', 'lowsrc', 'background', 'ping'];
+    }
+
+    public function sanitizeAttribute(string $element, string $attribute, string $value, HtmlSanitizerConfig $config): ?string
+    {
+        if ('a' === $element) {
+            return UrlSanitizer::sanitize(
+                $value,
+                $config->getAllowedLinkSchemes(),
+                $config->getForceHttpsUrls(),
+                $config->getAllowedLinkHosts(),
+                $config->getAllowRelativeLinks(),
+            );
+        }
+
+        return UrlSanitizer::sanitize(
+            $value,
+            $config->getAllowedMediaSchemes(),
+            $config->getForceHttpsUrls(),
+            $config->getAllowedMediaHosts(),
+            $config->getAllowRelativeMedias(),
+        );
+    }
+}