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vendor/nelmio/cors-bundle/Options/ConfigProvider.php

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+<?php
+/*
+ * This file is part of the NelmioCorsBundle.
+ *
+ * (c) Nelmio <hello@nelm.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\CorsBundle\Options;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * Default CORS configuration provider.
+ *
+ * Uses the bundle's semantic configuration.
+ * Default settings are the lowest priority one, and can be relied upon.
+ */
+class ConfigProvider implements ProviderInterface
+{
+    protected $paths;
+    protected $defaults;
+
+    public function __construct(array $paths, array $defaults = [])
+    {
+        $this->defaults = $defaults;
+        $this->paths = $paths;
+    }
+
+    public function getOptions(Request $request): array
+    {
+        $uri = $request->getPathInfo() ?: '/';
+        foreach ($this->paths as $pathRegexp => $options) {
+            if (preg_match('{'.$pathRegexp.'}i', $uri)) {
+                $options = array_merge($this->defaults, $options);
+
+                // skip if the host is not matching
+                if (count($options['hosts']) > 0) {
+                    foreach ($options['hosts'] as $hostRegexp) {
+                        if (preg_match('{'.$hostRegexp.'}i', $request->getHost())) {
+                            return $options;
+                        }
+                    }
+
+                    continue;
+                }
+
+                return $options;
+            }
+        }
+
+        return $this->defaults;
+    }
+}

vendor/nelmio/cors-bundle/Options/ProviderInterface.php

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+<?php
+/*
+ * This file is part of the NelmioCorsBundle.
+ *
+ * (c) Nelmio <hello@nelm.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\CorsBundle\Options;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * CORS configuration provider interface.
+ *
+ * Can override CORS options for a particular path.
+ */
+interface ProviderInterface
+{
+    /**
+     * Returns CORS options for $request.
+     *
+     * Any valid CORS option will overwrite those of the previous ones.
+     * The method must at least return an empty array.
+     *
+     * All keys of the bundle's semantical configuration are valid:
+     * - bool allow_credentials
+     * - bool allow_origin
+     * - bool allow_headers
+     * - bool origin_regex
+     * - array allow_methods
+     * - array expose_headers
+     * - int max_age
+     *
+     * @return array CORS options
+     */
+    public function getOptions(Request $request): array;
+}

vendor/nelmio/cors-bundle/Options/Resolver.php

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+<?php
+/*
+ * This file is part of the NelmioCorsBundle.
+ *
+ * (c) Nelmio <hello@nelm.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+namespace Nelmio\CorsBundle\Options;
+
+use Symfony\Component\HttpFoundation\Request;
+
+/**
+ * CORS options resolver.
+ *
+ * Uses Cors providers to resolve options for an HTTP request
+ */
+class Resolver implements ResolverInterface
+{
+    /**
+     * CORS configuration providers, indexed by numerical priority
+     * @var ProviderInterface[][]
+     */
+    private $providers;
+
+    /**
+     * @param $providers ProviderInterface[]
+     */
+    public function __construct(array $providers = [])
+    {
+        $this->providers = $providers;
+    }
+
+    /**
+     * Resolves the options for $request based on {@see $providers} data
+     *
+     * @return array CORS options
+     */
+    public function getOptions(Request $request): array
+    {
+        $options = [];
+        foreach ($this->providers as $provider) {
+            $options[] = $provider->getOptions($request);
+        }
+
+        return array_merge(...$options);
+    }
+}

vendor/nelmio/cors-bundle/Options/ResolverInterface.php

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+<?php
+/*
+ * This file is part of the NelmioCorsBundle.
+ *
+ * (c) Nelmio <hello@nelm.io>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Nelmio\CorsBundle\Options;
+
+use Symfony\Component\HttpFoundation\Request;
+
+interface ResolverInterface
+{
+    /**
+     * Returns CORS options for $path
+     *
+     * @internal param string $path
+     */
+    public function getOptions(Request $request): array;
+}