symfony · nicolas-grekas · Dec 19, 2025 · Dec 17, 2025 · smnandre · Dec 19, 2025
diff --git a/src/Symfony/Component/AssetMapper/ImportMap/BatchHttpClient.php b/src/Symfony/Component/AssetMapper/ImportMap/BatchHttpClient.php
@@ -0,0 +1,57 @@
+<?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\AssetMapper\ImportMap;
+
+use Symfony\Component\HttpClient\DecoratorTrait;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+use Symfony\Contracts\HttpClient\ResponseInterface;
+
+/**
+ * @internal
+ */
+class BatchHttpClient implements HttpClientInterface
+{
+    use DecoratorTrait;
+
+    private const BATCH_SIZE = 250;
+
+    private \WeakMap $pendingRequests;
+
+    public function request(string $method, string $url, array $options = []): ResponseInterface
+    {
+        $this->pendingRequests ??= new \WeakMap();
+        $pendingRequests = [];
+
+        foreach ($this->pendingRequests as $response => $_) {
+            if ($response->getInfo('http_code')) {
+                $this->pendingRequests->offsetUnset($response);
+            } else {
+                $pendingRequests[] = $response;
+            }
+        }
+
+        if (\count($pendingRequests) >= self::BATCH_SIZE) {
+            foreach ($this->client->stream($pendingRequests) as $response => $chunk) {
+                if (!$chunk->isTimeout() && $chunk->isFirst()) {
+                    $response->getStatusCode(); // ignore 3/4/5xx
+                    $this->pendingRequests->offsetUnset($response);
+                    break;
+                }
+            }
+        }
+
+        $response = $this->client->request($method, $url, $options);
+        $this->pendingRequests[$response] = true;
+
+        return $response;
+    }
+}
diff --git a/src/Symfony/Component/AssetMapper/ImportMap/ImportMapUpdateChecker.php b/src/Symfony/Component/AssetMapper/ImportMap/ImportMapUpdateChecker.php
@@ -11,16 +11,20 @@
 
 namespace Symfony\Component\AssetMapper\ImportMap;
 
+use Symfony\Component\HttpClient\HttpClient;
 use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 class ImportMapUpdateChecker
 {
     private const URL_PACKAGE_METADATA = 'https://registry.npmjs.org/%s';
 
+    private readonly HttpClientInterface $httpClient;
+
     public function __construct(
         private readonly ImportMapConfigReader $importMapConfigReader,
-        private readonly HttpClientInterface $httpClient,
+        ?HttpClientInterface $httpClient = null,
     ) {
+        $this->httpClient = new BatchHttpClient($httpClient ?? HttpClient::create());
     }
 
     /**

diff --git a/src/Symfony/Component/AssetMapper/ImportMap/ImportMapVersionChecker.php b/src/Symfony/Component/AssetMapper/ImportMap/ImportMapVersionChecker.php
@@ -21,14 +21,14 @@ class ImportMapVersionChecker
 {
     private const PACKAGE_METADATA_PATTERN = 'https://registry.npmjs.org/%package%/%version%';
 
-    private HttpClientInterface $httpClient;
+    private readonly HttpClientInterface $httpClient;
 
     public function __construct(
         private ImportMapConfigReader $importMapConfigReader,
         private RemotePackageDownloader $packageDownloader,
         ?HttpClientInterface $httpClient = null,
     ) {
-        $this->httpClient = $httpClient ?? HttpClient::create();
+        $this->httpClient = new BatchHttpClient($httpClient ?? HttpClient::create());
     }
 
     /**

diff --git a/src/Symfony/Component/AssetMapper/ImportMap/Resolver/JsDelivrEsmResolver.php b/src/Symfony/Component/AssetMapper/ImportMap/Resolver/JsDelivrEsmResolver.php
@@ -13,6 +13,7 @@
 
 use Symfony\Component\AssetMapper\Compiler\CssAssetUrlCompiler;
 use Symfony\Component\AssetMapper\Exception\RuntimeException;
+use Symfony\Component\AssetMapper\ImportMap\BatchHttpClient;
 use Symfony\Component\AssetMapper\ImportMap\ImportMapEntry;
 use Symfony\Component\AssetMapper\ImportMap\ImportMapType;
 use Symfony\Component\AssetMapper\ImportMap\PackageRequireOptions;
@@ -32,12 +33,12 @@ final class JsDelivrEsmResolver implements PackageResolverInterface
 
     private const ES_MODULE_SHIMS = 'es-module-shims';
 
-    private HttpClientInterface $httpClient;
+    private readonly HttpClientInterface $httpClient;
 
     public function __construct(
         ?HttpClientInterface $httpClient = null,
     ) {
-        $this->httpClient = $httpClient ?? HttpClient::create();
+        $this->httpClient = new BatchHttpClient($httpClient ?? HttpClient::create());
     }
 
     public function resolvePackages(array $packagesToRequire): array