[Bug]: Client HTTP options can only be scalars

[clapas]

Expected behavior

I should be able to set the 'Authorization' header in my Pimcore Elasticsearch client.

Actual behavior

The following configuration throws an error 'Invalid type for path "pimcore_elasticsearch_client.es_clients.default.http_options.headers". Expected "scalar", but got "array".':

pimcore_elasticsearch_client:
    es_clients:
        default:
            hosts: '%elastic.hosts%'
            http_options:
                headers:
                    Authorization: 'ApiKey OW5tRm1wa...lYTNTdw=='

If I use a scalar, e.g:

pimcore_elasticsearch_client:
    es_clients:
        default:
            hosts: '%elastic.hosts%'
            http_options:
                headers: 'Authorization: ApiKey OW5tRm1wa...YTNTdw=='

then the error is 'Symfony\Component\HttpClient\CurlHttpClient::normalizeHeaders(): Argument #1 ($headers) must be of type array, string given'.

So, the configuration expects each HTTP option to be a scalar, but the HTTP client expects an array for some options, like headers.

Steps to reproduce

Use any of the above configurations and trigger container compilation, e.g. simply run bin/console cache:clear.

[clapas]

The following change fixes the issue for me:

--- vendor/pimcore/elasticsearch-client/src/DependencyInjection/Configuration.php       2025-10-01 09:06:30.772800622 +0200
+++ src/DependencyInjection/Configuration.php      2024-12-10 10:06:15.000000000 +0100
@@ -66,7 +66,7 @@
                             ->info('Enable or disable the SSL verification (default: true)')
                         ->end()
                         ->arrayNode('http_options')
-                            ->prototype('scalar')->end()
+                            ->prototype('variable')->end()
                             ->info('List of http client options')
                         ->end()
                         ->scalarNode('cloud_id')