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<?php
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namespace Aws\EndpointV2;
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use Aws\Api\Serializer\RestSerializer;
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use Aws\EndpointV2\Ruleset\RulesetEndpoint;
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use GuzzleHttp\Psr7\Uri;
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/**
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 * Set of helper functions used to set endpoints and endpoint
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 * properties derived from dynamic endpoint resolution.
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 *
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 * @internal
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 */
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trait EndpointV2SerializerTrait
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{
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    /**
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     * Applies a resolved endpoint, headers and any custom HTTP schemes provided
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     * in client configuration to options which are applied to the serialized request.
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     *
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     * @param $endpoint
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     * @param $headers
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     *
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     * @return void
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     */
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    private function setEndpointV2RequestOptions(
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        RulesetEndpoint $endpoint,
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        array &$headers
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    ): void
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    {
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        $this->applyHeaders($endpoint, $headers);
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        $resolvedUrl = $endpoint->getUrl();
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        $this->applyScheme($resolvedUrl);
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        $this->endpoint = $this instanceof RestSerializer
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            ? new Uri($resolvedUrl)
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            : $resolvedUrl;
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    }
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    /**
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     * Combines modeled headers and headers resolved from an endpoint object.
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     *
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     * @param $endpoint
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     * @param $headers
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     * @return void
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     */
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    private function applyHeaders(RulesetEndpoint $endpoint, array &$headers): void
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    {
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        if (!is_null($endpoint->getHeaders())) {
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           $headers = array_merge(
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               $headers,
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               $endpoint->getHeaders()
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           );
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        }
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    }
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    /**
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     * Applies custom HTTP schemes provided in client configuration.
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     *
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     * @param $resolvedUrl
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     * @return void
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     */
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    private function applyScheme(&$resolvedUrl): void
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    {
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        $resolvedEndpointScheme = parse_url($resolvedUrl, PHP_URL_SCHEME);
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        $scheme = $this->endpoint instanceof Uri
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            ? $this->endpoint->getScheme()
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            : parse_url($this->endpoint, PHP_URL_SCHEME);
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        if (!empty($scheme) && $scheme !== $resolvedEndpointScheme) {
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            $resolvedUrl = str_replace(
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                $resolvedEndpointScheme,
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                $scheme,
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                $resolvedUrl
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            );
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        }
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    }
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}