<?php
declare(strict_types=1);
namespace Http\Client\Common\Plugin;
use Http\Client\Common\Plugin;
use Http\Promise\Promise;
use Psr\Http\Message\RequestInterface;
/**
* Append headers to the request.
*
* If the header already exists the value will be appended to the current value.
*
* This only makes sense for headers that can have multiple values like 'Forwarded'
*
* @see https://en.wikipedia.org/wiki/List_of_HTTP_header_fields
*
* @author Soufiane Ghzal <sghzal@gmail.com>
*/
final class HeaderAppendPlugin implements Plugin
{
/**
* @var array
*/
private $headers;
/**
* @param array $headers Hashmap of header name to header value
*/
public function __construct(array $headers)
{
$this->headers = $headers;
}
public function handleRequest(RequestInterface $request, callable $next, callable $first): Promise
{
foreach ($this->headers as $header => $headerValue) {
$request = $request->withAddedHeader($header, $headerValue);
}
return $next($request);
}
}
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