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<?php
namespace Http\Client\Common\Plugin;
use Http\Client\Common\Plugin;
use Psr\Http\Message\RequestInterface;
/**
* Set header to default value if it does not exist.
*
* If a given header already exists the value wont be replaced and the request wont be changed.
*
* @author Soufiane Ghzal <sghzal@gmail.com>
*/
final class HeaderDefaultsPlugin implements Plugin
{
/**
* @var array
*/
private $headers = [];
/**
* @param array $headers Hashmap of header name to header value
*/
public function __construct(array $headers)
{
$this->headers = $headers;
}
/**
* {@inheritdoc}
*/
public function handleRequest(RequestInterface $request, callable $next, callable $first)
{
foreach ($this->headers as $header => $headerValue) {
if (!$request->hasHeader($header)) {
$request = $request->withHeader($header, $headerValue);
}
}
return $next($request);
}
}
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