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<?php
namespace Aura\Router\Rule;
use Aura\Router\Route;
use Psr\Http\Message\ServerRequestInterface;
// must match **all** headers
class Headers
{
/**
*
* Checks that header values match their related regular expressions, and
* captures the headers as attributes.
*
* @param ServerRequestInterface $request The HTTP request.
*
* @param Route $route The route.
*
* @return bool True on success, false on failure.
*
*/
public function __invoke(ServerRequestInterface $request, Route $route)
{
$routeHeaders = $route->headers;
if (! $routeHeaders) {
return true;
}
$requestHeaders = $request->getHeaders();
$attributes = [];
foreach ($routeHeaders as $name => $regex) {
$match = $this->match($requestHeaders, $name, $regex);
if ($match === false) {
return false;
}
$attributes[$name] = $match;
}
$route->addAttributes($attributes);
return true;
}
/**
*
* Does a header value match a regex?
*
* @param $headers The array of all request headers.
*
* @param string $name The header name to look for.
*
* @param string $regex The regex to match against.
*
* @return string The match.
*
*/
protected function match($headers, $name, $regex)
{
$name = strtolower($name);
if (! isset($headers[$name])) {
return false;
}
foreach ($headers[$name] as $value) {
if (preg_match($regex, $value, $matches)) {
return $value;
}
}
return false;
}
}
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