+ private function resolveHost(RequestInterface $request, array $options)
+ {
+ $uri = $request->getUri();
+
+ if (isset($options['force_ip_resolve']) && !filter_var($uri->getHost(), FILTER_VALIDATE_IP)) {
+ if ('v4' === $options['force_ip_resolve']) {
+ $records = dns_get_record($uri->getHost(), DNS_A);
+ if (!isset($records[0]['ip'])) {
+ throw new ConnectException(sprintf("Could not resolve IPv4 address for host '%s'", $uri->getHost()), $request);
+ }
+ $uri = $uri->withHost($records[0]['ip']);
+ } elseif ('v6' === $options['force_ip_resolve']) {
+ $records = dns_get_record($uri->getHost(), DNS_AAAA);
+ if (!isset($records[0]['ipv6'])) {
+ throw new ConnectException(sprintf("Could not resolve IPv6 address for host '%s'", $uri->getHost()), $request);
+ }
+ $uri = $uri->withHost('[' . $records[0]['ipv6'] . ']');
+ }
+ }
+
+ return $uri;
+ }
+