[HttpClient] cURL: Unable to limit connection timeout #48513
Description
Symfony version(s) affected
4.4.x and higher
Description
In #33022 the CURL_CONNECTTIMEOUT_MS was removed but it was not added to the allow list of curl.extra again. As such its not possible to set this setting, causing the timeout / max_duration option to be used when connecting to a host that is not available (port not open).
See #47246 (comment)
When not being able to distinguish between connection timeout and max duration, it is not possible to set a reasonable timeout in order to let requests fail fast on connection issues and still allow requests to take quite some time to finish overall. Especially in combination with a retry strategy this is a big problem if you do not want to let users wait for a long time when a host is unavailable.
How to reproduce
<?php
use Symfony\Component\HttpClient\HttpClient;
use Symfony\Component\HttpClient\Exception\TimeoutException;
require_once __DIR__ . '/vendor/autoload.php';
$client = HttpClient::create();
var_dump(get_class($client));
$ts = hrtime(true);
try {
$response = $client->request(
'GET',
'http://172.67.72.38:1080',
options: ['timeout' => 3, 'max_duration' => 10]
);
$messages = $response->toArray();
} catch (TimeoutException $e) {
var_dump($e->getMessage());
}
echo "Duration: " . ((hrtime(true) - $ts) / 1e+6) . "\n";
/*
string(43) "Symfony\Component\HttpClient\CurlHttpClient"
string(53) "Idle timeout reached for "http://172.67.72.38:1080/"."
Duration: 3003.314591
*/
$h = curl_init('http://172.67.72.38:1080');
curl_setopt_array($h, [
CURLOPT_CONNECTTIMEOUT => 2,
CURLOPT_TIMEOUT => 10,
CURLOPT_VERBOSE => true,
]);
curl_exec($h);
/*
* Trying 172.67.72.38:1080...
* After 2000ms connect time, move on!
* connect to 172.67.72.38 port 1080 failed: Connection timed out
* Connection timeout after 2001 ms
* Closing connection 0
*
*/Possible Solution
Allow setting CURLOPT_CONNECTTIMEOUT and CURLOPT_CONNECTTIMEOUT_MS via curl.extra.