Question

我的服务器正在运行Apache，FPM / FastCGI和PHP 5.5.30。

我有Laravel 5.0框架和Guzzle来管理不同类型的HTTP请求。

在Guzzle之前我使用Rolling-Curl在paraller中发出请求。我之所以将Rolling-Curl改为Guzzle的原因是我随机获得了504个网关错误，但经过几次测试后我注意到我甚至用Guzzle得到了它。

网关错误总是在40秒后发生并且随机发生。如果我多次击中F5（刷新）它会消失，但可能会再次发生。

以下是我的代码段

$feeds = Feeds::where('active', '=', '1')->lists('url');  

$client = new \GuzzleHttp\Client();

$requests = array();

foreach($feeds AS $feed)
{
  $requests[] = $client->createRequest('GET', $feed);
}

$pool = new Pool($client, $requests, [
  'pool_size' => '5',
  'timeout' => '120',
  'connect_timeout' => '120',
  'complete' => function (CompleteEvent $event) {
    echo 'Completed request to ' . $event->getRequest()->getUrl() . " - ". $event->getResponse()->getStatusCode() . "\n";
    //echo 'Response: ' . $event->getResponse()->getBody() . "\n\n";
  },       
  'error' => function (ErrorEvent $event) {
      echo 'Request failed: ' . $event->getRequest()->getUrl() . "\n";
      echo $event->getException();
  }
]);


$pool->wait();

echo "...done in " . (microtime(true) - $start);
?>

$feeds从数据库获取100个RSS URL，我的池一次获得最多5个Feed的内容。

Answer 1

您是否可以发布您获得的确切错误，并可能确定代码行，指出抛出异常的位置？我认为您可以单独或组合使用两件事来解决错误：

在您的池启动选项中添加'rejected'功能以处理失败的请求，请参阅Guzzle documentation

如果仅try {} catch {} block选项没有修复错误，请将代码行包裹在'rejected' function中

请参阅下面修改的代码以包含我的建议：

$feeds = Feeds::where('active', '=', '1')->lists('url');  

$client = new \GuzzleHttp\Client();

$requests = array();

foreach($feeds AS $feed)
{
    $requests[] = $client->createRequest('GET', $feed);
}

$pool = new Pool($client, $requests, [
  'pool_size' => '5',
  'timeout' => '120',
  'connect_timeout' => '120',
  'complete' => function (CompleteEvent $event) {
    echo 'Completed request to ' . $event->getRequest()->getUrl() . " - ". $event->getResponse()->getStatusCode() . "\n";
    //echo 'Response: ' . $event->getResponse()->getBody() . "\n\n";
  },       
  'error' => function (ErrorEvent $event) {
      echo 'Request failed: ' . $event->getRequest()->getUrl() . "\n";
      echo $event->getException();
   },
   //add the 'rejected' function
   'rejected' => function ($reason, $index) {
       //handle failed requests here
   },
]);

//throw in the try{} catch {} block if the 'rejected' function is not fixing the 504 error
try {
    //your code goes here...I suspect it's the $pool->wait()
    $promise = $pool->promise(); //I included this line from the Guzzle documentation
    $promise->wait();
} catch (ServerException $e) {
    //Catch exception for 504 error here; you probabbly want to retry recursively a number of times before giving up...
}

echo "...done in " . (microtime(true) - $start);

40秒后随机获得504网关超时

1 个答案: