CutyCapt冻结

Question

对于我的新应用程序，我想提供网站的截图。我有一个超过一百万个域名的列表。

现在，我创建了一个小php脚本，并从命令行在屏幕上运行它。它工作得很好，但脚本有时会挂起，因为进程被冻结了(由于某种原因无法截图？)

在我自己重新启动脚本之前，我可以尝试不停止它的解决方案是什么？

Answer 1

我在Windows上遇到了这个问题。这是我的解决方案。

我使用killProcess for windows

$cmd="$path/CutyCapt.exe --js-can-open-windows=off --max-wait=60000 --url=\"http://$url\" --out=\"$fname\"";

$descriptorspec = array(
   0 => array("pipe", "r"),  // stdin is a pipe that the child will read from
   1 => array("pipe", "w"),  // stdout is a pipe that the child will write to
   2 => array("pipe", "w", "a") // stderr is a file to write to
);

$process = proc_open($cmd,$descriptorspec,$pipes);
if(!is_resource($process)) {
    throw new Exception('Exec could not be started.');
}

//we wwait upto 1 min
$sec=0;
while(1)
{
    sleep(1);
    $status = proc_get_status($process);
    if(!$status["running"]) 
        break;
    echo $sec++.' ';flush();
    if($sec>60)
        break;
}
if($status["running"])
{
    system("KillProcess.exe CutyCapt.exe");    
}
proc_close($process);

if($status["running"])
{
    echo ("CutyCapt can't save image!");
    @unlink($fname);
    return false;
}

Answer 2

首先，你需要运行另一个线程来确保它会杀死cutycapt本身。计时器在这种情况下不工作，因为它是由QT的事件循环满引起的。

    class ThreadTimer : public QThread
    {
         Q_OBJECT
     public:
     protected:
     private:
         void run();
    };
    void ThreadTimer::run()
    {
            QThread::currentThread()->setPriority(QThread::HighPriority);
            int timeout = 180;//how many seconds you want to time out
            while(timeout > 0){
                sleep(10);
                timeout = timeout - 10;
            }

            qCritical() << "WARNING:Force quit by timer!";

            qint64 pid = QCoreApplication::applicationPid();
            QProcess::startDetached("kill -9 " + QString::number(pid));
    }

我也推荐这个。我们已经测试了150万个网站，一切正常。您需要自己获取一个API密钥。

    <?php
    $apikey = "854412b0648e9338";
    $api_url = "http://api.page2images.com/restfullink";

    function call_p2i()
    {
        global $apikey, $api_url;
        // URL can be those formats: http://www.google.com https://google.com google.com and www.google.com
        $url = "http://www.google.com";
        $device = 0; // 0 - iPhone4, 1 - iPhone5, 2 - Android, 3 - WinPhone, 4 - iPad, 5 - Android Pad, 6 - Desktop
        $loop_flag = TRUE;
        $timeout = 120; // timeout after 120 seconds
        set_time_limit($timeout+10);
        $start_time = time();
        $timeout_flag = false;

        while ($loop_flag) {
            // We need call the API until we get the screenshot or error message
            try {
                $para = array(
                    "p2i_url" => $url,
                    "p2i_key" => $apikey,
                    "p2i_device" => $device
                );
                // connect page2images server
                $response = connect($api_url, $para);

                if (empty($response)) {
                    $loop_flag = FALSE;
                    // something error
                    echo "something error";
                    break;
                } else {
                    $json_data = json_decode($response);
                    if (empty($json_data->status)) {
                        $loop_flag = FALSE;
                        // api error
                        break;
                    }
                }
                switch ($json_data->status) {
                    case "error":
                        // do something to handle error
                        $loop_flag = FALSE;
                        echo $json_data->errno . " " . $json_data->msg;
                        break;
                    case "finished":
                        // do something with finished. For example, show this image
                        echo "<img src='$json_data->image_url'>";
                        // Or you can download the image from our server
                        $loop_flag = FALSE;
                        break;
                    case "processing":
                    default:
                        if ((time() - $start_time) > $timeout) {
                            $loop_flag = false;
                            $timeout_flag = true; // set the timeout flag. You can handle it later.
                        } else {
                            sleep(3); // This only work on windows.
                        }
                        break;
                }
            } catch (Exception $e) {
                // Do whatever you think is right to handle the exception.
                $loop_flag = FALSE;
                echo 'Caught exception: ', $e->getMessage(), "\n";
            }
        }

        if ($timeout_flag) {
            // handle the timeout event here
            echo "Error: Timeout after $timeout seconds.";
        }
    }
    // curl to connect server
    function connect($url, $para)
    {
        if (empty($para)) {
            return false;
        }
        $ch = curl_init();
        curl_setopt($ch, CURLOPT_URL, $url);
        curl_setopt($ch, CURLOPT_HEADER, 0);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
        curl_setopt($ch, CURLOPT_POST, 1);
        curl_setopt($ch, CURLOPT_POSTFIELDS, http_build_query($para));
        curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 30);
        curl_setopt($ch, CURLOPT_TIMEOUT, 30);
        $data = curl_exec($ch);
        curl_close($ch);
        return $data;
    }

    function call_p2i_with_callback()
    {
        global $apikey, $api_url;
        // URL can be those formats: http://www.google.com https://google.com google.com and www.google.com
        $url = "http://www.google.com";
        // 0 - iPhone4, 1 - iPhone5, 2 - Android, 3 - WinPhone, 4 - iPad, 5 - Android Pad, 6 - Desktop
        $device = 0;

        // you can pass us any parameters you like. We will pass it back.
        // Please make sure http://your_server_domain/api_callback can handle our call
        $callback_url = "http://your_server_domain/api_callback?image_id=your_unique_image_id_here";
        $para = array(
                    "p2i_url" => $url,
                    "p2i_key" => $apikey,
                    "p2i_device" => $device
                );
        $response = connect($api_url, $para);

        if (empty($response)) {
            // Do whatever you think is right to handle the exception.
        } else {
            $json_data = json_decode($response);
            if (empty($json_data->status)) {
                // api error do something
                echo "api error";
            }else
            {
                //do anything
                echo $json_data->status;
            }
        }

    }

    // This function demo how to handle the callback request
    function api_callback()
    {
        if (! empty($_REQUEST["image_id"])) {
            // do anything you want about the unique image id. We suggest to use it to identify which url you send to us since you can send 1,000 at one time.
        }

        if (! empty($_POST["result"])) {
            $post_data = $_POST["result"];
            $json_data = json_decode($post_data);
            switch ($json_data->status) {
                case "error":
                    // do something with error
                    echo $json_data->errno . " " . $json_data->msg;
                    break;
                case "finished":
                    // do something with finished
                    echo $json_data->image_url;
                    // Or you can download the image from our server
                    break;
                default:
                    break;
            }
        } else {
            // Do whatever you think is right to handle the exception.
            echo "Error: Empty";
        }
    }