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(PHP Extension) Async SFTP Progress Info

Demonstrates checking for progress info updates when running a task asynchronously. This example demonstrates an SFTP download.

Chilkat PHP Downloads

PHP Extension for Windows, Linux, MacOS,
Alpine Linux, Solaris

<?php

// The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number.
// For example, if using Chilkat v9.5.0.48, then include as shown here:
include("chilkat_9_5_0.php");

// All Chilkat classes can be unlocked at once at the beginning of a program
// by calling UnlockBundle.  It requires a Bundle unlock code.
$chilkatGlob = new CkGlobal();
$success = $chilkatGlob->UnlockBundle('Anything for 30-day trial.');
if ($success != true) {
    print $chilkatGlob->lastErrorText() . "\n";
    exit;
}

$sftp = new CkSFtp();

// Set some timeouts, in milliseconds:
$sftp->put_ConnectTimeoutMs(15000);
$sftp->put_IdleTimeoutMs(15000);

// Connect to the SSH server.  
// The standard SSH port = 22
// The hostname may be a hostname or IP address.
$hostname = 'www.my-ssh-server.com';
$port = 22;
$success = $sftp->Connect($hostname,$port);
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

// Authenticate with the SSH server.  Chilkat SFTP supports
// both password-based authenication as well as public-key
// authentication.  This example uses password authenication.
$success = $sftp->AuthenticatePw('myLogin','myPassword');
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

// After authenticating, the SFTP subsystem must be initialized:
$success = $sftp->InitializeSftp();
if ($success != true) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

// --------------------
// Download a file
// --------------------
$localFilePath = 'c:/temp/hamlet.xml';
$remoteFilePath = 'subdir1/subdir2/hamlet.xml';

// Call the async version of the DownloadFileByName method to return a task object.
// The task object is loaded, but is in the Inert state -- meaning it is
// not yet scheduled to run on Chilkat's background thread pool.
// task is a CkTask
$task = $sftp->DownloadFileByNameAsync($remoteFilePath,$localFilePath);
if ($sftp->get_LastMethodSuccess() == false) {
    print $sftp->lastErrorText() . "\n";
    exit;
}

// Before starting the task, tell it to keep an in-memory log of what would've been
// ProgressInfo callbacks.
$task->put_KeepProgressLog(true);

// Schedule the task for running on the thread pool.  This changes the task's state
// from Inert to Live.
$success = $task->Run();
if ($success != true) {
    print $task->lastErrorText() . "\n";

    exit;
}

// The application is now free to do anything else
// while the file is being downloaded.

// For this example, we'll simply sleep and periodically
// check to see if the download is finished, and report the progress
// along the way.
$curPctDone = 0;

while ($task->get_Finished() != true) {

    if ($task->get_PercentDone() != $curPctDone) {
        $curPctDone = $task->get_PercentDone();
        print $curPctDone . ' percent done' . "\n";
    }

    // Check the progress info log.
    // Emit any log entries..
    while (($task->get_ProgressLogSize() > 0)) {
        // Get the 1st entry, emit it, and then remove it..
        $name = $task->progressInfoName(0);
        $value = $task->progressInfoValue(0);

        // Entries reporting the received byte count will have the name "RcvByteCount"
        // Entries reporting the current bytes-per-second will have the name "RcvBytesPerSec"

        print $name . ': ' . $value . "\n";
        $task->RemoveProgressInfo(0);
    }

    // Sleep 100 ms.
    $task->SleepMs(100);

}

// Just in case there are any remaining entries...
while (($task->get_ProgressLogSize() > 0)) {
    // Get the 1st entry, emit it, and then remove it..
    $name = $task->progressInfoName(0);
    $value = $task->progressInfoValue(0);
    print $name . ': ' . $value . "\n";
    $task->RemoveProgressInfo(0);
}

// A finished task could be one that was canceled, aborted, or truly finished.  

// If the task was "canceled", it was canceled prior to actually starting.  This could
// happen if the task was canceled while waiting in a thread pool queue to be scheduled by Chilkat's
// background thread pool scheduler.  

// If the task was "aborted", it indicates that it was canceled while running in a background thread.  
// The ResultErrorText will likely indicate that the task was aborted.

// If the task "completed", then it ran to completion, but the actual success/failure of the method
// is determined by the result obtained via a GetResult* method.  (A "completed" task will
// have a StatusInt equal to 7.   If the task finished, but was not completed, then it must've
// been aborted or canceled:
if ($task->get_StatusInt() != 7) {
    print 'Task did not complete.' . "\n";
    print 'task status: ' . $task->status() . "\n";

    exit;
}

// The DownloadFileByName method returns a boolean.  Therefore, after the task is finished,
// we can get the boolean result by calling GetResultBool.  This is the return value had
// we called DownloadFileByName synchronously.
$success = $task->GetResultBool();
if ($success != true) {
    // The task's ResultErrorText contains what would have been in the LastErrorText property had
    // the DownloadFileByName method been called synchronously.
    print $task->resultErrorText() . "\n";
}
else {
    print 'File downloaded asynchronously.' . "\n";
}


?>

 

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