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(PowerShell) Asynchronous FTP Upload

Demonstrates an asynchronous FTP upload.

Chilkat .NET Downloads

Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-x64\ChilkatDotNet47.dll"

# This example assumes the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$ftp = New-Object Chilkat.Ftp2

$ftp.Hostname = "ftp.myftpserver.com"
$ftp.Username = "mylogin"
$ftp.Password = "mypassword"

# Connect and login to the FTP server.
$success = $ftp.Connect()
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

# Change to the remote directory where the file will be uploaded.
$success = $ftp.ChangeRemoteDir("junk")
if ($success -ne $true) {
    $($ftp.LastErrorText)
    exit
}

$localFilepath = "qa_data/xml/hamlet.xml"
$remoteFilename = "hamlet.xml"

# Call the async version of the PutFile 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 = $ftp.PutFileAsync($localFilepath,$remoteFilename)
if ($ftp.LastMethodSuccess -eq $false) {
    $($ftp.LastErrorText)
    exit
}

# Before starting the task, tell it to keep an in-memory log of what would've been
# ProgressInfo callbacks.
$task.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 -ne $true) {
    $($task.LastErrorText)

    exit
}

# The application is now free to do anything else
# while the file is being uploaded.

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

while ($task.Finished -ne $true) {

    if ($task.PercentDone -ne $curPctDone) {
        $curPctDone = $task.PercentDone
        $([string]$curPctDone + " percent done")
    }

    # Check the progress info log.
    # Emit any log entries..
    while (($task.ProgressLogSize -gt 0)) {
        # Get the 1st entry, emit it, and then remove it..
        $name = $task.ProgressInfoName(0)
        $value = $task.ProgressInfoValue(0)

        # Entries reporting the sent byte count will have the name "SendByteCount"
        # Entries reporting the current bytes-per-second will have the name "SendBytesPerSec"

        $($name + ": " + $value)
        $task.RemoveProgressInfo(0)
    }

    # Sleep 100 ms.
    $task.SleepMs(100)

}

# Just in case there are any remaining entries...
while (($task.ProgressLogSize -gt 0)) {
    # Get the 1st entry, emit it, and then remove it..
    $name = $task.ProgressInfoName(0)
    $value = $task.ProgressInfoValue(0)
    $($name + ": " + $value)
    $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.StatusInt -ne 7) {
    $("Task did not complete.")
    $("task status: " + $task.Status)

    exit
}

# The PutFile 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 PutFile synchronously.
$success = $task.GetResultBool()
if ($success -ne $true) {
    # The task's ResultErrorText contains what would have been in the LastErrorText property had
    # the GetFile method been called synchronously.
    $($task.ResultErrorText)
}
else {
    $("File uploaded asynchronously.")
}

$success = $ftp.Disconnect()

 

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