Need help for ftp files status - powershell

Question

i have been looking for a way to know the status of my ftp files, there are few log files are being uploading on my ftp server after every 15mints, but few times it fails to upload i just want an alert when ever a file fails to upload.
following code has been tired
function update {
$ftprequest = [System.Net.FtpWebRequest]::Create("ftp://ftpsite.com/Script_Apps/install_firefox.exe")
$ftprequest.Method = [System.Net.WebRequestMethods+Ftp]::GetDateTimestamp
$response = $ftprequest.GetResponse().StatusDescription
$tokens = $response.Split(" ")
$code = $tokens[0]
$localfile = (Get-Item "$dir\Apps\install_firefox.exe").LastWriteTimeUtc
if ($tokens -gt $localfile) {
write-host "Updating Firefox Installer..."
$File = "$dir\Apps\install_firefox.exe"
$ftp = "ftp://ftpsite.com/Script_Apps/install_firefox.exe"
$webclient = New-Object System.Net.WebClient
$uri = New-Object System.Uri($ftp)
$webclient.DownloadFile($uri, $File)
"Updated Firefox" >> $global:logfile
mainmenu
}
else {
Write-Host "Local Copy is Newer."
sleep 3
mainmenu
}
}

Answer 1

I'm going to assume this line deals with downloading/uploading files for your FTP site.
$ftp = "ftp://ftpsite.com/Script_Apps/install_firefox.exe"
$webclient = New-Object System.Net.WebClient
$uri = New-Object System.Uri($ftp)
$webclient.DownloadFile($uri, $File)
If so, then we can lookout for errors and do something when one occurs with try{}catch{} blocks.
You can put any code inside a try block, and when it hits a terminating error it will capture the error as $Error[0] which we can reference in a catch block.
try{
$ftp = "ftp://ftpsite.com/Script_Apps/install_firefox.exe"
$webclient = New-Object System.Net.WebClient
$uri = New-Object System.Uri($ftp)
$webclient.DownloadFile($uri, $File)
}
catch{
#Write out an error to the screen
"failed to download file $($ftp). `n--Ran into error $($Error[0].Exception.Message)"
#Todo - send a notification
}
This will give a result like this, when it fails to download.
Failed to download file ftp://ftpsite.com/Script_Apps/install_firefox.exe.
---Ran into error Exception calling "DownloadFile" with "2" argument(s):
"Unable to connect to the remote server"
Then, you can determine the best way to send a notification to suit your needs. There's way's to send e-mail from PowerShell, or Tweets, or even using a Push message to the Pushbullet app on your phone!