mirror of
https://github.com/valitydev/salt.git
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76 lines
3.2 KiB
PowerShell
76 lines
3.2 KiB
PowerShell
Function DownloadFileWithProgress {
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# Code for this function borrowed from http://poshcode.org/2461
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# Thanks Crazy Dave
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# This function downloads the passed file and shows a progress bar
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# It receives two parameters:
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# $url - the file source
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# $localfile - the file destination on the local machine
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# Originally, DownLoadDir is deleted for each install, therefore
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# this function did not expect that the file exists.
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# You may want to set an environment variable SALTREPO_LOCAL_CACHE, a cache which lives as long as you decide.
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# Therefore this function must test if the file exists.
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param(
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[Parameter(Mandatory=$true)]
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[String] $url,
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[Parameter(Mandatory=$false)]
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[String] $localFile = (Join-Path $pwd.Path $url.SubString($url.LastIndexOf('/')))
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)
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begin {
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$Global:NEED_PROCESS_AND_END = $true
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Write-Verbose " **** DownloadFileWithProgress looking for **** $localFile ********"
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if ( [bool]$Env:SALTREPO_LOCAL_CACHE -and (Test-Path $localFile) ) {
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Write-Verbose " **** found **** $localFile ********"
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$Global:NEED_PROCESS_AND_END = $false
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} else {
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Write-Verbose " ++++++ BEGIN DOWNLOADING ++++++ $localFile +++++++"
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$client = New-Object System.Net.WebClient
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$Global:downloadComplete = $false
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$eventDataComplete = Register-ObjectEvent $client DownloadFileCompleted `
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-SourceIdentifier WebClient.DownloadFileComplete `
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-Action {$Global:downloadComplete = $true}
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$eventDataProgress = Register-ObjectEvent $client DownloadProgressChanged `
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-SourceIdentifier WebClient.DownloadProgressChanged `
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-Action { $Global:DPCEventArgs = $EventArgs }
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}
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}
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process {
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if ( $Global:NEED_PROCESS_AND_END ) {
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Write-Verbose " ++++++ actually DOWNLOADING ++++++ $localFile +++++++"
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Write-Progress -Activity 'Downloading file' -Status $url
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$client.DownloadFileAsync($url, $localFile)
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while (!($Global:downloadComplete)) {
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$pc = $Global:DPCEventArgs.ProgressPercentage
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if ($pc -ne $null) {
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Write-Progress -Activity 'Downloading file' -Status $url -PercentComplete $pc
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}
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}
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Write-Progress -Activity 'Downloading file' -Status $url -Complete
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}
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}
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end {
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if ( $Global:NEED_PROCESS_AND_END ) {
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Unregister-Event -SourceIdentifier WebClient.DownloadProgressChanged
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Unregister-Event -SourceIdentifier WebClient.DownloadFileComplete
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$client.Dispose()
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$Global:downloadComplete = $null
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$Global:DPCEventArgs = $null
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Remove-Variable client
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Remove-Variable eventDataComplete
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Remove-Variable eventDataProgress
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[GC]::Collect()
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# Errorchecking
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If (!((Test-Path "$localfile") -and ((Get-Item "$localfile").length -gt 0kb))) {
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Write-Error "download-module.psm1 exits in error, download is missing or has zero-length: $localfile"
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exit 2
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}
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}
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}
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} |