Ignite Downloader

IgniteDownloader.ps1

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## Author:      David das Neves
## Date:        15.12.2019
## Description: Filtering of Ignite session files with OutGridView
##              Downloading with 10 downloads in parallel including resume functionality
#########################################################################################

#   Start PowerShell as admin 
#   via code:   Start-Process powershell -Verb runAs

#   have a look at VSCode to switch between pwsh versions on the very bottom right
#   Click on 5.0 and pick PowerShell version 7 Preview

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## Needs only to be run once
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#region prep

#Path to download all the Ignite videos
$downloadPath = "D:\Ignite\" #you can modify that

#Creating Path
if (!(Test-Path $downloadPath)) {
    New-Item $downloadPath -ItemType Directory
}

#Installing PowerShell 7 - add to path!
Invoke-Expression "& { $(Invoke-RestMethod https://aka.ms/install-powershell.ps1) } -UseMSI -Preview" 

#endregion

#############################################################################################################
## If you want to create a new download job - execute the code starting from here with PowerShell version 7
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#region LoadingAllSessions

#Load all sessions - only from online because some download URIs are still being added
#Retrieving all Ignite sessions
$allSessions = (Invoke-RestMethod 'https://api-myignite.techcommunity.microsoft.com/api/session/all') | Where-Object { $_.downloadVideoLink } | Select-Object sessionCode, title, topic, speakerNames, level, description, downloadVideoLink

#endregion

#Picking sessions with a GridView and serializing the sessions to be downloaded to file for resume.
#region creatingADownloadJob

#Picking sessions for download
$sessionsToDownload = $allSessions | Out-GridView -PassThru
<#IMPORTANT: You can also work 
    - with CTRL+A for selecting all
    - with CTRL+MouseClick for selecting several sessions
    - with Shift+Mouseclick for selecting several sessions in a row  
#>

#Serializing the sessions for download to possibly continue after interruption
$sessionsToDownload | Export-Clixml (Join-Path -Path $downloadPath -Childpath "sessionsToDownload.clixml")

#endregion

################################################################################################################
## If you want to start or continue a download job - execute the code starting from here in PowerShell version 7 
################################################################################################################

#region StartOrResumeADownloadJob

#Path to download all the Ignite videos
if (-not $downloadPath ) {
    $downloadPath = "D:\Ignite\" #you can modify that
}

#Deserializing sessions for download
$sessionsToDownload = Import-Clixml (Join-Path -Path $downloadPath -Childpath "sessionsToDownload.clixml")

#Total number of sessions in the download job
$numberOfSessionsToDownload = $($sessionsToDownload.title.Count)

Write-Host "You are about to download $numberOfSessionsToDownload sessions in total."
$ErrorActionPreference = 'SilentlyContinue' #already downloaded objects would create an error

#Cleaning titles and extending the PSCustomObject with a downloadPath
$sessionsToDownloadCleanedAndExtended = $sessionsToDownload | Select-Object *, @{ Name = 'downloadPath'; Expression = { Join-Path -Path $downloadPath -ChildPath ($_.sessionCode + "_" + $($_.title).Substring(0, [Math]::Min(50, $($_.title).length) ) + ".mp4").Replace('?', '').Replace(':', '').Replace('|', '-') } } 

#Download all sessions including sessionCode and title (max length 50) with 10 downloads in parallel
#The downloding files are printed out
$sessionsToDownloadCleanedAndExtended | Foreach-Object -Parallel { Write-Host $_.downloadPath; Invoke-WebRequest $($_.downloadVideoLink) -Resume -OutFile $_.downloadPath } -ThrottleLimit 10 

#endregion

Updated due to unaccepted chars in titles for file names.

Could please integrate a "file exists" before a download?
Thanks for the script it works nice

Regards Lhcat

Could please integrate a "file exists" before a download?
Thanks for the script it works nice

Regards Lhcat

Yeah - that would be easily possible, but it would then not resume the unfinished ones.

Thanks

Now working with PowerShell Version 7 solely - no switching needed.