conference_downloads.ps1

Param
(
    [Parameter(Mandatory=$true)]
    [String]
    $DownloadLocation
)
	
cls

# The script has been tested on Powershell 3.0
Set-StrictMode -Version 3

# Following modifies the Write-Verbose behavior to turn the messages on globally for this session
$VerbosePreference = "Continue"

#$ErrorActionPreference = 'Stop'

if ($DownloadLocation -eq $null -or $DownloadLocation.Length -eq 0)
{
	$DownloadLocation = (Get-Location -PSProvider FileSystem).ProviderPath 
}

$rss = (new-object net.webclient)
 
 
function DownloadFile
{
	param ([string] $source, [string] $destination)
	
	Write-Output "Downloading '$source' to '$destination'"
	
	try
	{
		if (!(Test-Path -Path $destination -PathType Leaf))
		{
			$wc = (New-Object System.Net.WebClient)
     		$wc.DownloadFile($source, $destination)
		}
	}
	catch
	{
		$ex = $_.Exception.InnerException
		Write-Error "Failed to download file '$source'. $ex.Message"
	}
}
       	

#Set the username for windows auth proxy
#$rss.proxy.credentials=[system.net.credentialcache]::defaultnetworkcredentials

# Set the RSS feed path
# TechEd NA 2013
#$dataFeed = "http://channel9.msdn.com/Events/TechEd/NorthAmerica/2013/rss/mp4high/?sort=sequential&direction=desc&term=&r=Developer+Tools+%26+Application+Lifecycle+Management&r=Windows+Azure+Application+Development&y=Breakout&Media=true#fbid=FDnmapgI5Hf"
#
# TechEd NA 2013 - All
#$dataFeed = "http://channel9.msdn.com/Events/TechEd/NorthAmerica/2013/RSS/mp4high"
#
#TechEd NA 2013 - Windows Azure
#$dataFeed = "http://channel9.msdn.com/Events/TechEd/NorthAmerica/2013/rss/mp4high/?sort=sequential&direction=desc&term=&r=Windows+Azure+Application+Development&y=Breakout&Media=true#fbid=FDnmapgI5Hf"
#
# TechEd Europe 2013 - All
#$dataFeed = "http://channel9.msdn.com/Events/TechEd/Europe/2013/RSS/mp4high"
#
# TechEd Europe 2013 - Windows Azure
#$dataFeed = "http://channel9.msdn.com/Events/TechEd/europe/2013/RSS/mp4high/?sort=sequential&direction=desc&term=&r=Windows+Azure+Application+Development&y=Breakout&Media"
#
#BUILD 2013 - All
#$dataFeed = "http://channel9.msdn.com/Events/Build/2013/RSS/mp4high#theSessions"
#
#BUILD 2014 - Azure
$dataFeed = "http://s.ch9.ms/Events/Build/2014/rss/mp4med?sort=sequential&direction=desc&term=&tag=azure"
 
$a = ([xml]$rss.downloadstring($dataFeed)) 
$a.rss.channel.item | foreach{
	$mediaUrl = New-Object System.Uri($_.enclosure.url)
  	$pptxUrl = New-Object System.Uri($_.enclosure.url.Replace(".mp4", ".pptx"))
   	$file = $_.creator + " - " + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-").Replace("<", "-") + ".mp4"
   	$pptx = $_.creator + " - " + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-").Replace("<", "-") + ".pptx"
	
	if ($_.category -eq "azure")
	{
		$downloadFile = $DownloadLocation + "\" + $file
		DownloadFile -source $mediaUrl -destination $downloadFile

		$downloadFile = $DownloadLocation + "\" + $pptx
		DownloadFile -source $pptxUrl -destination $downloadFile
		
		# try alternate location for PPTX - only tested with BUILD 2014
		$sessionNumber = $_.link.Substring($_.link.LastIndexOf("/") + 1)
		$pptxUrlAlt = "http://video.ch9.ms/sessions/build/2014/" + $sessionNumber + ".pptx"
		$downloadFile = $DownloadLocation + "\" + $pptx
		DownloadFile -source $pptxUrlAlt -destination $downloadFile
	}
}