Download all BUILD 2013 sessions and powerpoint slides

downloadBUILD2013.ps1

# Based on script from http://www.toddklindt.com/Scripts/downloadmp4-pptx.ps1.txt

[Environment]::CurrentDirectory=(Get-Location -PSProvider FileSystem).ProviderPath 
$rss = (new-object net.webclient)

# Grab the RSS feed for the MP4 downloads
$a = ([xml]$rss.downloadstring("http://channel9.msdn.com/Events/Build/2013/RSS/mp4high")) 

# Walk through each item in the feed 
$a.rss.channel.item | foreach{   
  $code = $_.comments.split("/") | select -last 1	   
	
	# Grab the URL for the MP4 file
	$url = New-Object System.Uri($_.enclosure.url)  
	
	# Create the PPTX URL from the MP4 URL
	$urlpptx = ($_.enclosure.url).replace(".mp4",".pptx")
	
	# Create the local file name for the MP4 download
	$file = $code + "-" + $_.creator + "-" + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-").Replace("<", "") + ".mp4"  
	
	# Create the local file name for the PPTX download
	$filepptx = $code + "-" + $_.creator + "-" + $_.title.Replace(":", "-").Replace("?", "").Replace("/", "-").Replace("<", "") + ".pptx"  
	
	# Make sure the PPTX file doesn't already exist
	if (!(test-path $filepptx))     
	{ 	
		# Echo out the file that's being downloaded
		$filepptx   
		$wc = (New-Object System.Net.WebClient)  
		
		# Download the PPTX file
		$wc.DownloadFile($urlpptx, $filepptx)
		}
	
	# Make sure the MP4 file doesn't already exist
	if (!(test-path $file))     
	{ 	
		# Echo out the  file that's being downloaded
		$file

		# Download the MP4 file
		$wc.DownloadFile($url, $file)

		}	
		
	}

@nzthiago The script doesn't work flawlessly. it seems, it blocks process if file doesn't exist. I tried skipping 404's with try catch block but subsequent downloads halt. Hard time to debug the problem as well.