Download the SharePoint Connect Amsterdam 2014 slide decks from SlideShare. See blogpost http://blog.victorvogelpoel.nl/2014/12/31/powershell-download-sharepoint-connect-2014-amstedam-slides-from-slideshare-net-using-slideshare-api

DownloadSPCA2014DecksFromSlideShare.ps1

$slideshareUser = 'nccomms'
$slidedeckTitleFilter = 'SPCA2014*'
 
# Folder to download the slides to
$downloadfolder = 'C:\TEMP\SharePointConnect2014'
 
# Personal SlideShare API keys;
# apply for a key here: http://www.slideshare.net/developers/applyforapi
$slideShareAPIKey = 'YOUR_API_KEY'  #PRIVATE
$slideShareSharedSecret = 'YOUR_SHARED_SECRET'
 
# Unix timestamp
$ts = [int][double]::Parse($(Get-Date -date (Get-Date).ToUniversalTime()-uformat %s))
 
# Create an SHA1 hash from the concatenation of the shared secret and the timestamp
$hash = ([System.Security.Cryptography.HashAlgorithm]::Create('SHA1').ComputeHash((New-Object System.Text.UTF8Encoding).GetBytes("$slideShareSharedSecret$ts")) | foreach { $_.ToString("x2") }) -join ''
 
$slideshareAPIGetSlideShowsForUserUri = "https://www.slideshare.net/api/2/get_slideshows_by_user?username_for=$slideshareUser&limit=9999&api_key=$slideShareAPIKey&hash=$hash&ts=$ts"
 
# Now query the SlideShare API for user NCCOMMS slides
Write-Host "Query SlideShare API: $slideshareAPIGetSlideShowsForUserUri"
$spa2014SlideData = Invoke-RestMethod -uri $slideshareAPIGetSlideShowsForUserUri
 
if ($spa2014SlideData.SlideShareServiceError)
{
    Write-Host "ERROR while calling SlideShare API:" -ForegroundColor RED
    $spa2014SlideData.SlideShareServiceError.Message | foreach { Write-Host $_.'#text'  -ForegroundColor RED }
}
else
{
    Write-Host "Downloading the slide decks..."
 
    # Parsing the query results
    foreach ($slidedeckEntry in ($spa2014SlideData.User.Slideshow | where { $_.Title -like $slidedeckTitleFilter }))
    {
        # Now process each slideshow entry
 
        # Get the SlideShare PDF download url (which points to Amazon S3)
        $sourceFile = $slidedeckEntry.DownloadUrl
 
        # Extract the filename
        $filename = (New-Object Uri($sourceFile)).Segments | select -last 1 # get filename part of the url
        $destFilePath = (Join-Path $downloadfolder $filename)
 
        Write-Host "From `"$SourceFile`"`nTo `"$destFilePath`""
 
        # And download the deck file to the specified download folder
        Invoke-WebRequest -Uri $sourceFile -OutFile $destFilePath
    }
 
    Write-Host "Completed downloading the slide decks."
}