Permalink
Switch branches/tags
Nothing to show
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
117 lines (104 sloc) 4.19 KB
############################################################### 
# Eric Ligmans Amazing Free Microsoft eBook Giveaway 
# https://blogs.msdn.microsoft.com/mssmallbiz/2017/07/11/largest-free-microsoft-ebook-giveaway-im-giving-away-millions-of-free-microsoft-ebooks-again-including-windows-10-office-365-office-2016-power-bi-azure-windows-8-1-office-2013-sharepo/
# Link to download list of eBooks 
# http://ligman.me/2sZVmcG 
# Thanks David Crosby for the template (https://social.technet.microsoft.com/profile/david%20crosby/)
#
# Modified by Robert Cain (http://arcanecode.me)
# Added code to check to see if a book was already downloaded,
# and if so was it the correct file size. If so, the book
# download is skipped. This allows users to simply rerun the
# script if their download process is interrupted.
############################################################### 
# Set the folder where you want to save the books to
$dest = "C:\Book\" # Make sure the file path ends in a \
 
# Download the source list of books 
$downLoadList = "http://ligman.me/2sZVmcG" 
$bookList = Invoke-WebRequest $downLoadList 
 
# Convert the list to an array 
[string[]]$books = "" 
$books = $bookList.Content.Split("`n"
# Remove the first line - it's not a book 
$books = $books[1..($books.Length -1)] 
$books # Here's the list 
# Get the total number of books we need to download
$bookCount = $($books).Count
# Set a simple counter to let the user know what book
# number we're currently downloading
$currentBook = 0 
# As an option, we can have it log progress to a file
$log = $true
if ($log -eq $true)
{
# Construct a log file name based on the date that
# we can save progress to
$dlStart = Get-Date
$dlStartDate = "$($dlStart.Year)-$($dlStart.Month)-$($dlStart.Day)"
$dlStartTime = "$($dlStart.Hour)-$($dlStart.Minute)-$($dlStart.Second)"
$logFile = "$($dest)BookDlLog-$dlStartDate-$dlStartTime.txt"
}
# Download the books 
foreach ($book in $books
# Increment current book number
$currentBook++
try
{
# Grab the header with the books full info
   $hdr = Invoke-WebRequest $book -Method Head 
# Get the title of the book from the header then
# make it a safe string (remove special characters)
   $title = $hdr.BaseResponse.ResponseUri.Segments[-1
   $title = [uri]::UnescapeDataString($title
# Construct the path to save the file to
   $saveTo = $dest + $title 
# If the file doesn't exist, download it
if ($(Test-Path $saveTo) -eq $false)
{
$msg = "Downloading book $currentBook of $bookCount - $title"
$msg
if ($log -eq $true) { "`n$($msg)" | Add-Content $logFile }
   Invoke-WebRequest $book -OutFile $saveTo 
}
else
{
# If it does exist, we need to make sure it wasn't
# a partial download. If the file size on the server
# and the file size on local disk don't match,
# redownload it
# Get the size of the file from the download site
$dlSize = $hdr.BaseResponse.ContentLength
# Get the size of the file on disk
$fileSize = $(Get-ChildItem $saveTo).Length
if ($dlSize -ne $fileSize)
{
# If not equal we need to download the book again
$msg = "Redownloading book $currentBook of $bookCount - $title"
$msg
if ($log -eq $true) { "`n$($msg)" | Add-Content $logFile }
   Invoke-WebRequest $book -OutFile $saveTo 
}
else
{
# Otherwise we have a good copy of the book, just
# let the user know we're skipping it.
$msg = "Book $currentBook of $bookCount ($title) already exists, skipping it"
$msg
if ($log -eq $true) { "`n$($msg)" | Add-Content $logFile }
}
}
} # end try
catch
{
$msg = "There was an error downloading $title. You may wish to try to download this book manually."
Write-Host $msg -ForegroundColor Red
if ($log -eq $true) { "`n$($msg)" | Add-Content $logFile }
} # end catch
} # end foreach 
# Let user know we're done, and give a happy little beep
# in case they aren't looking at the screen.
"Done downloading all books"
[Console]::Beep(500,300)