Extracting attachments from SharePoint online using PowerShell - powershell

Question

Currently I am trying to extract attachments from a list on SharePoint online. I found a code online that is supposed to do this but i get an error. The code that I found is a follows:
$webUrl = "https://mm.sharepoint.com/teams/pj-b0000"
$library = "Photos"
#Local Folder to dump files
$tempLocation = "C:\Users\C\Documents\temp"
$s = new-object Microsoft.SharePoint.SPSite($webUrl)
$w = $s.OpenWeb()
$l = $w.Lists[$library]
foreach ($listItem in $l.Items)
{
Write-Host " Content: " $listItem.ID
$destinationfolder = $tempLocation + "\" + $listItem.ID
if (!(Test-Path -path $destinationfolder))
{
$dest = New-Item $destinationfolder -type directory
}
foreach ($attachment in $listItem.Attachments)
{
$file = $w.GetFile($listItem.Attachments.UrlPrefix + $attachment)
$bytes = $file.OpenBinary()
$path = $destinationfolder + "\" + $attachment
Write "Saving $path"
$fs = new-object System.IO.FileStream($path, "OpenOrCreate")
$fs.Write($bytes, 0 , $bytes.Length)
$fs.Close()
}
}
but i get this error:
new-object : Cannot find type [Microsoft.SharePoint.SPSite]: verify that the assembly containing this type is loaded.
At C:\Users\C\Documents\SPListExtract.ps1:5 char:6
+ $s = new-object Microsoft.SharePoint.SPSite($webUrl)
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidType: (:) [New-Object], PSArgumentException
+ FullyQualifiedErrorId : TypeNotFound,Microsoft.PowerShell.Commands.NewObjectCommand
You cannot call a method on a null-valued expression.
At C:\Users\C\Documents\SPListExtract.ps1:6 char:1
+ $w = $s.OpenWeb()
+ ~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : InvokeMethodOnNull
Cannot index into a null array.
At C:\Users\C\Documents\SPListExtract.ps1:7 char:1
+ $l = $w.Lists[$library]
+ ~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo : InvalidOperation: (:) [], RuntimeException
+ FullyQualifiedErrorId : NullArray
so i edited that code a bit but i only get the item in the list and not the attachments that are in the items. The code that i wrote is as follows:
Connect-PnPOnline -Url 'https://mm.sharepoint.com/teams/pj-b0000' -UseWebLogin
$tempLocation = "C:\Users\C\Documents\temp"
$list = Get-PnPListItem -List 'Photos'
foreach ($listItem in $list)
{
Write-Host " Content: " $listItem.ID
$destinationfolder = $tempLocation + "\" + $listItem.ID
if (!(Test-Path -path $destinationfolder))
{
$dest = New-Item $destinationfolder -type directory
}
foreach ($attachment in $listItem.Attachments)
{
$file = $w.GetFile($listItem.Attachments.UrlPrefix + $attachment)
$bytes = $file.OpenBinary()
$path = $destinationfolder + "\" + $attachment
Write "Saving $path"
$fs = new-object System.IO.FileStream($path, "OpenOrCreate")
$fs.Write($bytes, 0 , $bytes.Length)
$fs.Close()
}
}
I see my problem is the inside foreach loop for the $file variable I think. Would someone be able to help me with this?
Much thanks in advance.

Answer 1

The first line in your errors implies you do not have the assembly loaded:
new-object : Cannot find type [Microsoft.SharePoint.SPSite]: verify that the assembly containing this type is loaded.
These assemblies are only installed on a SharePoint server:
https://social.technet.microsoft.com/Forums/en-US/4a78ed2c-efde-40fa-800c-c4ecfa68a7c4/cannot-find-type-microsoftsharepointspsite-when-running-sharepoint-powerscript-in-a-windows-10?forum=sharepointdevelopment