Powershell Expand-archive problem.

It's due to the compression type not being recognised.

Try this - it should extract most types of compressed files

Code:

function Extract-Cab ($CabFilePath, $Destination){
    $Shell = New-Object -Comobject "Shell.Application"
    $SourceCab = $Shell.Namespace($CabFilePath).items()
    $DestinationFolder = $Shell.Namespace($Destination)
    $DestinationFolder.CopyHere($SourceCab)
}

Extract-Cab -CabFilePath .\PR.zip -Destination .\

Just realised - it won't resolve relative paths - you will need to call Convert-Path

Here's another example that works with short paths

Code:

Param($CabFilePath, $Destination)

$Shell = New-Object -Comobject "Shell.Application"
$SourceCab = $Shell.Namespace((Convert-Path $CabFilePath)).items()
$DestinationFolder = $Shell.Namespace((Convert-Path $Destination))
$DestinationFolder.CopyHere($SourceCab)

Eg:
.\ExtractCab.ps1 -CabFilePath .\PR.zip -Destination .\

lvgandhi said:

I get msg as
D:\Data\Lvg\backup\bin\ExtractCab.ps1 is not digitally signed. What to do?

Run this in PS as Admin:

Set-ExecutionPolicy -ExecutionPolicy RemoteSigned -Scope CurrentUser

See if the file is blocked - right clicking the .PS1 file, Properties and choosing Unblock.

Or try other execution policies eg -ExecutionPolicy Bypass

You can send me your script and I'll add the function to it.

The file I uploaded is just to test.

Superfly said:

See if the file is blocked - right clicking the .PS1 file, Properties and choosing Unblock.

Or try other execution policies eg -ExecutionPolicy Bypass

You can send me your script and I'll add the function to it.

The file I uploaded is just to test.

Thanks. Now Expand-Archive is working. Still a puzzle why it was not working yesterday , but working at 12 noon IST. After 5 hrs, it did not work. Now again it works. .

- - - Updated - - -

Now I have found problem is with downloaded file, not with expand-archive.
When I download a file using firefox browser its size is as follows
PS D:\Data\Downloads> dir PR0*


Directory: D:\Data\Downloads


Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 08/01/2020 19:41 312568 PR080120.zip

I used this code below to download file.
$url = "https://www.nseindia.com/archives/equities/bhavcopy/pr/$PR"
$output = "PR.zip"
Invoke-WebRequest -Uri $url -OutFile $output

file size as below.
PS D:\Data\Lvg> dir PR*


Directory: D:\Data\Lvg


Mode LastWriteTime Length Name
---- ------------- ------ ----
-a---- 08/01/2020 20:08 180410 PR.zip

7zip is able to unzip direct download. when try to unzip file downloaded by PS script I get comment it is not archive file.
This happens only for last 3 days. Previously there was no problem.
How to download file with PS to get file same as direct download.