How can I write a binary Stream object to a file in PowerShell?

Question

I think I've tried every wrong way, and those few that don't just give ugly error messages write a garbled file that cannot be opened (you can still see the JFIF in it, but the jpeg magic smoke has been lost).

The Stream itself is $contactInfo.Get_Item("Photo"). I think I need to do something like this:

$br = new-object System.IO.BinaryReader $contactInfo.Get_Item("Photo")

But past that, I don't know what to do. I've tried Googling, but I'm not even sure what I'm looking for to be quite honest.

The type of the Stream object is Microsoft.Lync.Model.UCStream.

What is the type that Get_Item() returns? Execute $contactInfo.Get_Item("Photo").GetType().Fullname. If it is a byte[] then just do this Set-Content photo.jpeg $contactInfo.Get_Item("Photo") -Encoding Byte. — Keith Hill
– Keith Hill, Commented Mar 8, 2013 at 17:20
Use the Read() method to read until end of stream (-1). Take each int except the last and put it in a PowerShell byte[]. Then use $bytes | Set-Content photo.jpeg -enc byte. — Keith Hill
– Keith Hill, Commented Mar 8, 2013 at 19:59
@KeithHill Would you mind writing it as an answer with a short snippet? — John O
– John O, Commented Mar 8, 2013 at 20:04

Keith Hill · Accepted Answer · 2013-03-08 21:14:06Z

3

I don't have access to this particular type (UCStream) but in general you would write this in PowerShell like so:

$br = new-object io.binaryreader $contactInfo.Get_Item("Photo")
$al = new-object collections.generic.list[byte]
while (($i = $br.Read()) != -1)
{
    $al.Add($i)
}

Set-Content photo.jpeg $al.ToArray() -enc byte

answered Mar 8, 2013 at 21:14

Keith Hill

204k44 gold badges370 silver badges377 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

How can I write a binary Stream object to a file in PowerShell?

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related