Hololens appx/appxbundle publishing cmdlet

hololens.ps1

#
# Very preliminary Hololens appx/appxbundle publishing cmdlet to stand-in for 
# Windows 10 SDK's WinAppDeployCmd which doesn't seem to support HoloLens
#
# https://gist.github.com/riverar/4046c3f97582e63dca618ab7f99cd337
#

# Working:
#   - Basic uploading of appx/appxbundle over HTTP
#
# Missing:
#  - HTTPS support
#  - Saved credential access
#  - Error handling
#  - Pre-warming of basic auth
#  - Progress bar
#  - Package state
#  - Removal
#  - ...

function Publish-HololensAppx
{
    param(
        [Parameter(Mandatory=$true)] [string] $DeviceAddress,
        [Parameter(Mandatory=$true)] [string] $AppX,
        $Credential = (Get-Credential)
    )
    
    Write-Host "Uploading $AppX"

    Add-Type -AssemblyName System.Net.Http

    $AppXFileName = [System.IO.Path]::GetFileName($AppX);
    $PublishUri = "http://$DeviceAddress/api/app/packagemanager/package?package=$AppXFileName"

    $HttpClientHandler = New-Object System.Net.Http.HttpClientHandler
    $HttpClientHandler.Credentials = New-Object System.Net.NetworkCredential @($Credential.UserName, $Credential.Password)
    $HttpClient = New-Object -TypeName System.Net.Http.HttpClient $HttpClientHandler

    $AppxFileStream = New-Object -TypeName System.IO.FileStream @($AppX, [System.IO.FileMode]::Open)
    $AppxStreamContent = New-Object -TypeName System.Net.Http.StreamContent $AppxFileStream
    
    #
    # HACK: Device Portal doesn't seem to support quoted-string boundary values (against rfc2045)
    # so we have to build a boundary ourselves.
    # feedback-hub:?contextid=519&feedbackid=19a5af49-38f4-409a-b464-e66f80679545&form=1&src=2
    #

    $Content = New-Object -TypeName System.Net.Http.MultipartFormDataContent "__Boundary"
    $Content.Headers.Remove("Content-Type") | Out-Null
    $Content.Headers.Add("Content-Type", "multipart/form-data; boundary=__Boundary")
    
    #
    # HACK: Device Portal doesn't seem to support *non*-quoted-string values for the name/filename
    # disposition attributes (against rfc2183) so we have to hack quotes in
    # feedback-hub:?contextid=519&feedbackid=fc230a20-209f-4435-9717-56218674f9af&form=1&src=2
    #

    $Content.Add($AppxStreamContent, """$AppXFilename""", """$AppXFileName""")

    $HttpClient.Timeout = [Timespan]::FromMinutes(5)
    $HttpClient.PostAsync($PublishUri, $Content).Result

    Write-Host "Done."
}