Google Drive Upload Excerpt

GDriveUploadExcerpt.ps1

<#
This is a fairly simple one-time upload with no options, etc. Consider using this as a base to create a New-GDriveItem type function
Modified code, in response to: https://monteledwards.com/2017/03/05/powershell-oauth-downloadinguploading-to-google-drive-via-drive-api/
You should follow the above link to set $accessToken to your access token and understand what is happening here
#>

# Change this to the file you want to upload
$SourceFile = 'C:\Path\To\File'

# Get the source file contents and details, encode in base64
$sourceItem = Get-Item $sourceFile
$sourceBase64 = [Convert]::ToBase64String([IO.File]::ReadAllBytes($sourceItem.FullName))
$sourceMime = [System.Web.MimeMapping]::GetMimeMapping($sourceItem.FullName)

# Set the file metadata
$uploadMetadata = @{
    originalFilename = $sourceItem.Name
    name = $sourceItem.Name
    description = $sourceItem.VersionInfo.FileDescription
}

# Set the upload body
$uploadBody = @"
--boundary
Content-Type: application/json; charset=UTF-8

$($uploadMetadata | ConvertTo-Json) 

--boundary
Content-Transfer-Encoding: base64
Content-Type: $sourceMime

$sourceBase64
--boundary--
"@

# Set the upload headers
$uploadHeaders = @{
    "Authorization" = "Bearer $accessToken"
    "Content-Type" = 'multipart/related; boundary=boundary'
    "Content-Length" = $uploadBody.Length
}

# Perform the upload
$uploadUri = 'https://www.googleapis.com/upload/drive/v3'
$response = Invoke-RestMethod -Uri "$uploadUri/files?uploadType=multipart" -Method Post -Headers $uploadHeaders -Body $uploadBody