private/GoogleAccessToken.ps1
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function Get-GoogleAccessToken { param( [Parameter(Mandatory=$true)] [string]$code, [Parameter(Mandatory=$true)] [string]$clientId, [Parameter(Mandatory=$true)] [string]$clientSecret, [Parameter()] [string]$redirectUri = "http://localhost/oauth2callback" ) # url-encode code $code = [System.Web.HttpUtility]::UrlEncode($code) # construct form-body $body = "code=$code&client_id=$clientId&client_secret=$clientSecret&redirect_uri=$redirectUri&grant_type=authorization_code" try { Write-Verbose "Get-GoogleAccessToken: Fetching Access Token with short-lived expiry..." $requestUri = "https://www.googleapis.com/oauth2/v4/token" $tokens = Invoke-RestMethod -Uri $requestUri -Method POST -Body $body -ContentType "application/x-www-form-urlencoded" -Verbose:$false $tokens } catch { Write-Error $_.ToString() } } function Update-GoogleAccessToken { param( [Parameter()] [string]$clientId, [Parameter()] [string]$clientSecret, [Parameter()] [string]$refreshToken ) $body = "client_id=$clientId&client_secret=$clientSecret&refresh_token=$refreshToken&grant_type=refresh_token" $requestUri = "https://www.googleapis.com/oauth2/v4/token" Write-Verbose "Update-GoogleAccessToken: Upgrading token using refresh-token..." $tokens = Invoke-RestMethod -Uri $requestUri -Method POST -Body $body -ContentType "application/x-www-form-urlencoded" Write-Verbose "Update-GoogleAccessToken: Received token: $tokens" $tokens } function Test-GoogleAccessToken { param( [string]$accessToken ) try { Write-Verbose "Test-GoogleAccessToken: Validating access-token" $uri = "https://www.googleapis.com/oauth2/v1/tokeninfo?access_token=$accessToken" Invoke-RestMethod -Uri $uri -Verbose:$false Write-Verbose "Test-GoogleAccessToken: Valid" $true } catch { Write-Verbose "Test-GoogleAccessToken: Access token is not valid" $false } } |