(PowerShell) Calendar: Refresh Expired OAuth2 Access Token

Refreshes an expired OAuth2 access token.

Note: This example requires Chilkat v11.0.0 or greater.

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Add-Type -Path "C:\chilkat\ChilkatDotNet47-x64\ChilkatDotNet47.dll"

$success = $false

# This example requires the Chilkat API to have been previously unlocked.
# See Global Unlock Sample for sample code.

$json = New-Object Chilkat.JsonObject
$success = $json.LoadFile("qa_data/tokens/msGraphCalendar.json")
if ($success -ne $true) {
    exit
}

$req = New-Object Chilkat.HttpRequest
$req.AddParam("grant_type","refresh_token")
$req.AddParam("redirect_uri","http://localhost:3017/")
$req.AddParam("client_id","MICROSOFT-GRAPH-CLIENT-ID")
$req.AddParam("client_secret","MICROSOFT-GRAPH-CLIENT-SECRET")
$req.AddParam("refresh_token",$json.StringOf("refresh_token"))
$req.AddParam("scope","openid profile offline_access user.readwrite calendars.readwrite files.readwrite")

$http = New-Object Chilkat.Http

$req.HttpVerb = "POST"
$req.ContentType = "application/x-www-form-urlencoded"

$resp = New-Object Chilkat.HttpResponse
$success = $http.HttpReq("https://login.microsoftonline.com/common/oauth2/v2.0/token",$req,$resp)
if ($success -eq $false) {
    $($http.LastErrorText)
    exit
}

# Load the JSON response.
$json.Load($resp.BodyStr)
$json.EmitCompact = $false

# Show the JSON response.
$($json.Emit())

$("Response status code: " + $resp.StatusCode)

# If the response status code is not 200, then it's an error.
if ($resp.StatusCode -ne 200) {
    exit
}

# Save the refreshed access token JSON to a file for future requests.
$fac = New-Object Chilkat.FileAccess
$fac.WriteEntireTextFile("qa_data/tokens/msGraphCalendar.json",$json.Emit(),"utf-8",$false)

$("Success.")