(PowerShell) X.com OAuth 2.0 Refresh Access Token

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Note: This example requires Chilkat v10.1.2 or greater.

For more information, see https://docs.x.com/resources/fundamentals/authentication/oauth-2-0/authorization-code

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

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

$jsonToken = New-Object Chilkat.JsonObject
$success = $jsonToken.LoadFile("qa_data/tokens/x.json")
if ($success -ne $true) {
    $("Failed to load x.json")
    exit
}

# The access token JSON looks something like this:

# {
#   "token_type": "bearer",
#   "expires_in": 7200,
#   "access_token": "VmNDLVZiYUZwejY5Mkx3RblFTmo3ek1leTRGclMuZFVOUTVUTWpNbVZKb1N5OjE3NDAxNjk4MDVxNTE6MToxOaF0OjE",
#   "scope": "block.read follows.read offline.access tweet.write block.write like.write like.read users.read tweet.read follows.write",
#   "refresh_token": "eThOWVVFSTRqdVp3QTFndGsxM2ZGZmFyNWVrU0phM1JKbGdrbGNWRGJzb1loOjE3NDAwMjk4MDUxNTI6MTowOnJ0OjE"
# }

$oauth2 = New-Object Chilkat.OAuth2

$oauth2.TokenEndpoint = "https://api.x.com/2/oauth2/token"

# Replace this with your actual X.com OAuth2 Client ID and Client Secret
$oauth2.ClientId = "OAUTH2_CLIENT_ID"
$oauth2.ClientSecret = "OAUTH2_CLIENT_SECRET"

# Get the "refresh_token"
$oauth2.RefreshToken = $jsonToken.StringOf("refresh_token")

# Send the HTTP POST to refresh the access token..
$success = $oauth2.RefreshAccessToken()
if ($success -ne $true) {
    $($oauth2.LastErrorText)
    exit
}

# Load the access token response into the json object 
$jsonToken.Load($oauth2.AccessTokenResponse)

# If an "expires_on" member does not exist, then add the JSON member by
# getting the current system date/time and adding the "expires_in" seconds.
# This way we'll know when the token expires.
if ($jsonToken.HasMember("expires_on") -eq $false) {
    $dtExpire = New-Object Chilkat.CkDateTime
    $dtExpire.SetFromCurrentSystemTime()
    $dtExpire.AddSeconds($jsonToken.IntOf("expires_in"))
    $jsonToken.AppendString("expires_on",$dtExpire.GetAsUnixTimeStr($false))
}

# Save the new JSON access token response to a file.
# The access + refresh tokens contained in this JSON will be needed for the next refresh.
$sbJson = New-Object Chilkat.StringBuilder
$jsonToken.EmitCompact = $false
$jsonToken.EmitSb($sbJson)
$sbJson.WriteFile("qa_data/tokens/x.json","utf-8",$false)

$("OAuth2 authorization granted!")
$("New Access Token = " + $oauth2.AccessToken)