(PowerShell) Salesforce OAuth2 Refresh Access Token

See more OAuth2 Examples

Note: Use Chilkat v10.1.2 or later for this example.

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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.

# It is assumed we previously obtained an OAuth2 access token.
# This example loads the JSON access token file 
# saved by this example: Get SalesForce OAuth2 Access Token via Authorization Flow

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

# This is an example of a Salesforce OAuth2 access token to be refreshed:

# {
#   "access_token": "00D41000....uLZBpT6",
#   "refresh_token": "5Aep....25xdGgkrV",
#   "signature": "cjTbSc5DvcKpaMoRTzuQTJLb1tcMw8LEO01flq4aMD4=",
#   "scope": "refresh_token id",
#   "instance_url": "https://d41000000f8a0eak-dev-ed.my.salesforce.com",
#   "id": "https://login.salesforce.com/id/00D41000000F8A0EAK/005410000....xAAE",
#   "token_type": "Bearer",
#   "issued_at": "1738348388166"
# }

$oauth2 = New-Object Chilkat.OAuth2

$oauth2.TokenEndpoint = "https://login.salesforce.com/services/oauth2/token"

# Replace this with your actual client ID (Consumer Key)
$oauth2.ClientId = "CLIENT_ID"

# Note: The client secret is not required because we configured our Connected App
# to not require it for the refresh flow.  See the screenshot below.

# 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
}

# The response contains a new access token, but we must keep
# our existing refresh token for when we need to refresh again in the future.
$jsonToken.UpdateString("access_token",$oauth2.AccessToken)

# Save the new JSON access token response to a file.
$sbJson = New-Object Chilkat.StringBuilder
$jsonToken.EmitCompact = $false
$jsonToken.EmitSb($sbJson)
$sbJson.WriteFile("qa_data/tokens/_salesforce.json","utf-8",$false)

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

# --------------------------------------------------------------------------
# Here's a screenshot of a Salesforce Connected App 
# which does not requires the secret for the authorization or refresh flow.
#