(PowerShell) Docusign Refresh OAuth2 Access Token

See more DocuSign Examples

Demonstrates how to refresh a Docusign OAuth2 access token. The refresh does not require user interaction via a web browser. If an access token expires (typically with a 401 response code), a new access token can be automatically obtained by using the code in this example.

For more information, see https://developers.docusign.com/esign-rest-api/guides/authentication/oauth2-code-grant

Chilkat .NET Downloads Chilkat .NET Assemblies

Add-Type -Path "C:\chilkat\ChilkatDotNet47-9.5.0-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 Docusign OAuth2 Access Token

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

# The access token JSON looks like this:

# {
#   "access_token": "eyJ0eXA....YQyig",
#   "token_type": "Bearer",
#   "refresh_token": "eyJ0eXA....auE3eHKg",
#   "expires_in": 28800
# }

$oauth2 = New-Object Chilkat.OAuth2

# For the developer sandbox environment, the token endpoint is https://account-d.docusign.com/oauth/token
# For the production platform, the token endpoint is https://account.docusign.com/oauth/token
$oauth2.TokenEndpoint = "https://account-d.docusign.com/oauth/token"

# Replace these with actual values.
# The client ID is also known as the "integration key" in Docusign.
$oauth2.ClientId = "MY_DOCUSIGN_CLIENT_ID"
# This is your secret key for the authorization code grant.
$oauth2.ClientSecret = "MY_DOCUSIGN_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
}

$("New access token: " + $oauth2.AccessToken)
$("New refresh token: " + $oauth2.RefreshToken)

# Update the JSON with the new tokens.
$jsonToken.UpdateString("access_token",$oauth2.AccessToken)
$jsonToken.UpdateString("refresh_token",$oauth2.RefreshToken)

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

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