(Ruby) Docusign Refresh OAuth2 Access Token

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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 Ruby Downloads install from rubygems.org gem install chilkat or download... Ruby Library for Windows, MacOS, Linux, Alpine Linux

require 'chilkat'

# 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 = Chilkat::CkJsonObject.new()
success = jsonToken.LoadFile("qa_data/tokens/docusign.json")
if (success != true)
    print "Failed to load docusign.json" + "\n";
    exit
end

# The access token JSON looks like this:

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

oauth2 = Chilkat::CkOAuth2.new()

# 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.put_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.put_ClientId("MY_DOCUSIGN_CLIENT_ID")
# This is your secret key for the authorization code grant.
oauth2.put_ClientSecret("MY_DOCUSIGN_CLIENT_SECRET")

# Get the "refresh_token"
oauth2.put_RefreshToken(jsonToken.stringOf("refresh_token"))

# Send the HTTP POST to refresh the access token..
success = oauth2.RefreshAccessToken()
if (success != true)
    print oauth2.lastErrorText() + "\n";
    exit
end

print "New access token: " + oauth2.accessToken() + "\n";
print "New refresh token: " + oauth2.refreshToken() + "\n";

# 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 = Chilkat::CkStringBuilder.new()
jsonToken.put_EmitCompact(false)
jsonToken.EmitSb(sbJson)
sbJson.WriteFile("qa_data/tokens/docusign.json","utf-8",false)

print "OAuth2 authorization granted!" + "\n";
print "New Access Token = " + oauth2.accessToken() + "\n";