Chilkat2-Python

Adobe Sign OAuth2 Access Token

See more OAuth2 Examples

Demonstrates how to get an Adobe Sign OAuth2 access token from a desktop application or script. Chilkat2-Python

import sys
import chilkat2

success = False

# To further clarify, see OAuth 2.0 Authorization Flow

oauth2 = chilkat2.OAuth2()

# The Adobe Sign OAuth2 requires an "https" callback URL.  This means the "http://localhost:<portNumber>/" is not possible.
# For a desktop app, you must provide a script on your web server to redirect to "http://localhost:<portNumber>/"

# See Using Your Web Server as an Intermediary for OAuth2 Redirect to localhost

oauth2.AppCallbackUrl = "https://yourwebserver.com/OAuth2.php"
oauth2.ListenPort = 3017

oauth2.AuthorizationEndpoint = "https://secure.na2.echosign.com/public/oauth"
oauth2.TokenEndpoint = "https://api.na2.echosign.com/oauth/token"

# Replace these with actual values.
oauth2.ClientId = "MY_CLIENT_ID"

# This is for Require Proof Key for Code Exchange (PKCE)
# See OAuth2 PKCE Explained
oauth2.CodeChallenge = True
oauth2.CodeChallengeMethod = "S256"

# Indicate the desired access by listing scopes.
oauth2.Scope = "user_read agreement_read workflow_read"

# Begin the OAuth2 Authorization code flow.  This returns a URL that should be loaded in a browser.
url = oauth2.StartAuth()
if (oauth2.LastMethodSuccess != True):
    print(oauth2.LastErrorText)
    sys.exit()

print("url = " + url)

# Launch the default browser on the system and navigate to the url.
# The LaunchBrowser method was added in Chilkat v10.1.2.
success = oauth2.LaunchBrowser(url)
if (success == False):
    print(oauth2.LastErrorText)
    sys.exit()

# Wait for the user to approve or deny authorization in the browser.
numMsWaited = 0
while (numMsWaited < 90000) and (oauth2.AuthFlowState < 3) :
    oauth2.SleepMs(100)
    numMsWaited = numMsWaited + 100

# If the browser does not respond within the specified time, AuthFlowState will be:
# 
# 1: Waiting for Redirect – The OAuth2 background thread is waiting for the browser's redirect request.
# 2: Waiting for Final Response – The thread is awaiting the final access token response.
# In either case, cancel the background task initiated by StartAuth.

if (oauth2.AuthFlowState < 3):
    oauth2.Cancel()
    print("No response from the browser!")
    sys.exit()

# Check AuthFlowState to determine if authorization was granted, denied, or failed:
# 
# 3: Success – OAuth2 flow completed, the background thread exited, and the successful response is in AccessTokenResponse.
# 4: Access Denied – OAuth2 flow completed, the background thread exited, and the error response is in AccessTokenResponse.
# 5: Failure – OAuth2 flow failed before completion, the background thread exited, and error details are in FailureInfo.

if (oauth2.AuthFlowState == 5):
    print("OAuth2 failed to complete.")
    print(oauth2.FailureInfo)
    sys.exit()

if (oauth2.AuthFlowState == 4):
    print("OAuth2 authorization was denied.")
    print(oauth2.AccessTokenResponse)
    sys.exit()

if (oauth2.AuthFlowState != 3):
    print("Unexpected AuthFlowState:" + str(oauth2.AuthFlowState))
    sys.exit()

# Save the full JSON access token response to a file.
sbJson = chilkat2.StringBuilder()
sbJson.Append(oauth2.AccessTokenResponse)
sbJson.WriteFile("qa_data/tokens/adobe-sign-access-token.json","utf-8",False)

# The full JSON received looks like this:
# {
#   "access_token": "3AAABL ... YCpUu",
#   "refresh_token": "3AAABL ... tpDs0*",
#   "token_type": "Bearer",
#   "expires_in": 3600
# }

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