(CkPython) Office365 OAuth2 Access Token for SMTP, IMAP, POP

See more Office365 Examples

Demonstrates how to get an OAuth2 access token for use in the SMTP, IMAP, and POP3 protocols.

Note: It is only the initial access token that must be obtained interactively using a browser (see the code and comments below). Once the initial OAuth2 access token is obtained, then it can refreshed indefinitely with no user interaction.

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import sys
import chilkat

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

# -----------------------------------------------------------------------------------------------
# Important:  Setup your App Registration in Azure beforehand.  
# 
# See Create Azure App Registration for use with IMAP, POP3, and SMTP
# 
# Also, a detail that is often missed.  Make sure to specify "Web" for your Redirect URI.
# See Solution for Azure OAuth2 Error: Public clients can't send a client secret.
# -----------------------------------------------------------------------------------------------

oauth2 = chilkat.CkOAuth2()

# This should be the port in the localhost callback URL for your app.  
# The callback URL would look like "http://localhost:3017/" if the port number is 3017.
oauth2.put_ListenPort(3017)

# Specify your OAuth2 authorization and token endpoints
# Replace "xxxxxxxxxx-71bf-4ebe-a866-738364321bf2" with your tenant ID, 
# or one of the following keywords: "common", "organizations", "consumers".
# 
# For more information about the /authorize endpoint, see Microsoft identity platform and OAuth 2.0 authorization code flow 

oauth2.put_AuthorizationEndpoint("https://login.microsoftonline.com/xxxxxxxxxx-71bf-4ebe-a866-738364321bf2/oauth2/v2.0/authorize")
oauth2.put_TokenEndpoint("https://login.microsoftonline.com/xxxxxxxxxx-71bf-4ebe-a866-738364321bf2/oauth2/v2.0/token")

# Replace these with actual values.
oauth2.put_ClientId("CLIENT_ID")
oauth2.put_ClientSecret("CLIENT_SECRET")

oauth2.put_CodeChallenge(False)

# Provide a SPACE separated list of scopes.
# Important: The offline_access scope is needed to get a refresh token.
oauth2.put_Scope("openid profile offline_access https://outlook.office365.com/SMTP.Send https://outlook.office365.com/POP.AccessAsUser.All https://outlook.office365.com/IMAP.AccessAsUser.All")

# ----------------------------------------------------------------------
# Note: It is only the initial access token that must be obtained interactively using a browser.  
# Once the initial OAuth2 access token is obtained, then it can refreshed indefinitely with no user interaction.
# ----------------------------------------------------------------------

# Begin the OAuth2 three-legged flow.  This returns a URL that should be loaded in a browser.
url = oauth2.startAuth()
if (oauth2.get_LastMethodSuccess() != True):
    print(oauth2.lastErrorText())
    sys.exit()

# At this point, your application should load the URL in a browser.
# For example, 
# in C#: System.Diagnostics.Process.Start(url);
# in Java: Desktop.getDesktop().browse(new URI(url));
# in VBScript: Set wsh=WScript.CreateObject("WScript.Shell")
#              wsh.Run url
# in Xojo: ShowURL(url)  (see http://docs.xojo.com/index.php/ShowURL)
# in Dataflex: Runprogram Background "c:\Program Files\Internet Explorer\iexplore.exe" sUrl        
# The Microsoft account owner would interactively accept or deny the authorization request.

# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...
# Add the code to load the url in a web browser here...

# ----------------------------------------------------------------------
# Note: Read about how browser caching of credentials can cause problems.
# See OAuth2 Browser Caching Credentials
# ----------------------------------------------------------------------

# Now wait for the authorization.
# We'll wait for a max of 90 seconds.
numMsWaited = 0
while (numMsWaited < 90000) and (oauth2.get_AuthFlowState() < 3) :
    oauth2.SleepMs(100)
    numMsWaited = numMsWaited + 100

# If there was no response from the browser within 30 seconds, then 
# the AuthFlowState will be equal to 1 or 2.
# 1: Waiting for Redirect. The OAuth2 background thread is waiting to receive the redirect HTTP request from the browser.
# 2: Waiting for Final Response. The OAuth2 background thread is waiting for the final access token response.
# In that case, cancel the background task started in the call to StartAuth.
if (oauth2.get_AuthFlowState() < 3):
    oauth2.Cancel()
    print("No response from the browser!")
    sys.exit()

# Check the AuthFlowState to see if authorization was granted, denied, or if some error occurred
# The possible AuthFlowState values are:
# 3: Completed with Success. The OAuth2 flow has completed, the background thread exited, and the successful JSON response is available in AccessTokenResponse property.
# 4: Completed with Access Denied. The OAuth2 flow has completed, the background thread exited, and the error JSON is available in AccessTokenResponse property.
# 5: Failed Prior to Completion. The OAuth2 flow failed to complete, the background thread exited, and the error information is available in the FailureInfo property.
if (oauth2.get_AuthFlowState() == 5):
    print("OAuth2 failed to complete.")
    print(oauth2.failureInfo())
    sys.exit()

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

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

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

# Get the full JSON response:
json = chilkat.CkJsonObject()
json.Load(oauth2.accessTokenResponse())
json.put_EmitCompact(False)

# The JSON response looks like this:
# 
# {
#   "token_type": "Bearer",
#   "scope": "IMAP.AccessAsUser.All openid POP.AccessAsUser.All profile SMTP.Send email",
#   "expires_in": 3599,
#   "ext_expires_in": 3599,
#   "access_token": "...",
#   "refresh_token": "...",
#   "id_token": "...",
#   "expires_on": "1592748507"
# }

print(json.emit())

# Save the JSON to a file for future requests.
fac = chilkat.CkFileAccess()
fac.WriteEntireTextFile("qa_data/tokens/office365.json",json.emit(),"utf-8",False)