Chilkat Examples

ChilkatHOME.NET Core C#Android™AutoItCC#C++Chilkat2-PythonCkPythonClassic ASPDataFlexDelphi ActiveXDelphi DLLGoJavaLianjaMono C#Node.jsObjective-CPHP ActiveXPHP ExtensionPerlPowerBuilderPowerShellPureBasicRubySQL ServerSwift 2Swift 3,4,5...TclUnicode CUnicode C++VB.NETVBScriptVisual Basic 6.0Visual FoxProXojo Plugin

Delphi DLL Examples

Web API Categories

ASN.1
AWS KMS
AWS Misc
Amazon EC2
Amazon Glacier
Amazon S3
Amazon S3 (new)
Amazon SES
Amazon SNS
Amazon SQS
Async
Azure Cloud Storage
Azure Key Vault
Azure Service Bus
Azure Table Service
Base64
Bounced Email
Box
CAdES
CSR
CSV
Certificates
Code Signing
Compression
DKIM / DomainKey
DNS
DSA
Diffie-Hellman
Digital Signatures
Dropbox
Dynamics CRM
EBICS
ECC
Ed25519
Email Object
Encryption
FTP
FileAccess
Firebase
GMail REST API
GMail SMTP/IMAP/POP
Geolocation
Google APIs
Google Calendar
Google Cloud SQL
Google Cloud Storage
Google Drive
Google Photos
Google Sheets
Google Tasks
Gzip
HTML-to-XML/Text
HTTP

HTTP Misc
IMAP
JSON
JSON Web Encryption (JWE)
JSON Web Signatures (JWS)
JSON Web Token (JWT)
Java KeyStore (JKS)
MHT / HTML Email
MIME
MS Storage Providers
Microsoft Graph
Misc
NTLM
OAuth1
OAuth2
OIDC
Office365
OneDrive
OpenSSL
Outlook
Outlook Calendar
Outlook Contact
PDF Signatures
PEM
PFX/P12
PKCS11
POP3
PRNG
REST
REST Misc
RSA
SCP
SCard
SFTP
SMTP
SSH
SSH Key
SSH Tunnel
ScMinidriver
SharePoint
SharePoint Online
Signing in the Cloud
Socket/SSL/TLS
Spider
Stream
Tar Archive
ULID/UUID
Upload
WebSocket
XAdES
XML
XML Digital Signatures
XMP
Zip
curl

 

 

 

(Delphi DLL) IMAP Auto-Refresh Office365 Access Token

See more Office365 Examples

Demonstrates how to automatically recover from an expired access token when OAuth2 authentication fails in the IMAP protocol. If the server responds with "NO AUTHENTICATE failed.", then we refresh the access token and retry.

Chilkat for Delphi Downloads

Chilkat non-ActiveX DLL for Delphi

Chilkat ActiveX DLL for Delphi

* The examples here use the non-ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, OAuth2, StringBuilder, Imap, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: HCkJsonObject;
success: Boolean;
imap: HCkImap;
loginLastErrorText: PWideChar;
oauth2: HCkOAuth2;
sbJson: HCkStringBuilder;

begin
// An Office365 OAuth2 access token must first be obtained prior
// to running this code.

// Getting the OAuth2 access token for the 1st time requires the O365 account owner's 
// interactive authorizaition via a web browser.  Afterwards, the access token
// can be repeatedly refreshed automatically.

// See the following examples for getting and refreshing an OAuth2 access token

// Get Office365 SMTP/IMAP/POP3 OAuth2 Access Token
// Refresh Office365 SMTP/IMAP/POP3 OAuth2 Access Token

// First get our previously obtained OAuth2 access token.
jsonToken := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/office365.json');
if (success = False) then
  begin
    Memo1.Lines.Add('Failed to open the office365 OAuth JSON file.');
    Exit;
  end;

imap := CkImap_Create();

CkImap_putSsl(imap,True);
CkImap_putPort(imap,993);

// Connect to the Office365 IMAP server.
success := CkImap_Connect(imap,'outlook.office365.com');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Use OAuth2 authentication.
CkImap_putAuthMethod(imap,'XOAUTH2');

// Login using our username (i.e. email address) and the access token for the password.
success := CkImap_Login(imap,'OFFICE365_EMAIL_ADDRESS',CkJsonObject__stringOf(jsonToken,'access_token'));
if (success <> True) then
  begin
    loginLastErrorText := CkImap__lastErrorText(imap);

    // If we're still connected to the mail server, then it means the server sent a non-success response,
    // Such as:  NO AUTHENTICATE failed.
    if (CkImap_IsConnected(imap) = True) then
      begin

        // Refresh the OAuth2 access token, and if successful, save the new (refreshed) access token and try authenticating again.
        oauth2 := CkOAuth2_Create();

        // Use your actual Directory (tenant) ID instead of "112d7ed6-71bf-4eba-a866-738364321bfc"
        CkOAuth2_putTokenEndpoint(oauth2,'https://login.microsoftonline.com/112d7ed6-71bf-4eba-a866-738364321bfc/oauth2/v2.0/token');

        // Replace these with your Azure App Registration's actual values.
        CkOAuth2_putClientId(oauth2,'CLIENT_ID');
        CkOAuth2_putClientSecret(oauth2,'CLIENT_SECRET');

        // Get the "refresh_token"
        CkOAuth2_putRefreshToken(oauth2,CkJsonObject__stringOf(jsonToken,'refresh_token'));

        // Send the HTTP POST to refresh the access token..
        success := CkOAuth2_RefreshAccessToken(oauth2);
        if (success <> True) then
          begin
            Memo1.Lines.Add(CkOAuth2__lastErrorText(oauth2));
            Exit;
          end;

        Memo1.Lines.Add('New access token: ' + CkOAuth2__accessToken(oauth2));
        Memo1.Lines.Add('New refresh token: ' + CkOAuth2__refreshToken(oauth2));

        // Update the JSON with the new tokens.
        CkJsonObject_UpdateString(jsonToken,'access_token',CkOAuth2__accessToken(oauth2));
        CkJsonObject_UpdateString(jsonToken,'refresh_token',CkOAuth2__refreshToken(oauth2));

        // Save the new JSON access token response to a file.
        sbJson := CkStringBuilder_Create();
        CkJsonObject_putEmitCompact(jsonToken,False);
        CkJsonObject_EmitSb(jsonToken,sbJson);
        CkStringBuilder_WriteFile(sbJson,'qa_data/tokens/office365.json','utf-8',False);

        Memo1.Lines.Add('New Access Token = ' + CkOAuth2__accessToken(oauth2));

        // Retry the login.
        success := CkImap_Login(imap,'OFFICE365_EMAIL_ADDRESS',CkJsonObject__stringOf(jsonToken,'access_token'));
        if (success = False) then
          begin
            Memo1.Lines.Add(CkImap__lastErrorText(imap));
            Exit;
          end;

      end
    else
      begin
        // Show the last error text for the call to Login
        Memo1.Lines.Add(loginLastErrorText);
        Exit;
      end;
  end
else
  begin
    Memo1.Lines.Add('O365 OAuth authentication is successful.');
  end;

// Do something...
success := CkImap_SelectMailbox(imap,'Inbox');
if (success <> True) then
  begin
    Memo1.Lines.Add(CkImap__lastErrorText(imap));
    Exit;
  end;

// Your application can continue to do other things in the IMAP session....

// When finished, logout and close the connection.
success := CkImap_Logout(imap);
success := CkImap_Disconnect(imap);

Memo1.Lines.Add('Finished.');

CkJsonObject_Dispose(jsonToken);
CkImap_Dispose(imap);
        CkOAuth2_Dispose(oauth2);
        CkStringBuilder_Dispose(sbJson);

end;

 

© 2000-2024 Chilkat Software, Inc. All Rights Reserved.