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(PHP Extension) POP3 Auto-Refresh Office365 Access TokenSee more Office365 ExamplesDemonstrates how to automatically recover from an expired OAuth2 access token when OAuth2 authentication fails in the POP3 protocol. If the server responds with "-ERR Authentication failure: unknown user name or bad password.", then we refresh the access token and retry.
<?php // The version number (9_5_0) should match version of the Chilkat extension used, omitting the micro-version number. // For example, if using Chilkat v9.5.0.48, then include as shown here: include("chilkat_9_5_0.php"); // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. $mailman = new CkMailMan(); $mailman->put_MailHost('outlook.office365.com'); $mailman->put_MailPort(995); $mailman->put_PopSsl(true); // Use your O365 email address here. $mailman->put_PopUsername('OFFICE365_EMAIL_ADDRESS'); // When using OAuth2 authentication, leave the password empty. $mailman->put_PopPassword(''); // Load our previously obtained OAuth2 access token. $jsonToken = new CkJsonObject(); $success = $jsonToken->LoadFile('qa_data/tokens/office365.json'); if ($success == false) { print $jsonToken->lastErrorText() . "\n"; exit; } $mailman->put_OAuth2AccessToken($jsonToken->stringOf('access_token')); // Make the TLS connection to the outlook.office365.com POP3 server. $success = $mailman->Pop3Connect(); if ($success != true) { print $mailman->lastErrorText() . "\n"; exit; } // Authenticate using XOAUTH2 $success = $mailman->Pop3Authenticate(); if ($success != true) { // If we're still connected to the mail server, then it means the server sent a non-success response, // Such as: -ERR Authentication failure: unknown user name or bad password. if ($mailman->get_IsPop3Connected() == true) { // Refresh the OAuth2 access token, and if successful, save the new (refreshed) access token and try authenticating again. $oauth2 = new CkOAuth2(); // Use your actual Directory (tenant) ID instead of "112d7ed6-71bf-4eba-a866-738364321bfc" $oauth2->put_TokenEndpoint('https://login.microsoftonline.com/112d7ed6-71bf-4eba-a866-738364321bfc/oauth2/v2.0/token'); // Replace these with your Azure App Registration's actual values. $oauth2->put_ClientId('CLIENT_ID'); $oauth2->put_ClientSecret('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; } 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 = new CkStringBuilder(); $jsonToken->put_EmitCompact(false); $jsonToken->EmitSb($sbJson); $sbJson->WriteFile('qa_data/tokens/office365.json','utf-8',false); print 'New Access Token = ' . $oauth2->accessToken() . "\n"; // Update the mailman with the new access token. $mailman->put_OAuth2AccessToken($oauth2->accessToken()); // Retry the authentication. $success = $mailman->Pop3Authenticate(); if ($success == false) { print $mailman->lastErrorText() . "\n"; exit; } } else { print $mailman->lastErrorText() . "\n"; exit; } } // Find out how many emails are on the server.. $numEmails = $mailman->CheckMail(); if ($numEmails < 0) { print $mailman->lastErrorText() . "\n"; exit; } // Examine the POP3 session log: print $mailman->pop3SessionLog() . "\n"; // The POP3 session log will look something like this: // **** Connected to outlook.office365.com:995 // < +OK The Microsoft Exchange POP3 service is ready. [QwBIADIAUABSADEANgBDAEEAMAAwADEAMgAuAG4AYQBtAHAAcgBkADEANgAuAHAAcgBvAGQALgBvAHUAdABsAG8AbwBrAC4AYwBvAG0A] // > AUTH XOAUTH2 // < + // > <base64 string in XOAUTH2 format> // < -ERR Authentication failure: unknown user name or bad password. // > AUTH XOAUTH2 // < + // > <base64 string in XOAUTH2 format> // < +OK User successfully authenticated. // > STAT // < +OK 248 46637086 // End the POP3 session and close the connection to the GMail server. $success = $mailman->Pop3EndSession(); if ($success != true) { print $mailman->lastErrorText() . "\n"; exit; } print 'Finished.' . "\n"; ?> |
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