Chilkat HOME .NET Core C# Android™ AutoIt C C# C++ Chilkat2-Python CkPython Classic ASP DataFlex Delphi ActiveX Delphi DLL Go Java Lianja Mono C# Node.js Objective-C PHP ActiveX PHP Extension Perl PowerBuilder PowerShell PureBasic Ruby SQL Server Swift 2 Swift 3,4,5... Tcl Unicode C Unicode C++ VB.NET VBScript Visual Basic 6.0 Visual FoxPro Xojo Plugin
(Unicode C) OAuth2 for a GMail using a JSON Service Account KeyDemonstrates how get an OAuth2 access token for GMail (Google Service Account) using a JSON private key. After the access token is obtained, it may be used to send email. When the access token expires, a new access token needs to be obtained (using this same procedure). Note: This is for OAuth2 using Google Service account keys.
#include <C_CkFileAccessW.h> #include <C_CkAuthGoogleW.h> #include <C_CkSocketW.h> #include <C_CkMailManW.h> #include <C_CkEmailW.h> void ChilkatSample(void) { HCkFileAccessW fac; const wchar_t *jsonKey; HCkAuthGoogleW gAuth; HCkSocketW tlsSock; BOOL success; HCkMailManW mailman; HCkEmailW email; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // First load the JSON key into a string. fac = CkFileAccessW_Create(); jsonKey = CkFileAccessW_readEntireTextFile(fac,L"qa_data/googleApi/ChilkatTest-ab2ecd52ef98.json",L"utf-8"); if (CkFileAccessW_getLastMethodSuccess(fac) != TRUE) { wprintf(L"%s\n",CkFileAccessW_lastErrorText(fac)); CkFileAccessW_Dispose(fac); return; } // A JSON private key should look like this: // { // "type": "service_account", // "project_id": "chilkattest-1350", // "private_key_id": "fa2e36ee26986eab628b59868af8bec1d1c64c38", // "private_key": "-----BEGIN PRIVATE KEY-----\nMIIEvgIjFa...28N64N2n1E4FYzBZjSdy\n-----END PRIVATE KEY-----\n", // "client_email": "598922945226-00rb0ppfg0sndajo6bhvd4v17jtj2d3a@developer.gserviceaccount.com", // "client_id": "598922945226-00rb0ppfg0snd9jo7bhvd4v17jtj2d3a.apps.googleusercontent.com", // "auth_uri": "https://accounts.google.com/o/oauth2/auth", // "token_uri": "https://accounts.google.com/o/oauth2/token", // "auth_provider_x509_cert_url": "https://www.googleapis.com/oauth2/v1/certs", // "client_x509_cert_url": "https://www.googleapis.com/robot/v1/metadata/x509/598922945226-00rb0ppfg0sndajo6bhvd4v17jtj2d3a%40developer.gserviceaccount.com" // } gAuth = CkAuthGoogleW_Create(); CkAuthGoogleW_putJsonKey(gAuth,jsonKey); // Choose a scope. CkAuthGoogleW_putScope(gAuth,L"https://mail.google.com/"); // Request an access token that is valid for this many seconds. CkAuthGoogleW_putExpireNumSeconds(gAuth,3600); // If the application is requesting delegated access: // The email address of the user for which the application is requesting delegated access, // then set the email address here. (Otherwise leave it empty.) CkAuthGoogleW_putSubEmailAddress(gAuth,L""); // Connect to www.googleapis.com using TLS (TLS 1.2 is the default.) // The Chilkat socket object is used so that the connection can be established // through proxies or an SSH tunnel if desired. tlsSock = CkSocketW_Create(); success = CkSocketW_Connect(tlsSock,L"www.googleapis.com",443,TRUE,5000); if (success != TRUE) { wprintf(L"%s\n",CkSocketW_lastErrorText(tlsSock)); CkFileAccessW_Dispose(fac); CkAuthGoogleW_Dispose(gAuth); CkSocketW_Dispose(tlsSock); return; } // Send the request to obtain the access token. success = CkAuthGoogleW_ObtainAccessToken(gAuth,tlsSock); if (success != TRUE) { wprintf(L"%s\n",CkAuthGoogleW_lastErrorText(gAuth)); CkFileAccessW_Dispose(fac); CkAuthGoogleW_Dispose(gAuth); CkSocketW_Dispose(tlsSock); return; } // Examine the access token: wprintf(L"Access Token: %s\n",CkAuthGoogleW_accessToken(gAuth)); // Now that we have the access token, it may be used to send email // while it remains valid. Once the access token expires, a new access token // should be obtained using the same code as above. // ----------------------------------------------------------------------- mailman = CkMailManW_Create(); // Set the properties for the GMail SMTP server: CkMailManW_putSmtpHost(mailman,L"smtp.gmail.com"); CkMailManW_putSmtpPort(mailman,587); CkMailManW_putStartTLS(mailman,TRUE); CkMailManW_putSmtpUsername(mailman,L"YOUR_GOOGLE_APPS_USER_EMAIL_ADDRESS"); CkMailManW_putOAuth2AccessToken(mailman,CkAuthGoogleW_accessToken(gAuth)); // Create a new email object email = CkEmailW_Create(); CkEmailW_putSubject(email,L"This is a test"); CkEmailW_putBody(email,L"This is a test"); CkEmailW_putFrom(email,L"YOUR NAME <YOUR_GOOGLE_APPS_USER_EMAIL_ADDRESS>"); success = CkEmailW_AddTo(email,L"Chilkat Admin",L"admin@chilkatsoft.com"); // To add more recipients, call AddTo, AddCC, or AddBcc once per recipient. // Call SendEmail to connect to the SMTP server and send. // The connection (i.e. session) to the SMTP server remains // open so that subsequent SendEmail calls may use the // same connection. success = CkMailManW_SendEmail(mailman,email); if (success != TRUE) { wprintf(L"%s\n",CkMailManW_lastErrorText(mailman)); CkFileAccessW_Dispose(fac); CkAuthGoogleW_Dispose(gAuth); CkSocketW_Dispose(tlsSock); CkMailManW_Dispose(mailman); CkEmailW_Dispose(email); return; } // You may close the connection here. If the connection is kept open, // the next call to mailman.SendEmail will continue using the already-established connection // (and automatically re-connect if needed). success = CkMailManW_CloseSmtpConnection(mailman); if (success != TRUE) { wprintf(L"Connection to SMTP server not closed cleanly.\n"); } wprintf(L"Email Sent via GMail using an OAuth2 Service Account Key.\n"); CkFileAccessW_Dispose(fac); CkAuthGoogleW_Dispose(gAuth); CkSocketW_Dispose(tlsSock); CkMailManW_Dispose(mailman); CkEmailW_Dispose(email); } |
© 2000-2024 Chilkat Software, Inc. All Rights Reserved.