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(Java) Refresh GMail IMAP OAuth2 Access TokenDemonstrates how to refresh an access token GMail IMAP read/write access.
import com.chilkatsoft.*; public class ChilkatExample { static { try { System.loadLibrary("chilkat"); } catch (UnsatisfiedLinkError e) { System.err.println("Native code library failed to load.\n" + e); System.exit(1); } } public static void main(String argv[]) { // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. // See Get GMail IMAP OAuth2 Access Token for Desktop App // for sample code showing how to obtain a GMail IMAP read/write access token. // It is assumed we previously obtained an OAuth2 access token for GMail. CkJsonObject jsonToken = new CkJsonObject(); boolean success = jsonToken.LoadFile("qa_data/tokens/_gmailFullAccess.json"); if (success != true) { System.out.println("Failed to load _gmailFullAccess.json"); return; } // The access token JSON looks something like this: // { // "access_token": "abac.Ci-ZabcdF37-NUrmSzxbHxTsMbtlN-uPfabcdAQN_2ekzj0s5ofCzRabcdTDMGaa2Q", // "token_type": "Bearer", // "expires_in": 3600, // "refresh_token": "1/lEe5abcdNJ77eOSDBabcdkQGVmDalkwabcdR2Hatbo" // } // CkOAuth2 oauth2 = new CkOAuth2(); oauth2.put_TokenEndpoint("https://www.googleapis.com/oauth2/v4/token"); // Replace these with actual values. oauth2.put_ClientId("GOOGLE-CLIENT-ID"); oauth2.put_ClientSecret("GOOGLE-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) { System.out.println(oauth2.lastErrorText()); return; } System.out.println("New access token: " + oauth2.accessToken()); // The response contains a new access token, but we must keep // our existing refresh token for when we need to refresh again in the future. jsonToken.UpdateString("access_token",oauth2.accessToken()); // Save the new JSON access token response to a file. CkStringBuilder sbJson = new CkStringBuilder(); jsonToken.put_EmitCompact(false); jsonToken.EmitSb(sbJson); sbJson.WriteFile("qa_data/tokens/_gmailFullAccess.json","utf-8",false); System.out.println("Access token refreshed!"); System.out.println("New Access Token = " + oauth2.accessToken()); } } |
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