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(C) Google Drive Refresh Access TokenDemonstrates how to automatically refresh the access token when it expires.
#include <C_CkJsonObject.h> #include <C_CkOAuth2.h> #include <C_CkFileAccess.h> void ChilkatSample(void) { BOOL success; HCkJsonObject json; const char *tokenFilePath; HCkOAuth2 oauth2; HCkFileAccess fac; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. success = TRUE; // This example uses a previously obtained access token having permission for the // Google Drive scope. // The access token (and refresh token) was previously saved to a JSON file with this format: // See Get Google Drive OAuth2 Access Token // { // "access_token": "ya29.Gls-BsdxTWuenChv ... yzVIrXikkLxu5T6dy4I6GjADFardoz4Lruw", // "expires_in": 3600, // "refresh_token": "1/tMBJ ... 27D-Hk6rpQYBA", // "scope": "https://www.googleapis.com/auth/drive", // "token_type": "Bearer" // } json = CkJsonObject_Create(); tokenFilePath = "qa_data/tokens/googleDrive.json"; CkJsonObject_LoadFile(json,tokenFilePath); oauth2 = CkOAuth2_Create(); CkOAuth2_putAccessToken(oauth2,CkJsonObject_stringOf(json,"access_token")); CkOAuth2_putRefreshToken(oauth2,CkJsonObject_stringOf(json,"refresh_token")); CkOAuth2_putAuthorizationEndpoint(oauth2,"https://accounts.google.com/o/oauth2/v2/auth"); CkOAuth2_putTokenEndpoint(oauth2,"https://www.googleapis.com/oauth2/v4/token"); // Replace these with actual values. CkOAuth2_putClientId(oauth2,"GOOGLE-CLIENT-ID"); CkOAuth2_putClientSecret(oauth2,"GOOGLE-CLIENT-SECRET"); CkOAuth2_putScope(oauth2,"https://www.googleapis.com/auth/drive"); // Use OAuth2 to refresh the access token. success = CkOAuth2_RefreshAccessToken(oauth2); if (success != TRUE) { printf("%s\n",CkOAuth2_lastErrorText(oauth2)); CkJsonObject_Dispose(json); CkOAuth2_Dispose(oauth2); return; } printf("%s\n",CkOAuth2_accessTokenResponse(oauth2)); // Save the new access token to our JSON file (so we can refresh it again when needed). CkJsonObject_UpdateString(json,"access_token",CkOAuth2_accessToken(oauth2)); fac = CkFileAccess_Create(); CkFileAccess_WriteEntireTextFile(fac,tokenFilePath,CkJsonObject_emit(json),"utf-8",FALSE); printf("Access Token Refreshed!\n"); CkJsonObject_Dispose(json); CkOAuth2_Dispose(oauth2); CkFileAccess_Dispose(fac); } |
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