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(C) Refresh Cloud Storage OAuth2 Access Token (Authorization Code Flow)See more Google Cloud Storage ExamplesDemonstrates how to refresh an expired or soon-to-expire Cloud Storage OAuth2 access token obtained by the Authorization Code Flow (i.e. NOT for a Service Account).
#include <C_CkJsonObject.h> #include <C_CkOAuth2.h> #include <C_CkStringBuilder.h> void ChilkatSample(void) { HCkJsonObject jsonToken; BOOL success; HCkOAuth2 oauth2; HCkStringBuilder sbJson; // This example requires the Chilkat API to have been previously unlocked. // See Global Unlock Sample for sample code. jsonToken = CkJsonObject_Create(); success = CkJsonObject_LoadFile(jsonToken,"qa_data/tokens/googleCloudStorage.json"); if (success != TRUE) { printf("Failed to load googleCloudStorage.json\n"); CkJsonObject_Dispose(jsonToken); return; } // The access token JSON looks like this: // { // "access_token": "ya29.a0Ad52N3_4eOd5_T7....", // "token_type": "Bearer", // "expires_in": 3600, // "refresh_token": "1/lEe5abcdNJ77eOSDBabcdkQGVmDalkwabcdR2Hatbo" // } // oauth2 = CkOAuth2_Create(); 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"); // 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) { printf("%s\n",CkOAuth2_lastErrorText(oauth2)); CkJsonObject_Dispose(jsonToken); CkOAuth2_Dispose(oauth2); return; } // 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. CkJsonObject_UpdateString(jsonToken,"access_token",CkOAuth2_accessToken(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/googleCloudStorage.json","utf-8",FALSE); printf("OAuth2 authorization granted!\n"); printf("New Access Token = %s\n",CkOAuth2_accessToken(oauth2)); CkJsonObject_Dispose(jsonToken); CkOAuth2_Dispose(oauth2); CkStringBuilder_Dispose(sbJson); } |
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