(Unicode C++) Manage Bucket Storage Class

See more Google Cloud Storage Examples

Demonstrates how to manage a bucket's default storage class.

See Cloud Storage Classes for information about storage classes.

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#include <CkStringBuilderW.h>
#include <CkJsonObjectW.h>
#include <CkHttpW.h>
#include <CkHttpResponseW.h>

void ChilkatSample(void)
    {
    // This example requires the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    // This example uses a previously obtained access token having permission for the 
    // scope "https://www.googleapis.com/auth/cloud-platform"

    // In this example, Get Google Cloud Storage OAuth2 Access Token, 
    // the service account access token was saved to a text file.  This example fetches the access token from the file..
    CkStringBuilderW sbToken;
    sbToken.LoadFile(L"qa_data/tokens/googleCloudStorageAccessToken.txt",L"utf-8");

    // ---- Step 1
    // Create the JSON body of the PUT request that will be sent.

    // {
    //   "storageClass": "[STORAGE_CLASS]"
    // }
    // 

    CkJsonObjectW json;
    // Be careful if using the "regional" storage class.  See the note below about the 400 error response.
    json.UpdateString(L"storageClass",L"nearline");

    // ---- Step 2
    // Send a PUT equivalent to this curl command

    // curl -X PUT --data-binary @[JSON_FILE_NAME].json \
    //     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
    //     -H "Content-Type: application/json" \
    //     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]?fields=storageClass"

    CkHttpW http;
    http.put_AuthToken(sbToken.getAsString());

    http.SetUrlVar(L"bucket_name",L"chilkat-ocean");
    const wchar_t *url = L"https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass";
    CkHttpResponseW *resp = http.PText(L"PUT",url,json.emit(),L"utf-8",L"application/json",false,false);
    if (http.get_LastMethodSuccess() == false) {
        wprintf(L"%s\n",http.lastErrorText());
        return;
    }

    int responseCode = resp->get_StatusCode();
    if (responseCode == 401) {
        wprintf(L"%s\n",resp->bodyStr());
        wprintf(L"If invalid credentials, then it is likely the access token expired.\n");
        wprintf(L"Your app should automatically fetch a new access token and re-try.\n");
        delete resp;
        return;
    }

    // On my first try at running this code, I received the following error response:
    // Response code: 400
    // Response body
    // {
    //  "error": {
    //   "errors": [
    //    {
    //     "domain": "global",
    //     "reason": "invalid",
    //     "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
    //    }
    //   ],
    //   "code": 400,
    //   "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
    //  }
    // }
    // 

    // This was because my storage location was a Multi-regional location, and I tried to assign the "regional" storage class,
    // which is not allowed. 

    wprintf(L"Response code: %d\n",responseCode);
    wprintf(L"Response body\n");
    wprintf(L"%s\n",resp->bodyStr());

    // A response code = 200 indicates success, and the response body contains the JSON
    // 
    // Response code: 200
    // Response body
    // {
    //  "storageClass": "NEARLINE"
    // }
    // 

    delete resp;
    }