(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 <C_CkStringBuilder.h>
#include <C_CkJsonObject.h>
#include <C_CkHttp.h>
#include <C_CkHttpResponse.h>

void ChilkatSample(void)
    {
    HCkStringBuilder sbToken;
    HCkJsonObject json;
    HCkHttp http;
    const char *url;
    HCkHttpResponse resp;
    int responseCode;

    // 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..
    sbToken = CkStringBuilder_Create();
    CkStringBuilder_LoadFile(sbToken,"qa_data/tokens/googleCloudStorageAccessToken.txt","utf-8");

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

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

    json = CkJsonObject_Create();
    // Be careful if using the "regional" storage class.  See the note below about the 400 error response.
    CkJsonObject_UpdateString(json,"storageClass","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"

    http = CkHttp_Create();
    CkHttp_putAuthToken(http,CkStringBuilder_getAsString(sbToken));

    CkHttp_SetUrlVar(http,"bucket_name","chilkat-ocean");
    url = "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass";
    resp = CkHttp_PText(http,"PUT",url,CkJsonObject_emit(json),"utf-8","application/json",FALSE,FALSE);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkStringBuilder_Dispose(sbToken);
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        return;
    }

    responseCode = CkHttpResponse_getStatusCode(resp);
    if (responseCode == 401) {
        printf("%s\n",CkHttpResponse_bodyStr(resp));
        printf("If invalid credentials, then it is likely the access token expired.\n");
        printf("Your app should automatically fetch a new access token and re-try.\n");
        CkHttpResponse_Dispose(resp);
        CkStringBuilder_Dispose(sbToken);
        CkJsonObject_Dispose(json);
        CkHttp_Dispose(http);
        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. 

    printf("Response code: %d\n",responseCode);
    printf("Response body\n");
    printf("%s\n",CkHttpResponse_bodyStr(resp));

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

    CkHttpResponse_Dispose(resp);


    CkStringBuilder_Dispose(sbToken);
    CkJsonObject_Dispose(json);
    CkHttp_Dispose(http);

    }