(DataFlex) 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.

Chilkat ActiveX Downloads ActiveX for 32-bit and 64-bit Windows

Use ChilkatAx-9.5.0-win32.pkg

Procedure Test
    Handle hoSbToken
    Boolean iSuccess
    Handle hoJson
    Handle hoHttp
    String sUrl
    Variant vResp
    Handle hoResp
    Integer iResponseCode
    String sTemp1
    Boolean bTemp1

    // 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..
    Get Create (RefClass(cComChilkatStringBuilder)) To hoSbToken
    If (Not(IsComObjectCreated(hoSbToken))) Begin
        Send CreateComObject of hoSbToken
    End
    Get ComLoadFile Of hoSbToken "qa_data/tokens/googleCloudStorageAccessToken.txt" "utf-8" To iSuccess

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

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

    Get Create (RefClass(cComChilkatJsonObject)) To hoJson
    If (Not(IsComObjectCreated(hoJson))) Begin
        Send CreateComObject of hoJson
    End
    // Be careful if using the "regional" storage class.  See the note below about the 400 error response.
    Get ComUpdateString Of hoJson "storageClass" "nearline" To iSuccess

    // ---- 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"

    Get Create (RefClass(cComChilkatHttp)) To hoHttp
    If (Not(IsComObjectCreated(hoHttp))) Begin
        Send CreateComObject of hoHttp
    End
    Get ComGetAsString Of hoSbToken To sTemp1
    Set ComAuthToken Of hoHttp To sTemp1

    Get ComSetUrlVar Of hoHttp "bucket_name" "chilkat-ocean" To iSuccess
    Move "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass" To sUrl
    Get ComEmit Of hoJson To sTemp1
    Get ComPText Of hoHttp "PUT" sUrl sTemp1 "utf-8" "application/json" False False To vResp
    If (IsComObject(vResp)) Begin
        Get Create (RefClass(cComChilkatHttpResponse)) To hoResp
        Set pvComObject Of hoResp To vResp
    End
    Get ComLastMethodSuccess Of hoHttp To bTemp1
    If (bTemp1 = False) Begin
        Get ComLastErrorText Of hoHttp To sTemp1
        Showln sTemp1
        Procedure_Return
    End

    Get ComStatusCode Of hoResp To iResponseCode
    If (iResponseCode = 401) Begin
        Get ComBodyStr Of hoResp To sTemp1
        Showln sTemp1
        Showln "If invalid credentials, then it is likely the access token expired."
        Showln "Your app should automatically fetch a new access token and re-try."
        Send Destroy of hoResp
        Procedure_Return
    End

    // 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. 

    Showln "Response code: " iResponseCode
    Showln "Response body"
    Get ComBodyStr Of hoResp To sTemp1
    Showln sTemp1

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

    Send Destroy of hoResp


End_Procedure