Use the API Server and Google Cloud Storage ADO.NET Provider to Access Google Cloud Storage Data in Microsoft PowerPivot

This article will explain how to use the API Server and the ADO.NET Provider for Google Cloud Storage (or any of 200+ other ADO.NET Providers) to provide Google Cloud Storage data as OData services and then consume the data in Microsoft Excel's PowerPivot business intelligence tool. Follow the steps below to retrieve Google Cloud Storage data in Power Pivot.

Set Up the API Server

Follow the steps below to begin producing secure Google Cloud Storage OData services:

Deploy

The API Server runs on your own server. On Windows, you can deploy using the stand-alone server or IIS. On a Java servlet container, drop in the API Server WAR file. See the help documentation for more information and how-tos.

The API Server is also easy to deploy on Microsoft Azure, Amazon EC2, and Heroku.

Connect to Google Cloud Storage

After you deploy the API Server and the ADO.NET Provider for Google Cloud Storage, provide authentication values and other connection properties needed to connect to Google Cloud Storage by clicking Settings -> Connections and adding a new connection in the API Server administration console.

Authenticate with a User Account

You can connect without setting any connection properties for your user credentials. After setting InitiateOAuth to GETANDREFRESH, you are ready to connect.

When you connect, the Google Cloud Storage OAuth endpoint opens in your default browser. Log in and grant permissions, then the OAuth process completes

Authenticate with a Service Account

Service accounts have silent authentication, without user authentication in the browser. You can also use a service account to delegate enterprise-wide access scopes.

You need to create an OAuth application in this flow. See the Help documentation for more information. After setting the following connection properties, you are ready to connect:

• InitiateOAuth: Set this to GETANDREFRESH.
• OAuthJWTCertType: Set this to "PFXFILE".
• OAuthJWTCert: Set this to the path to the .p12 file you generated.
• OAuthJWTCertPassword: Set this to the password of the .p12 file.
• OAuthJWTCertSubject: Set this to "*" to pick the first certificate in the certificate store.
• OAuthJWTIssuer: In the service accounts section, click Manage Service Accounts and set this field to the email address displayed in the service account Id field.
• OAuthJWTSubject: Set this to your enterprise Id if your subject type is set to "enterprise" or your app user Id if your subject type is set to "user".
• ProjectId: Set this to the Id of the project you want to connect to.

The OAuth flow for a service account then completes.

You can then choose the Google Cloud Storage entities you want to allow the API Server access to by clicking Settings -> Resources.

Additionally, click Settings -> Server and set the Default Format to XML (Atom) for compatibility with Excel.

Authorize API Server Users

After determining the OData services you want to produce, authorize users by clicking Settings -> Users. The API Server uses authtoken-based authentication and supports the major authentication schemes. Access can also be restricted based on IP address; by default, only connections to the local machine are allowed. You can authenticate as well as encrypt connections with SSL.

Import Google Cloud Storage Tables in Power Pivot

Follow the steps below to import tables that can be refreshed on demand:

1. In Excel, click the PowerPivot Window icon in the PowerPivot tab to open PowerPivot.
2. Click Home -> Get External Data -> From Data Service -> From OData Data Feed.

3. Add authentication parameters. Click Advanced and set the Integrated Security option to Basic. You will need to enter the User Id and Password of a user who has access to the CData API Server. Set the password to the user's authtoken.

4. In the Base URL box, enter the OData URL of the CData API Server. For example, http://localhost:8032/api.rsc.

   

5. Select which tables you want to import and click Finish.

   

You can now work with Google Cloud Storage data in Power Pivot.