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TodoAWSAuth

This sample demonstrates a Todo list application where the data is stored and accessed from a SimpleDB service in Amazon Web Services, with authentication occuring with a Google login.

The app functionality is:

  • View a list of tasks.
  • Add, edit, and delete tasks.
  • Set a task's status to 'done'.
  • Speak the task's name and notes fields.

In all cases the tasks are stored in a SimpleDB service in Amazon Web Services.

For more information about this sample see Consuming an Amazon SimpleDB Service, Authenticating Users with an Identity Provider and Authenticating Users with an Amazon SimpleDB Service.

Setting up an Amazon Cognito identity pool

In order to run this sample application an Amazon Cognito identity pool must first be created. This can be accomplished with the following steps:

  1. In a web browser, browse to the Amazon Web Services console and sign-up for an account.
  2. In the AWS Console, navigate to the Cognito service.
  3. In the Cognito console, click the Create new identity pool button. Give the identity pool a unique name and enable access to unauthenticated identities.
  4. In the Cognito Console, click the Create pool button.
  5. In the Cognito Console, expand View Details, expand View Policy Document for the unauthenticated identity, and click the Edit button.
  6. In the text box, add sdb:* as an action. The policy document should resemble the following example: 
    {  
"Version":"2012-10-17",
"Statement":[  
{  
  "Effect":"Allow",
  "Action":[  
    "mobileanalytics:PutEvents",
    "cognito-sync:*",
    "sdb:*"
  ],
  "Resource":[  
    "*"
  ]
}
]

} ```

  1. In the Cognito Console, click the Allow button.
  2. In the Cognito Console, ensure that the Sample code tab is selected and copy the identity pool ID from the Get AWS Credentials section to the clipboard.
  3. In Xamarin Studio or Visual Studio, load the TodoAWS solution, expand the TodoAWS project and paste the clipboard value into the Constants.CognitoIdentityPoolId property.

Configuring Google as an OAuth identity provider

In order to run this sample application a web application must be created at the Google Developers Console in order to obtain OAuth 2.0 credentials. This can be accomplished with the following steps:

  1. In a web browser, login to the Google Developers Console.
  2. In Google Developers Console, click Create Project, provide a Project name, then click Create.
  3. In Google Developers Console, click API & Auth > Consent screen, enter a Product name and click Save.
  4. In Google Developers Console, click API & Auth > Credentials, and click Create new Client ID.
  5. In the Create Client ID popup, ensure that the Web application radio button is selected, and enter a redirect URL into the Authorized redirect URIs such as http://blank.org/.
  6. In Google Developers Console, copy the Client ID value to the clipboard.
  7. In Xamarin Studio or Visual Studio, load the TodoAWSAuth solution, expand the TodoAWS project and paste the clipboard value into the Constants.ClientId property.
  8. In Google Developers Console, copy the Client secret value to the clipboard.
  9. In Xamarin Studio or Visual Studio, in the TodoAWS project, paste the clipboard value into the Constants.ClientSecret property.

Author

Jon La Marr