Display the Thumbnail

After fetching the thumbnail URL, you may like to view the thumbnail. But you cannot view the thumbnail image through any browser. Viewing a thumbnail requires applications like Postman (by using a 3-legged token) to send the request URL and receive the thumbnail image in response.

By the end of this task, you will be able to:

• Configure a 3-Legged Token for the request.
• View a thumbnail using the GET request in Postman.

For this tutorial, we have saved the view thumbnail query in the postman collection in a GitHub repository for you to use.

The following steps will guide you through the process of configuring the collections in Postman:

1. Download the ZIP file containing the Postman Collection from this GitHub repository.
2. Extract the ZIP file to an accessible drive location to import collection.
3. In Postman, use the Import button on the top-left to import the Postman collection. See Importing and exporting data in Postman for more information.

1. In the Postman sidebar, find the ‘Manufacturing Data Model Tutorial’ collection and select the View Thumbnail request. You should see screen similar to the following:
   
2. In the center area, click the Authorization tab (if it is not selected).
3. In the Configure New Token section:
   1. In the Type dropdown, verify that the selected Authorization type is OAuth 2.0 (Refer 1 in the provided image).
   2. In the Add authorization data to dropdown, verify that the field value is set to Request Headers (Refer 2 in the provided image).
   3. In the Client ID box, enter the Client ID of the app, you obtained this ID when you were following the instructions in Before you begin, (Refer 3 in the provided image).
   4. In the Client Secret box, enter the Client Secret of the app, you obtained this ID when you were following the instructions in Before you begin, (Refer 4 in the provided image).
   5. In the Authorization tab, scroll down to the bottom and click Get New Access Token, (Refer 5 in the provided image).

The following image will help you to correlate to the task mentioned earlier.

In this step, you obtain an access token to authenticate your view thumbnail request.

1. In the Autodesk Sign in screen that pops up, sign in, giving your app permission to act on your behalf.
   
2. In the Manage Access Tokens screen that is displayed after you successfully authorize, click Use Token.
   

Note: If you are unable to observe any of the expected results, check if you have specified the Client ID and Client secret correctly.

1. In the Postman address bar, enter the Thumbnail URL from the previous Get Thumbnail URL.
2. Verify that the request method is set to GET.
3. Click Send.

   After working through the steps above, you should be able to see a thumbnail in the body of the response.