SAP Open Connectors

Google Cloud Storage Authenticate a Connector Instance

You can authenticate with Google Cloud Storage to create your own instance of the Google Cloud Storage connector through the UI or through APIs. Once authenticated, you can use the connector instance to access the different functionalities offered by the Google Cloud Storage platform.

Authenticate Through the UI

Use the UI to authenticate with Google Cloud Storage and create a connector instance. Because you authenticate with Google Cloud Storage via OAuth 2.0, all you need to do is add a name for the instance and provide your OAuth API Key and API Secret. After you create the instance, you'll log in to Google to authorize SAP Open Connectors access your account. For more information about authenticating a connector instance, see Authenticate a Connector Instance (UI)

After successfully authenticating, we give you several options for next steps. Make requests using the API docs associated with the instance, map the instance to a common resource, or use it in a formula template

Authenticate Through API

Authenticating through API is similar to authenticating via the UI. Instead of clicking and typing through a series of buttons, text boxes, and menus, you will instead send a request to our /instances endpoint. The end result is the same: an authenticated connector instance with a token and id.

Authenticating through API follows a multi-step OAuth 2.0 process that involves:


1
Redirect URL




2
Authenticate Users




3
Authenticate Instance


Getting a Redirect URL


1
Redirect URL




2
Authenticate Users




3
Authenticate Instance


Use the following API call to request a redirect URL where the user can authenticate with the API provider. Replace {keyOrId} with the connector key, googlecloudstorage.

curl -X GET /Connectors/{keyOrId}/oauth/url?apiKey=<api_key>&apiSecret=<api_secret>&callbackUrl=<url>

Query Parameters

Query ParameterDescription
apiKeyThe API key or client ID obtained from registering your app with the provider. This is the Client ID that you recorded during Google Cloud Storage API Provider Setup.
apiSecretThe client secret obtained from registering your app with the API provider. This is the Client Secret that you recorded during Google Cloud Storage API Provider Setup.
callbackUrlThe URL that the API provider returns a user to after they authorize access. This is the Authorized Redirect URL that you recorded during Google Cloud Storage API Provider Setup.

Example cURL

curl -X GET \
  'https://api.openconnectors.us2.ext.hana.ondemand.com/elements/api-v2/elements/googlecloudstorage/oauth/url?apiKey=fake_api_key&apiSecret=fake_api_secret&callbackUrl=https://www.mycoolapp.com/auth&state=googlecloudstorage' \

Example Response

Use the oauthUrl in the response to allow users to authenticate with the vendor.

{
  "oauthUrl": "https://accounts.google.com/o/oauth2/auth?prompt=consent&access_type=offline&scope=https%3A%2F%2Fwww.googleapis.com%2Fauth%2Fdevstorage.full_control&response_type=code&redirect_uri=https%3A%2F%2Fauth.cloudelements.io%2Foauth&state=googlecloudstorage-dupe&client_id=10011628760-n0j35qr3ietmgse1cgavcngaubq06anm.apps.googleusercontent.com",
  "element": "googlecloudstorage"
}


Authenticating Users and Receiving the Authorization Grant Code


1
Redirect URL




2
Authenticate Users




3
Authenticate Instance


Provide the response from the previous step to the users. After they authenticate, Google Cloud Storage provides the following information in the response:

  • code
  • state
Response ParameterDescription
codeThe authorization grant code returned from the API provider in an OAuth 2.0 authentication workflow. SAP Open Connectors uses the code to retrieve the OAuth access and refresh tokens from the endpoint.
stateA customizable identifier, typically the connector key (googlecloudstorage) .
Note: If the user denies authentication and/or authorization, there will be a query string parameter called error instead of the code parameter. In this case, your application can handle the error gracefully.

Authenticating the Connector Instance


1
Redirect URL




2
Authenticate Users




3
Authenticate Instance


Use the /instances endpoint to authenticate with Google Cloud Storage and create a connector instance.

Note: The endpoint returns a connector instance token and id upon successful completion. Retain the token and id for all subsequent requests involving this connector instance.

To authenticate a connector instance:

  1. Construct a JSON body as shown below (see Parameters):

    {
      "element": {
        "key": "googlecloudstorage"
      },
      "name": "<INSTANCE_NAME>",
      "providerData": {
        "code": "XXXXXXXXXXXXXXXXXXXXXXX"
      },
      "configuration": {
        "filter.response.nulls": "true",
        "filemanagement.provider.bucket_name": "XXXXXXXXXXXX",
        "oauth.api.key": "XXXXXXXXXXXX",
        "oauth.api.secret": "XXXXXXXXXXX",
        "project.id": "XXXXXXXXXXXXX",
        "oauth.callback.url": "https://auth.cloudelements.io/oauth"
      }
    }
  2. Call the following, including the JSON body you constructed in the previous step:

    POST /instances
    
    Note: Make sure that you include the User and Organization keys in the header. For more information, see Authorization Headers, Organization Secret, and User Secret.
  3. Locate the token and id in the response and save them for all future requests using the connector instance.

Example cURL

curl -X POST https://api.openconnectors.us2.ext.hana.ondemand.com/elements/api-v2/instances \
 -H "Authorization: User <USER_SECRET>, Organization <ORGANIZATION_SECRET>"  \
 -H "Content-Type: application/json"  \
-d 
'{
  "name": "<INSTANCE_NAME>",
  "tags": [
    "xxxxxxxxx"
  ],
  "providerData": {
    "code": "<INSERT>"
  },
  "configuration": {
    "filter.response.nulls": "true",
    "filemanagement.provider.bucket_name": "XXXXXXXXXXXX",
    "oauth.api.key": "xxxxxxxxxxxx ",
    "oauth.api.secret": "xxxxxxxxxx",
    "project.id": "xxxxxxxxxxxxx"
  }
}'

Parameters

API parameters not shown in SAP Open Connectors are in code formatting.

ParameterDescriptionData Type
keyThe connector key.
googlecloudstorage
string
codeThe authorization grant code returned from the API provider in an OAuth 2.0 authentication workflow. SAP Open Connectors uses the code to retrieve the OAuth access and refresh tokens from the endpoint.string
Name
name
The name of the connector instance created during authentication.string
oauth.api.keyThe API key or client ID obtained from registering your app with the provider. This is the Client ID that you recorded  during API Provider Setup.string
oauth.api.secretThe client secret obtained from registering your app with the API provider. This is the Client Secret that you recorded during API Provider Setup.string
oauth.callback.urlThe URL that the API provider returns a user to after they authorize access. This is the Authorized Redirect URL that you recorded during API Provider Setup.
filemanagement.provider.bucket_name
The name of the bucket you created during API Provider Setup.
project.id
The id given by Google Cloud Platform after you create a project. Refer to API Provider Setup for more information.
tagsOptional. User-defined tags to further identify the instance.string

Example Response for an Authenticated Connector Instance

In this example, the instance ID is 12345 and the instance token starts with "ABC/D...". The actual values returned to you will be unique: make sure you save them for future requests to this new instance.

{
  "id": 12345,
  "name": "Google Cloud Storage",
  "key": "googlecloudstorage",
  "description": "Google Cloud Storage is a Restful online file storage web service for storing and accessing data on Google Cloud Platform infrastructure.",
  "image": "https://images.cloudelements.io/google-cloud-storage201908151321.png",
  "logo": "gcstorage",
  "active": true,
  "deleted": false,
  "typeOauth": false,
  "trialAccount": false,
  "configuration": [
          {
      "id": 300511,
      "name": "OAuth Scope",
      "key": "oauth.scope",
      "description": "Google Cloud Storage OAuth Scope",
      "defaultValue": "https://www.googleapis.com/auth/devstorage.full_control",
      "resellerConfig": false,
      "companyConfig": false,
      "active": true,
      "internal": false,
      "groupControl": false,
      "displayOrder": 1,
      "type": "TEXTFIELD_64",
      "hideFromConsole": true,
      "required": false
    }...
  ],
  "resources": [...],
  "objects": [...],
  "models": [...],
  "transformationsEnabled": true,
  "bulkDownloadEnabled": false,
  "bulkUploadEnabled": false,
  "cloneable": true,
  "extendable": false,
  "beta": false,
  "authentication": {...},
  "hooks": [...],
  "extended": false,
  "modelType": "basic",
  "useModelsForMetadata": true,
  "hub": "documents",
  "protocolType": "http",
  "parameters": [...],
  "private": true
}