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SAP Open Connectors supports events via polling or webhooks depending on the API provider. For more information about our Events framework, see Events Overview.

Supported Events and Resources

SAP Open Connectors supports polling events for Gmail. After receiving an event, SAP Open Connectors standardizes the payload and sends an event to the configured callback URL of your authenticated connector instance.

You can set up polling for the changed-messages resource. You can also copy the changed-messages configuration to poll other resources. See Configure Polling Through API for more information.

Configure Polling Through the UI

To configure polling through the UI, follow the same steps to authenticate a connector instance, and then turn on events. Select the resources to poll, and then click Create Instance. For more information, see Authenticate an Connector Instance with Events (UI) or the connector-specific authentication topic.

Configure Polling Through API

Use the /instances endpoint to authenticate with Google and create a connector instance with polling enabled.

To authenticate a connector instance with polling:

1. Get an authorization grant code by completing the steps in Getting a redirect URL and Authenticating users and receiving the authorization grant code.

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

   {
     "element":{
       "key":"gmail"
     },
     "providerData":{
       "code": "<AUTHORIZATION_GRANT_CODE>"
     },
     "configuration":{
       "oauth.api.key": "<Google app Client ID>",
       "oauth.api.secret": "<Google app Client secret>",
       "oauth.callback.url": "<Google app Authorized redirect URI>",
       "event.notification.enabled": true,
       "event.notification.callback.url": "http://mycoolapp.com",
       "event.poller.refresh_interval": "<minutes>",
       "event.poller.configuration":{
         "/changed-messages": {
           "url": "/hubs/general/changed-message",
           "idField": "id"
         }
       }
     },
     "tags":[
       "<Add_Your_Tag>"
     ],
     "name":"<INSTANCE_NAME>"
   }
   

3. 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.

4. Locate the token and id in the response and save them for all future requests using the connector instance.

Example cURL with Polling

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 '{
"element": {
  "key": "gmail"
},
"providerData":{
  "code": "<AUTHORIZATION_GRANT_CODE>"
},
"configuration": {
    "oauth.api.key": "xxxxxxxxxxxxxxxxxx",
    "oauth.api.secret": "xxxxxxxxxxxxxxxxxxxxxxxx",
    "oauth.callback.url":"https://auth.mycoolapp.com/oauth",
    "event.notification.enabled": true,
      "event.notification.callback.url": "https://cloud-element.com/elements/api-v2/events/page.elementKey/",
    "event.poller.refresh_interval": "15",
    "event.poller.configuration":{
      "changed-messages": {
        "url": "/hubs/general/changed-messages",
        "idField": "id"
      }
    }
  },
  "tags": [
    "Docs"
  ],
  "name": "API Instance with Polling"
}'

Parameters

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