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Sync Webhook examples

Example with payload modification

In this example we will see how to modify one of the fields of a content object in an external system. On each update of a Blog Post object we will increment the field edit_counter.

1. Add the edit_counter field to BlogPost CTD, set the field type to number and default value to 0.

2. Let's take the following simple app as an example of an external system:
   

   const express = require('express')
   const app = express();
   app.use(express.json());
   
   const port = 8000;
   
   app.post('/increment-edit-counter', (req, res) => {
     const payload = req.body.payload;
     payload.edit_counter + 1;  
     const response = {
       type: "response",
       subject: "content-object",
       event: "pre-create",
       response: {},
       payload: {payload}
     };
   
     res.send(response);
   })
   

3. Add a webhook:

   • give it a name (e.g. Edit counter)
   • set the type to Synchronous (block and wait for response)
   • provide the URL where your processing app is available
   • check the Enabled field
   • select the Update action to trigger the webhook
   • pick the Blog Post Content Type Definition as a source for thie webhook.
4. Once the webhook is added - each update on a Blog Post object will call the service above and the edit_counter field will be incremented!