CSS supports the live streaming callback feature. You can create and configure a callback template in the console, set an address to receive the callback of a triggering event, and associate the template with a push domain name. After the successful association, if an event configured in the template triggers the callback during a live streaming, Tencent Cloud will actively send a request to the customer server which is responsible for the response. After verification, a JSON packet of the callback can be obtained through the path corresponding to the event.
This document describes how to create, modify and delete a callback template in the console.

You can create a callback template in the following ways:

• Create a template in the CSS Console. For more information, please see Creating a Callback Template.
• Create a template through APIs.

Notes

• After a template has been created, you can associate it with a push domain name. The association will take effect in about 5-10 minutes.
• The HTTP or HTTPS server, whose address is configured as the callback address in the template to receive the callback, must be able to receive the request and respond normally.
• The callback templates are managed at the domain name level in the console, and rules created by APIs cannot be canceled for the time being. If you associated a template with a specified stream through the callback APIs and want to unassociate it, you need to call the DeleteLiveCallbackRule API.
• For more information on CSS callback protocols, please see Event Message Notification Protocol.
• For more information on CSS callback parameters and examples, please see Event Message Notification Parameter Descriptions.
• For more information on CSS callback notification parameters, please see the following:
  • CSS push event
  • CSS stream interruption event
  • CSS recording file generation event
  • CSS screenshot file generation event
  • Screencapture and porn detection result file generation event

Creating a Callback Template

1. Log in to the CSS Console.
2. Select Feature Configuration > CSS Callback on the left sidebar.
3. Click + to create a callback template, enter configuration information in the pop-up window, and click Save.
   

   Configuration Item	Description
   Template Name	Name of the callback template. It contains only letters, digits, underscores, and dashes, with a length of up to 30 characters.
   Template Description	Description of the callback template. It contains only letters, digits, underscores, and dashes, with a length of up to 100 characters.
   Callback Key	Custom callback key. It contains only letters and digits with a length of up to 32 characters. For more information, please see Event Message Notification.
   Push Callback	Enter an address starting with `http`, `https`, etc. to receive the push callback.
   Interruption Callback	Enter an address starting with `http`, `https`, etc. to receive the interruption callback.
   Recording Callback	Enter an address starting with `http`, `https`, etc. to receive the recording callback.
   Screencapture Callback	Enter an address starting with `http`, `https`, etc. to receive the screencapture callback.
   Porn Detection Callback	Enter an address starting with `http`, `https`, etc. to receive the porn detection callback.

Modifying a Template

1. Select Feature Configuration > CSS Callback .
2. Find the desired callback template that you have created, and click Edit on the right to modify template information.
3. Click Save.

Deleting a Template

If the template is associated, you need to unassociate it before you can delete it. For more information, please see Unassociating a Callback Template.

1. Select Feature Configuration > CSS Callback .
2. Find the desired callback template that you have created, and click the deletion icon at the top.
3. In the pop-up window, click OK to confirm the deletion.