Help Center/ Video On Demand/ API Reference/ Media Asset Refresh/ CDN Cache Refresh
Updated on 2026-02-27 GMT+08:00
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CDN Cache Refresh

Function

For media assets in completed, deleted, or published status, you can call this API to update their information in CDN by specifying the corresponding asset IDs or URLs. This operation forcibly expires the cached resources on CDN PoPs. When a user accesses a resource, CDN pulls the latest version from the origin server, returns it to the user, and caches it on CDN PoPs. One tenant can update a maximum of 1,000 media assets per day.

Authorization Information

Each account has all the permissions required to call all APIs, but IAM users must be assigned the required permissions.

  • If you are using role/policy-based authorization, see Permissions Policies and Supported Actions for details on the required permissions.
  • If you are using identity policy-based authorization, the following identity policy-based permissions are required.

    Action

    Access Level

    Resource Type (*: required)

    Condition Key

    Alias

    Dependencies

    vod:asset:createRefreshTask

    Write

    assets *

    vod:AssetLabel

    -

    -

URI

POST /v1/{project_id}/asset/refresh

Table 1 Path Parameters

Parameter

Mandatory

Type

Description

project_id

Yes

String

Project ID. For details about how to obtain the project ID, see Obtaining a Project ID.

Request Parameters

Table 2 Request header parameters

Parameter

Mandatory

Type

Description

X-Auth-Token

No

String

User token. This parameter is mandatory when token authentication is used.

It can be obtained by calling the IAM API used to obtain a user token. The value of X-Subject-Token in the response header is the user token.

Authorization

No

String

Authentication information. This parameter is mandatory for AK/SK authentication.

X-Sdk-Date

No

String

Time when a request is sent. This parameter is mandatory for AK/SK authentication.
Table 3 Request body parameters

Parameter

Mandatory

Type

Description

asset_id_list

No

Array of strings

ID list of media assets in the completed, deleted, or published status. A maximum of 10 media asset IDs can be refreshed at a time.

urls

No

Array of strings

Streaming URL list of media assets in the completed, deleted, or published status. A maximum of 10 media asset URLs can be refreshed at a time.

A single URL can contain up to 10,240 characters.

Response Parameters

Status code: 202

Table 4 Response body parameters

Parameter

Type

Description

task_id

String

Refresh task ID.

Status code: 400

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

Error code.

error_msg

String

Error description.

Example Requests

  • This example updates media assets by media asset ID.

    POST https://{endpoint}/v1/{project_id}/asset/refresh

{
  "asset_id_list" : [ "f488337c31c8e4622f1590735b134c65", "f360035c0f5833cf8e8b83e6df845187" ]
}

  • This example updates media assets by media asset URL.

    POST https://{endpoint}/v1/{project_id}/asset/refresh

{
  "urls" : [ "https://example.com/asset/9db42f5e08c15edecd99a98da241994a/313bfd52a75f95ff48e8bf02eca2ab20.flv", "https://example.com/asset/9e455adb02295aa123809e8dc7ca51c1/68b1241af3bf58bcde9914626e07f5af.mp4", "https://example.com/asset/9e455adb02295aa123809e8dc7ca51c1/play_video/68b1241af3bf58bcde9914626e07f5af_H.264_480X270_HEAACV1_300.mp4" ]
}

Example Responses

Status code: 202

Returned when the request succeeded.

{
  "task_id" : "5199337c31c8e4622f1590735b13a263"
}

Status code: 400

Returned when the request failed.

{
  "error_code" : "VOD.10053",
  "error_msg" : "The request parameter is illegal, illegal field: {xx}."
}

Status Codes

Status Code

Description

202

Returned when the request succeeded.

400

Returned when the request failed.

Error Codes

See Error Codes.

Parent topic: Media Asset Refresh