CDN prefetch

Function

After a media asset is published, you can call this API to request CDN for media asset prefetch by media asset ID or URL. Upon the first request, the CDN caches the requested media asset for faster download and better user experience. One tenant can prefetch a maximum of 1,000 media assets per day.

URI

POST /v1.0/{project_id}/asset/preheating

**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 a token.
Authorization	No	String	Authentication information. This parameter is mandatory for AK/SK authentication.
X-Sdk-Date	No	String	Time when the request is sent. This parameter is mandatory for AK/SK authentication.

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
asset_id	No	String	ID of a published media asset
urls	No	Array of strings	Streaming URL list of published media assets. A maximum of 10 URLs can be prefetched at a time.

Response Parameters

Status code: 202

**Table 4** Response body parameters
Parameter	Type	Description
task_id	String	Prefetch 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

Prefetches media assets by media asset ID.

POST https://{endpoint}/v1.0/{project_id}/asset/preheating

Content-Type: application/json

{
  "asset_id": "f488337c31c8e4622f1590735b134c65"
}

Prefetches media assets by media asset URL.

POST https://{endpoint}/v1.0/{project_id}/asset/preheating

Content-Type: application/json{  "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

The information is returned when the request succeeds.

{
  "task_id" : "5199337c31c8e4622f1590735b13a263"
}

Status code: 400

The information is returned when the request fails.

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

Status Codes

Status Code	Description
202	The information is returned when the request succeeds.
400	The information is returned when the request fails.

Error Codes

See Error Codes.

Parent topic: Media file pre-loading

Previous topic: Media file pre-loading

Next topic: Queries information of CDN prefetch

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