CDN prefetch

Function

After media files are published, you can call this API to request CDNs for media file pre-loading by ID or URL. Upon the first request, the CDN caches the requested media file for faster download and better user experience. One tenant can pre-load a maximum of 1,000 media files 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 files by media file ID.

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

{
  "asset_id" : "f488337c31c8e4622f1590735b134c65"
}

Prefetches media files by media file URL.

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

{
  "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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