Help Center/ Video On Demand/ API Reference/ Uploads media files/ Obtains authorization for multipart upload
Updated on 2024-12-04 GMT+08:00
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Obtains authorization for multipart upload

Function

When a client requests for creating a media file larger than 20 MB, the media file needs to be uploaded to OBS by part. The client needs to obtain the authorization using this API each time before uploading a file part to OBS.

This API is used to obtain a temporarily authorized URL for initializing a multipart upload, uploading parts, merging parts, listing uploaded parts, and canceling part merging. You need to configure the HTTP request method, request header, and request body by following the OBS API document. Then you can request for the corresponding temporarily authorized URL.

The multipart upload method is the same as that in the OBS API reference, including the HTTP request method, request header, and request body. This API is used to generate a URL with authentication information (sign_str) to replace the URL in the OBS API, so that the user has the temporary permission for uploading files to the bucket of VOD.

When calling the API for obtaining authorization, input bucket, object_key, and http_verb. bucket and object_key are obtained from the target field in the response body returned by the API for Uploading a Media Asset to VOD. http_verb varies depending on the specified operation.

URI

GET /v1.1/{project_id}/asset/authority

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.
Table 2 Query Parameters

Parameter

Mandatory

Type

Description

http_verb

Yes

String

HTTP method for calling the OBS API for multipart upload. For details about the suitable HTTP method, see the OBS API reference.

  • Initializing an upload task: POST

  • Uploading a part: PUT

  • Merging parts: POST

  • Canceling a part: DELETE

  • Listing uploaded parts: GET

bucket

Yes

String

Bucket name

Value of bucket obtained in the target field in the response body returned by the API for Uploading Media Files to VOD.

object_key

Yes

String

Object name

Value of object obtained in the target field in the response body returned by the API for Uploading Media Files to VOD.

content_type

No

String

Content type corresponding to the file type. This parameter is mandatory for upload task initialization.

For details about how to set parameters, see Uploading a Media File Greater Than 20 MB by Part.

  • Video file: video/Video format, for example, video/mp4

  • Audio file: audio/Audio format, for example, audio/mp3

  • Image file: image/Image format, for example, image/png

  • Subtitle file: application/octet-stream

content_md5

No

String

MD5 value of each uploaded part

upload_id

No

String

ID of each upload task, which is returned after OBS initializes the multipart upload task. This field is mandatory except in the upload task initialization scenario.

part_number

No

Integer

ID of each uploaded part

Value range: 1–10,000

Request Parameters

Table 3 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.

Response Parameters

Status code: 200

Table 4 Response body parameters

Parameter

Type

Description

sign_str

String

Signed URL. For details about the API calling example, see Example 2: Uploading a Media File More Than 20 MB by Part.Example: https://{obs_domain}/{bucket}?AWSAccessKeyId={AccessKeyID}&Expires={ExpiresValue}&Signature={Signature}

Status code: 403

Table 5 Response body parameters

Parameter

Type

Description

error_code

String

Error code

error_msg

String

Error description

Example Requests

  • Initializes an upload task

    GET https://{endpoint}/v1.1/{project_id}/asset/authority?http_verb=POST&content_type={type}&bucket={bucket}&object_key={objectKey}

  • Uploads a part

    GET https://{endpoint}/v1.1/{project_id}/asset/authority?http_verb=PUT&content_md5={md5}&part_number={num}&upload_id={id}&bucket={bucket}&object_key={objectKey}

  • Merges parts

    GET https://{endpoint}/v1.1/{project_id}/asset/authority?http_verb=POST&upload_id={id}&bucket={bucket}&object_key={objectKey}

  • Cancels a part

    GET https://{endpoint}/v1.1/{project_id}/asset/authority?http_verb=DELETE&bucket={bucket}&object_key={objectKey}&upload_id={uploadId}

  • Lists uploaded parts

    GET https://{endpoint}/v1.1/{project_id}/asset/authority?http_verb=GET&bucket={bucket}&object_key={objectKey}&upload_id={uploadId}

Example Responses

Status code: 200

The information is returned when the request succeeds.

{
  "sign_str" : "https://obs.cn-north-4.myhuaweicloud.com:443/obs-vod-1/%7Bproject_id%7D/f488337c31c8e4622f1590735b134c65/Avatar_480P.mp4?AWSAccessKeyId=CBN2J**********0RCSN&Expires=1518147618&Signature=kZYh0hEos2V**********AHGyXA%3D"
}

Status code: 403

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

200

The information is returned when the request succeeds.

403

The information is returned when the request fails.

Error Codes

See Error Codes.

Parent topic: Uploads media files