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Elastic File Storage

Call methods

Common Parameters

Public request parameters are required for all endpoints. Developers must include these parameters in every Volcano Engine API request to avoid request failures. Capitalize the first letter of each common request parameter to distinguish interface request parameters.

Action and Version

tip

Action and Version must be included in the Query.

Name	Category	Required	Example value	Description
Action	String	Yes	CreateFileSystem	Interface name that indicates the action to perform. List of actions supported by file storage. See API Overview.
Version	String	Yes	2025-01-01	The version information of the interface. The current version is 2025-01-01.
X-Expires	Int	Not supported	300	Signature valid duration in seconds. The default is 900 seconds.

Signature parameter

The signature parameter is a required part of the request and can be included in either the Header or Query.

Scenarios for using Header

Name	Category	Required	Description	Example value
X-Date	String	Yes	Use UTC time with second-level precision. Use the ISO 8601 standard format: YYYYMMDD'T'HHMMSS'Z'.	20201103T104027Z
Authorization	String	Yes	Standard HTTP authentication header fields. The format is HMAC-SHA256 Credential={AccessKeyId}/{ShortDate}/{Region}/{Service}/request, SignedHeaders={SignedHeaders}, Signature={Signature}.	HMAC-SHA256 Credential=AKLTMjI2ODVlYzI3ZGY1NGU4ZjhjYWRjMTlmNTM5OTZkYzE/20201230/cn-north-1/iam/request, SignedHeaders=content-type;host;x-content-sha256;x-date, Signature=28eeabbbd726b87002e0fe58ad8c1c768e619b06e2646f35b6ad7ed029a6d8a7

The information in Authorization is explained in the following table.

Name	Category	Remarks
AccessKey	String	Requested AccessKey information. For instructions on viewing AK/SK information, see Access Key Management.
ShortDate	String	Short date of the request, accurate to the day. Use UTC time. Example: 20180201.
Region	String	Region of the request, for example: North China 2 (Beijing): cn-beijing.
ServiceName	String	The requested service, currently efs.
SignedHeaders	String	Headers involved in the signature, separated by semicolons.
Signature	String	Signature calculation completed. For details on calculating the signature, see Signature Methods.

In the Query scenario

tip

X-Date and Authorization information can be included directly in the Query

Name	Category	Required	Description	Example value
X-Date	String	Yes	Use UTC time with second-level precision. Format follows the ISO 8601 standard: YYYYMMDD'T'HHMMSS'Z'.	20201103T104027Z
X-Algorithm	String	Yes	This is a fixed value, reserved for future expansion.	HMAC-SHA256
X-Credential	String	Yes	Composed of {AccessKey}/{ShortDate}/{Region}/{Service}/request.	AKLTMjI2ODVlYzI3ZGY1NGU4ZjhjYWRjMTlmNTM5OTZkYzE/20201230/cn-north-1/iam/request
X-SignedHeaders	String	Yes	Headers involved in the signature, separated by semicolons.	content-type;host;x-content-sha256;x-date
X-Signature	String	Yes	The calculated signature. For details on signature calculation methods, see Signature Methods.	28eeabbbd726b87002e0fe58ad8c1c768e619b06e2646f35b6ad7ed029a6d8a7

For more details, see Common Parameters.

Last updated: 2026.04.08 15:05:25