Common request parameters

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The Alibaba Cloud Visual Intelligence API is based on the Remote Procedure Call (RPC) protocol. Each API operation must include common request parameters.

Request example

http://objectdet.cn-shanghai.aliyuncs.com/?Signature=NAxwl1W9ROkidJfGeZrsKUXw%2BQ****
&AccessKeyId=testId
&Action=DetectMainBody
&Format=JSON
&RegionId=cn-shanghai
&SignatureMethod=HMAC-SHA1
&SignatureNonce=313ef0fb-0393-464f-a6e2-59d9ca2585b1
&SignatureVersion=1.0
&Timestamp=2019-10-12T08%3A18%3A18Z
&Version=2019-12-30

Request parameters

Name

Type

Required

Description

Signature

String

Yes

The request signature. This is the final generated signature string. For more information about how to generate a request signature, see Request signature.

AccessKeyId

String

Yes

The ID of the AccessKey that you use to access the service. For more information, see Create an AccessKey.

Action

String

Yes

The name of the API operation.

Format

String

No

The format of the response message.

Valid values: JSON (default) and XML.

RegionId

String

No

The ID of the region that the API supports.

Example: cn-shanghai.

SignatureMethod

String

Yes

The signature method.

Valid value: HMAC-SHA1.

SignatureNonce

String

Yes

A unique random number for the signature. It is used to prevent replay attacks. Use a different random number for each request. If you use Java, generate this number using java.util.UUID.randomUUID().

SignatureVersion

String

Yes

The version of the signature algorithm.

Valid value: 1.0.

Timestamp

String

Yes

The timestamp of the request. The timestamp must be in UTC and follow the ISO 8601 standard. The format is YYYY-MM-DDThh:mm:ssZ.

For example, 2019-10-13T10:00:00Z is 18:00:00 on October 13, 2019 (UTC+8).

Version

String

Yes

The version number of the API operation. The format is YYYY-MM-DD.

Valid value: 2019-12-30.