This topic describes common parameters, including common request parameters and common response parameters. Common parameters are required by all API operations.

Common request parameters

Common request parameters are required by all API operations.

Table 1. Common request parameters
Parameter Type Required Description
RegionId string Yes The region where the Security Center instance is deployed.

Valid values:

  • Default: indicates all regions except the Malaysia (Kuala Lumpur) region. Regions in China are included.
  • ap-southeast-3: the Malaysia (Kuala Lumpur) region.
Format string No The format in which to return the response.

Valid values: JSON and XML. Default value: JSON.

Version String Yes The version number of the API. The value is in the YYYY-MM-DD format.

Set the value to 2018-12-03.

AccessKeyId String Yes The AccessKey ID provided to you by Alibaba Cloud.
Signature String Yes The signature string of the current request.
SignatureMethod String Yes The encryption method of the signature string.

Set the value to HMAC-SHA1.

Timestamp String Yes The timestamp of the request. Specify the time in the ISO 8601 standard in the YYYY-MM-DDThh:mm:ssZ format. The time must be in UTC.

For example, you can set the value to 2013-01-10T12:00:00Z to indicate 20:00:00 on January 10, 2013 (UTC+8).

SignatureVersion String Yes The version of the signature algorithm. The current version is 1.0.
SignatureNonce String Yes A unique, random number used to prevent replay attacks.

You must use different numbers for different requests.
ResourceOwnerAccount String No The account that owns the resource to be accessed by this API request.
Sample requests 
https://tds.aliyuncs.com/?Action=DescribeDomainNames
&Timestamp=2014-05-19T10%3A33%3A56Z
&Format=xml
&AccessKeyId=testid
&SignatureMethod=Hmac-SHA1
&SignatureNonce=NwDAxvLU6tFE0DVb
&Version=2018-12-03
&SignatureVersion=1.0
&Signature=Signature

Common response parameters

API responses use the HTTP response format. A 2xx status code indicates a successful call and a 4xx or 5xx status code indicates a failed call.

Responses can be returned in the JSON or XML format. The default response format is JSON. You can specify the format when you call an operation.

Every response returns a unique RequestId regardless of whether the call is successful.
  • XML format 
    <? xml version="1.0" encoding="utf-8"? > 
    <!--Result Root Node-->
    <Interface Name+Response>
        <!--Return Request Tag-->
        <RequestId>4C467B38-3910-447D-87BC-AC049166F216</RequestId>
        <!--Return Result Data-->
    </Interface Name+Response>
  • JSON format 
    {
    "RequestId":"4C467B38-3910-447D-87BC-AC049166F216",
    /*The returned result*/
    }