Common parameters-Enterprise Mobile Application Studio(EMAS)-阿里云帮助中心

Common request parameters

Common request parameters are parameters required for every API call.

Name	Type	Required	Description
Format	String	No	The format of the return value. JSON and XML are supported. The default value is XML.
Version	String	Yes	The API version. The version is in the `YYYY-MM-DD` date format. The current version is `2016-02-01`.
AccessKeyId	String	Yes	The AccessKey ID issued by Alibaba Cloud for service access.
Signature	String	Yes	The signature string. For more information about how to calculate a signature, see Signature mechanism.
SignatureMethod	String	Yes	The signature method. HMAC-SHA1 is supported.
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, `2016-02-25T12:00:00Z` represents 12:00:00 on February 25, 2016 (UTC).
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. Use a different random number for each request.

Example

https://httpdns-api.aliyuncs.com/
?Format=XML
&Version=2016-02-01
&AccessKeyId=testid
&Signature=Pc5WB8gokVn0xfeu%2FZV%2BiNM1dgI%3D
&SignatureMethod=HMAC-SHA1
&SignatureNonce=15215528852396
&SignatureVersion=1.0
&Timestamp=2016-02-25T12:00:00Z
&<API-specific parameters>
…

Common return parameters

For every API call, the system returns a unique identifier, RequestId, regardless of whether the call is successful.

XML example

<?xml version="1.0" encoding="UTF-8"?>
<!--The root node of the result-->
<APIName+Response>
    <!--The request ID tag-->
    <RequestId>4C467B38-3910-447D-87BC-AC049166F216</RequestId>
    <!--The returned result data-->
</APIName+Response>

JSON example

{
    "RequestId": "4C467B38-3910-447D-87BC-AC049166F216"
    /* The returned result data */
}