Preparations for Using an SDK

Download an SDK and import it to a local development tool.

Log in to the DataArts Studio console.
Click DataArts DataService.
In the navigation pane, choose DataArts DataService Exclusive > SDKs.
On the SDKs page, download an SDK.

Verify integrity of the SDK. In Windows, open the CLI and run the following command to generate the SHA-256 value of the downloaded SDK. In the command, D:\java-sdk.zip is an example local path and name of the SDK. Replace it with the actual value.

certutil -hashfile D:\java-sdk.zip SHA256

The following is an example command output:

SHA-256 hash value of D:\java-sdk.zip
3a86f1ba249a00727db506e4075ec9630e6cf74f312bddf6c3901c9d0786f53e
CertUtil: -hashfile command executed.
3a86f1ba249a00727db506e4075ec9630e6cf74f312bddf6c3901c9d0786f53e

Compare the SHA-256 value of the downloaded SDK with that provided in the following table. If they are the same, no tampering or packet loss occurred during the package download.

**Table 1** SDK packages and the corresponding SHA-256 values
Language	SHA-256 Value of the SDK
Java	3a86f1ba249a00727db506e4075ec9630e6cf74f312bddf6c3901c9d0786f53e
Go	23734867eae2e7ef61427c64aa33aa89512571946f2f43a1a5fef5e801e3129f
Python	57636d8bacc459cab9dc08c70d01ccc42391ace60e6960c4e947566da1dc5d26
C#	e5a3b677f75c28ba3f1e16645d8171f7b6f34a42143f8a32a68bb18719b5e65d
JavaScript	442ac2fcb41d84525dc0139ec3f05d190e4e337cdbcdfdfc82a09d79d2ecd25e
PHP	2cc76bd2ecd48f00899d18b0f76d05ce2623065180f111c3f70ac14ddf0506f3
C++	2a54c3f2486d562ea6af1384eca40b301918bdc02f98bbf2c114f282dc059c00
C	4957556c108e0174d55b4b8d720f296967a9367ca54010792b1b3de039b87363
Android	0fdcc6fd93a68dce5c3e1b8e6370cc9340429cabfb0f268c3f9e5ea05238ae96

Prepare the parameters of the request message.

**Table 2** Parameters
Type	Description	Example
Path parameter	The path parameter is part of the URL. Use it to replace the parameter in {} in the URL.	Parameter: param = xxx Original URL: http://Domain name/p1/{param}/p2 Actual URL: http://Domain name/p1/xxx/p2
Query parameter	The query parameter is a supplementary part of the URL.	Parameter: param = xxx Parameter 2: param2 = xxx2 Example 1: Add the query parameter to a method (use the SDK of each language as an example). Example: request.addQueryStringParam("param"," xxx"); Example 2: Add a question mark (?) and the parameter to the end of the URL. If there are multiple parameters, separate them by ampersands (&). Original URL: http://Domain name/p1 Actual URL: http://Domain name/p1?param=xxx&param2=xxx2
Header parameter	The header parameter is part of the request header. The parameter name is case insensitive.	Parameter: param = xxx Add a header parameter to a method or add a header parameter when constructing a request (subject to the SDK of each language). Example: request.addHeader("param"," xxx");
Body parameter	The request body parameter is a JSON string in the SDK. This parameter is unavailable in earlier versions.	"{}"

Modify the SDK and obtain the signature parameter Authorization in the request header after the request is signed. In addition, add the x-Authorization parameter with the same value as Authorization. For details about how to obtain the Authorization parameter and add the x-Authorization parameter, see Preparation.