(PureBasic) OSS Download File (Alibaba Cloud)
      Demonstrates how to download a file from an AliCloud OSS bucket.
The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service. 
		
 
      IncludeFile "CkHttp.pb"
Procedure ChilkatExample()
    ; This requires the Chilkat API to have been previously unlocked.
    ; See Global Unlock Sample for sample code.
    http.i = CkHttp::ckCreate()
    If http.i = 0
        Debug "Failed to create object."
        ProcedureReturn
    EndIf
    ; Insert your AccessKey ID here:
    CkHttp::setCkAwsAccessKey(http, "access-key")
    ; Insert your AccessKey Secret here:
    CkHttp::setCkAwsSecretKey(http, "secret-key")
    ; To download from a bucket located in a different region, use the endpoint for that region, such as "oss-cn-hangzhou.aliyuncs.com 	"
    ; See Alibaba Object Storage Service Regions and Endpoints
    CkHttp::setCkAwsEndpoint(http, "oss-us-east-1.aliyuncs.com")
    bucketName.s = "chilkat"
    objectName.s = "seahorse.jpg"
    localFilePath.s = "qa_output/seahorse.jpg"
    success.i = CkHttp::ckS3_DownloadFile(http,bucketName,objectName,localFilePath)
    If success <> 1
        Debug CkHttp::ckLastErrorText(http)
    Else
        Debug "File downloaded."
    EndIf
    CkHttp::ckDispose(http)
    ProcedureReturn
EndProcedure
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