(Visual FoxPro) OSS List Bucket Objects (Alibaba Cloud)

See more Alibaba Cloud OSS Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with Alibaba Cloud's OSS service.

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LOCAL loHttp
LOCAL lcBucketName
LOCAL lcStrXml
LOCAL loXml
LOCAL lnSuccess
LOCAL lcKey
LOCAL lcLastModified
LOCAL lcETag
LOCAL lcSizeDecimalStr
LOCAL lcStorageClass
LOCAL lcID
LOCAL lcDisplayName
LOCAL lcListBucketResult_xmlns
LOCAL lcName
LOCAL lnMaxKeys
LOCAL lcIsTruncated
LOCAL i
LOCAL lnCount_i

* This example assumes the Chilkat HTTP API to have been previously unlocked.
* See Global Unlock Sample for sample code.

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Http')
loHttp = CreateObject('Chilkat.Http')

* Insert your AccessKey ID here:
loHttp.AwsAccessKey = "access-key"

* Insert your AccessKey Secret here:
loHttp.AwsSecretKey = "secret-key"

* To list objects in 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
loHttp.AwsEndpoint = "oss-us-east-1.aliyuncs.com"

lcBucketName = "chilkat"

lcStrXml = loHttp.S3_ListBucketObjects(lcBucketName)
IF (loHttp.LastMethodSuccess <> 1) THEN
    ? loHttp.LastErrorText
    RELEASE loHttp
    CANCEL
ENDIF

? "Response status code = " + STR(loHttp.LastStatus)

* For versions of Chilkat < 10.0.0, use CreateObject('Chilkat_9_5_0.Xml')
loXml = CreateObject('Chilkat.Xml')
lnSuccess = loXml.LoadXml(lcStrXml)
IF (lnSuccess <> 1) THEN
    ? loXml.LastErrorText
    RELEASE loHttp
    RELEASE loXml
    CANCEL
ENDIF

* If the response status code was not 200, then the XML response is not a 
* listing of objects, but instead contains error information.
IF (loHttp.LastStatus <> 200) THEN
    ? loXml.GetXml()
    ? "Failed."
    RELEASE loHttp
    RELEASE loXml
    CANCEL
ENDIF

* A sample response is shown below.
? loXml.GetXml()
? "----"

* Use this online tool to generate parsing code from sample XML: 
* Generate Parsing Code from XML

* <?xml version="1.0" encoding="UTF-8"?>
* <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
*     <Name>chilkat</Name>
*     <Prefix/>
*     <Marker/>
*     <MaxKeys>1000</MaxKeys>
*     <IsTruncated>false</IsTruncated>
*     <Contents>
*         <Key>orchard.json</Key>
*         <LastModified>2021-10-29T16:58:12.000Z</LastModified>
*         <ETag>"303FB46CF341094FEF6274B7789CD6AA"</ETag>
*         <Size>22</Size>
*         <StorageClass>STANDARD</StorageClass>
*         <Owner>
*             <ID>5035535379748121</ID>
*             <DisplayName>5035535379748121</DisplayName>
*         </Owner>
*     </Contents>
*     <Contents>
*         <Key>seahorse.jpg</Key>
*         <LastModified>2021-10-29T16:52:01.000Z</LastModified>
*         <ETag>"A8551F0A5437F43A796FCA7623EE9232"</ETag>
*         <Size>24388</Size>
*         <StorageClass>STANDARD</StorageClass>
*         <Owner>
*             <ID>5035535379748121</ID>
*             <DisplayName>5035535379748121</DisplayName>
*         </Owner>
* 
*     </Contents>
* </ListBucketResult>

lcListBucketResult_xmlns = loXml.GetAttrValue("xmlns")
lcName = loXml.GetChildContent("Name")
lnMaxKeys = loXml.GetChildIntValue("MaxKeys")
lcIsTruncated = loXml.GetChildContent("IsTruncated")
i = 0
lnCount_i = loXml.NumChildrenHavingTag("Contents")
DO WHILE i < lnCount_i
    loXml.I = i
    lcKey = loXml.GetChildContent("Contents[i]|Key")
    lcLastModified = loXml.GetChildContent("Contents[i]|LastModified")
    lcETag = loXml.GetChildContent("Contents[i]|ETag")
    lcSizeDecimalStr = loXml.GetChildContent("Contents[i]|Size")
    lcStorageClass = loXml.GetChildContent("Contents[i]|StorageClass")
    lcID = loXml.GetChildContent("Contents[i]|Owner|ID")
    lcDisplayName = loXml.GetChildContent("Contents[i]|Owner|DisplayName")
    i = i + 1
ENDDO

RELEASE loHttp
RELEASE loXml