(Visual FoxPro) Backblaze S3 List Bucket Objects

See more Backblaze S3 Examples

Demonstrates how to list the objects in a bucket.

The Chilkat S3 functions in the HTTP class are compatible with the Backblaze service. However, because of some specific issues, Chilkat v9.5.0.89 or later is needed.

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

* 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')

* keyID = Access Key ID or Access Key
loHttp.AwsAccessKey = "access-key"

* applicationKey = Secret Access Key or Secret Key
loHttp.AwsSecretKey = "secret-key"

* Region is the 2nd part of your S3 Endpoint
loHttp.AwsEndpoint = "s3.us-west-002.backblazeb2.com"

lcBucketName = "chilkat-test"

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" standalone="yes"?>
* <ListBucketResult xmlns="http://s3.amazonaws.com/doc/2006-03-01/">
*     <Contents>
*         <ETag>"303fb46cf341094fef6274b7789cd6aa"</ETag>
*         <Key>orchard.json</Key>
*         <LastModified>2021-10-30T14:45:52.000Z</LastModified>
*         <Owner>
*             <ID>f2ebbc5f792c</ID>
*             <DisplayName/>
*         </Owner>
*         <Size>22</Size>
*         <StorageClass>STANDARD</StorageClass>
*     </Contents>
*     <Contents>
*         <ETag>"a8551f0a5437f43a796fca7623ee9232"</ETag>
*         <Key>seahorse.jpg</Key>
*         <LastModified>2021-10-30T14:38:53.000Z</LastModified>
*         <Owner>
*             <ID>f2ebbc5f792c</ID>
*             <DisplayName/>
*         </Owner>
*         <Size>24388</Size>
*         <StorageClass>STANDARD</StorageClass>
*     </Contents>
*     <IsTruncated>false</IsTruncated>
*     <MaxKeys>1000</MaxKeys>
*     <Name>chilkat-test</Name>
*     <Prefix/>
*     <Marker/>
* </ListBucketResult>

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

RELEASE loHttp
RELEASE loXml