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.

Visual FoxPro

LOCAL lnSuccess
LOCAL loHttp
LOCAL lcBucketName
LOCAL lcStrXml
LOCAL loXml
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

lnSuccess = 0

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

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)

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