Xbase++

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.

Xbase++

LOCAL nSuccess
LOCAL oHttp
LOCAL cBucketName
LOCAL cStrXml
LOCAL oXml
LOCAL cETag
LOCAL cKey
LOCAL cLastModified
LOCAL cID
LOCAL cSizeDecimalStr
LOCAL cStorageClass
LOCAL cListBucketResult_xmlns
LOCAL i
LOCAL nCount_i
LOCAL cIsTruncated
LOCAL nMaxKeys
LOCAL cName

nSuccess := 0

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

oHttp := CreateObject("Chilkat.Http")

//  keyID = Access Key ID or Access Key
oHttp:AwsAccessKey := "access-key"

//  applicationKey = Secret Access Key or Secret Key
oHttp:AwsSecretKey := "secret-key"

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

cBucketName := "chilkat-test"

cStrXml := oHttp:S3_ListBucketObjects(cBucketName)
IF (oHttp:LastMethodSuccess != 1)
    ? oHttp:LastErrorText
    oHttp:destroy()
    RETURN
ENDIF

? "Response status code = " + Str(oHttp:LastStatus)

oXml := CreateObject("Chilkat.Xml")
nSuccess := oXml:LoadXml(cStrXml)
IF (nSuccess != 1)
    ? oXml:LastErrorText
    oHttp:destroy()
    oXml:destroy()
    RETURN
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 (oHttp:LastStatus != 200)
    ? oXml:GetXml()
    ? "Failed."
    oHttp:destroy()
    oXml:destroy()
    RETURN
ENDIF

//  A sample response is shown below.
? oXml: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>

cListBucketResult_xmlns := oXml:GetAttrValue("xmlns")
i := 0
nCount_i := oXml:NumChildrenHavingTag("Contents")
DO WHILE i < nCount_i
    oXml:I := i
    cETag := oXml:GetChildContent("Contents[i]|ETag")
    cKey := oXml:GetChildContent("Contents[i]|Key")
    cLastModified := oXml:GetChildContent("Contents[i]|LastModified")
    cID := oXml:GetChildContent("Contents[i]|Owner|ID")
    cSizeDecimalStr := oXml:GetChildContent("Contents[i]|Size")
    cStorageClass := oXml:GetChildContent("Contents[i]|StorageClass")
    i := i + 1
ENDDO
cIsTruncated := oXml:GetChildContent("IsTruncated")
nMaxKeys := oXml:GetChildIntValue("MaxKeys")
cName := oXml:GetChildContent("Name")

oHttp:destroy()
oXml:destroy()