PowerBuilder

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.

PowerBuilder

integer li_rc
integer li_Success
oleobject loo_Http
string ls_BucketName
string ls_StrXml
oleobject loo_Xml
string ls_ETag
string ls_Key
string ls_LastModified
string ls_ID
string ls_SizeDecimalStr
string ls_StorageClass
string ls_ListBucketResult_xmlns
integer i
integer li_Count_i
string ls_IsTruncated
integer li_MaxKeys
string ls_Name

li_Success = 0

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

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat.Http")
if li_rc < 0 then
    destroy loo_Http
    MessageBox("Error","Connecting to COM object failed")
    return
end if

// keyID = Access Key ID or Access Key
loo_Http.AwsAccessKey = "access-key"

// applicationKey = Secret Access Key or Secret Key
loo_Http.AwsSecretKey = "secret-key"

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

ls_BucketName = "chilkat-test"

ls_StrXml = loo_Http.S3_ListBucketObjects(ls_BucketName)
if loo_Http.LastMethodSuccess <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_Http
    return
end if

Write-Debug "Response status code = " + string(loo_Http.LastStatus)

loo_Xml = create oleobject
li_rc = loo_Xml.ConnectToNewObject("Chilkat.Xml")

li_Success = loo_Xml.LoadXml(ls_StrXml)
if li_Success <> 1 then
    Write-Debug loo_Xml.LastErrorText
    destroy loo_Http
    destroy loo_Xml
    return
end if

// If the response status code was not 200, then the XML response is not a 
// listing of objects, but instead contains error information.
if loo_Http.LastStatus <> 200 then
    Write-Debug loo_Xml.GetXml()
    Write-Debug "Failed."
    destroy loo_Http
    destroy loo_Xml
    return
end if

// A sample response is shown below.
Write-Debug loo_Xml.GetXml()
Write-Debug "----"

// 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>

ls_ListBucketResult_xmlns = loo_Xml.GetAttrValue("xmlns")
i = 0
li_Count_i = loo_Xml.NumChildrenHavingTag("Contents")
do while i < li_Count_i
    loo_Xml.I = i
    ls_ETag = loo_Xml.GetChildContent("Contents[i]|ETag")
    ls_Key = loo_Xml.GetChildContent("Contents[i]|Key")
    ls_LastModified = loo_Xml.GetChildContent("Contents[i]|LastModified")
    ls_ID = loo_Xml.GetChildContent("Contents[i]|Owner|ID")
    ls_SizeDecimalStr = loo_Xml.GetChildContent("Contents[i]|Size")
    ls_StorageClass = loo_Xml.GetChildContent("Contents[i]|StorageClass")
    i = i + 1
loop
ls_IsTruncated = loo_Xml.GetChildContent("IsTruncated")
li_MaxKeys = loo_Xml.GetChildIntValue("MaxKeys")
ls_Name = loo_Xml.GetChildContent("Name")


destroy loo_Http
destroy loo_Xml