Chilkat Examples

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(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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_Http
string ls_BucketName
string ls_StrXml
oleobject loo_Xml
integer li_Success
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

// 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_9_5_0.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_9_5_0.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

 

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