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

Dim http As New Chilkat.Http

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

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

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

Dim bucketName As String
bucketName = "chilkat-test"

Dim strXml As String
strXml = http.S3_ListBucketObjects(bucketName)
If (http.LastMethodSuccess <> True) Then
    System.DebugLog(http.LastErrorText)
    Return
End If

System.DebugLog("Response status code = " + Str(http.LastStatus))

Dim xml As New Chilkat.Xml
Dim success As Boolean
success = xml.LoadXml(strXml)
If (success <> True) Then
    System.DebugLog(xml.LastErrorText)
    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 (http.LastStatus <> 200) Then
    System.DebugLog(xml.GetXml())
    System.DebugLog("Failed.")
    Return
End If

// A sample response is shown below.
System.DebugLog(xml.GetXml())
System.DebugLog("----")

// 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>

Dim ETag As String
Dim Key As String
Dim LastModified As String
Dim ID As String
Dim SizeDecimalStr As String
Dim StorageClass As String

Dim ListBucketResult_xmlns As String
ListBucketResult_xmlns = xml.GetAttrValue("xmlns")
Dim i As Int32
i = 0
Dim count_i As Int32
count_i = xml.NumChildrenHavingTag("Contents")
While i < count_i
    xml.I = i
    ETag = xml.GetChildContent("Contents[i]|ETag")
    Key = xml.GetChildContent("Contents[i]|Key")
    LastModified = xml.GetChildContent("Contents[i]|LastModified")
    ID = xml.GetChildContent("Contents[i]|Owner|ID")
    SizeDecimalStr = xml.GetChildContent("Contents[i]|Size")
    StorageClass = xml.GetChildContent("Contents[i]|StorageClass")
    i = i + 1
Wend
Dim IsTruncated As String
IsTruncated = xml.GetChildContent("IsTruncated")
Dim MaxKeys As Int32
MaxKeys = xml.GetChildIntValue("MaxKeys")
Dim Name As String
Name = xml.GetChildContent("Name")