(Lianja) 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.

loHttp = createobject("CkHttp")

// 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 <> .T.) then
    ? loHttp.LastErrorText
    release loHttp
    return
endif

? "Response status code = " + str(loHttp.LastStatus)

loXml = createobject("CkXml")
llSuccess = loXml.LoadXml(lcStrXml)
if (llSuccess <> .T.) then
    ? loXml.LastErrorText
    release loHttp
    release loXml
    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 (loHttp.LastStatus <> 200) then
    ? loXml.GetXml()
    ? "Failed."
    release loHttp
    release loXml
    return
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