(Go) 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.

    http := chilkat.NewHttp()

    // keyID = Access Key ID or Access Key
    http.SetAwsAccessKey("access-key")

    // applicationKey = Secret Access Key or Secret Key
    http.SetAwsSecretKey("secret-key")

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

    bucketName := "chilkat-test"

    strXml := http.S3_ListBucketObjects(bucketName)
    if http.LastMethodSuccess() != true {
        fmt.Println(http.LastErrorText())
        http.DisposeHttp()
        return
    }

    fmt.Println("Response status code = ", http.LastStatus())

    xml := chilkat.NewXml()
    success := xml.LoadXml(*strXml)
    if success != true {
        fmt.Println(xml.LastErrorText())
        http.DisposeHttp()
        xml.DisposeXml()
        return
    }

    // 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 {
        fmt.Println(*xml.GetXml())
        fmt.Println("Failed.")
        http.DisposeHttp()
        xml.DisposeXml()
        return
    }

    // A sample response is shown below.
    fmt.Println(*xml.GetXml())
    fmt.Println("----")

    // 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>

    var ETag *string = new(string)
    var Key *string = new(string)
    var LastModified *string = new(string)
    var ID *string = new(string)
    var SizeDecimalStr *string = new(string)
    var StorageClass *string = new(string)

    ListBucketResult_xmlns := xml.GetAttrValue("xmlns")
    i := 0
    count_i := xml.NumChildrenHavingTag("Contents")
    for i < count_i {
        xml.SetI(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
    }

    IsTruncated := xml.GetChildContent("IsTruncated")
    MaxKeys := xml.GetChildIntValue("MaxKeys")
    Name := xml.GetChildContent("Name")

    http.DisposeHttp()
    xml.DisposeXml()