C#

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.

C#

bool success = false;

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

Chilkat.Http http = 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";

string bucketName = "chilkat-test";

string strXml = http.S3_ListBucketObjects(bucketName);
if (http.LastMethodSuccess != true) {
    Debug.WriteLine(http.LastErrorText);
    return;
}

Debug.WriteLine("Response status code = " + Convert.ToString(http.LastStatus));

Chilkat.Xml xml = new Chilkat.Xml();
success = xml.LoadXml(strXml);
if (success != true) {
    Debug.WriteLine(xml.LastErrorText);
    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) {
    Debug.WriteLine(xml.GetXml());
    Debug.WriteLine("Failed.");
    return;
}

// A sample response is shown below.
Debug.WriteLine(xml.GetXml());
Debug.WriteLine("----");

// 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>

string ETag;
string Key;
string LastModified;
string ID;
string SizeDecimalStr;
string StorageClass;

string ListBucketResult_xmlns = xml.GetAttrValue("xmlns");
int i = 0;
int 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;
}

string IsTruncated = xml.GetChildContent("IsTruncated");
int MaxKeys = xml.GetChildIntValue("MaxKeys");
string Name = xml.GetChildContent("Name");