Rust

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.

Rust

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

let http = chilkat::Http::new();

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

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

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

let bucket_name = "chilkat-test".to_string();

let Ok(str_xml) = http.s3_list_bucket_objects(&bucket_name) else {
    println!("{}", http.last_error_text());
    return;
};

println!("Response status code = {}", http.last_status());

let xml = chilkat::Xml::new();
if xml.load_xml(&str_xml).is_err() {
    println!("{}", xml.last_error_text());
    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.last_status() != 200 {
    println!("{}", xml.get_xml().unwrap_or_default());
    println!("Failed.");
    return;
}

// A sample response is shown below.
println!("{}", xml.get_xml().unwrap_or_default());
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>

let list_bucket_result_xmlns = xml.get_attr_value("xmlns").unwrap_or_default();
let mut i = 0;
let count_i = xml.num_children_having_tag("Contents");
while i < count_i {
    xml.set_i(i);
    let _ = xml.get_child_content("Contents[i]|ETag").unwrap_or_default();
    let _ = xml.get_child_content("Contents[i]|Key").unwrap_or_default();
    let _ = xml.get_child_content("Contents[i]|LastModified").unwrap_or_default();
    let _ = xml.get_child_content("Contents[i]|Owner|ID").unwrap_or_default();
    let _ = xml.get_child_content("Contents[i]|Size").unwrap_or_default();
    let _ = xml.get_child_content("Contents[i]|StorageClass").unwrap_or_default();
    i = i + 1;
}

let is_truncated = xml.get_child_content("IsTruncated").unwrap_or_default();
let max_keys = xml.get_child_int_value("MaxKeys");
let name = xml.get_child_content("Name").unwrap_or_default();