Lua Requires Chilkat v9.5.0.89+

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.

Lua

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

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

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

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

local bucketName = "chilkat-test"

local strXml = http:s3_list_bucket_objects(bucketName)
if not http.last_method_success then
    print(http.last_error_text)
    return
end

print("Response status code = " .. http.last_status)

local xml = chilkat.Xml.new()
local success = xml:load_xml(strXml)
if not success then
    print(xml.last_error_text)
    return
end

-- 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 then
    print(xml:get_xml())
    print("Failed.")
    return
end

-- A sample response is shown below.
print(xml:get_xml())
print("----")

-- 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>

local ETag = ""
local Key = ""
local LastModified = ""
local ID = ""
local SizeDecimalStr = ""
local StorageClass = ""

local ListBucketResult_xmlns = xml:get_attr_value("xmlns")
local i = 0
local count_i = xml:num_children_having_tag("Contents")
while i < count_i do
    xml.i = i
    ETag = xml:get_child_content("Contents[i]|ETag")
    Key = xml:get_child_content("Contents[i]|Key")
    LastModified = xml:get_child_content("Contents[i]|LastModified")
    ID = xml:get_child_content("Contents[i]|Owner|ID")
    SizeDecimalStr = xml:get_child_content("Contents[i]|Size")
    StorageClass = xml:get_child_content("Contents[i]|StorageClass")
    i = i + 1
end

local IsTruncated = xml:get_child_content("IsTruncated")
local MaxKeys = xml:get_child_int_value("MaxKeys")
local Name = xml:get_child_content("Name")