Lua

Azure Storage: Lease Container

See more Azure Cloud Storage Examples

Azure Storage Blob Service REST API: Sample code to establishes a lock on a container for delete operations. The lock duration can be 15 to 60 seconds, or can be infinite. Lua

local chilkat = require("chilkat")

-- Azure Blob Service Example: Lease Container
-- See also: https://msdn.microsoft.com/en-us/library/azure/jj159103.aspx

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

local rest = chilkat.Rest.new()

-- Connect to the Azure Storage Blob Service
local bTls = true
local port = 443
local bAutoReconnect = true
-- In this example, the storage account name is "chilkat".
local success = rest:connect("chilkat.blob.core.windows.net", port, bTls, bAutoReconnect)
if not success then
    print(rest.last_error_text)
    return
end

-- Provide Azure Cloud credentials for the REST call.
local azAuth = chilkat.AuthAzureStorage.new()
azAuth.access_key = "AZURE_ACCESS_KEY"
-- The account name used here should match the 1st part of the domain passed in the call to Connect (above).
azAuth.account = "chilkat"
azAuth.scheme = "SharedKey"
azAuth.service = "Blob"
-- This causes the "x-ms-version: 2021-08-06" header to be automatically added.
azAuth.xms_version = "2021-08-06"
success = rest:set_auth_azure_storage(azAuth)

-- Note: The application does not need to explicitly set the following
-- headers: x-ms-date, Authorization.  These headers
-- are automatically set by Chilkat.

-- The lease ID needs to be a GUID.  (UUID and GUID are synonymous)
local crypt = chilkat.Crypt2.new()
local guid = crypt:generate_uuid()
print("Lease ID: " .. guid)
success = rest:add_header("x-ms-lease-id", guid)

-- The action can be "acquire", "renew", "change", "release", or "break".
-- See https://msdn.microsoft.com/en-us/library/azure/jj159103.aspx
success = rest:add_header("x-ms-lease-action", "acquire")

-- The lease duration..
success = rest:add_header("x-ms-lease-duration", "15")

-- In this example, we are acquiring a lease for the container named "mycontainer".
local responseStr = rest:full_request_no_body("PUT", "/mycontainer?restype=container&comp=lease")
if not rest.last_method_success then
    print(rest.last_error_text)
    return
end

-- When successful, the Azure Storage service will respond with a 200, 201, or 202 response status code,
-- with no response body.

-- The status code depends on the operation:
--    Acquire: A successful operation returns status code 201 (Created).
--    Renew: A successful operation returns status code 200 (OK).
--    Change: A successful operation returns status code 200 (OK).
--    Release: A successful operation returns status code 200 (OK).
--    Break: A successful operation returns status code 202 (Accepted).

if (rest.response_status_code < 200) or (rest.response_status_code > 202) then
    -- Examine the request/response to see what happened.
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response body (if any): " .. responseStr)
    print("---")
    print("LastRequestStartLine: " .. rest.last_request_start_line)
    print("LastRequestHeader: " .. rest.last_request_header)
    return
end

print("Success: Lease acquired.")