Lua

Manage Bucket Storage Class

See more Google Cloud Storage Examples

Demonstrates how to manage a bucket's default storage class.

See Cloud Storage Classes for information about storage classes.

Lua

local chilkat = require("chilkat")

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

-- This example uses a previously obtained access token having permission for the
-- scope "https://www.googleapis.com/auth/cloud-platform"

-- In this example, Get Google Cloud Storage OAuth2 Access Token,
-- the service account access token was saved to a text file.  This example fetches the access token from the file..
local sbToken = chilkat.StringBuilder.new()
sbToken:load_file("qa_data/tokens/googleCloudStorageAccessToken.txt", "utf-8")

-- ---- Step 1
-- Create the JSON body of the PUT request that will be sent.

-- {
--   "storageClass": "[STORAGE_CLASS]"
-- }
--

local json = chilkat.JsonObject.new()
-- Be careful if using the "regional" storage class.  See the note below about the 400 error response.
json:update_string("storageClass", "nearline")

-- ---- Step 2
-- Send a PUT equivalent to this curl command

-- curl -X PUT --data-binary @[JSON_FILE_NAME].json \
--     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
--     -H "Content-Type: application/json" \
--     "https://www.googleapis.com/storage/v1/b/[BUCKET_NAME]?fields=storageClass"

local http = chilkat.Http.new()
http.auth_token = sbToken:get_as_string()

http:set_url_var("bucket_name", "chilkat-ocean")
local url = "https://www.googleapis.com/storage/v1/b/{$bucket_name}?fields=storageClass"
local resp = chilkat.HttpResponse.new()
local success = http:http_json("PUT", url, json, "application/json", resp)
if not success then
    print(http.last_error_text)
    return
end

local responseCode = resp.status_code
if responseCode == 401 then
    print(resp.body_str)
    print("If invalid credentials, then it is likely the access token expired.")
    print("Your app should automatically fetch a new access token and re-try.")
    return
end

-- On my first try at running this code, I received the following error response:
-- Response code: 400
-- Response body
-- {
--  "error": {
--   "errors": [
--    {
--     "domain": "global",
--     "reason": "invalid",
--     "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
--    }
--   ],
--   "code": 400,
--   "message": "The combination of locationConstraint and storageClass you provided is not supported for your project"
--  }
-- }
--

-- This was because my storage location was a Multi-regional location, and I tried to assign the "regional" storage class,
-- which is not allowed.

print("Response code: " .. responseCode)
print("Response body")
print(resp.body_str)

-- A response code = 200 indicates success, and the response body contains the JSON
--
-- Response code: 200
-- Response body
-- {
--  "storageClass": "NEARLINE"
-- }
--