Lua

Google Cloud Storage List Buckets

See more Google Cloud Storage Examples

Demonstrates how to retrieve a list of buckets for a given project. 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"

local jsonToken = chilkat.JsonObject.new()
local success = jsonToken:load_file("qa_data/tokens/googleCloudStorage.json")
if not success then
    print(jsonToken.last_error_text)
    return
end

local http = chilkat.Http.new()
http.auth_token = jsonToken:string_of("access_token")

-- For more info see Cloud Storage Documentation - Buckets: list 
--
success = http:set_url_var("PROJECT_ID", "chilkattest-1050")
local resp = chilkat.HttpResponse.new()
success = http:http_no_body("GET", "https://www.googleapis.com/storage/v1/b?project={$PROJECT_ID}", 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

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

local json = chilkat.JsonObject.new()
success = json:load(resp.body_str)

json.emit_compact = false

print(json:emit())

-- A response code = 200 indicates success, and the response body contains JSON such as this:

-- {
--   "kind": "storage#buckets",
--   "items": [
--     {
--       "kind": "storage#bucket",
--       "id": "chilkat-bucket",
--       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-bucket",
--       "projectNumber": "5332332985",
--       "name": "chilkat-bucket",
--       "timeCreated": "2018-10-23T00:04:44.507Z",
--       "updated": "2018-10-23T00:04:44.507Z",
--       "metageneration": "1",
--       "iamConfiguration": {
--         "bucketPolicyOnly": {
--           "enabled": false
--         }
--       },
--       "location": "US",
--       "storageClass": "MULTI_REGIONAL",
--       "etag": "CAE="
--     },
--     {
--       "kind": "storage#bucket",
--       "id": "chilkat-images",
--       "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-images",
--       "projectNumber": "5332332985",
--       "name": "chilkat-images",
--       "timeCreated": "2018-10-23T11:24:43.000Z",
--       "updated": "2018-10-23T11:24:43.000Z",
--       "metageneration": "1",
--       "iamConfiguration": {
--         "bucketPolicyOnly": {
--           "enabled": false
--         }
--       },
--       "location": "US",
--       "storageClass": "MULTI_REGIONAL",
--       "etag": "CAE="
--     }
--   ]
-- }

-- Use this online tool to generate parsing code from sample JSON:
-- Generate Parsing Code from JSON

local id = ""
local selfLink = ""
local projectNumber = ""
local name = ""
local timeCreated = ""
local updated = ""
local metageneration = ""
local iamConfigurationBucketPolicyOnlyEnabled = false
local location = ""
local storageClass = ""
local etag = ""

local kind = json:string_of("kind")
local i = 0
local count_i = json:size_of_array("items")
while i < count_i do
    json.i = i
    kind = json:string_of("items[i].kind")
    id = json:string_of("items[i].id")
    selfLink = json:string_of("items[i].selfLink")
    projectNumber = json:string_of("items[i].projectNumber")
    name = json:string_of("items[i].name")
    timeCreated = json:string_of("items[i].timeCreated")
    updated = json:string_of("items[i].updated")
    metageneration = json:string_of("items[i].metageneration")
    iamConfigurationBucketPolicyOnlyEnabled = json:bool_of("items[i].iamConfiguration.bucketPolicyOnly.enabled")
    location = json:string_of("items[i].location")
    storageClass = json:string_of("items[i].storageClass")
    etag = json:string_of("items[i].etag")
    i = i + 1
end