Lua Requires Chilkat v11.0.0+

Upload String to Google Cloud Storage

See more Google Cloud Storage Examples

Demonstrates how to upload an in-memory string to Google Cloud Storage. 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")

-- Send a POST equivalent to this curl command.
-- The content of the file is contained in the request body.

-- curl -X POST --data-binary @[OBJECT] \
--     -H "Authorization: Bearer [OAUTH2_TOKEN]" \
--     -H "Content-Type: [OBJECT_CONTENT_TYPE]" \
--     "https://www.googleapis.com/upload/storage/v1/b/[BUCKET_NAME]/o?uploadType=media&name=[OBJECT_NAME]"

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

-- Create an XML document, and write it to a StringBuilder.
-- We'll be uploading this XML document.
local xml = chilkat.Xml.new()
xml.tag = "note"
xml:update_child_content("to", "Tove")
xml:update_child_content("from", "Jani")
xml:update_child_content("heading", "Reminder")
xml:update_child_content("body", "Don't forget me this weekend!")

-- Write the XML to sbXml.
local sbXml = chilkat.StringBuilder.new()
xml:get_xml_sb(sbXml)

-- sbXml contains this:

-- <note>
--     <to>Tove</to>
--     <from>Jani</from>
--     <heading>Reminder</heading>
--     <body>Don't forget me this weekend!</body>
-- </note>

-- Construct a URL to upload to an object named "test.xml" in the "chilkat-ocean" bucket.
http:set_url_var("bucket_name", "chilkat-ocean")
http:set_url_var("object_name", "test.xml")
local url = "https://www.googleapis.com/upload/storage/v1/b/{$bucket_name}/o?uploadType=media&name={$object_name}"

local resp = chilkat.HttpResponse.new()
local success = http:http_sb("POST", url, sbXml, "utf-8", "application/xml", 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")
print(resp.body_str)

-- A successful response looks like this:
-- Response code: 200
-- Response body
-- {
--  "kind": "storage#object",
--  "id": "chilkat-ocean/test.xml/1502669565429870",
--  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/test.xml",
--  "name": "test.xml",
--  "bucket": "chilkat-ocean",
--  "generation": "1502669565429870",
--  "metageneration": "1",
--  "contentType": "application/xml",
--  "timeCreated": "2017-08-14T00:12:45.379Z",
--  "updated": "2017-08-14T00:12:45.379Z",
--  "storageClass": "MULTI_REGIONAL",
--  "timeStorageClassUpdated": "2017-08-14T00:12:45.379Z",
--  "size": "181",
--  "md5Hash": "TCR0L7TWsw2TzOvfNvgEfA==",
--  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/test.xml?generation=1502669565429870&alt=media",
--  "crc32c": "ZFd5sA==",
--  "etag": "CO6Qpq241dUCEAE="
-- }