Lua Requires Chilkat v11.0.0+

Upload In-Memory Binary Data to Google Cloud Storage

See more Google Cloud Storage Examples

Demonstrates how to upload in-memory binary data 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()

-- Download a JPG image from the Internet, and then upload this JPG to
-- a Google Storage bucket.
local jpgUrl = "https://www.chilkatsoft.com/images/starfish.jpg"

local jpgData = chilkat.BinData.new()
local success = http:download_bd(jpgUrl, jpgData)
if not success then
    print(http.last_error_text)
    return
end

http.auth_token = sbToken:get_as_string()

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

local resp = chilkat.HttpResponse.new()
success = http:http_bd("POST", url, jpgData, "image/jpeg", 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/starfish.jpg/1502670320090292",
--  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/starfish.jpg",
--  "name": "starfish.jpg",
--  "bucket": "chilkat-ocean",
--  "generation": "1502670320090292",
--  "metageneration": "1",
--  "contentType": "image/jpeg",
--  "timeCreated": "2017-08-14T00:25:20.040Z",
--  "updated": "2017-08-14T00:25:20.040Z",
--  "storageClass": "MULTI_REGIONAL",
--  "timeStorageClassUpdated": "2017-08-14T00:25:20.040Z",
--  "size": "6229",
--  "md5Hash": "LpxZ2/JmI2fcl9/dqF2gSA==",
--  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/starfish.jpg?generation=1502670320090292&alt=media",
--  "crc32c": "9RjgwQ==",
--  "etag": "CLT5kpW71dUCEAE="
-- }