Lua

Upload File to Google Cloud Storage

See more Google Cloud Storage Examples

Demonstrates how to upload a file 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"

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

-- 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 = jsonToken:string_of("access_token")

local sbPath = chilkat.StringBuilder.new()
sbPath:append("/upload/storage/v1/b/bucket_name/o?uploadType=media&name=object_name")
local numReplaced = sbPath:replace("bucket_name", "chilkat-bucket-b")
numReplaced = sbPath:replace("object_name", "penguins.jpg")

local req = chilkat.HttpRequest.new()
req.http_verb = "POST"
req.path = sbPath:get_as_string()
req.content_type = "image/jpeg"
-- Indicate the file to be streamed in the request body when the HTTP POST is sent.
req:stream_body_from_file("qa_data/jpg/penguins.jpg")

local resp = chilkat.HttpResponse.new()
success = http:http_sreq("www.googleapis.com", 443, true, req, 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/penguins.jpg/1502643657837855",
--  "selfLink": "https://www.googleapis.com/storage/v1/b/chilkat-ocean/o/penguins.jpg",
--  "name": "penguins.jpg",
--  "bucket": "chilkat-ocean",
--  "generation": "1502643657837855",
--  "metageneration": "1",
--  "contentType": "image/jpeg",
--  "timeCreated": "2017-08-13T17:00:57.811Z",
--  "updated": "2017-08-13T17:00:57.811Z",
--  "storageClass": "MULTI_REGIONAL",
--  "timeStorageClassUpdated": "2017-08-13T17:00:57.811Z",
--  "size": "777835",
--  "md5Hash": "nTd7EM53jEk4s8fixjoimg==",
--  "mediaLink": "https://www.googleapis.com/download/storage/v1/b/chilkat-ocean/o/penguins.jpg?generation=1502643657837855&alt=media",
--  "crc32c": "ixxYVw==",
--  "etag": "CJ+azOvX1NUCEAE="
-- }