Lua

Google Drive Insert Permission

See more Google Drive Examples

This example demonstrates how to insert a permission for a file (see https://developers.google.com/drive/v2/reference/permissions/insert)

The impetus for creating this example was a need to be able to view files uploaded using a service account key in the Google Drive web interface. When using a service account access token, the files your application will see are those for the service account, and not the files for your main account. For example, the Google Account I use for testing has a username of "support@chilkatcloud.com". (Don't send email to support@chilkatcloud.com, it's just use for testing and not interactively read.) I use "support@chilkatcloud.com" when I log into Google interactively to view files in Google Drive at https://drive.google.com/drive/my-drive.

The files I upload to Google Drive using a service account key won't be visible in the browser UI. To make them visible, you need to insert a permission for the file so that the main user account, which in this case is "support@chilkatcloud.com", is a reader. After the permission is inserted, the file will be visible under "Shared with me" -- as if another Google Drive account shared the file with you.

Lua

local chilkat = require("chilkat")

local success = true

-- It 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
-- Google Drive scope.

local gAuth = chilkat.AuthGoogle.new()
gAuth.access_token = "GOOGLE-DRIVE-ACCESS-TOKEN"

local rest = chilkat.Rest.new()

-- Connect using TLS.
local bAutoReconnect = true
success = rest:connect("www.googleapis.com", 443, true, bAutoReconnect)

-- Provide the authentication credentials (i.e. the access token)
rest:set_auth_google(gAuth)

rest:add_header("Content-Type", "application/json; charset=UTF-8")

local json = chilkat.JsonObject.new()
json:append_string("role", "reader")
json:append_string("type", "user")
json:append_string("value", "support@chilkatcloud.com")

-- A note from a Chilkat customer:
--
--   My coding attempt was frustrated because I tried a role of "owner".
--   Even when providing the extra parameter of ...?transferOwnership=true
--   that approach fails (400, Bad Request).
--

-- This example is inserting a permission for the file whose fileId is "0By-hrxCCDzSQUGxJY0hzNUFpNmc".
local jsonResponse = rest:full_request_string("POST", "/drive/v2/files/0By-hrxCCDzSQUGxJY0hzNUFpNmc/permissions", json:emit())
if not rest.last_method_success then
    print(rest.last_error_text)
    return
end

-- A successful response will have a status code equal to 200.
if rest.response_status_code ~= 200 then
    print("response status code = " .. rest.response_status_code)
    print("response status text = " .. rest.response_status_text)
    print("response header: " .. rest.response_header)
    print("response JSON: " .. jsonResponse)
    return
end

-- Show the JSON response.
json:load(jsonResponse)

-- Show the full JSON response.
json.emit_compact = false
print(json:emit())

print("Success.")