Lua

Send GMail using REST API

See more GMail REST API Examples

Demonstrates how to send an email using the GMail REST API. Lua

local chilkat = require("chilkat")

-- This example requires the Chilkat API to have been previously unlocked.
-- See Global Unlock Sample for sample code.

-- Use the Chilkat Email API to create or load an email.
local email = chilkat.Email.new()

-- The From name/address don't need to be specified.
-- GMail will automatically use your Gmail address if the following 2 lines are omitted.
email.from_name = "My Name"
email.from_address = "my_account_name@gmail.com"

email:add_to("John Smith", "somebody@somewhere.com")
-- To add more recipients, make additional calls to AddTo or AddCC, one per recipient...

email.subject = "This is a test GMail email created using Chilkat."
email.charset = "utf-8"
email:add_plain_text_alternative_body("This is a test")

-- Create an HTML email body with an embedded image.
local cid = email:add_related_file("qa_data/jpg/starfish.jpg")
local sbHtml = chilkat.StringBuilder.new()
sbHtml:append("<html><body>This is a <b>test</b><br><img src=\"cid:STARFISH_CID\"/></body></html>")
local numReplacements = sbHtml:replace("STARFISH_CID", cid)

email:add_html_alternative_body(sbHtml:get_as_string())

-- OK.. we now have an HTML email with an embedded JPG image
-- We'll need to get the full MIME of the email encoded to a base64url string.
local sbMime = chilkat.StringBuilder.new()
email:get_mime_sb(sbMime)
sbMime:encode("base64url", "utf-8")

-- The body of the HTTP request will be JSON..
local json = chilkat.JsonObject.new()
json:update_sb("raw", sbMime)

-- Send the email...
local http = chilkat.Http.new()
http.auth_token = "GMAIL-ACCESS-TOKEN"

local url = "https://www.googleapis.com/gmail/v1/users/me/messages/send"
local resp = chilkat.HttpResponse.new()
local success = http:http_json("POST", url, json, "application/json", resp)
if not success then
    print(http.last_error_text)
    return
end

-- A status code of 200 indicates success.
print("Response status code: " .. resp.status_code)
print("Response body:")
print(resp.body_str)

-- The response body contains JSON.
-- Use the online tool at Generate JSON Parsing Code
-- to generate JSON parsing code.

-- A sample successful JSON response:

-- {
--  "id": "166f0d4ac39e50bf",
--  "threadId": "166f0d4ac39e50bf",
--  "labelIds": [
--   "SENT"
--  ]
-- }