Lua

SendGrid -- Send Email with Attachment

See more SendGrid Examples

Sends an email with an attachment. Lua

local chilkat = require("chilkat")

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

local http = chilkat.Http.new()

-- Implements the following CURL command:

-- curl --request POST \
--   --url https://api.sendgrid.com/v3/mail/send \
--   --header 'authorization: Bearer YOUR_API_KEY' \
--   --header 'Content-Type: application/json' \
--   --data '{"personalizations": [{"to": [{"email": "recipient@example.com"}]}],"from": {"email": "sender@example.com"},"subject":"Hello, World!","content": [{"type": "text/html","value": "Hey,<br>Please find attachment."}], "attachments": [{"content": "BASE64_ENCODED_CONTENT", "type": "text/plain", "filename": "attachment.txt"}]}'

-- Use the following online tool to generate HTTP code from a CURL command
-- Convert a cURL Command to HTTP Source Code

-- Use this online tool to generate code from sample JSON:
-- Generate Code to Create JSON

-- The following JSON is sent in the request body.

-- {
--   "personalizations": [
--     {
--       "to": [
--         {
--           "email": "recipient@example.com"
--         }
--       ]
--     }
--   ],
--   "from": {
--     "email": "sender@example.com"
--   },
--   "subject": "Hello, World!",
--   "content": [
--     {
--       "type": "text/html",
--       "value": "Hey,<br>Please find attachment."
--     }
--   ],
--   "attachments": [
--     {
--       "content": "BASE64_ENCODED_CONTENT",
--       "type": "text/plain",
--       "filename": "attachment.txt"
--     }
--   ]
-- }

local json = chilkat.JsonObject.new()
json:update_string("personalizations[0].to[0].email", "recipient@example.com")
json:update_string("from.email", "sender@example.com")
json:update_string("subject", "Hello, World!")
json:update_string("content[0].type", "text/html")
json:update_string("content[0].value", "Hey,<br>Please find attachment.")

-- Load a file to be attached.
local bd = chilkat.BinData.new()
local success = bd:load_file("qa_data/pdf/hello.pdf")

json:update_string("attachments[0].content", bd:get_encoded("base64"))
json:update_string("attachments[0].type", "application/pdf")
json:update_string("attachments[0].filename", "hello.pdf")

-- Adds the "Authorization: Bearer YOUR_API_KEY" header.
http.auth_token = "YOUR_API_KEY"

local resp = chilkat.HttpResponse.new()
success = http:http_json("POST", "https://api.sendgrid.com/v3/mail/send", json, "application/json", resp)
if not success then
    print(http.last_error_text)
    return
end

local respStatusCode = resp.status_code
print("Response Status Code = " .. respStatusCode)
if respStatusCode ~= 202 then
    print("Response Header:")
    print(resp.header)
    print("Response Body:")
    print(resp.body_str)
    print("Failed.")
    return
end

print("Success.")