Lua

Outlook Send Email using MIME Format

See more Outlook Examples

This example sends an email using MIME format via the Microsoft Graph Outlook 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.

local http = chilkat.Http.new()

-- Use your previously obtained access token here:
-- See the following examples for getting an access token:
--    Get Microsoft Graph OAuth2 Access Token (Azure AD v2.0 Endpoint).
--    Get Microsoft Graph OAuth2 Access Token (Azure AD Endpoint).
--    Refresh Access Token (Azure AD v2.0 Endpoint).
--    Refresh Access Token (Azure AD Endpoint).

local jsonToken = chilkat.JsonObject.new()
local success = jsonToken:load_file("qa_data/tokens/microsoftGraph.json")
if not success then
    print(jsonToken.last_error_text)
    return
end

http.auth_token = jsonToken:string_of("access_token")

-- To send email, we'll POST to the following endpoint:
--
-- POST /users/{id | userPrincipalName}/sendMail
--
-- (The special keyword "me" may be used in place of a principal name.)
--

-- The body of the POST request will contain the MIME source of the email in base64 format.

-- Create a new email object
local email = chilkat.Email.new()
email.subject = "Test Outlook API to Send HTML Email with Attachments"
email.from = "Mary <mary@somewhere.com>"
email:add_to("Joe", "joe@example.com")

-- Add a plain-text alternative body, which will likely never be seen.
-- (It is shown if the receiving email client is incapable of displaying HTML email.)
email:add_plain_text_alternative_body("This is a plain-text alternative body...")

-- Our HTML will include an image, so add the related image here.
local contentIdStarfish = email:add_related_file("qa_data/jpg/starfish.jpg")
if not email.last_method_success then
    print(email.last_error_text)
    return
end

-- The src attribute for the image tag is set to the contentIdStarfish:
local sbHtml = chilkat.StringBuilder.new()
sbHtml:append("<html><body><p>This is an HTML email with an embedded image.</p>")
sbHtml:append("<p><img src=\"cid:CONTENT_ID_STARFISH\" /></p></body></html>")
local numReplacements = sbHtml:replace("CONTENT_ID_STARFISH", contentIdStarfish)

email:add_html_alternative_body(sbHtml:get_as_string())

-- Finally, add some attachments to the email.
-- Add a file attachment.
success = email:add_file_attachment2("qa_data/pdf/fishing.pdf", "application/pdf")
if not success then
    print(email.last_error_text)
    return
end

-- Add an attachment where the content is contained in a string.
local content = "This is the content of the 2nd attached file."
email:add_string_attachment("someText.txt", content)

-- Get the email as multi-line base64..
local bdMime = chilkat.BinData.new()
email:get_mime_bd(bdMime)

-- Now get it as multi-line base64
local sbBase64 = chilkat.StringBuilder.new()
bdMime:get_encoded_sb("base64_mime", sbBase64)

-- Send the HTTP POST (i.e. send the email)
local resp = chilkat.HttpResponse.new()
success = http:http_sb("POST", "https://graph.microsoft.com/v1.0/me/sendMail", sbBase64, "utf-8", "text/plain", resp)
if not success then
    print(http.last_error_text)
    return
end

-- The send succeeded if the response status code = 202.
-- In the success case, there is no response body.  (We just get the response code to know that it succeeded.)
if resp.status_code ~= 202 then
    local json = chilkat.JsonObject.new()
    json:load(resp.body_str)
    json.emit_compact = false
    print(json:emit())
    print("Failed, response status code = " .. resp.status_code)
else
    print("Outlook Mail Sent.")
end