Lua Requires Chilkat v9.5.0.68+
Outlook Send Email with Attachments

This example sends a plain-text email with attachments. Other examples exist for:
Sending plain-text email.
Sending HTML email.
Sending HTML email with embedded images.
Sending HTML email with embedded images and attachments.
Chilkat Lua Downloads

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).

http.auth_token = "MICROSOFT_GRAPH_ACCESS_TOKEN"

-- To send mail, 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.)
--

-- Load the files to be attached.
local attach1 = chilkat.BinData.new()
attach1:load_file("qa_data/pdf/fishing.pdf")
local attach2 = chilkat.BinData.new()
attach2:load_file("qa_data/msword/sample.docx")

-- The body of the POST request contains JSON that specifies the email subject, body,
-- recipients, etc.  This example will build the following JSON plain-text email:
--

--     {
--       "message": {
--         "subject": "Sample Email with Attachments",
--         "body": {
--           "contentType": "Text",
--           "content": "This is the plain-text body..."
--         },
--         "toRecipients": [
--           {
--             "emailAddress": {
--           "name": "Chilkat Software",
--               "address": "admin@chilkat.io"
--             }
--           },
--           {
--             "emailAddress": {
--               "address": "chilkat.support@gmail.com"
--             }
--           }
--         ],
--         "ccRecipients": [
--           {
--             "emailAddress": {
--           "name": "Chilkat Blog",
--           "address": "admin@cknotes.com"
--             }
--           }
--         ],
--         "attachments": [
--            {
--              "@odata.type": "#microsoft.graph.fileAttachment",
--              "name": "fishing.pdf",
--              "contentType": "application/pdf",
--              "size": <theActualSize>,
--              "isInline": false,
--              "contentBytes": "base64_data_here"
--            },
--            {
--              "@odata.type": "#microsoft.graph.fileAttachment",
--              "name": "sample.docx",
--              "contentType": "application/vnd.openxmlformats-officedocument.wordprocessingml.document",
--              "size": <theActualSize>,
--              "isInline": false,
--              "contentBytes": "base64_data_here"
--            }
--         ]
--       },
--       "saveToSentItems": true
--     }
--
-- Build the above JSON.
local json = chilkat.JsonObject.new()
json:update_string("message.subject", "Sample Email with Attachments")
json:update_string("message.body.contentType", "Text")
json:update_string("message.body.content", "This is the plain-text body...")

json:update_string("message.toRecipients[0].emailAddress.name", "Chilkat Software")
json:update_string("message.toRecipients[0].emailAddress.address", "admin@chilkat.io")
json:update_string("message.toRecipients[1].emailAddress.address", "chilkat.support@gmail.com")
json:update_string("message.ccRecipients[0].emailAddress.name", "Chilkat Blog")
json:update_string("message.ccRecipients[0].emailAddress.address", "admin@cknotes.com")

json:update_string("message.attachments[0].\"@odata.type\"", "#microsoft.graph.fileAttachment")
json:update_string("message.attachments[0].name", "fishing.pdf")
json:update_string("message.attachments[0].contentType", "application/pdf")
json:update_int("message.attachments[0].size", attach1.num_bytes)
json:update_bool("message.attachments[0].isInline", false)
json:update_bd("message.attachments[0].contentBytes", "base64", attach1)

json:update_string("message.attachments[1].\"@odata.type\"", "#microsoft.graph.fileAttachment")
json:update_string("message.attachments[1].name", "sample.docx")
json:update_string("message.attachments[1].contentType", "application/vnd.openxmlformats-officedocument.wordprocessingml.document")
json:update_int("message.attachments[1].size", attach2.num_bytes)
json:update_bool("message.attachments[1].isInline", false)
json:update_bd("message.attachments[1].contentBytes", "base64", attach2)

json:update_bool("saveToSentItems", true)

-- Send the HTTP POST (i.e. send the HTML email)
local resp = chilkat.HttpResponse.new()
local success = http:http_json("POST", "https://graph.microsoft.com/v1.0/me/sendMail", json, "application/json", 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
    json:load(resp.body_str)
    json.emit_compact = false
    print(json:emit())
    print("Failed, response status code = " .. resp.status_code)
else
    print("Outlook Mail with Attachments Sent.")
end