E-mail backup file once a month from LM

--Gmail (smtp) username !IMPORTANT!
user = 'yourgmailaddress'
 
--Gmail (smtp) password !IMPORTANT!
password = 'yourpassword'
 
--Sender for e-mail
from = ''
alias_from = 'Sender Name'
 
--Recipient for e-mail
to = ''
alias_to = 'Recipient name'
 
--Subject for e-mail
subjectpart1 = 'Back-up file'
subjectpart2 = 'automaticlly send by LogicMachine'
 
image_description = 'Backup from LogicMachine'
 
--Message on bottom of email (will only be showed when client don't understand attachment)
epilogue = 'End of message'
 
--***********************************************************--
--******************** End of parameters ********************--
--***********************************************************--
--********** DON'T CHANGE ANYTHING UNDER THIS LINE **********--
--***********************************************************--
 
--Create table to include mail settings
local settings = {
    from = from,
    rcpt = to,
    user = user,
    password = password,
    server = 'smtp.gmail.com',
    port = 465,
    secure = 'sslv23',
}
 
--Create attachment
src = '/tmp/lm-backup.tar.gz'
dst = 'LM-' .. os.date('%Y.%m.%d') .. '.tar.gz'
os.execute('sh /lib/genohm-scada/web/general/backup.sh')
 
--Create subject
subject = subjectpart1 .. ": " .. dst .. " " .. subjectpart2
 
--Load required modules to send email with attachment
local smtp = require("socket.smtp")
local mime = require("mime")
local ltn12 = require("ltn12")
 
--Create e-mail header
settings.source = smtp.message{
headers = {
          from = '' .. alias_from .. ' ' .. from .. '',
          to = '' .. alias_to .. ' ' .. to .. '',
          subject = subject
},
 
--Load attachment inside body     
body = {
preamble = "",
 [1] = {  
      headers = {
         ["content-type"] = 'application/x-7z-compressed',
         ["content-disposition"] = 'attachment; filename="'..dst..'"',
         ["content-description"] = '.. dst ..',
         ["content-transfer-encoding"] = "BASE64",
      },
 
      body = ltn12.source.chain(
      ltn12.source.file(io.open(src, "rb")),
      ltn12.filter.chain(
      mime.encode("base64"),
      mime.wrap()
        )
      )
    },
      epilogue = epilogue
  }
}
 
--Send the email
r, e = smtp.send(settings)
 
--Create alert when sending gives an error with error message
if (e) then
  log (e)
  log (r)
  alert("Could not send email: ", e, "\n")
end
 
--Delete created backup file from tmp folder inside LM
os.remove(src)