email with attachement gives image size 0

[gjniewenhuijse]

Hello,

I have a script that sends an email with attached foscam camera snaphots when my doorbell is pushed.

That works great for months, but after some time it crashed my lm4 as following:
- when my doorbell is pushed i receive an email with size 0 images. every doorbell push i receive that mail with size 0 image
- so i try to find the problem and test my code manual with a resident script (sleepinterval 60), the same code as my event-based script

Code:

require('user.nit_email')
mail({'test@test.nl'}, 'Test', 'Test message.', 'std_camera_2')

-I receive every 60 seconds an email, thats correct. But when i stop/deactivate this script i also receive every 60 seconds the email, why?
-So i need to restart my lm4 to solve this issue.

Nit_email

Code:

local from_name = 'HomeLynk'

local settings = {
   -- "from" field, only e-mail must be specified here
   from = 'test@test.nl',
   -- smtp username
   --user = '',
   -- smtp password
   --password = '',
   -- smtp server
   server = '1.2.3.4',
   -- smtp server port
   port = 25,
   -- enable ssl, required for gmail smtp
   --secure = 'sslv23',
 }

local escape = function(v)
 return '<' .. tostring(v) .. '>'
end

-- send an e-mail,
function mail(to, subject, message, att)
 -- make sure these settings are correct
 local smtp = require('socket.smtp')
 if att then
   local mime = require('mime')
        local ltn12 = require('ltn12')
   -- generate attachements
   bodyAtt = handleAtt(att, 'start')
 else
   bodyAtt = {"",""}
 end
 
 if type(to) ~= 'table' then
   to = { to }
 end
 
 for index, email in ipairs(to) do
   to[ index ] = escape(email)
 end
    
 settings.source = smtp.message({
   headers = {
     from = from_name..escape(settings.from),
     to = table.concat(to, ', '),
     subject = subject,
   },
   body = {
       --preamble = "Hello Recipient, \r\n" .. "This is your e-mail with a picture attached.",
       {
         header = {
           ['Content-type'] = 'text/html; charset=utf-8',
         },
         body = mime.eol(0, message),
       },
       bodyAtt[1],bodyAtt[2], -- get attachements if exists (max 2 for now)  <---todo:make it dynamic
       --epilogue = "That's it folks! :)"
   }
 })
 bodyAtt = nil
 
 -- fixup from field
 settings.from = escape(settings.from)
 settings.rcpt = to

 smtp.send(settings)
 if att then
   handleAtt(att, 'end')
 end
end

-- std_camera: snapshot camera voordeur
-- std_camera_b: snapshot camera voordeur en achterdeur
function handleAtt(att, handle)
 if handle == "start" then
   if att == "std_camera" then
     require('user.nit_camera')
     dst = '/tmp/capture.jpg'
     local url = string.format(url_cmdFoscam, cam_voordeur, cam_port, 'snapPicture2', '', cam_usr2, cam_pwd2)
            local cmd = string.format('wget -O %q %q', dst, url)
            os.execute(cmd)
     local attachment = ltn12.source.chain( ltn12.source.file(io.open(dst, 'r')), ltn12.filter.chain(mime.encode('base64'), mime.wrap()) )
     return
     {
       {
         headers = {
           ['Content-type'] = 'image/jpeg; name="image.jpg"',
           ['Content-disposition'] = 'attachment; filename="image.jpg"',
           ['Content-transfer-encoding'] = 'BASE64',
         },
         body = attachment
       }
            }
   
   elseif att == "std_camera_b" then
     require('user.nit_camera')
     dst1 = '/tmp/capture1.jpg'
     dst2 = '/tmp/capture2.jpg'
     local url1 = string.format(url_cmdFoscam, cam_voordeur, cam_port, 'snapPicture2', '', cam_usr2, cam_pwd2)
     local url2 = string.format(url_cmdFoscam, cam_achterdeur, cam_port, 'snapPicture2', '', cam_usr2, cam_pwd2)
            local cmd1 = string.format('wget -O %q %q', dst1, url1)
            local cmd2 = string.format('wget -O %q %q', dst2, url2)
     os.execute(cmd1)
            os.execute(cmd2)
     local attachment1 = ltn12.source.chain( ltn12.source.file(io.open(dst1, 'r')), ltn12.filter.chain(mime.encode('base64'), mime.wrap()) )
     local attachment2 = ltn12.source.chain( ltn12.source.file(io.open(dst2, 'r')), ltn12.filter.chain(mime.encode('base64'), mime.wrap()) )
     return
     {
       {
         headers = {
           ['Content-type'] = 'image/jpeg; name="image1.jpg"',
           ['Content-disposition'] = 'attachment; filename="image1.jpg"',
           ['Content-transfer-encoding'] = 'BASE64',
         },
         body = attachment1
       },
       {
         headers = {
           ['Content-type'] = 'image/jpeg; name="image2.jpg"',
           ['Content-disposition'] = 'attachment; filename="image2.jpg"',
           ['Content-transfer-encoding'] = 'BASE64',
         },
         body = attachment2
       }
     }
   
   elseif att == "std_camera_2" then
     require('user.nit_camera')
     dst1 = '/tmp/capture1.jpg'
     dst2 = '/tmp/capture2.jpg'
     local url1 = string.format(url_cmdFoscam, cam_voordeur, cam_port, 'snapPicture2', '', cam_usr2, cam_pwd2)
            local cmd1 = string.format('wget -O %q %q', dst1, url1)
            local cmd2 = string.format('wget -O %q %q', dst2, url1)
     os.execute(cmd1) -- direct snapshot
     cmdFoscam(cam_voordeur, cam_port, 'ptzGotoPresetPoint', '&name=Deur') -- move to frontdoor
            os.sleep(20) -- wait for 20 seconds
     os.execute(cmd2) -- new snapshot
     local attachment1 = ltn12.source.chain( ltn12.source.file(io.open(dst1, 'r')), ltn12.filter.chain(mime.encode('base64'), mime.wrap()) )
     local attachment2 = ltn12.source.chain( ltn12.source.file(io.open(dst2, 'r')), ltn12.filter.chain(mime.encode('base64'), mime.wrap()) )
     return
     {
       {
         headers = {
           ['Content-type'] = 'image/jpeg; name="image1.jpg"',
           ['Content-disposition'] = 'attachment; filename="image1.jpg"',
           ['Content-transfer-encoding'] = 'BASE64',
         },
         body = attachment1
       },
       {
         headers = {
           ['Content-type'] = 'image/jpeg; name="image2.jpg"',
           ['Content-disposition'] = 'attachment; filename="image2.jpg"',
           ['Content-transfer-encoding'] = 'BASE64',
         },
         body = attachment2
       }
     }
   end
 
 elseif handle == "end" then
   if att == "std_camera" then
     os.remove(dst)
   elseif att == "std_camera_b" then
     os.remove(dst1)
     os.remove(dst2)
   elseif att == "std_camera_2" then
     os.remove(dst1)
     os.remove(dst2)
   end
 end
 
end

Nit_camera

Code:

-- snapshot urls
cam_voordeur = '2.2.2.2'
cam_achterdeur = '2.2.2.3'
cam_port = 80
cam_usr = 'user'
cam_pwd = 'password'
cam_usr2 = 'user2'
cam_pwd2 = 'password2'

-- start command urls
url_cmdFoscam = 'http://%s:%s/cgi-bin/CGIProxy.fcgi?cmd=%s%s&usr=%s&pwd=%s'

-- Foscam camera command
function cmdFoscam(iCamera, iPort, iCmd, iParam)
 local url, response
 url = string.format(url_cmdFoscam, iCamera, iPort, iCmd, iParam, cam_usr, cam_pwd)
      
 if (url) then
     require('socket.http')
   socket.http.TIMEOUT = 5
   response = socket.http.request( url_encode(url) )
 end
 return response
end