mirror of
https://github.com/lunarmodules/luasocket.git
synced 2024-12-25 20:18:21 +01:00
BUG: multi-line replies were not supported.
Error logic simplified.
This commit is contained in:
Diego Nehab
parent
366fb989f3
commit
bd0bf45979
653
src/smtp.lua
653
src/smtp.lua
@ -1,338 +1,315 @@
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-----------------------------------------------------------------------------
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-- Simple SMTP support for the Lua language using the LuaSocket toolkit.
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-- Author: Diego Nehab
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-- Date: 26/12/2000
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-- Conforming to: RFC 821
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Program constants
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-----------------------------------------------------------------------------
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-- timeout in secconds before we give up waiting
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local TIMEOUT = 180
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-- port used for connection
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local PORT = 25
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-- domain used in HELO command. If we are under a CGI, try to get from
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-- environment
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local DOMAIN = getenv("SERVER_NAME")
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if not DOMAIN then
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DOMAIN = "localhost"
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end
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-----------------------------------------------------------------------------
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-- Tries to send DOS mode lines. Closes socket on error.
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-- Input
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-- sock: server socket
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-- line: string to be sent
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-- Returns
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-- err: message in case of error, nil if successfull
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-----------------------------------------------------------------------------
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local puts = function(sock, line)
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local err = sock:send(line .. "\r\n")
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if err then sock:close() end
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return err
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end
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-----------------------------------------------------------------------------
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-- Tries to receive DOS mode lines. Closes socket on error.
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-- Input
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-- sock: server socket
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-- Returns
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-- line: received string if successfull, nil in case of error
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-- err: error message if any
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-----------------------------------------------------------------------------
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local gets = function(sock)
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local line, err = sock:receive("*l")
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if err then
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sock:close()
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return nil, err
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end
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return line
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end
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-----------------------------------------------------------------------------
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-- Gets a reply from the server and close connection if it is wrong
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-- Input
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-- sock: server socket
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-- accept: acceptable errorcodes
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-- Returns
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-- code: server reply code. nil if error
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-- line: complete server reply message or error message
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-----------------------------------------------------------------------------
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local get_reply = function(sock, accept)
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local line, err = %gets(sock)
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if line then
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if type(accept) ~= "table" then accept = {accept} end
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local _,_, code = strfind(line, "^(%d%d%d)")
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if not code then return nil, line end
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code = tonumber(code)
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for i = 1, getn(accept) do
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if code == accept[i] then return code, line end
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end
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sock:close()
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return nil, line
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end
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return nil, err
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end
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-----------------------------------------------------------------------------
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-- Sends a command to the server
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-- Input
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-- sock: server socket
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-- command: command to be sent
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-- param: command parameters if any
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-- Returns
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-- err: error message if any
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-----------------------------------------------------------------------------
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local send_command = function(sock, command, param)
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local line
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if param then line = command .. " " .. param
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else line = command end
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return %puts(sock, line)
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end
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-----------------------------------------------------------------------------
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-- Gets the initial server greeting
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-- Input
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-- sock: server socket
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local get_helo = function(sock)
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return %get_reply(sock, 220)
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end
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-----------------------------------------------------------------------------
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-- Sends initial client greeting
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-- Input
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-- sock: server socket
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_helo = function(sock)
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local err = %send_command(sock, "HELO", %DOMAIN)
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if not err then
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return %get_reply(sock, 250)
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else return nil, err end
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end
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-----------------------------------------------------------------------------
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-- Sends mime headers
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-- Input
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-- sock: server socket
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-- mime: table with mime headers to be sent
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-- Returns
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-- err: error message if any
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-----------------------------------------------------------------------------
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local send_mime = function(sock, mime)
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local err
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mime = mime or {}
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-- send all headers
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for name,value in mime do
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err = sock:send(name .. ": " .. value .. "\r\n")
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if err then
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sock:close()
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return err
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end
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end
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-- end mime part
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err = sock:send("\r\n")
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if err then sock:close() end
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return err
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end
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-----------------------------------------------------------------------------
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-- Sends connection termination command
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-- Input
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-- sock: server socket
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_quit = function(sock)
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local code, answer
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local err = %send_command(sock, "QUIT")
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if not err then
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code, answer = %get_reply(sock, 221)
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sock:close()
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return code, answer
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else return nil, err end
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end
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-----------------------------------------------------------------------------
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-- Sends sender command
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-- Input
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-- sock: server socket
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-- sender: e-mail of sender
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_mail = function(sock, sender)
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local param = format("FROM:<%s>", sender)
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local err = %send_command(sock, "MAIL", param)
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if not err then
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return %get_reply(sock, 250)
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else return nil, err end
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end
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-----------------------------------------------------------------------------
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-- Sends message mime headers and body
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-- Input
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-- sock: server socket
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-- mime: table containing all mime headers to be sent
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-- body: message body
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_data = function (sock, mime, body)
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local err = %send_command(sock, "DATA")
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if not err then
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local code, answer = %get_reply(sock, 354)
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if not code then return nil, answer end
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-- avoid premature end in message body
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body = gsub(body or "", "\n%.", "\n%.%.")
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-- mark end of message body
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body = body .. "\r\n."
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err = %send_mime(sock, mime)
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if err then return nil, err end
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err = %puts(sock, body)
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return %get_reply(sock, 250)
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else return nil, err end
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end
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-----------------------------------------------------------------------------
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-- Sends recipient list command
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-- Input
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-- sock: server socket
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-- rcpt: lua table with recipient list
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_rcpt = function(sock, rcpt)
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local err, code, answer
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if type(rcpt) ~= "table" then rcpt = {rcpt} end
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for i = 1, getn(rcpt) do
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err = %send_command(sock, "RCPT", format("TO:<%s>", rcpt[i]))
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if not err then
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code, answer = %get_reply(sock, {250, 251})
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if not code then return code, answer end
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else return nil, err end
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end
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return code, answer
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end
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-----------------------------------------------------------------------------
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-- Sends verify recipient command
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-- Input
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-- sock: server socket
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-- user: user to be verified
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-- Returns
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-- code: server status code, nil if error
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_vrfy = function (sock, user)
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local err = %send_command(sock, "VRFY", format("<%s>", user))
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if not err then
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return %get_reply(sock, {250, 251})
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else return nil, err end
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end
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-----------------------------------------------------------------------------
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-- Connection oriented mail functions
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-----------------------------------------------------------------------------
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function smtp_connect(server)
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local code, answer
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-- connect to server
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local sock, err = connect(server, %PORT)
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if not sock then return nil, err end
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sock:timeout(%TIMEOUT)
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-- initial server greeting
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code, answer = %get_helo(sock)
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if not code then return nil, answer end
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-- HELO
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code, answer = %send_helo(sock)
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if not code then return nil, answer end
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return sock
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end
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function smtp_send(sock, from, rcpt, mime, body)
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local code, answer
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-- MAIL
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code, answer = %send_mail(sock, from)
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if not code then return nil, answer end
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-- RCPT
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code, answer = %send_rcpt(sock, rcpt)
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if not code then return nil, answer end
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-- DATA
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return %send_data(sock, mime, body)
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end
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function smtp_close(sock)
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-- QUIT
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return %send_quit(sock)
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end
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-----------------------------------------------------------------------------
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-- Main mail function
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-- Input
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-- from: message sender
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-- rcpt: table containing message recipients
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-- mime: table containing mime headers
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-- body: message body
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-- server: smtp server to be used
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-- Returns
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-- nil if successfull, error message in case of error
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-----------------------------------------------------------------------------
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function smtp_mail(from, rcpt, mime, body, server)
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local sock, err = smtp_connect(server)
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if not sock then return err end
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local code, answer = smtp_send(sock, from, rcpt, mime, body)
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if not code then return answer end
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code, answer = smtp_close(sock)
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if not code then return answer
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else return nil end
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end
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--===========================================================================
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-- Compatibility functions
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--===========================================================================
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-----------------------------------------------------------------------------
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-- Converts a comma separated list into a Lua table with one entry for each
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-- list element.
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-- Input
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-- str: string containing the list to be converted
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-- tab: table to be filled with entries
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-- Returns
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-- a table t, where t.n is the number of elements with an entry t[i]
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-- for each element
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-----------------------------------------------------------------------------
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local fill = function(str, tab)
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gsub(str, "([^%s,]+)", function (w) tinsert(%tab, w) end)
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return tab
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end
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-----------------------------------------------------------------------------
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-- Client mail function, implementing CGILUA 3.2 interface
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-----------------------------------------------------------------------------
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function mail(msg)
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local rcpt = {}
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local mime = {}
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mime["Subject"] = msg.subject
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mime["To"] = msg.to
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mime["From"] = msg.from
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%fill(msg.to, rcpt)
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if msg.cc then
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%fill(msg.cc, rcpt)
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mime["Cc"] = msg.cc
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end
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if msg.bcc then
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%fill(msg.bcc, rcpt)
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end
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rcpt.n = nil
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return %smtp_mail(msg.from, rcpt, mime, msg.message, msg.mailserver)
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end
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-----------------------------------------------------------------------------
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-- Simple SMTP support for the Lua language using the LuaSocket toolkit.
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-- Author: Diego Nehab
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-- Date: 26/12/2000
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-- Conforming to: RFC 821
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-----------------------------------------------------------------------------
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-----------------------------------------------------------------------------
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-- Program constants
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-----------------------------------------------------------------------------
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-- timeout in secconds before we give up waiting
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local TIMEOUT = 180
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-- port used for connection
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local PORT = 25
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-- domain used in HELO command. If we are under a CGI, try to get from
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-- environment
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local DOMAIN = getenv("SERVER_NAME")
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if not DOMAIN then
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DOMAIN = "localhost"
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end
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-----------------------------------------------------------------------------
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-- Tries to send DOS mode lines. Closes socket on error.
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-- Input
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-- sock: server socket
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-- line: string to be sent
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-- Returns
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-- err: message in case of error, nil if successfull
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-----------------------------------------------------------------------------
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local try_send = function(sock, line)
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local err = sock:send(line .. "\r\n")
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print(line)
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if err then sock:close() end
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return err
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end
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-----------------------------------------------------------------------------
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-- Gets command reply, (accepts multiple-line replies)
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-- Input
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-- control: control connection socket
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-- Returns
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-- answer: whole server reply, nil if error
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-- code: reply status code or error message
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-----------------------------------------------------------------------------
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local get_answer = function(control)
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local code, lastcode, sep
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local line, err = control:receive()
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local answer = line
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if err then return nil, err end
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print(line)
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_,_, code, sep = strfind(line, "^(%d%d%d)(.)")
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if not code or not sep then return nil, answer end
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if sep == "-" then -- answer is multiline
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repeat
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line, err = control:receive()
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if err then return nil, err end
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print(line)
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_,_, lastcode, sep = strfind(line, "^(%d%d%d)(.)")
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answer = answer .. "\n" .. line
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until code == lastcode and sep == " " -- answer ends with same code
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end
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return answer, tonumber(code)
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end
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-----------------------------------------------------------------------------
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-- Checks if a message reply code is correct. Closes control connection
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-- if not.
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-- Input
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-- control: control connection socket
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-- success: table with successfull reply status code
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-- Returns
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-- code: reply code or nil in case of error
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-- answer: complete server answer or system error message
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-----------------------------------------------------------------------------
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local check_answer = function(control, success)
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local answer, code = %get_answer(control)
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if not answer then
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control:close()
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return nil, code
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end
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if type(success) ~= "table" then success = {success} end
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for i = 1, getn(success) do
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if code == success[i] then
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return code, answer
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end
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end
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control:close()
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return nil, answer
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end
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-----------------------------------------------------------------------------
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-- Sends a command to the server (closes sock on error)
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-- Input
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-- sock: server socket
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-- command: command to be sent
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-- param: command parameters if any
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-- Returns
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-- err: error message if any
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-----------------------------------------------------------------------------
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local send_command = function(sock, command, param)
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local line
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if param then line = command .. " " .. param
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else line = command end
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return %try_send(sock, line)
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end
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-----------------------------------------------------------------------------
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-- Sends initial client greeting
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-- Input
|
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-- sock: server socket
|
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-- Returns
|
||||
-- code: server code if ok, nil if error
|
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-- answer: complete server reply
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-----------------------------------------------------------------------------
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local send_helo = function(sock)
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local err = %send_command(sock, "HELO", %DOMAIN)
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if err then return nil, err end
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return %check_answer(sock, 250)
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end
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-----------------------------------------------------------------------------
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-- Sends mime headers
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-- Input
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-- sock: server socket
|
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-- mime: table with mime headers to be sent
|
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-- Returns
|
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-- err: error message if any
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-----------------------------------------------------------------------------
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local send_mime = function(sock, mime)
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local err
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mime = mime or {}
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-- send all headers
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for name,value in mime do
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err = sock:send(name .. ": " .. value .. "\r\n")
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if err then
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sock:close()
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return err
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end
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end
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-- end mime part
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err = sock:send("\r\n")
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if err then sock:close() end
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return err
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end
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|
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-----------------------------------------------------------------------------
|
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-- Sends connection termination command
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-- Input
|
||||
-- sock: server socket
|
||||
-- Returns
|
||||
-- code: server status code, nil if error
|
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-- answer: complete server reply or error message
|
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-----------------------------------------------------------------------------
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local send_quit = function(sock)
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local err = %send_command(sock, "QUIT")
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if err then return nil, err end
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local code, answer = %check_answer(sock, 221)
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sock:close()
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return code, answer
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end
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|
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-----------------------------------------------------------------------------
|
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-- Sends sender command
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-- Input
|
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-- sock: server socket
|
||||
-- sender: e-mail of sender
|
||||
-- Returns
|
||||
-- code: server status code, nil if error
|
||||
-- answer: complete server reply or error message
|
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-----------------------------------------------------------------------------
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local send_mail = function(sock, sender)
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local param = format("FROM:<%s>", sender)
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local err = %send_command(sock, "MAIL", param)
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if err then return nil, err end
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return %check_answer(sock, 250)
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end
|
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|
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-----------------------------------------------------------------------------
|
||||
-- Sends message mime headers and body
|
||||
-- Input
|
||||
-- sock: server socket
|
||||
-- mime: table containing all mime headers to be sent
|
||||
-- body: message body
|
||||
-- Returns
|
||||
-- code: server status code, nil if error
|
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-- answer: complete server reply or error message
|
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-----------------------------------------------------------------------------
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local send_data = function (sock, mime, body)
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local err = %send_command(sock, "DATA")
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if err then return nil, err end
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local code, answer = %check_answer(sock, 354)
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if not code then return nil, answer end
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-- avoid premature end in message body
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body = gsub(body or "", "\n%.", "\n%.%.")
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-- mark end of message body
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body = body .. "\r\n."
|
||||
err = %send_mime(sock, mime)
|
||||
if err then return nil, err end
|
||||
err = %try_send(sock, body)
|
||||
return %check_answer(sock, 250)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Sends recipient list command
|
||||
-- Input
|
||||
-- sock: server socket
|
||||
-- rcpt: lua table with recipient list
|
||||
-- Returns
|
||||
-- code: server status code, nil if error
|
||||
-- answer: complete server reply
|
||||
-----------------------------------------------------------------------------
|
||||
local send_rcpt = function(sock, rcpt)
|
||||
local err, code, answer
|
||||
if type(rcpt) ~= "table" then rcpt = {rcpt} end
|
||||
for i = 1, getn(rcpt) do
|
||||
err = %send_command(sock, "RCPT", format("TO:<%s>", rcpt[i]))
|
||||
if err then return nil, err end
|
||||
code, answer = %check_answer(sock, {250, 251})
|
||||
if not code then return code, answer end
|
||||
end
|
||||
return code, answer
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Connection oriented mail functions
|
||||
-----------------------------------------------------------------------------
|
||||
function smtp_connect(server)
|
||||
local code, answer
|
||||
-- connect to server
|
||||
local sock, err = connect(server, %PORT)
|
||||
if not sock then return nil, err end
|
||||
sock:timeout(%TIMEOUT)
|
||||
-- initial server greeting
|
||||
code, answer = %check_answer(sock, 220)
|
||||
if not code then return nil, answer end
|
||||
-- HELO
|
||||
code, answer = %send_helo(sock)
|
||||
if not code then return nil, answer end
|
||||
return sock
|
||||
end
|
||||
|
||||
function smtp_send(sock, from, rcpt, mime, body)
|
||||
local code, answer
|
||||
-- MAIL
|
||||
code, answer = %send_mail(sock, from)
|
||||
if not code then return nil, answer end
|
||||
-- RCPT
|
||||
code, answer = %send_rcpt(sock, rcpt)
|
||||
if not code then return nil, answer end
|
||||
-- DATA
|
||||
return %send_data(sock, mime, body)
|
||||
end
|
||||
|
||||
function smtp_close(sock)
|
||||
-- QUIT
|
||||
return %send_quit(sock)
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Main mail function
|
||||
-- Input
|
||||
-- from: message sender
|
||||
-- rcpt: table containing message recipients
|
||||
-- mime: table containing mime headers
|
||||
-- body: message body
|
||||
-- server: smtp server to be used
|
||||
-- Returns
|
||||
-- nil if successfull, error message in case of error
|
||||
-----------------------------------------------------------------------------
|
||||
function smtp_mail(from, rcpt, mime, body, server)
|
||||
local sock, err = smtp_connect(server)
|
||||
if not sock then return err end
|
||||
local code, answer = smtp_send(sock, from, rcpt, mime, body)
|
||||
if not code then return answer end
|
||||
code, answer = smtp_close(sock)
|
||||
if code then return nil end
|
||||
return answer
|
||||
end
|
||||
|
||||
--===========================================================================
|
||||
-- Compatibility functions
|
||||
--===========================================================================
|
||||
-----------------------------------------------------------------------------
|
||||
-- Converts a comma separated list into a Lua table with one entry for each
|
||||
-- list element.
|
||||
-- Input
|
||||
-- str: string containing the list to be converted
|
||||
-- tab: table to be filled with entries
|
||||
-- Returns
|
||||
-- a table t, where t.n is the number of elements with an entry t[i]
|
||||
-- for each element
|
||||
-----------------------------------------------------------------------------
|
||||
local fill = function(str, tab)
|
||||
gsub(str, "([^%s,]+)", function (w) tinsert(%tab, w) end)
|
||||
return tab
|
||||
end
|
||||
|
||||
-----------------------------------------------------------------------------
|
||||
-- Client mail function, implementing CGILUA 3.2 interface
|
||||
-----------------------------------------------------------------------------
|
||||
function mail(msg)
|
||||
local rcpt = {}
|
||||
local mime = {}
|
||||
mime["Subject"] = msg.subject
|
||||
mime["To"] = msg.to
|
||||
mime["From"] = msg.from
|
||||
%fill(msg.to, rcpt)
|
||||
if msg.cc then
|
||||
%fill(msg.cc, rcpt)
|
||||
mime["Cc"] = msg.cc
|
||||
end
|
||||
if msg.bcc then %fill(msg.bcc, rcpt) end
|
||||
rcpt.n = nil
|
||||
return %smtp_mail(msg.from, rcpt, mime, msg.message, msg.mailserver)
|
||||
end
|
||||
|
||||
Loading…
Reference in New Issue
Block a user