1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
|
-- original file : smtp.lua
-- for more into : see util-soc.lua
local type, setmetatable, next = type, setmetatable, next
local find, lower, format = string.find, string.lower, string.format
local osdate, osgetenv = os.date, os.getenv
local random = math.random
local socket = socket or require("socket")
local headers = socket.headers or require("socket.headers")
local ltn12 = ltn12 or require("ltn12")
local tp = socket.tp or require("socket.tp")
local mime = mime or require("mime")
local mimeb64 = mime.b64
local mimestuff = mime.stuff
local skipsocket = socket.skip
local trysocket = socket.try
local newtrysocket = socket.newtry
local protectsocket = socket.protect
local normalizeheaders = headers.normalize
local lowerheaders = headers.lower
local createcoroutine = coroutine.create
local resumecoroutine = coroutine.resume
local yieldcoroutine = coroutine.resume
local smtp = {
TIMEOUT = 60,
SERVER = "localhost",
PORT = 25,
DOMAIN = osgetenv("SERVER_NAME") or "localhost",
ZONE = "-0000",
}
socket.smtp = smtp
local methods = { }
local mt = { __index = methods }
function methods.greet(self, domain)
local try = self.try
local tp = self.tp
try(tp:check("2.."))
try(tp:command("EHLO", domain or _M.DOMAIN))
return skipsocket(1, try(tp:check("2..")))
end
function methods.mail(self, from)
local try = self.try
local tp = self.tp
try(tp:command("MAIL", "FROM:" .. from))
return try(tp:check("2.."))
end
function methods.rcpt(self, to)
local try = self.try
local tp = self.tp
try(tp:command("RCPT", "TO:" .. to))
return try(tp:check("2.."))
end
function methods.data(self, src, step)
local try = self.try
local tp = self.tp
try(tp:command("DATA"))
try(tp:check("3.."))
try(tp:source(src, step))
try(tp:send("\r\n.\r\n"))
return try(tp:check("2.."))
end
function methods.quit(self)
local try = self.try
local tp = self.tp
try(tp:command("QUIT"))
return try(tp:check("2.."))
end
function methods.close(self)
return self.tp:close()
end
function methods.login(self, user, password)
local try = self.try
local tp = self.tp
try(tp:command("AUTH", "LOGIN"))
try(tp:check("3.."))
try(tp:send(mimeb64(user) .. "\r\n"))
try(tp:check("3.."))
try(tp:send(mimeb64(password) .. "\r\n"))
return try(tp:check("2.."))
end
function methods.plain(self, user, password)
local try = self.try
local tp = self.tp
local auth = "PLAIN " .. mimeb64("\0" .. user .. "\0" .. password)
try(tp:command("AUTH", auth))
return try(tp:check("2.."))
end
function methods.auth(self, user, password, ext)
if not user or not password then
return 1
end
local try = self.try
if find(ext, "AUTH[^\n]+LOGIN") then
return self:login(user,password)
elseif find(ext, "AUTH[^\n]+PLAIN") then
return self:plain(user,password)
else
try(nil, "authentication not supported")
end
end
function methods.send(self, mail)
self:mail(mail.from)
local receipt = mail.rcpt
if type(receipt) == "table" then
for i=1,#receipt do
self:rcpt(receipt[i])
end
elseif receipt then
self:rcpt(receipt)
end
self:data(ltn12.source.chain(mail.source, mimestuff()), mail.step)
end
local function opensmtp(self, server, port, create)
if not server or server == "" then
server = smtp.SERVER
end
if not port or port == "" then
port = smtp.PORT
end
local s = {
tp = trysocket(tp.connect(server, port, smtp.TIMEOUT, create)),
try = newtrysocket(function()
s:close()
end),
}
setmetatable(s, mt)
return s
end
smtp.open = opensmtp
local nofboundaries = 0
local function newboundary()
nofboundaries = nofboundaries + 1
return format('%s%05d==%05u', osdate('%d%m%Y%H%M%S'), random(0,99999), nofboundaries)
end
local send_message
local function send_headers(headers)
yieldcoroutine(normalizeheaders(headers))
end
local function send_multipart(message)
local boundary = newboundary()
local headers = lowerheaders(message.headers)
local body = message.body
local preamble = body.preamble
local epilogue = body.epilogue
local content = headers['content-type'] or 'multipart/mixed'
headers['content-type'] = content .. '; boundary="' .. boundary .. '"'
send_headers(headers)
if preamble then
yieldcoroutine(preamble)
yieldcoroutine("\r\n")
end
for i=1,#body do
yieldcoroutine("\r\n--" .. boundary .. "\r\n")
send_message(body[i])
end
yieldcoroutine("\r\n--" .. boundary .. "--\r\n\r\n")
if epilogue then
yieldcoroutine(epilogue)
yieldcoroutine("\r\n")
end
end
local default_content_type = 'text/plain; charset="UTF-8"'
local function send_source(message)
local headers = lowerheaders(message.headers)
if not headers['content-type'] then
headers['content-type'] = default_content_type
end
send_headers(headers)
local getchunk = message.body
while true do
local chunk, err = getchunk()
if err then
yieldcoroutine(nil, err)
elseif chunk then
yieldcoroutine(chunk)
else
break
end
end
end
local function send_string(message)
local headers = lowerheaders(message.headers)
if not headers['content-type'] then
headers['content-type'] = default_content_type
end
send_headers(headers)
yieldcoroutine(message.body)
end
function send_message(message)
local body = message.body
if type(body) == "table" then
send_multipart(message)
elseif type(body) == "function" then
send_source(message)
else
send_string(message)
end
end
local function adjust_headers(message)
local headers = lowerheaders(message.headers)
if not headers["date"] then
headers["date"] = osdate("!%a, %d %b %Y %H:%M:%S ") .. (message.zone or smtp.ZONE)
end
if not headers["x-mailer"] then
headers["x-mailer"] = socket._VERSION
end
headers["mime-version"] = "1.0"
return headers
end
function smtp.message(message)
message.headers = adjust_headers(message)
local action = createcoroutine(function()
send_message(message)
end)
return function()
local ret, a, b = resumecoroutine(action)
if ret then
return a, b
else
return nil, a
end
end
end
smtp.send = protectsocket(function(mail)
local snd = opensmtp(smtp,mail.server, mail.port, mail.create)
local ext = snd:greet(mail.domain)
snd:auth(mail.user, mail.password, ext)
snd:send(mail)
snd:quit()
return snd:close()
end)
package.loaded["socket.smtp"] = smtp
return smtp
|