Added an openssl wrapper, ssl module and smtp module.

lib/pure/smtp.nim

@@ -0,0 +1,176 @@
+#
+#
+#            Nimrod's Runtime Library
+#        (c) Copyright 2010 Dominik Picheta
+#
+#    See the file "copying.txt", included in this
+#    distribution, for details about the copyright.
+#
+
+## This module implements the SMTP client protocol as specified by RFC 5321, 
+## this can be used to send mail to any SMTP Server.
+## 
+## This module also implements the protocol used to format messages, as specified by RFC 2822.
+## 
+## Example gmail use:
+## 
+## 
+## .. code-block:: Nimrod
+##   var msg = createMessage("Hello from Nimrod's SMTP", "Hello!.\n Is this awesome or what?", @["foo@gmail.com"])
+##   var smtp = connect("smtp.gmail.com", 465, True, True)
+##   smtp.auth("username", "password")
+##   smtp.sendmail("username@gmail.com", @["foo@gmail.com"], $msg)
+##   
+
+import sockets, strutils, strtabs, ssl, base64
+
+type
+  TSMTP* = object
+    sock: TSocket
+    sslSock: TSecureSocket
+    ssl: Bool
+    debug: Bool
+  
+  TMessage* = object
+    msgTo: seq[String]
+    msgCc: seq[String]
+    msgSubject: String
+    msgOtherHeaders: PStringTable
+    msgBody: String
+  
+  EInvalidReply* = object of EBase
+  
+proc debugSend(smtp: TSMTP, cmd: String) =
+  if smtp.debug:
+    echo("C:" & cmd)
+  if not smtp.ssl:
+    smtp.sock.send(cmd)
+  else:
+    smtp.sslSock.send(cmd)
+
+proc debugRecv(smtp: TSMTP): String =
+  var line = ""
+  var ret = False
+  if not smtp.ssl:
+    ret = smtp.sock.recvLine(line)
+  else:
+    ret = smtp.sslSock.recvLine(line)
+  if ret:
+    if smtp.debug:
+      echo("S:" & line)
+    return line
+  else:
+    echo("S-Warning: recvLine failed.")
+    return ""
+
+proc quitExcpt(smtp: TSMTP, msg: String) =
+  smtp.debugSend("QUIT")
+  raise newException(EInvalidReply, msg)
+
+proc checkReply(smtp: TSMTP, reply: string) =
+  var line = smtp.debugRecv()
+  if not line.startswith(reply):
+    quitExcpt(smtp, "Expected " & reply & " reply, got: " & line)
+
+proc connect*(address: String, port: int = 25, ssl: bool = False, debug: bool = False): TSMTP =
+  ## Establishes a connection with a SMTP server.
+  ## May fail with EInvalidReply or with a socket errors.
+
+  if not ssl:
+    result.sock = socket()
+    result.sock.connect(address, TPort(port))
+  else:
+    result.ssl = True
+    var certResult: int
+    result.sslSock.connect(address, port, certResult)
+  
+  result.debug = debug
+  
+  result.checkReply("220")
+  result.debugSend("HELO " & address & "\c\L")
+  result.checkReply("250")
+
+proc auth*(smtp: TSMTP, username, password: string) =
+  ## Sends an AUTH command to the server to login as the `username` using `password`.
+  ## May fail with EInvalidReply.
+
+  smtp.debugSend("AUTH LOGIN\c\L")
+  smtp.checkReply("334") # TODO: Check whether it's asking for the "Username:"
+                         # i.e "334 VXNlcm5hbWU6"
+  smtp.debugSend(encode(username) & "\c\L")
+  smtp.checkReply("334") # TODO: Same as above, only "Password:" (I think?)
+  
+  smtp.debugSend(encode(password) & "\c\L")
+  smtp.checkReply("235") # Check whether the authentification was successful.
+
+proc sendmail*(smtp: TSMTP, fromaddr: string, toaddrs: seq[string], msg: string) =
+  ## Sends `msg` from `fromaddr` to `toaddr`. 
+  ## Messages may be formed using ``createMessage`` by converting the TMessage into a string.
+
+  smtp.debugSend("MAIL FROM:<" & fromaddr & ">\c\L")
+  smtp.checkReply("250")
+  for address in items(toaddrs):
+    smtp.debugSend("RCPT TO:<" & address & ">\c\L")
+    smtp.checkReply("250")
+  
+  # Send the message
+  smtp.debugSend("DATA " & "\c\L")
+  smtp.checkReply("354")
+  smtp.debugSend(msg & "\c\L")
+  smtp.debugSend(".\c\L")
+  smtp.checkReply("250")
+  
+  # quit
+  smtp.debugSend("QUIT\c\L")
+
+proc createMessage*(mSubject, mBody: String, mTo, mCc: seq[String],
+                    otherHeaders: openarray[tuple[name, value: String]]): TMessage =
+  ## Creates a new MIME compliant message.
+  result.msgTo = mTo
+  result.msgCc = mCc
+  result.msgSubject = mSubject
+  result.msgBody = mBody
+  result.msgOtherHeaders = newStringTable()
+  for n, v in items(otherHeaders):
+    result.msgOtherHeaders[n] = v
+
+proc createMessage*(mSubject, mBody: String, mTo, mCc: seq[String] = @[]): TMessage =
+  ## Alternate version of the above.
+  result.msgTo = mTo
+  result.msgCc = mCc
+  result.msgSubject = mSubject
+  result.msgBody = mBody
+  result.msgOtherHeaders = newStringTable()
+
+proc `$`*(msg: TMessage): String =
+  result = ""
+  if msg.msgTo.len() > 0:
+    result = "TO: " & msg.msgTo.join(", ") & "\c\L"
+  if msg.msgCc.len() > 0:
+    result.add("CC: " & msg.msgTo.join(", ") & "\c\L")
+  # TODO: Folding? i.e when a line is too long, shorten it...
+  result.add("Subject: " & msg.msgSubject & "\c\L")
+  for key, value in pairs(msg.msgOtherHeaders):
+    result.add(key & ": " & value & "\c\L")
+
+  result.add("\c\L" & msg.msgBody)
+  
+
+when isMainModule:
+  #var msg = createMessage("Test subject!", "Hello, my name is dom96.\n What\'s yours?", @["dominik@localhost"])
+  #echo(msg)
+
+  #var smtp = connect("localhost", 25, False, True)
+  #smtp.sendmail("root@localhost", @["dominik@localhost"], $msg)
+  
+  #echo(decode("a17sm3701420wbe.12"))
+  
+  var msg = createMessage("Hello from Nimrod's SMTP!", "Hello!!!!.\n Is this awesome or what?", @["someone@yahoo.com", "someone@gmail.com"])
+  echo(msg)
+
+  var smtp = connect("smtp.gmail.com", 465, True, True)
+  smtp.auth("someone", "password")
+  smtp.sendmail("someone@gmail.com", @["someone@yahoo.com", "someone@gmail.com"], $msg)
+  
+  
+