DZone Snippets: smtp code

Ruby SMTP Server - Save to Database

markpercival (Mark Percival) — Tue, 19 Feb 2008 07:56:06 GMT

This was something I've searched for in the past but have yet to find. It's a super simple server and I'm sure there's a few bugs left in it, but the idea is simple and in my opinion, necessary. It's easy to send email from websites, but receiving it still seems dubious.

I've simply used Peter's(http://snippets.dzone.com/user/peter) ultra simplistic SMTP server and routed the email to a database table called "Emails" via ActiveRecord. It's running GServer so it should be able to handle a decent load. Like I mentioned earlier, it's probably still got some bugs, but it's a decent start.



require 'gserver'

require 'rubygems'  

require 'active_record'  

require 'yaml'

   

dbconfig = YAML::load_file(File.dirname(__FILE__) + '/config/database.yml')

ActiveRecord::Base.establish_connection(dbconfig['development']) 



class Email < ActiveRecord::Base   

end 



class SMTPServer < GServer

  def serve(io)

    @data_mode = false

    @email_message = ""

    puts "Connected"

    io.print "220 hello\r\n"

    loop do

      if IO.select([io], nil, nil, 0.1)

	      data = io.readpartial(4096)

	      puts ">>" + data

	      @email_message << data

	      ok, op = process_line(data)

	      break unless ok

	      puts "<<" + op

	      io.print op

      end

      break if io.closed?

    end

    db_insert(@email_message)

    io.print "221 bye\r\n"

    io.close

  end



  def process_line(line)

    if (@data_mode) && (line.chomp =~ /^\.$/)

      @data_mode = false

      return true, "220 OK\r\n"

    elsif @data_mode

      return true, ""

    elsif (line =~ /^(HELO|EHLO)/)

      return true, "220 and..?\r\n"

    elsif (line =~ /^QUIT/)

      return false, "bye\r\n"

    elsif (line =~ /^MAIL FROM\:/)

      return true, "220 OK\r\n"

    elsif (line =~ /^RCPT TO\:/)

      return true, "220 OK\r\n"

    elsif (line =~ /^DATA/)

      @data_mode = true

      return true, "354 Enter message, ending with \".\" on a line by itself\r\n"

    else

      return true, "500 ERROR\r\n"

    end

  end

  

  def db_insert(email)

    mail_from = (/^MAIL FROM\:<(.+)>.*$/).match(email)[1]

    rcpt_to = (/^RCPT TO\:<(.+)>.*$/).match(email)[1]

    subject = (/^Subject\: (.+)$/).match(email)[1]

    Email.create(:mail_from => mail_from, :rcpt_to => rcpt_to, :subject => subject, :email => email)

  end

  

end



a = SMTPServer.new(25)

a.start

a.join

Ultra-simplistic Ruby SMTP server

peter (Peter Cooperx) — Sun, 29 Apr 2007 05:52:52 GMT

You'll know if you need this, otherwise steer clear ;-)

require 'gserver'



class SMTPServer < GServer

  def serve(io)

    @data_mode = false

    puts "Connected"

    io.print "220 hello\r\n"

    loop do

      if IO.select([io], nil, nil, 0.1)

	      data = io.readpartial(4096)

	      puts ">>" + data

	      ok, op = process_line(data)

	      break unless ok

	      io.print op

      end

      break if io.closed?

    end

    io.print "221 bye\r\n"

    io.close

  end



  def process_line(line)

    if (line =~ /^(HELO|EHLO)/)

      return true, "220 and..?\r\n"

    end

    if (line =~ /^QUIT/)

      return false, "bye\r\n"

    end

    if (line =~ /^MAIL FROM\:/)

      return true, "220 OK\r\n"

    end

    if (line =~ /^RCPT TO\:/)

      return true, "220 OK\r\n"

    end

    if (line =~ /^DATA/)

      @data_mode = true

      return true, "354 Enter message, ending with \".\" on a line by itself\r\n"

    end

    if (@data_mode) && (line.chomp =~ /^.$/)

      @data_mode = false

      return true, "220 OK\r\n"

    end

    if @data_mode

      puts line 

      return true, ""

    else

      return true, "500 ERROR\r\n"

    end

  end

end



a = SMTPServer.new(1234)

a.start

a.join

Send Email in Python with Text File Attachment

minitotoro (Natalie) — Thu, 26 Apr 2007 17:23:42 GMT

// description of your code here
Send an email in python with a text attachment. You can change the attachment type by adjusting the part.startbody label in the attachment section (ie, 'image/jpg' or whatever)



import smtplib, sys, MimeWriter, StringIO, base64

import os

def mail(serverURL=None, sender='', to='', subject='', text=''):

    """

    Usage:

    mail('somemailserver.com', 'me@example.com', 'someone@example.com', 'test', 'This is a test')

    """

    message = StringIO.StringIO()

    writer = MimeWriter.MimeWriter(message)

    writer.addheader('Subject', subject)

    writer.startmultipartbody('mixed')



    # start off with a text/plain part

    part = writer.nextpart()

    body = part.startbody('text/plain')

    body.write(text)



    # now add an attachment

    part = writer.nextpart()

    part.addheader('Content-Transfer-Encoding', 'base64')

    body = part.startbody('text/plain')

    base64.encode(open('myfile.txt', 'rb'), body)



    # finish off

    writer.lastpart()



    # send the mail

    smtp = smtplib.SMTP(serverURL)

    smtp.sendmail(sender, to, message.getvalue())

    smtp.quit()

Send an Email from Python

minitotoro (Natalie) — Thu, 26 Apr 2007 16:24:34 GMT

// description of your code here
Not sure where I got this from, but it does its job. Sends a simple smtp email message in python.



import smtplib

def mail(serverURL=None, sender='', to='', subject='', text=''):

    """

    Usage:

    mail('somemailserver.com', 'me@example.com', 'someone@example.com', 'test', 'This is a test')

    """

    headers = "From: %s\r\nTo: %s\r\nSubject: %s\r\n\r\n" % (sender, to, subject)

    message = headers + text

    mailServer = smtplib.SMTP(serverURL)

    mailServer.sendmail(sender, to, message)

    mailServer.quit()

Authenticate with SMTP server before sending email

mikehale (Michael Hale) — Fri, 19 Jan 2007 00:55:15 GMT

For more info see: http://java.sun.com/products/javamail/javadocs/com/sun/mail/smtp/package-summary.html

You need activation.jar, smtp.jar, and mailapi.jar in your classpath for this to work.



import java.util.Properties;



import javax.mail.Message;

import javax.mail.MessagingException;

import javax.mail.PasswordAuthentication;

import javax.mail.Session;

import javax.mail.Transport;

import javax.mail.internet.InternetAddress;

import javax.mail.internet.MimeMessage;

import javax.mail.internet.MimeMessage.RecipientType;



public class MailWithPasswordAuthentication {

	public static void main(String[] args) throws MessagingException {

		new MailWithPasswordAuthentication().run();

	}



	private void run() throws MessagingException {

		Message message = new MimeMessage(getSession());



		message.addRecipient(RecipientType.TO, new InternetAddress("to@example.com"));

		message.addFrom(new InternetAddress[] { new InternetAddress("from@example.com") });



		message.setSubject("the subject");

		message.setContent("the body", "text/plain");



		Transport.send(message);

	}



	private Session getSession() {

		Authenticator authenticator = new Authenticator();



		Properties properties = new Properties();

		properties.setProperty("mail.smtp.submitter", authenticator.getPasswordAuthentication().getUserName());

		properties.setProperty("mail.smtp.auth", "true");



		properties.setProperty("mail.smtp.host", "mail.example.com");

		properties.setProperty("mail.smtp.port", "25");



		return Session.getInstance(properties, authenticator);

	}



	private class Authenticator extends javax.mail.Authenticator {

		private PasswordAuthentication authentication;



		public Authenticator() {

			String username = "auth-user";

			String password = "auth-password";

			authentication = new PasswordAuthentication(username, password);

		}



		protected PasswordAuthentication getPasswordAuthentication() {

			return authentication;

		}

	}

}

CPP SMTP Client

lordrich () — Tue, 11 Apr 2006 20:43:40 GMT

An SMTP client in CPP, apparently for a Linux machine. It was found in my old source code folder and so may not be fully working.





#include 

#include 

#include 

#include 

#include 



#define HELO "HELO\n"

#define DATA "DATA\n"

#define QUIT "QUIT\n"



FILE *fin;

int sock;

struct sockaddr_in server;

struct hostent *hp, *gethostbyname();

char buf[BUFSIZ+1];

int len;

char *host_id;

char *from_id;

char *to_id;

char *file_id;

char wkstr[100];



/*=====Send a string to the socket=====*/



send_socket(char *s)

{

	write(sock,s,strlen(s));

	write(1,s,strlen(s));

}



/*=====Read a string from the socket=====*/



read_socket()

{

	len = read(sock,buf,BUFSIZ);

	write(1,buf,len);

}



/*=====MAIN=====*/

int main(int argc, char* argv[])

{



if(argc != 5)

{

 printf("USAGE: %s    \n\n", argv[0]);

 exit(1);

}



host_id=argv[1];

from_id=argv[2];

to_id=argv[3];

file_id=argv[4];



/*=====Create Socket=====*/

sock = socket(AF_INET, SOCK_STREAM, 0);

if (sock==-1)

{

 perror("opening stream socket");

 exit(1);

}



/*=====Verify host=====*/

server.sin_family = AF_INET;

hp = gethostbyname(host_id);

if (hp==(struct hostent *) 0)

{

 fprintf(stderr, "%s: unknown host\n", host_id);

 exit(2);

}



/*=====Connect to port 25 on remote host=====*/

printf ("hostent %s\n", hp->h_addr_list[0]);

memcpy((char *) &server.sin_addr, (char *) hp->h_addr, hp->h_length);



server.sin_port=htons(25); /* SMTP PORT */



if (connect(sock, (struct sockaddr *) &server, sizeof server)==-1)

{

 perror("connecting stream socket");

 exit(1);

}



/*=====Write some data then read some =====*/



read_socket(); /* SMTP Server logon string */



send_socket(HELO); /* introduce ourselves */

read_socket(); /*Read reply */



send_socket("MAIL from: "); /* Mail from us */

send_socket(from_id);

send_socket("\n");

read_socket(); /* Sender OK */



send_socket("RCPT To: "); /*Mail to*/

send_socket(to_id);

send_socket("\n");

read_socket(); /*Recipient OK*/



send_socket(DATA);/*body to follow*/

read_socket(); /*ok to send */



fin=fopen(file_id, "r"); /* open file */

while(1)

{

 if(fgets(wkstr, 100, fin)==NULL) break; /* exit on EOF */

 send_socket(wkstr);

}

fclose(fin); /* close file */



send_socket(fin); /*send file*/

send_socket(".\n");



read_socket(); /* OK*/

send_socket(QUIT); /* quit */

read_socket(); /* log off */



/*=====Close socket and finish=====*/

close(sock);

exit(0);

}

Simple webform to test mail

ms_michel (Michel) — Wed, 23 Nov 2005 21:30:33 GMT



<%@ Page Language="C#" %>

<%@ Import Namespace="System.Web.Mail" %>





  

    

    Mail test

  

  

    

      

        Smtp Server : 

        Smtp Username : 

        Smtp Password : 

        From : 

        To : 

        Subject : 

        Message :

python : send a mail (text), with attachments

manatlan (manatlan) — Wed, 21 Sep 2005 20:30:49 GMT



import smtplib

from email.MIMEMultipart import MIMEMultipart

from email.MIMEBase import MIMEBase

from email.MIMEText import MIMEText

from email.Utils import COMMASPACE, formatdate

from email import Encoders

import os



def sendMail(to, subject, text, files=[],server="localhost"):

    assert type(to)==list

    assert type(files)==list

    fro = "Expediteur "



    msg = MIMEMultipart()

    msg['From'] = fro

    msg['To'] = COMMASPACE.join(to)

    msg['Date'] = formatdate(localtime=True)

    msg['Subject'] = subject



    msg.attach( MIMEText(text) )



    for file in files:

        part = MIMEBase('application', "octet-stream")

        part.set_payload( open(file,"rb").read() )

        Encoders.encode_base64(part)

        part.add_header('Content-Disposition', 'attachment; filename="%s"'

                       % os.path.basename(file))

        msg.attach(part)



    smtp = smtplib.SMTP(server)

    smtp.sendmail(fro, to, msg.as_string() )

    smtp.close()





sendMail(

        ["destination@dest.kio"],

        "hello","cheers",

        ["photo.jpg","memo.sxw"]

    )

python : send a mail (text)

manatlan (manatlan) — Thu, 08 Sep 2005 02:38:26 GMT



import smtplib

from email.MIMEText import MIMEText



def sendTextMail(to,sujet,text,server="localhost"):

    fro = "Expediteur "

    mail = MIMEText(text)

    mail['From'] = fro

    mail['Subject'] =sujet

    mail['To'] = to

    smtp = smtplib.SMTP(server)

    smtp.sendmail(fro, [to], mail.as_string())

    smtp.close()

    

sendTextMail("toto@titi.com","hello","cheers")

Sending Mail

aeden (Anthony Eden) — Sat, 09 Apr 2005 05:13:01 GMT

This code requires JavaMail. Specifically it requires mailapi.jar and smtp.jar from the JavaMail distribution (available at http://java.sun.com/) as well as activation.jar from the JavaBeans Activation Framework (available at http://java.sun.com/beans/glasgow/jaf.html).



Properties props = new Properties();

props.put("mail.smtp.host", "your-smtp-host.com");

Session session = Session.getDefaultInstance(props, null);



MimeMessage msg = new MimeMessage(session);

msg.setFrom(new InternetAddress(from));

msg.setRecipient(MimeMessage.RecipientType.TO, new InternetAddress(to));

msg.setSubject(subject);

msg.setSentDate(new Date());

msg.setContent(message, "text/plain");



Transport.send(msg);