simple code

Run TCPServer as a simple Web server

A TCPServer accepts incoming TCP connections. Here is a Web server that listens on a given port and returns the time.

require 'socket'
port = (ARGV[0] || 80).to_i
server = TCPServer.new('localhost', port)
while (session = server.accept)
  puts "Request: #{session.gets}"
  session.print "HTTP/1.1 200/OK\r\nContent-type: text/html\r\n\r\n"
  session.print "<html><body><h1>#{Time.now}</h1></body></html>\r\n"
  session.close
end

This code was copied from Programming Ruby: The Pragmatic Programmer's Guide [rubycentral.com] while looking for information on Ruby CGI global variables.

to ruby web server socket simple session port TCPServer localhost by jrobertson on Apr 10, 2008

A simple XSLT example

Produce a list of filenames using XML and XSLT

file: dir.xsl

<?xml version="1.0"?>

<xsl:stylesheet xmlns:xsl="http://www.w3.org/1999/XSL/Transform" version="1.0">
      
    <xsl:template match="dir">
    <div id="articles">
      <ul>
      <xsl:apply-templates select="records/file"/>
      </ul>
    </div>
    </xsl:template>
    
    <xsl:template match="records/file">
      <li><xsl:value-of select="."/></li>
    </xsl:template>
    
</xsl:stylesheet>

file: dir.xml

<dir>
  <summary>
    <directory>./</directory>
  </summary>
  <records>
    <file type='xml'>mjournal.xml</file>
    <file type='rb'>projxmlhelper.rb</file>
    <file type='rb'>feedpopulated.rb</file>
    <file type='rb'>squrl_handler.rb</file>
    <file type='cgi'>snurl.cgi</file>
    <file type='cgi'>dynalert.cgi</file>
    <file type='rb'>password_handler.rb</file>
    <file type='rb'>category.rb</file>
    <file type='rb'>gwd.rb</file>
    <file type='cgi'>new-journal-entry.cgi</file>
  </records>
</dir>

then transforming the XML with the command 'xsltproc dir.xsl dir.xml' produces the following:
output:

<div id='articles'>
  <ul>
    <li>mjournal.xml</li>
    <li>projxmlhelper.rb</li>
    <li>feedpopulated.rb</li>
    <li>squrl_handler.rb</li>
    <li>snurl.cgi</li>
    <li>dynalert.cgi</li>
    <li>password_handler.rb</li>
    <li>category.rb</li>
    <li>gwd.rb</li>
    <li>new-journal-entry.cgi</li>
  </ul>
</div>

to html xml xslt list simple by jrobertson on Feb 25, 2008

Using XMPP4R-Simple to check for activity.

Using XMPP4R--Simple these Ruby code snippets show a user's status change and any messages they may have sent you since the last time.

# user1 changes their status to away
jabber.presence_updates do |friend, old_presence, new_presence|
  puts "Received presence update from #{friend.to_s}: #{new_presence}"
end

# user1 sends the message "do you like Tofu?"
jabber.received_messages do |message|
  puts "Received message from #{message.from}: #{message.body}"
end

Reference: http://xmpp4r-simple.rubyforge.org/

to ruby jabber simple xmpp4r by jrobertson on Feb 22, 2008

Sending a message using XMPP and Ruby

This Ruby code shows how to send an instant message through XMPP [wikipedia.org] using XMPP4R [gna.org]. Source code origin: Ruby and XMPP/Jabber Part 2: Logging in and sending simple messages [famundo.com].

Preparation
- Installed eJabberd on my Gentoo server
- Created 2 user accounts using Pidgin Internet Messenger on my Ubuntu desktop.
- Tested sending messages using Jabber Instant Messaging (Gabber) and Pidgin Internet Messenger.

Installation

gem install xmpp4r

What we will need

require 'rubygems'
require 'xmpp4r'
include Jabber

Logging in

jid = JID::new('yourname@yourdomain.com/Testing')
password = 'yourpassword'
cl = Client::new(jid)
cl.connect
cl.auth(password)

Sending a simple message

to = "user2@yourdomain.com"
subject = "XMPP4R test"
body = "Hi, this is my first try from XMPP4R!!!"
m = Message::new(to, body).set_type(:normal).set_id('1').set_subject(subject)
cl.send m

References:
- Building a Twitter Agent with Ruby and Rails [rubyinside.com]
- http://gentoo-wiki.com/Ejabberd

* update 15:45 18-Feb-08 *
Here's a simpler example I found from Liminal Existence: Announcing Jabber::Simple [romeda.org]

sudo gem install xmpp4r-simple

require 'xmpp4r-simple'

jabber = Jabber::Simple.new('yourname@yourdomain.com', 'yourpassword')
jabber.deliver("user1@yourdomain.com", "Hey! I'm thinking of going Vegetarian - Any suggestions?")

see also: IM Integration With XMPP4r : Part 2 [rubyfleebie.com]

to ruby xmpp jabber simple message xmpp4r ejabberd by jrobertson on Feb 18, 2008

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About this user

Run TCPServer as a simple Web server

A simple XSLT example

Using XMPP4R-Simple to check for activity.

Sending a message using XMPP and Ruby