modrepublic

This code uses the Ruby gem 'syntax' to create an XML file containing the HTML tags around the code, which is then transformed into an HTML file. The working example was first built using coding examples from Howto format ruby code for blogs [wolfman.com] and Formatting Ruby and HTML code for blog posting [blogspot.com]

#!/usr/bin/ruby

#file: ruby2html.rb

This code will output a text file as an XML file which can later be transformed into an HTML file using a back-end XSLT processor called Gorg.

#!/usr/bin/ruby

#file: rubytxt2xml.rb

require 'rexml/document'
include REXML

class RubyTxt2XML

def rubytxt2xml(h)
h[:infilepath] = './' if h[:infilepath].nil?
h[:outfilepath] = './' if h[:outfilepath].nil?
h[:xmlfile] = h[:sourcefile][/^(.*)\.\w+$/,1] + '.xml' if h[:xmlfile].nil?

The following code was used to upload an image file to the web server. Source code origin: Ruby Language Stuff | mod_ruby File upload scripts [zytrax.com]

file: file_upload.cgi

#!/usr/bin/ruby

# ruby script fragment
require 'cgi'
require 'stringio'

cgi = CGI.new() # New CGI object
puts "Content-Type: text/plain"
puts
print ''

# get uri of tx'd file (in tmp normally)
tmpfile = cgi.params['myfile'].first.path

Following on from the post A simple XSLT example [dzone.com], this code lists all files which have the type 'rb' (equivalent to ls *.rb).

file: dir.xsl

output:

• projxmlhelper.rb
• feedpopulated.rb
• squrl_handler.rb

In Donald Knuth's TAoCP Pre-Fascicle 1a: Bitwise Tricks and Techniques, he shows a patchwork quilt defined by f(x, y) = ((x ^ y) & ((y - 350) >> 3)) ** 2, designed by D. Sleator in 1976. I wanted to recreate this quilt myself using Ruby. The following program generates a PNG file of the "quilt."

require 'rubygems'
require 'png'

def f(x, y)
( (x ^ y) & ((y - 350) >> 3) ) ** 2
end

canvas = PNG::Canvas.new(500, 500)

0.upto(499) do |y|
0.upto(499) do |x|

The eval method in Ruby executes ruby code from a string.

eval("puts 'Hello World'")

output:

Hello World

// description of your code here

# for WATIR scripts by marekj testr.us
module TestRun

# TestRun.record(__FILE__,{:1, 'Bacon', :2, 'Apple', :3, 'Cheese'})
#
# writes or appends a yaml doc to file named filename as the file that invoked the method
# ---
# :1: Bacon
# :2: Apple
# :3: Cheese
#
# example: if __FILE__ is c:\foofoo\away\in\windowz\land\scirptname.rb then

This example will show you how to escape and un-escape a value to be included in a URI and within HTML.

require 'cgi'

# escape
name = "ruby?"
value = "yes"
url = "http://example.com/?" + CGI.escape(name) + '=' + CGI.escape(value) + "&var=T"
# url: http://example.com/?ruby%3F=yes&var=T
html = %(example)
# html: example

# unescape
name_encoded = html.match(/http:([^"]+)/)[0]

You might have already ready about Windows Alternate Data Streams (also known as System Forks on other operating systems) which are supported by most Windows operating systems that use NTFS (New Technology File System). Alternate Data Streams can contain any kind of information including textual, visual and executable. Malicious users can take advantage of the fact that the size of the additional content is not added to the size of the file in a directory listing. A 10 Kilobyte image will still show a size of 10 Kilobyte if someone else adds a 1 Megabyte executable to it.