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James Robertson http://www.r0bertson.co.uk

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Redirect a URL with Ruby CGI

#!/usr/bin/ruby

require 'cgi'

cgi = CGI.new
print cgi.header({'Status' => '302 Moved', 'location' =>  'http://www.wired.com'})

or
url = 'http://www.wired.com/'
print cgi.header({'status'=>'REDIRECT', 'Location'=>url})


References:
RE: cgi redirect [nagaokaut.ac.jp]
Ruby/CGI - assari [mokehehe.com]
HTTP/1.1: Status Code Definitions [w3.org]
to ruby http cgi codes redirect status by jrobertson on Apr 21, 2008

Instruct a shared whiteboard to save and refresh

The following code used with the ProjectX API informs the client web browser that the whiteboard will be refreshed in 5 seconds. It then archives the current whiteboard information, formats it, and sends a message to each web browser to refresh their view.

<project name="whiteboardqueue">
  <methods>
    <method name="create">
      <params>
        <param var="type">ecmascript</param>
        <param var="body">startRefresh(5)</param>
        <param var="sender">system</param>
      </params>
    </method>
    <method name="timer">
      <params>
        <param var="timer">5</param>
      </params>
    </method>
    <method name="archive_and_format">
      <params/>
    </method>
    <method name="create">
      <params>
        <param var="type">ecmascript</param>
        <param var="body">reloadDocument()</param>
        <param var="sender">system</param>
      </params>
    </method>
  </methods>
</project>


*update 1:14am*
The whiteboard demo [rorbuilder.info] allows the user to draw using the mouse within the web browser which renders SVG. Tested on Flock and Firefox.

*update 4:42pm 28 Mar 08*
You can also view the whiteboard message queue [rorbuilder.info].

*update 6:29pm Mar 08*
I've created a short url (http://rubyurl.com/vxHD) (to demonstrate the cleaning of the whiteboard) which redirects to this http://rorbuilder.info/api/projectx.cgi?xml_project=<project name="whiteboardqueue"><methods><method name="create"><params><param var="type">ecmascript</param><param var="body">startRefresh(5)</param><param var="sender">system</param></params></method><method name="timer"><params><param var="timer">5</param></params></method><method name="archive_and_format"><params/></method><method name="create"><params><param var="type">ecmascript</param><param var="body">reloadDocument()</param><param var="sender">system</param></params></method></methods></project>

I've
to ruby xml cgi queue api message projectx ecmascript whiteboard by jrobertson on Mar 27, 2008

Upload a file using Ruby

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 '<result>'

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

# OR (functionally the same)
tmpfile = cgi.params['myfile'][0].path

# create a Tempfile reference
fromfile = cgi.params['myfile'].first

#displays the original file name as supplied in the form
puts fromfile.original_filename

# displays the content (mime) type e.g. text/html
puts fromfile.content_type

# create output file reference as original filename in our chosen directory
tofile = '/var/www/yourdomain.com/htdocs/r/'+fromfile.original_filename

# copy the file
# note the untaint prevents a security error
# cgi sets up an StringIO object if file < 10240
# or a Tempfile object following works for both
File.open(tofile.untaint, 'w') { |file| file << fromfile.read}
# when the page finishes the Tempfile/StringIO!) thing is deleted automatically

print '</result>'

file: file_upload.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
  "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en">
  <head>
    <title>File upload</title>
    <meta http-equiv="Content-Type" content="text/html;charset=utf-8"/>
  </head>
  <body>
    <form name='fileupload' enctype="multipart/form-data" 
    action='/p/file_upload.cgi' method='post'>
    <input type='file' name='myfile' size="40" />
    <input type='submit' value"Send it"/>
    </form>
  </body>
</html>
to ruby form web cgi page upload file by jrobertson on Feb 23, 2008

Unify the handling of XML records

This Ruby code creates, updates or deletes an XML record, using a hash, record handling objects, and XML to invoke the correct method. 

#file: recordx_handler.rb
require 'recordx'

class RecordX_Update < RecordX
  def call(params)
    #todo: write the code to read the xml parameter string
    update_record(h)
    save_file 
  end
end

class RecordX_Create < RecordX
  def call(params)
    #todo: write the code to read the xml parameter string  
    create_record(h)
  end
end

class RecordX_Delete < RecordX
  def call(params)
    doc = Document.new(params)
    node = doc.root.elements["param[@var='id']"]
    puts node
    id = node.attributes.get_attribute('val').to_s
    delete_record(id)
    puts 'deleted record ' + id
    save_file
  end
end

class RecordX_handler
  def invoke(method, params)
    h = Hash.new
    h["create"] = RecordX_Create.new
    h["update"] = RecordX_Update.new
    h["delete"] = RecordX_Delete.new
    h[method].call(params)
  end
end

if __FILE__ == $0
  xml_method = "<method name='delete'><params><param var='id' val='17648' /></params></method>"
  doc = Document.new(xml_method)
  method = doc.root.attributes.get_attribute('name').to_s
  params = doc.root.elements['params'].to_s

  rh = RecordX_handler.new
  rh.invoke(method, params)
end


This code is intended to be called by a Ruby CGI script which can simply relay the cgi post argument to the recordx_handler object.
to ruby rexml cgi method params by jrobertson on Dec 02, 2007

A simple test case using Ruby and XML - Part III

This Ruby CGI script tests a class, by reading the testdata from an XML file, then outputs the result to the web browser. Refer to parts 1 http://urltea.com/1p7h [dzone.com], and II http://urltea.com/1p7m [dzone.com]

#file: test-feed.cgi

require 'test_feed'

puts "Content-Type: text/xml"
puts

puts "<test_report>"
tf = Test_feed.new()
puts tf.plan
puts "<actual>"
tf.print('create_file', tf.tested)
puts "</actual>"
puts "</test_report>"
to ruby test xml cgi case by jrobertson on Oct 09, 2007
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