From: 7stud -- <bbxx789_05ss@...>
Date: 2009-08-05T15:50:08+09:00
Subject: Re: parameter passed by get

David Street wrote:
> A third party has written a program that passes a parameter via the GET
> method.  I need to use it to call a Ruby script and pass a parameter.
> 
> I have researched and experimented for days and cannot figure out how to
> retrieve a GET parameter in a Ruby script.
> 
> Test code to pass the parameter is:
> ---------------------------------------------
> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
> <html>
> <head>
> <title>Test Get</title>
> </head>
> <body>
> <form action = 'http://www.website/cgi-bin/test.rb' method = 'get' />
> <input type = 'hidden' name = 'parameter' value = '12345' />
> <input type = "submit" value = "SUBMIT" />
> </form>
> </body>
> </html>
> ---------------------------------------------
> 
> I believe I should retrieve it with something like this:
> --------------------------------------------------------------------
> #!/usr/bin/ruby
> 
> require 'net/http'
> require 'uri'
> 
> begin
> 
> print "Content-type: text/html\r\n\r\n"
> 
> server = URI.parse( 'localhost/cgi-bin/test.rb' )
> 
> http = Net::HTTP.start( server.host, server.port )
> 
> response = http.get( server.path )
> 
> print response.body
> 
> end
> 
> -------------------------------------------------------------------
> 
> But I always receive 'nil'.   (I've tried many variations).
> 
> http.head( 'www.website.com' ) works and returns values as expected.
> 
> I'm sure this must be simple, but I have tried everything I can think of
> and can't find an example anywhere.
> 
> Thanks to anyone who can assist.
> 
> -David

As far as I can make out, I would liken your html form and your program 
to this situation: you and a friend are standing next to each other 
facing a fence, and there is a fast flowing river on the other side of 
the fence.  You tell your friend to throw baseballs over the fence. 
Then you open your baseball mitt and wonder why no baseballs are landing 
in your mitt.

If you want to catch some of those baseballs, you have to go to the 
other side of the fence.  In ruby, you would do this:

#!/usr/bin/env ruby

require 'cgi'

cgi = CGI.new
value = cgi["parameter"]

print "Content-type: text/html\r\n\r\n"

output =<<ENDOFHTML
<html>
<head><title>Test</title>
</head>
<body>
<div>You sent: #{value} as a hidden parameter.</div>
</body>
</html>
ENDOFHTML

print output

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