From: sera@... (Francis Hwang)
Date: 2004-09-20T23:54:39+09:00
Subject: Passing in CGI parameters to an .rhtml file with StringIO#instance_eval

There's probably something really simple I'm missing here, but: I'm
trying to run an Eruby file from inside a Ruby class, and find a
general way to pass in the CGI parameters, but I'm stumbling on that.
I figured that for a get, CGI parameters are effectively passed in via
$stdin, so I tried this:

compiler = ERuby::Compiler.new()
src = nil
File.open( @rhtml ) { |file| src = compiler.compile_file( file ) }
arg_strings = args.collect { |pair|
	"#{ pair.first.to_s }=#{ pair.last.to_s }"
}
arg_str = arg_strings.join( '&' )
stringio_in = StringIO.new( arg_str )
orig_stdin = $stdin
$stdin = StringIO.new( arg_str )
begin
	stringio = StringIO.new
	stringio.instance_eval src
	stringio.string
ensure
	$stdin = orig_stdin
end

But that doesn't seem to work. Suggestions?

Francis