Re: [Rails] Validating and using Kernal.System

On 27 May 2010 15:43, anon_comp <neocoolstar@gmail.com> wrote:
> Ok so I have a RoR project that seems to be...unconventional lol
>
> I'm attempting to validate the name of the file and using
> Kernal.System to input the file in the system as a parameter.
>
> I've tried validates_presence_of, but that doesn't appear to work
> unless in a model which I don't have. I'm trying to use
> error_messages_for, but I don't understand how to use it or what to
> put in the controller.
>
> As for the Kernal. System, how do you use it so that when the user
> hits "OK", RoR inputs the file in the correct command, runs it, and
> points the user to the generated html file?
>
> Here's the complete code:
>
> trying_controller.rb
> -----------------------------------------------
> class TryingController < ApplicationController
>  def index
>  end
>
>  def to
>    @logfile = params[:logfile]
>  end
>
> end
>
>
>
> index.html.erb
> ---------------------------------------------
> <% form_tag :action => 'to' do %>
>  <%= error_messages_for 'logfile' %>
>  <%= label_tag 'logfile_label', 'Logfile:' %>
>  <%= file_field_tag :logfile %>
>  <%= submit_tag "OK" %>
> <% end %>
>
>
>
> to.html.erb
> --------------------------------------------
> Logfile: <%= @logfile %>

Have I got this right, you are attempting to allow a user in a browser
to enter the name of a system command which will then be run on the
server? If so I hope you realise that is incredibly dangerous. I am
intrigued to know why you wish to allow this.

Colin

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