Validating and using Kernal.System

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

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

In essence yes, but the user input is just an added command that won't
do anything if they don't have a log file, or the rather, the correct
log format. I'm mostly using this for personal use and am totally
aware that it's incredibly dangerous. I just can't think of another
way to do this.

In essence yes, but the user input is just an added command that won't
do anything if they don't have a log file, or the rather, the correct
log format. I'm mostly using this for personal use and am totally
aware that it's incredibly dangerous. I just can't think of another
way to do this.

Could you not top post please, it makes it easier to follow the thread
if you insert your replies inline.

So what exactly is the problem then? First look in the log file
(log/development.log) and see if the parameter is being passed
correctly when they submit. If this is ok what do you want to do with
his input?

Colin

Could you not top post please, it makes it easier to follow the thread
if you insert your replies inline.

Sorry about that

So what exactly is the problem then? First look in the log file
(log/development.log) and see if the parameter is being passed
correctly when they submit. If this is ok what do you want to do with
his input?

The parameters are being passed correctly. What I want to do is pass
the parameters to the command (added on to another command already in
it) despite the security issues already pointed out.

That being said, I figured the issue out easly -headdesk-

(for people who may or may not need it in the future and for
documenting purposes...)
trying_controller.rb

Just do the checks on @logfile after you pick it up from params. I
would suggest checking for nil first then a regular expression test to
check the format. Google for ruby regular expression will give you
loads of clues.

Colin

Good idea! I'm making a lot of headway.

Thanks,
anon_comp