Rails - Sep 2009 - Calling a commandline function using the onclick button

Hello everyone,

I''ll start by describing what I''m doing and saying that I am a
newbie.
In my ROR (2.1.2) application, would like to send read data from a text
field  using the onclick tag to a python script I wrote.
The problem I encounter is with the onclick tag. I used the system()
function to call the python script, but it doesn''t function. The python
script is only called when I reload the page and not when I click on the
send button.
Who can help me or tell me how to better call the python script once I
click on the send button.
I''ll be grateful for your help.

This is what my code looks like:

<form id="frmmain" name="frmmain"
method="post">
  <input type="text" id="txt_message"
name="txt_message" style="width:
400px;" />
  <input type="button" name="btn_send"
id="btn_send" value="Send"
onclick="<% system(@path + ''myfile.py '' + @partner +
'' txt_message.value
&'') %>" />
</form>
-- 
Posted via http://www.ruby-forum.com/.

On Mon, Sep 07, 2009 at 09:44:31PM +0200, Ngassa Carine
wrote:
> 
> Hello everyone,
> 
> I''ll start by describing what I''m doing and saying that I
am a newbie.
> In my ROR (2.1.2) application, would like to send read data from a text
> field  using the onclick tag to a python script I wrote.
> The problem I encounter is with the onclick tag. I used the system()
> function to call the python script, but it doesn''t function. The
python
> script is only called when I reload the page and not when I click on the
> send button.
> Who can help me or tell me how to better call the python script once I
> click on the send button.
> I''ll be grateful for your help.
> 
> This is what my code looks like:
> 
> <form id="frmmain" name="frmmain"
method="post">
>   <input type="text" id="txt_message"
name="txt_message" style="width:
> 400px;" />
>   <input type="button" name="btn_send"
id="btn_send" value="Send"
> onclick="<% system(@path + ''myfile.py '' +
@partner + '' txt_message.value
> &'') %>" />
> </form>
I have no idea if calling system() from within an ERb template should work
or not, it seems like a pretty wild idea :D

I would try making a controller action that the form submits to, and have
the controller make the system call with the data. I haven''t tested
that but
I would give it a try if possible.

HTH

Matt

On Sep 7, 8:44 pm, Ngassa Carine
<rails-mailing-l...-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:
> Hello everyone,
>
> I''ll start by describing what I''m doing and saying that I
am a newbie.
> In my ROR (2.1.2) application, would like to send read data from a text
> field  using the onclick tag to a python script I wrote.
> The problem I encounter is with the onclick tag. I used the system()
> function to call the python script, but it doesn''t function. The
python
> script is only called when I reload the page and not when I click on the
> send button.
> Who can help me or tell me how to better call the python script once I
> click on the send button.
> I''ll be grateful for your help.
>
> This is what my code looks like:
>
> <form id="frmmain" name="frmmain"
method="post">
>   <input type="text" id="txt_message"
name="txt_message" style="width:
> 400px;" />
>   <input type="button" name="btn_send"
id="btn_send" value="Send"
> onclick="<% system(@path + ''myfile.py '' +
@partner + '' txt_message.value
> &'') %>" />
> </form>
> --
I think you have a basic misunderstanding of how erb templates work.
Anything in <% or <%= tags is evaluated when the template is rendered
- that is what rendering an erb template means. Furthermore, an
onclick options can only be a chunk of javascript.
As Matt says, you need to write a controller action that your form is
submitted to. Furthermore, be careful of the data you receive - if the
example you posted worked it would allow a user to run arbitrary shell
commands on your server.

Fred
> Posted viahttp://www.ruby-forum.com/.

> As Matt says, you need to write a controller action that your form is
> submitted to.
Ok, thanks for the quick reply.
I''ll try writing a controller action.
-- 
Posted via http://www.ruby-forum.com/.

> I''ll try writing a controller action.
The idea with the controller action was really a good one.
Now I can call the pythonscript without problem while clicking on a 
link, but it still cannot read from the form.
How can I do this, or what should be written at the place of :msg => 
"$(''txt_message'').value".
This is what my code now looks like:

<form id="frmmain" name="frmmain"
method="post">
  <input type="text" id="txt_message"
name="txt_message" style="width:
400px;" value="test" />
  <%=link_to_remote ''send'', :url => { :action =>
''sendmsg'', :controller
=> ''contacts'', :partner => @partner, :msg =>
"$(''txt_message'').value" }
%>
</form>

Carine
-- 
Posted via http://www.ruby-forum.com/.

On 8 Sep 2009, at 12:59, Ngassa Carine wrote:
>
>> I''ll try writing a controller action.
>
> The idea with the controller action was really a good one.
> Now I can call the pythonscript without problem while clicking on a
> link, but it still cannot read from the form.
> How can I do this, or what should be written at the place of :msg =>
> "$(''txt_message'').value".
Read up about the :with option to link to remote (I wrote a bit about  
it a while ago:
http://www.spacevatican.org/2008/5/17/with-or-without-you-link_to_remote-s-mysterious-parameter
  )

Fred
> This is what my code now looks like:
>
> <form id="frmmain" name="frmmain"
method="post">
>  <input type="text" id="txt_message"
name="txt_message" style="width:
> 400px;" value="test" />
>  <%=link_to_remote ''send'', :url => { :action =>
''sendmsg'', :controller
> => ''contacts'', :partner => @partner, :msg =>
"$
> (''txt_message'').value" }
> %>
> </form>
>
> Carine
> -- 
> Posted via http://www.ruby-forum.com/.
>
> >

Thanks to you all,

I got my problem solved using the form_tag and I could query the entry 
from the field using params[:myparameter] and use them in the controller 
action. Using :with also functioned.

Carine
-- 
Posted via http://www.ruby-forum.com/.