Ruby Forum Ruby on Rails > Generate JS from RoR - strange delay with send_data

Hi!

I need to generate some JS from Ruby. This is no AJAX related stuff so 
RJS templates are not help to me. Also I want to not mix JS with HTML, 
so putting JS in .rhtml templates is no go for me.

Currently I made some action in controller, prepared JS code and I'm 
sending it via send_data as 'text/javascript'. In .rhtml templates I use 
<script> tag with src pointing to right controller/action. All works as 
I wanted but there is one issue - after sending data there is big delay 
before JS generated this way is downloaded. I have sniffed traffic with 
Ethereal, and whole JS code is send very fast only closing connection 
looks like:

t=0, server -> client last packet of data
t=t+ 20 ms, client -> server ACK
t=t+ 29 seconds server, -> client FIN, ACK
..... normal TCP teardown follows

29 seconds ! Am I doing something wrong? My action looks like (I've 
removed real JS since it is not problem with generation of JS only with 
sending):

  def show_route
   Point.find(:all, :conditions => [ "route_id = ?", pid]).each {|x|
      output_data<< GENERATE_JS_CODE_FROM_POINTS
   }
   send_data(output_data, :content => "text/javascript")
  end

I'm using Rails 1.1.6.

Or maybe there is some other way to generate 'custom' JS not in .rhtml?


Best regards,
Witold Rugowski
http://nhw.pl/

Witold Rugowski wrote:
> 29 seconds ! Am I doing something wrong? My action looks like (I've 
> removed real JS since it is not problem with generation of JS only with 
> sending):

This is related somehow to WEBrick (which I was using as HTTP server) 
and squid proxy. For some reason there is something wrong with closing 
connection - connection closes only after timeout in WEBrick. I switched 
to lighttpd and all is working ok.

But as a side effect I have patch to Ruby interpreter which dumps all 
called methods with timestamps (during code execution) - this way I 
discovered place where delay was generated. Maybe someone find this 
useful - more details on

http://nhw.pl/wp/2006/09/20/how-to-start-debug-ruby-programs/

Best regards,
--
Witold Rugowski
http://nhw.pl/

Witold Rugowski wrote:
>   
i don't know if it would help, but you could send a content-length 
header