Re: [Karrigell-main] Avoiding output buffering for pih-scripts

[Helmut J. <jar...@sk...>]

On 10 Jul, Dr. Bernd Zimmermann wrote:
> Hello to all,
> 
> I am using Karrigell with a pih-script and I am calling an external command.
> 
> As for example in apache with modpython the output from the os.system call
> seems to be send unbuffered to the browser, so that one can see what 
> happens.
> 
> In my Karrigell pih-script I tried different versions, but every time 
> the output
> from the external command is send buffered, so that one have to wait 
> until the
> external command is finished to see the result.
> 
> Is there a way to get the output from the external command send unbuffered
> to the browser via Karrigell ?
> 
> Below is the code:
> --- schnippp ---
> <%
>     print "<PRE>"
>     print
>     result = commands.getstatusoutput(command + ziel)
>     print result[1]
>     print
>     if result[0] == 0:
>         # TEST1
>         #os.system(action + " " + option + " " + ziel)
>         # TEST2
>         #result = commands.getoutput(action + " " + option + " " + ziel)
>         # TEST3
>         result = os.popen(action + " " + option + " " + ziel, 'r', 0)
> 
>         for line in result:
>             print line
> 
>     else:
>         print "Check returns no result"
> 
>     print "</PRE>"
> 
> %>
> --- snippp ----
> 
> Is there a simple solution, or is there perhaps a deeper modification in
> Karrigell needed ?
> 
> If there are any hints, it would be great to get them.
> I hope that somebody has got an Idea :-)
> 

Since I am new to Python, here just an idea.
If you are working with Linux open a pseudo terminal.
See the documentation for 'pty'

-- 
Helmut Jarausch

Lehrstuhl fuer Numerische Mathematik
RWTH - Aachen University
D 52056 Aachen, Germany