[Tutor] pstree cgi-script

[Danny Yoo]

On Tue, 15 Jun 2004, Chad Crabtree wrote:

> --- Conrad Gavin <gubbs at fudo.org> wrote:
> > Hi there.
> >
> > I'm trying to write a simple little cgi-script that executes pstree
> > and
> > echos/prints the output to the webpage ..
> >
> > Clearly I am doing it wrong, as it will not work.
> >
> > Here's my code:
> >
> > #!/usr/bin/python
> >
> > import os
> > cmd = "pstree"
> > status = os.system(cmd)
> > print "Status:", status
> >
> Ok this is an easy one.  I also had this problem at first with cgi.
> you need to put
> print "text/plain/n/n"
>
> The two caraiage returns are important.  There you go good luck


Hi Chad,

Small correction: this should really be:

###
print "Content-type: text/plain\n\n"
###

according to the CGI spec:

    http://hoohoo.ncsa.uiuc.edu/cgi/out.html


The reason why the Content-type header is important, and why it has to be
explicitely defined, is because CGI programs can generate more than
dynamic text content: CGI's can just as easily do things like dynamic
images.  Page counters are one example of such a dynamic image CGI.


Hope this helps!