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A real terminal in the browser and JQuery with Django Part II

While
first part focuses on HTML, javascript and CSS code, in this second part, we focus server-side-side, or the code associated with the python
Django framework.

For the explanation of how Django of course refer to the official website, this article lists only the main steps. Let us first the contents of the file urls.py, which describes the pattern of the URL of this application (very simple):

# Copyright (C) 2010 Lorenzo Sfarra (lorenzosfarra@ubuntu.com) # # This program is free software, you can Redistribute it and / or # modify it
under the terms of the GNU General Public License as published by
# the Free Software Foundation; Either
# version 2 of the License, or (at your option) any later version.
# # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU General Public License for more details. #

# You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. # from django.conf.urls.defaults import *
from django.conf import settings

MEDIA_ROOT = settings.MEDIA_ROOT

 urlpatterns = patterns ('', 
 (r '^ cmd / (? P 
 .*)$',' terminaljs.terminal.views.cmd '), 
 (r' ^ media / (? 
 .* P) $ ',' django.views.static.serve ', 
 {' DOCUMENT_ROOT ': MEDIA_ROOT}), 
 (r'^$',' terminaljs.terminal.views.index '), 
) 
 
 
 
 
 define so that a URL with cmd / cmd view the initial calls with a parameter "command", the command to execute. It also defines the URL with "media /" should be the initial static process, and finally define the default URL that invokes the view index. 
 
 Let us now see the code  delle view, definito nel file  
 views.py 
 : 
  
  
  
 # Copyright (C) 2010 Lorenzo Sfarra (lorenzosfarra@ubuntu.com) 
  # 
  # This program is free software; you can redistribute it and/or 
  # modify it under the terms of the GNU General Public License 
  # as published by the Free Software Foundation; either version 2 
  # of the License, or (at your option) any later version.   # 
  # This program is distributed in the hope that it will be useful,   # but WITHOUT ANY WARRANTY; without even the implied warranty of 
  # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the 
  # GNU General Public License for more details. 
   # 
  # You should have received a copy of the GNU General Public License 
  # along with this program; if not, write to the Free Software 

# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
#


from django.shortcuts import render_to_response from django.http import HttpResponse from commands import getoutput
import os.path

 # global variable 
 CWD = "/home/lorenzo" 
  
 def index(request): 
     return render_to_response("index.html") 
  
 def is_trusted_command(command): 
     #TODO: check if it's a trusted command 
     return True 
  
 def cmd(request,  command): 
     global CWD 
     if command.startswith("cd "): 
         new_path = command.split(" ")[1] 
         if not new_path.startswith("/"): 
             # relative path 
             new_path = os.path.join(CWD, new_path) 
         if os.path.isdir(new_path): 
             CWD = new_path 
             output = "" 
         else: 
             output = "cd: " + new_path + ": No such file or directory" 
     elif is_trusted_command(command): 
         output = getoutput("cd %s; %s" %(CWD,command)) 
     else: 
         output = "Untrusted command." 
     return HttpResponse(output) 
 
 
 
 
 be emphasized, as done in the first part, the function 
 is_trusted_command 
 which must also be implemented server-side. 
 
 Obviously, everything is purely demonstrative, for those interested in improving it is all the code on Google Code 
 
. 
 
 
 
 In