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# IVLE
# Copyright (C) 2007-2008 The University of Melbourne
#
# 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 St, Fifth Floor, Boston, MA 02110-1301 USA
# Module: dispatch
# Author: Matt Giuca
# Date: 11/12/2007
# This is a mod_python handler program. The correct way to call it is to have
# Apache send all requests to be handled by the module 'dispatch'.
# Top-level handler. Handles all requests to all pages in IVLE.
# Handles authentication (not authorization).
# Then passes the request along to the appropriate ivle app.
from mod_python import apache
import os
import os.path
import conf
import conf.apps
from request import Request
import html
import common.util
from common.util import make_path
def handler(req):
"""Handles a request which may be to anywhere in the site except media.
Intended to be called by mod_python, as a handler.
req: An Apache request object.
"""
# Make the request object into an IVLE request which can be passed to apps
req = Request(req, html.write_html_head)
# TODO: Check req.app to see if it is valid. 404 if not.
# TODO: Check if app requires auth. If so, perform authentication and
# login.
# TODO: If user did not specify an app, HTTP redirect to default app and
# exit.
# Call the specified app with the request object
# TODO: Call a real app.
test_app(req)
# When done, write out the HTML footer if the app has requested it
if req.write_html_head_foot:
# MAKE SURE we write the head (we would never do that if the app, nor
# write_html_foot, ever writes anything - so just to be sure).
req.write("", flush=0)
html.write_html_foot(req)
# Have Apache output its own HTML code if non-200 status codes were found
return req.status
def test_app(req):
"""This (temporary) function serves as an IVLE application. It takes an
IVLE request and conforms to the application API."""
# TEMP: Dummy (test) handler
# Set request attributes
req.content_type = "text/html"
req.write_html_head_foot = True # Have dispatch print head and foot
# Start writing data
req.write("<p>Hello, IVLE!</p>\n")
req.write('<p>')
if req.app == None:
req.write('<b>No app specified</b>')
else:
req.write('<b>' + req.app + '</b> ')
req.write('<img src="' + make_path("media/images/mime/dir.png")
+ '" /> ')
req.write(str(req.path))
req.write("</p>\n")
print_apps_list(req)
def print_apps_list(file):
"""Prints all app tabs, as a UL. Prints a list item for each app that has
a tab.
file: Object with a "write" method - ie. the request object.
Reads from: conf
"""
file.write('<ul class="apptabs">\n')
for urlname in conf.apps.apps_in_tabs:
app = conf.apps.app_url[urlname]
file.write(' <li><a href="')
file.write(make_path(app.dir))
file.write('">')
file.write(app.name)
file.write('</a></li>\n')
file.write('</ul>\n')
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