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Viewing changes to ivle/webapp/security/views.py

  • Committer: William Grant
  • Date: 2009-12-08 23:45:39 UTC
  • mto: This revision was merged to the branch mainline in revision 1384.
  • Revision ID: grantw@unimelb.edu.au-20091208234539-rtge6krc4uab0ccc
Remove ProjectRESTView, which did nothing and was unused.

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ivle/webapp/security/views.py
 
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# IVLE
 
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# Copyright (C) 2007-2009 The University of Melbourne
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
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# Author: Will Grant, Nick Chadwick
 
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import urllib
 
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import datetime
 
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try:
 
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    import mod_python.Cookie
 
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except ImportError:
 
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    # This needs to be importable from outside Apache.
 
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    pass
 
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import ivle.pulldown_subj
 
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import ivle.webapp.security
 
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from ivle.auth import authenticate, AuthError
 
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from ivle.webapp.base.xhtml import XHTMLView
 
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from ivle.webapp.base.plugins import CookiePlugin
 
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class LoginView(XHTMLView):
 
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    '''A view to allow a user to log in.'''
 
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    template = 'login.html'
 
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    allow_overlays = False
 
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    def authorize(self, req):
 
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        return True
 
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    def populate(self, req, ctx):
 
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        fields = req.get_fieldstorage()
 
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        nexturl = fields.getfirst('url')
 
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        if nexturl is None:
 
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            nexturl = '/'
 
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        # We are already logged in. If it is a POST, they might be trying to
 
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        # clobber their session with some new credentials. That's their own
 
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        # business, so we let them do it. Otherwise, we don't bother prompting
 
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        # and just redirect to the destination.
 
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        # Note that req.user is None even if we are 'logged in', if the user is
 
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        # invalid (state != enabled, or expired).
 
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        if req.method != "POST" and req.user is not None:
 
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            req.throw_redirect(nexturl)
 
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        # Don't give any URL if we want /.
 
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        if nexturl == '/':
 
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            query_string = ''
 
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        else:
 
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            query_string = '?url=' + urllib.quote(nexturl, safe="/~")
 
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        ctx['path'] = req.make_path('+login') + query_string
 
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        # If this succeeds, the user is invalid.
 
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        user = ivle.webapp.security.get_user_details(req)
 
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        if user is not None:
 
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            if user.state == "no_agreement":
 
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                # Authenticated, but need to accept the ToS. Send them there.
 
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                # IMPORTANT NOTE FOR HACKERS: You can't simply disable this
 
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                # if you are not planning to display a ToS page - the ToS
 
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                # acceptance process actually calls usrmgt to create the user
 
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                # jails and related stuff.
 
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                req.throw_redirect(req.make_path('+tos') + query_string)
 
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            elif user.state == "pending":
 
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                # FIXME: this isn't quite the right answer, but it
 
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                # should be more robust in the short term.
 
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                session = req.get_session()
 
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                session.invalidate()
 
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                session.delete()
 
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                user.state = u'no_agreement'
 
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                req.store.commit()
 
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                req.throw_redirect(nexturl)
 
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        if req.method == "POST":
 
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            # While req.user is normally set to get_user_details, it won't set
 
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            # it if the account isn't valid. So we get it ourselves.
 
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            user = ivle.webapp.security.get_user_details(req)
 
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            badlogin = None
 
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            username = fields.getfirst('user')
 
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            password = fields.getfirst('pass')
 
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            if username is not None:
 
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                # From this point onwards, we will be showing an error message
 
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                # if unsuccessful.
 
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                # Authenticate
 
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                if password is None:
 
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                    badlogin = "No password supplied."
 
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                else:
 
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                    user = None
 
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                    try:
 
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                        # Username is case insensitive
 
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                        user = authenticate.authenticate(req.config, req.store,
 
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                                    username.value.lower(), password.value)
 
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                    except AuthError, msg:
 
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                        badlogin = msg
 
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                    if user is None:
 
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                        # Must have got an error. Do not authenticate.
 
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                        # The except: above will have set a message.
 
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                        pass
 
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                    else:
 
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                        # Success - Set the session and redirect to the URL.
 
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                        session = req.get_session()
 
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                        session['login'] = user.login
 
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                        session.save()
 
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                        session.unlock()
 
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                        user.last_login = datetime.datetime.now()
 
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                        # Create cookies for plugins that might request them.
 
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                        for plugin in req.config.plugin_index[CookiePlugin]:
 
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                            for cookie in plugin.cookies:
 
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                                # The function can be None if they just need to be
 
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                                # deleted at logout.
 
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                                if plugin.cookies[cookie] is not None:
 
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                                    req.add_cookie(mod_python.Cookie.Cookie(cookie,
 
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                                          plugin.cookies[cookie](user), path='/'))
 
129
 
 
130
                        # Add any new enrolments.
 
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                        ivle.pulldown_subj.enrol_user(req.config, req.store, user)
 
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                        req.store.commit()
 
133
 
 
134
                        req.throw_redirect(nexturl)
 
135
 
 
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                # We didn't succeed.
 
137
                # Render the login form with the error message.
 
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                ctx['error'] = badlogin
 
139
 
 
140
 
 
141
class LogoutView(XHTMLView):
 
142
    '''A view to log the current session out.'''
 
143
    template = 'logout.html'
 
144
    allow_overlays = False
 
145
 
 
146
    def authorize(self, req):
 
147
        # This can be used by any authenticated user, even if they haven't
 
148
        # accepted the ToS yet.
 
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        return ivle.webapp.security.get_user_details(req) is not None
 
150
 
 
151
    def populate(self, req, ctx):
 
152
        if req.method == "POST":
 
153
            req.logout()
 
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        else:
 
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            ctx['path'] =  req.make_path('+logout')