Synnefo

# Copyright 2011-2012 GRNET S.A. All rights reserved.

#

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# without modification, are permitted provided that the following

# conditions are met:

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#   1. Redistributions of source code must retain the above

#      copyright notice, this list of conditions and the following

#      disclaimer.

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#   2. Redistributions in binary form must reproduce the above

#      copyright notice, this list of conditions and the following

#      disclaimer in the documentation and/or other materials

#      provided with the distribution.

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# THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS

# OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

# WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR

# CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

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import logging

from traceback import format_exc

from time import time, mktime

from urllib import quote

from urlparse import urlparse

from django.conf import settings

from django.http import HttpResponse

from django.utils import simplejson as json

from django.core.urlresolvers import reverse

from astakos.im.faults import BadRequest, Unauthorized, InternalServerError

from astakos.im.models import AstakosUser

from astakos.im.settings import CLOUD_SERVICES, INVITATIONS_ENABLED

logger = logging.getLogger(__name__)

def render_fault(request, fault):

    if isinstance(fault, InternalServerError) and settings.DEBUG:

        fault.details = format_exc(fault)

    request.serialization = 'text'

    data = fault.message + '\n'

    if fault.details:

        data += '\n' + fault.details

    response = HttpResponse(data, status=fault.code)

    response['Content-Length'] = len(response.content)

    return response

def authenticate(request):

    # Normal Response Codes: 204

    # Error Response Codes: internalServerError (500)

    #                       badRequest (400)

    #                       unauthorised (401)

    try:

        if request.method != 'GET':

            raise BadRequest('Method not allowed.')

        x_auth_token = request.META.get('HTTP_X_AUTH_TOKEN')

        if not x_auth_token:

            return render_fault(request, BadRequest('Missing X-Auth-Token'))

        try:

            user = AstakosUser.objects.get(auth_token=x_auth_token)

        except AstakosUser.DoesNotExist, e:

            return render_fault(request, Unauthorized('Invalid X-Auth-Token'))

        # Check if the is active.

        if not user.is_active:

            return render_fault(request, Unauthorized('User inactive'))

        # Check if the token has expired.

        if (time() - mktime(user.auth_token_expires.timetuple())) > 0:

            return render_fault(request, Unauthorized('Authentication expired'))

        response = HttpResponse()

        response.status=204

        user_info = {'username':user.username,

                     'uniq':user.email,

                     'auth_token':user.auth_token,

                     'auth_token_created':user.auth_token_created.isoformat(),

                     'auth_token_expires':user.auth_token_expires.isoformat()}

        response.content = json.dumps(user_info)

        response['Content-Type'] = 'application/json; charset=UTF-8'

        response['Content-Length'] = len(response.content)

        return response

    except BaseException, e:

        logger.exception(e)

        fault = InternalServerError('Unexpected error')

        return render_fault(request, fault)

def get_services(request):

    if request.method != 'GET':

        raise BadRequest('Method not allowed.')

    callback = request.GET.get('callback', None)

    data = json.dumps(CLOUD_SERVICES)

    mimetype = 'application/json'

    if callback:

        mimetype = 'application/javascript'

        data = '%s(%s)' % (callback, data)

    return HttpResponse(content=data, mimetype=mimetype)

def get_menu(request, with_extra_links=False, with_signout=True):

    location = request.GET.get('location', '')

    exclude = []

    index_url = reverse('index')

    login_url = reverse('login')

    logout_url = reverse('astakos.im.views.logout')

    absolute = lambda (url): request.build_absolute_uri(url)

    l = index_url, login_url, logout_url

    forbidden = []

    for url in l:

        url = url.rstrip('/')

        forbidden.extend([url, url + '/', absolute(url), absolute(url + '/')])

    if location not in forbidden:

        index_url = '%s?next=%s' % (index_url, quote(location))

    l = [{ 'url': absolute(index_url), 'name': "Sign in"}]

    if request.user.is_authenticated():

        l = []

        l.append({ 'url': absolute(reverse('astakos.im.views.index')),

                  'name': request.user.email})

        l.append({ 'url': absolute(reverse('astakos.im.views.edit_profile')),

                  'name': "My account" })

        if with_extra_links:

            if request.user.password:

                l.append({ 'url': absolute(reverse('password_change')),

                          'name': "Change password" })

            if INVITATIONS_ENABLED:

                l.append({ 'url': absolute(reverse('astakos.im.views.invite')),

                          'name': "Invitations" })

            l.append({ 'url': absolute(reverse('astakos.im.views.send_feedback')),

                      'name': "Feedback" })

        if with_signout:

            l.append({ 'url': absolute(reverse('astakos.im.views.logout')),

                      'name': "Sign out"})

    callback = request.GET.get('callback', None)

    data = json.dumps(tuple(l))

    mimetype = 'application/json'

    if callback:

        mimetype = 'application/javascript'

        data = '%s(%s)' % (callback, data)

    return HttpResponse(content=data, mimetype=mimetype)