Synnefo

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

#

# Redistribution and use in source and binary forms, with or

# 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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# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF

# USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED

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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN

# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE

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# The views and conclusions contained in the software and

# documentation are those of the authors and should not be

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import logging

import urllib

from functools import wraps

from traceback import format_exc

from time import time, mktime

from urllib import quote

from urlparse import urlparse

from collections import defaultdict

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.api.faults import *

from astakos.im.models import AstakosUser, Service

from astakos.im.settings import INVITATIONS_ENABLED, COOKIE_NAME, EMAILCHANGE_ENABLED

from astakos.im.util import epoch

from astakos.im.api import _get_user_by_email, _get_user_by_username

logger = logging.getLogger(__name__)

format = ('%a, %d %b %Y %H:%M:%S GMT')

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 api_method(http_method=None, token_required=False, perms=None):

    """Decorator function for views that implement an API method."""

    if not perms:

        perms = []

    def decorator(func):

        @wraps(func)

        def wrapper(request, *args, **kwargs):

            try:

                if http_method and request.method != http_method:

                    raise BadRequest('Method not allowed.')

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

                if token_required:

                    if not x_auth_token:

                        raise Unauthorized('Access denied')

                    try:

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

                        ## Check if the token has expired.

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

                        #    raise Unauthorized('Authentication expired')

                        if not user.has_perms(perms):

                            raise Forbidden('Unauthorized request')

                    except AstakosUser.DoesNotExist, e:

                        raise Unauthorized('Invalid X-Auth-Token')

                    kwargs['user'] = user

                response = func(request, *args, **kwargs)

                return response

            except Fault, fault:

                return render_fault(request, fault)

            except BaseException, e:

                logger.exception('Unexpected error: %s' % e)

                fault = InternalServerError('Unexpected error')

                return render_fault(request, fault)

        return wrapper

    return decorator

@api_method(http_method='GET', token_required=True)

def authenticate_old(request, user=None):

    # Normal Response Codes: 204

    # Error Response Codes: internalServerError (500)

    #                       badRequest (400)

    #                       unauthorised (401)

    if not user:

        raise BadRequest('No user')

    # Check if the is active.

    if not user.is_active:

        raise Unauthorized('User inactive')

    # Check if the token has expired.

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

        raise Unauthorized('Authentication expired')

    if not user.signed_terms():

        raise Unauthorized('Pending approval terms')

    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(),

                 'has_credits':user.has_credits,

                 'has_signed_terms':user.signed_terms()}

    response.content = json.dumps(user_info)

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

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

    return response

@api_method(http_method='GET', token_required=True)

def authenticate(request, user=None):

    # Normal Response Codes: 204

    # Error Response Codes: internalServerError (500)

    #                       badRequest (400)

    #                       unauthorised (401)

    if not user:

        raise BadRequest('No user')

    # Check if the is active.

    if not user.is_active:

        raise Unauthorized('User inactive')

    # Check if the token has expired.

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

        raise Unauthorized('Authentication expired')

    if not user.signed_terms():

        raise Unauthorized('Pending approval terms')

    response = HttpResponse()

    response.status=204

    user_info = {'userid':user.username,

                 'email':[user.email],

                 'name':user.realname,

                 'auth_token':user.auth_token,

                 'auth_token_created':epoch(user.auth_token_created),

                 'auth_token_expires':epoch(user.auth_token_expires),

                 'has_credits':user.has_credits,

                 'is_active':user.is_active,

                 'groups':[g.name for g in user.groups.all()]}

    response.content = json.dumps(user_info)

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

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

    return response

@api_method(http_method='GET')

def get_services(request):

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

    services = Service.objects.all()

    data = tuple({'name':s.name, 'url':s.url, 'icon':s.icon} for s in services)

    data = json.dumps(data)

    mimetype = 'application/json'

    if callback:

        mimetype = 'application/javascript'

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

    return HttpResponse(content=data, mimetype=mimetype)

@api_method()

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

    index_url = reverse('index')

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

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

    cookie = urllib.unquote(request.COOKIES.get(COOKIE_NAME, ''))

    email = cookie.partition('|')[0]

    try:

        user = AstakosUser.objects.get(email=email, is_active=True)

    except AstakosUser.DoesNotExist:

        pass

    else:

        l = []

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

                  'name': user.email})

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

                  'name': "My account" })

        if with_extra_links:

            if user.has_usable_password():

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

                          'name': "Change password" })

            if EMAILCHANGE_ENABLED:

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

                          'name': "Change email"})

            if INVITATIONS_ENABLED:

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

                          'name': "Invitations" })

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

@api_method(http_method='GET', token_required=True)

def get_user_by_email(request, user=None):

    # Normal Response Codes: 200

    # Error Response Codes: internalServerError (500)

    #                       badRequest (400)

    #                       unauthorised (401)

    #                       forbidden (403)

    #                       itemNotFound (404)

    email = request.GET.get('name')

    return _get_user_by_email(email)

@api_method(http_method='GET', token_required=True)

def get_user_by_username(request, user_id, user=None):

    # Normal Response Codes: 200

    # Error Response Codes: internalServerError (500)

    #                       badRequest (400)

    #                       unauthorised (401)

    #                       forbidden (403)

    #                       itemNotFound (404)

    return _get_user_by_username(user_id)