Synnefo

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

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import logging

from functools import wraps

from time import time, mktime

from urlparse import urlparse

from collections import defaultdict

from django.http import HttpResponse

from django.utils import simplejson as json

from astakos.im.api.faults import *

from astakos.im.api import render_fault

from astakos.im.models import AstakosUser, Service

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 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)

                        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(),

                 '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', 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', token_required=True, perms=['im.can_access_userinfo'])

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, perms=['im.can_access_userinfo'])

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)