Synnefo

# Copyright 2011-2013 GRNET S.A. All rights reserved.

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from django.http import HttpResponse

from django.views.decorators.csrf import csrf_exempt

from snf_django.lib import api

from snf_django.lib.api import faults

from pithos.api.settings import UNSAFE_DOMAIN, UPDATE_MD5

from pithos.api.util import (put_object_headers, update_manifest_meta,

                             validate_modification_preconditions,

                             validate_matching_preconditions,

                             object_data_response, api_method,

                             split_container_object_string, restrict_to_host)

import logging

logger = logging.getLogger(__name__)

@csrf_exempt

@restrict_to_host(UNSAFE_DOMAIN)

def public_demux(request, v_public):

    if request.method == 'HEAD':

        return public_meta(request, v_public)

    elif request.method == 'GET':

        return public_read(request, v_public)

    else:

        return api.api_method_not_allowed(request)

@api_method(http_method="HEAD", token_required=False, user_required=False,

            logger=logger)

def public_meta(request, v_public):

    # Normal Response Codes: 204

    # Error Response Codes: internalServerError (500),

    #                       itemNotFound (404),

    #                       badRequest (400)

    request.user_uniq = None

    try:

        v_account, v_container, v_object = request.backend.get_public(

            request.user_uniq,

            v_public)

        meta = request.backend.get_object_meta(request.user_uniq, v_account,

                                               v_container, v_object, 'pithos')

        public = request.backend.get_object_public(

            request.user_uniq, v_account,

            v_container, v_object)

    except:

        raise faults.ItemNotFound('Object does not exist')

    if not public:

        raise faults.ItemNotFound('Object does not exist')

    update_manifest_meta(request, v_account, meta)

    response = HttpResponse(status=200)

    put_object_headers(response, meta, True)

    return response

@api_method(http_method="GET", token_required=False, user_required=False,

            logger=logger)

def public_read(request, v_public):

    # Normal Response Codes: 200, 206

    # Error Response Codes: internalServerError (500),

    #                       rangeNotSatisfiable (416),

    #                       preconditionFailed (412),

    #                       itemNotFound (404),

    #                       badRequest (400),

    #                       notModified (304)

    request.user_uniq = None

    try:

        v_account, v_container, v_object = request.backend.get_public(

            request.user_uniq,

            v_public)

        meta = request.backend.get_object_meta(request.user_uniq, v_account,

                                               v_container, v_object, 'pithos')

        public = request.backend.get_object_public(

            request.user_uniq, v_account,

            v_container, v_object)

    except:

        raise faults.ItemNotFound('Object does not exist')

    if not public:

        raise faults.ItemNotFound('Object does not exist')

    update_manifest_meta(request, v_account, meta)

    # Evaluate conditions.

    validate_modification_preconditions(request, meta)

    try:

        validate_matching_preconditions(request, meta)

    except faults.NotModified:

        response = HttpResponse(status=304)

        response['ETag'] = meta['hash'] if not UPDATE_MD5 else meta['checksum']

        return response

    sizes = []

    hashmaps = []

    if 'X-Object-Manifest' in meta:

        try:

            src_container, src_name = split_container_object_string(

                '/' + meta['X-Object-Manifest'])

            objects = request.backend.list_objects(

                request.user_uniq, v_account,

                src_container, prefix=src_name, virtual=False)

        except:

            raise faults.ItemNotFound('Object does not exist')

        try:

            for x in objects:

                s, h = request.backend.get_object_hashmap(request.user_uniq,

                                                          v_account,

                                                          src_container,

                                                          x[0], x[1])

                sizes.append(s)

                hashmaps.append(h)

        except:

            raise faults.ItemNotFound('Object does not exist')

    else:

        try:

            s, h = request.backend.get_object_hashmap(

                request.user_uniq, v_account,

                v_container, v_object)

            sizes.append(s)

            hashmaps.append(h)

        except:

            raise faults.ItemNotFound('Object does not exist')

    return object_data_response(request, sizes, hashmaps, meta, True)