code.grnet.gr Git - pithos/blob - snf-pithos-app/pithos/api/public.py

   1 # Copyright 2011-2012 GRNET S.A. All rights reserved.
   2 #
   3 # Redistribution and use in source and binary forms, with or
   4 # without modification, are permitted provided that the following
   5 # conditions are met:
   6 #
   7 #   1. Redistributions of source code must retain the above
   8 #      copyright notice, this list of conditions and the following
   9 #      disclaimer.
  10 #
  11 #   2. Redistributions in binary form must reproduce the above
  12 #      copyright notice, this list of conditions and the following
  13 #      disclaimer in the documentation and/or other materials
  14 #      provided with the distribution.
  15 #
  16 # THIS SOFTWARE IS PROVIDED BY GRNET S.A. ``AS IS'' AND ANY EXPRESS
  17 # OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
  18 # WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  19 # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GRNET S.A OR
  20 # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  21 # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  22 # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
  23 # USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  24 # AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25 # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
  26 # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  27 # POSSIBILITY OF SUCH DAMAGE.
  28 #
  29 # The views and conclusions contained in the software and
  30 # documentation are those of the authors and should not be
  31 # interpreted as representing official policies, either expressed
  32 # or implied, of GRNET S.A.
  33
  34 import logging
  35
  36 from django.http import HttpResponse
  37 from django.views.decorators.csrf import csrf_exempt
  38
  39 from synnefo.lib.astakos import get_user
  40
  41 from pithos.api.faults import (Fault, BadRequest, ItemNotFound)
  42 from pithos.api.util import (put_object_headers, update_manifest_meta,
  43     validate_modification_preconditions, validate_matching_preconditions,
  44     object_data_response, api_method)
  45 from pithos.api.short_url import decode_url
  46 from pithos.api.settings import AUTHENTICATION_URL, AUTHENTICATION_USERS
  47
  48
  49 logger = logging.getLogger(__name__)
  50
  51
  52 @csrf_exempt
  53 def public_demux(request, v_public):
  54     get_user(request, AUTHENTICATION_URL, AUTHENTICATION_USERS)
  55     if request.method == 'HEAD':
  56         return public_meta(request, v_public)
  57     elif request.method == 'GET':
  58         return public_read(request, v_public)
  59     else:
  60         return method_not_allowed(request)
  61
  62 @api_method('HEAD', user_required=False)
  63 def public_meta(request, v_public):
  64     # Normal Response Codes: 204
  65     # Error Response Codes: internalServerError (500),
  66     #                       itemNotFound (404),
  67     #                       badRequest (400)
  68
  69     try:
  70         v_account, v_container, v_object = request.backend.get_public(request.userid,
  71                                                     decode_url(v_public))
  72         meta = request.backend.get_object_meta(request.userid, v_account,
  73                                                     v_container, v_object, 'pithos')
  74         public = request.backend.get_object_public(request.userid, v_account,
  75                                                     v_container, v_object)
  76     except:
  77         raise ItemNotFound('Object does not exist')
  78
  79     if not public:
  80         raise ItemNotFound('Object does not exist')
  81     update_manifest_meta(request, v_account, meta)
  82
  83     response = HttpResponse(status=200)
  84     put_object_headers(response, meta, True)
  85     return response
  86
  87 @api_method('GET', user_required=False)
  88 def public_read(request, v_public):
  89     # Normal Response Codes: 200, 206
  90     # Error Response Codes: internalServerError (500),
  91     #                       rangeNotSatisfiable (416),
  92     #                       preconditionFailed (412),
  93     #                       itemNotFound (404),
  94     #                       badRequest (400),
  95     #                       notModified (304)
  96
  97     try:
  98         v_account, v_container, v_object = request.backend.get_public(request.userid,
  99                                                     decode_url(v_public))
 100         meta = request.backend.get_object_meta(request.userid, v_account,
 101                                                     v_container, v_object, 'pithos')
 102         public = request.backend.get_object_public(request.userid, v_account,
 103                                                     v_container, v_object)
 104     except:
 105         raise ItemNotFound('Object does not exist')
 106
 107     if not public:
 108         raise ItemNotFound('Object does not exist')
 109     update_manifest_meta(request, v_account, meta)
 110
 111     # Evaluate conditions.
 112     validate_modification_preconditions(request, meta)
 113     try:
 114         validate_matching_preconditions(request, meta)
 115     except NotModified:
 116         response = HttpResponse(status=304)
 117         response['ETag'] = meta['ETag']
 118         return response
 119
 120     sizes = []
 121     hashmaps = []
 122     if 'X-Object-Manifest' in meta:
 123         try:
 124             src_container, src_name = split_container_object_string('/' + meta['X-Object-Manifest'])
 125             objects = request.backend.list_objects(request.userid, v_account,
 126                                 src_container, prefix=src_name, virtual=False)
 127         except:
 128             raise ItemNotFound('Object does not exist')
 129
 130         try:
 131             for x in objects:
 132                 s, h = request.backend.get_object_hashmap(request.userid,
 133                                         v_account, src_container, x[0], x[1])
 134                 sizes.append(s)
 135                 hashmaps.append(h)
 136         except:
 137             raise ItemNotFound('Object does not exist')
 138     else:
 139         try:
 140             s, h = request.backend.get_object_hashmap(request.userid, v_account,
 141                                                         v_container, v_object)
 142             sizes.append(s)
 143             hashmaps.append(h)
 144         except:
 145             raise ItemNotFound('Object does not exist')
 146
 147     if 'Content-Disposition' not in meta:
 148         name = v_object.rstrip('/').split('/')[-1]
 149         if not name:
 150             name = v_public
 151         meta['Content-Disposition'] = 'attachment; filename=%s' % (name,)
 152
 153     return object_data_response(request, sizes, hashmaps, meta, True)
 154
 155 @api_method(user_required=False)
 156 def method_not_allowed(request, **v_args):
 157     raise ItemNotFound('Object does not exist')