code.grnet.gr Git - pithos/blob - 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 pithos.api.faults import (Fault, BadRequest, ItemNotFound)
  40 from pithos.api.util import (put_object_headers, update_manifest_meta,
  41     validate_modification_preconditions, validate_matching_preconditions,
  42     object_data_response, api_method)
  43 from pithos.api.short_url import decode_url
  44
  45
  46 logger = logging.getLogger(__name__)
  47
  48
  49 @csrf_exempt
  50 def public_demux(request, v_public):
  51     if request.method == 'HEAD':
  52         return public_meta(request, v_public)
  53     elif request.method == 'GET':
  54         return public_read(request, v_public)
  55     else:
  56         return method_not_allowed(request)
  57
  58 @api_method('HEAD', user_required=False)
  59 def public_meta(request, v_public):
  60     # Normal Response Codes: 204
  61     # Error Response Codes: internalServerError (500),
  62     #                       itemNotFound (404),
  63     #                       badRequest (400)
  64
  65     try:
  66         v_account, v_container, v_object = request.backend.get_public(request.user_uniq,
  67                                                     decode_url(v_public))
  68         meta = request.backend.get_object_meta(request.user_uniq, v_account,
  69                                                     v_container, v_object, 'pithos')
  70         public = request.backend.get_object_public(request.user_uniq, v_account,
  71                                                     v_container, v_object)
  72     except:
  73         raise ItemNotFound('Object does not exist')
  74
  75     if not public:
  76         raise ItemNotFound('Object does not exist')
  77     update_manifest_meta(request, v_account, meta)
  78
  79     response = HttpResponse(status=200)
  80     put_object_headers(response, meta, True)
  81     return response
  82
  83 @api_method('GET', user_required=False)
  84 def public_read(request, v_public):
  85     # Normal Response Codes: 200, 206
  86     # Error Response Codes: internalServerError (500),
  87     #                       rangeNotSatisfiable (416),
  88     #                       preconditionFailed (412),
  89     #                       itemNotFound (404),
  90     #                       badRequest (400),
  91     #                       notModified (304)
  92
  93     try:
  94         v_account, v_container, v_object = request.backend.get_public(request.user_uniq,
  95                                                     decode_url(v_public))
  96         meta = request.backend.get_object_meta(request.user_uniq, v_account,
  97                                                     v_container, v_object, 'pithos')
  98         public = request.backend.get_object_public(request.user_uniq, v_account,
  99                                                     v_container, v_object)
 100     except:
 101         raise ItemNotFound('Object does not exist')
 102
 103     if not public:
 104         raise ItemNotFound('Object does not exist')
 105     update_manifest_meta(request, v_account, meta)
 106
 107     # Evaluate conditions.
 108     validate_modification_preconditions(request, meta)
 109     try:
 110         validate_matching_preconditions(request, meta)
 111     except NotModified:
 112         response = HttpResponse(status=304)
 113         response['ETag'] = meta['ETag']
 114         return response
 115
 116     sizes = []
 117     hashmaps = []
 118     if 'X-Object-Manifest' in meta:
 119         try:
 120             src_container, src_name = split_container_object_string('/' + meta['X-Object-Manifest'])
 121             objects = request.backend.list_objects(request.user_uniq, v_account,
 122                                 src_container, prefix=src_name, virtual=False)
 123         except:
 124             raise ItemNotFound('Object does not exist')
 125
 126         try:
 127             for x in objects:
 128                 s, h = request.backend.get_object_hashmap(request.user_uniq,
 129                                         v_account, src_container, x[0], x[1])
 130                 sizes.append(s)
 131                 hashmaps.append(h)
 132         except:
 133             raise ItemNotFound('Object does not exist')
 134     else:
 135         try:
 136             s, h = request.backend.get_object_hashmap(request.user_uniq, v_account,
 137                                                         v_container, v_object)
 138             sizes.append(s)
 139             hashmaps.append(h)
 140         except:
 141             raise ItemNotFound('Object does not exist')
 142
 143     if 'Content-Disposition' not in meta:
 144         name = v_object.rstrip('/').split('/')[-1]
 145         if not name:
 146             name = v_public
 147         meta['Content-Disposition'] = 'attachment; filename=%s' % (name,)
 148
 149     return object_data_response(request, sizes, hashmaps, meta, True)
 150
 151 @api_method(user_required=False)
 152 def method_not_allowed(request, **v_args):
 153     raise ItemNotFound('Object does not exist')