python/google/appengine/api/images/images_blob_stub.py

   1 #!/usr/bin/env python
   2 #
   3 # Copyright 2007 Google Inc.
   4 #
   5 # Licensed under the Apache License, Version 2.0 (the "License");
   6 # you may not use this file except in compliance with the License.
   7 # You may obtain a copy of the License at
   8 #
   9 #     http://www.apache.org/licenses/LICENSE-2.0
  10 #
  11 # Unless required by applicable law or agreed to in writing, software
  12 # distributed under the License is distributed on an "AS IS" BASIS,
  13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  14 # See the License for the specific language governing permissions and
  15 # limitations under the License.
  16 #
  17
  18
  19
  20
  21 """Stub version of the blob-related parts of the images API."""
  22
  23
  24
  25
  26
  27
  28 import logging
  29
  30 from google.appengine.api import datastore
  31
  32
  33 BLOB_SERVING_URL_KIND = '__BlobServingUrl__'
  34
  35
  36 class ImagesBlobStub(object):
  37   """Stub version of the blob-related parts of the images API."""
  38
  39   def __init__(self, host_prefix):
  40     """Stub implementation of blob-related parts of the images API.
  41
  42     Args:
  43       host_prefix: string - The URL prefix (protocol://host:port) to prepend to
  44         image URLs on a call to GetUrlBase.
  45     """
  46     self._host_prefix = host_prefix
  47
  48   def GetUrlBase(self, request, response):
  49     """Trivial implementation of an API call.
  50
  51     Args:
  52       request: ImagesGetUrlBaseRequest - Contains a blobkey to an image.
  53       response: ImagesGetUrlBaseResponse - Contains a URL to serve the image.
  54     """
  55     if request.create_secure_url():
  56       logging.info('Secure URLs will not be created using the development '
  57                    'application server.')
  58
  59     entity_info = datastore.Entity(
  60         BLOB_SERVING_URL_KIND, name=request.blob_key(), namespace='')
  61     entity_info['blob_key'] = request.blob_key()
  62     datastore.Put(entity_info)
  63
  64     response.set_url('%s/_ah/img/%s' % (self._host_prefix, request.blob_key()))
  65
  66   def DeleteUrlBase(self, request, unused_response):
  67     """Trivial implementation of an API call.
  68
  69     Args:
  70       request: ImagesDeleteUrlBaseRequest - Contains a blobkey to an image.
  71       unused_response: ImagesDeleteUrlBaseResponse - Unused.
  72     """
  73     key = datastore.Key.from_path(
  74         BLOB_SERVING_URL_KIND, request.blob_key(), namespace='')
  75     datastore.Delete(key)