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
  29 import logging
  30
  31 from google.appengine.api import datastore
  32
  33
  34
  35
  36
  37 BLOB_SERVING_URL_KIND = "__BlobServingUrl__"
  38
  39
  40 class ImagesBlobStub(object):
  41   """Stub version of the blob-related parts of the images API."""
  42
  43   def __init__(self, host_prefix):
  44     """Stub implementation of blob-related parts of the images API.
  45
  46     Args:
  47       host_prefix: the URL prefix (protocol://host:port) to preprend to
  48         image urls on a call to GetUrlBase.
  49     """
  50     self._host_prefix = host_prefix
  51
  52   def GetUrlBase(self, request, response):
  53     """Trivial implementation of ImagesService::GetUrlBase.
  54
  55     Args:
  56       request: ImagesGetUrlBaseRequest, contains a blobkey to an image
  57       response: ImagesGetUrlBaseResponse, contains a url to serve the image
  58     """
  59     if request.create_secure_url():
  60       logging.info("Secure URLs will not be created using the development "
  61                    "application server.")
  62
  63     entity_info = datastore.Entity(BLOB_SERVING_URL_KIND,
  64                                    name=request.blob_key(),
  65                                    namespace="")
  66     entity_info["blob_key"] = request.blob_key()
  67     datastore.Put(entity_info)
  68
  69     response.set_url("%s/_ah/img/%s" % (self._host_prefix, request.blob_key()))
  70
  71   def DeleteUrlBase(self, request, response):
  72     """Trivial implementation of ImagesService::DeleteUrlBase.
  73
  74     Args:
  75       request: ImagesDeleteUrlBaseRequest, contains a blobkey to an image.
  76       response: ImagesDeleteUrlBaseResonse - currently unused.
  77     """
  78     key = datastore.Key.from_path(BLOB_SERVING_URL_KIND,
  79                                   request.blob_key(),
  80                                   namespace="")
  81     datastore.Delete(key)