Added blobstore image example (#291)

appengine/images/api/blobstore.py

@@ -0,0 +1,52 @@
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Sample application that demonstrates how to use the App Engine Images API.
+
+For more information, see README.md.
+"""
+
+# [START all]
+# [START thumbnailer]
+from google.appengine.api import images
+from google.appengine.ext import blobstore
+
+import webapp2
+
+
+class Thumbnailer(webapp2.RequestHandler):
+    def get(self):
+        blob_key = self.request.get("blob_key")
+        if blob_key:
+            blob_info = blobstore.get(blob_key)
+
+            if blob_info:
+                img = images.Image(blob_key=blob_key)
+                img.resize(width=80, height=100)
+                img.im_feeling_lucky()
+                thumbnail = img.execute_transforms(output_encoding=images.JPEG)
+
+                self.response.headers['Content-Type'] = 'image/jpeg'
+                self.response.out.write(thumbnail)
+                return
+
+        # Either "blob_key" wasn't provided, or there was no value with that ID
+        # in the Blobstore.
+        self.error(404)
+# [END thumbnailer]
+
+
+app = webapp2.WSGIApplication([('/img', Thumbnailer)], debug=True)
+# [END all]

appengine/images/api/blobstore_test.py

@@ -0,0 +1,45 @@
+# Copyright 2015 Google Inc. All rights reserved.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+import blobstore
+import mock
+import pytest
+import webtest
+
+
+@pytest.fixture
+def app(testbed):
+    return webtest.TestApp(blobstore.app)
+
+
+def test_img(app):
+    with mock.patch('blobstore.images') as mock_images:
+        with mock.patch('blobstore.blobstore') as mock_blobstore:
+            mock_blobstore.get.return_value = b'123'
+            mock_images.resize.return_value = 'asdf'
+            mock_images.im_feeling_lucky.return_value = 'gsdf'
+
+            response = app.get('/img?blob_key=123')
+
+            assert response.status_int == 200
+
+
+def test_img_missing(app):
+    # Bogus blob_key, should get error
+    app.get('/img?blob_key=123', status=404)
+
+
+def test_no_img_id(app):
+    # No blob_key, should get error
+    app.get('/img', status=404)

appengine/images/api/main_test.py

@@ -45,5 +45,5 @@ def test_img_missing(app):
 
 
 def test_no_img_id(app):
-    # Bogus image id, should get error
+    # No image id, should get error
     app.get('/img', status=404)