diff --git a/samples/storage_serviceaccount_appengine/app.yaml b/samples/storage_serviceaccount_appengine/app.yaml
new file mode 100644
index 0000000..88d00d5
--- /dev/null
+++ b/samples/storage_serviceaccount_appengine/app.yaml
@@ -0,0 +1,13 @@
+application: bucket-list-python
+version: 1
+runtime: python27
+threadsafe: no
+api_version: 1
+
+handlers:
+- url: /listing.xsl
+ static_files: listing.xsl
+ upload: listing.xsl
+
+- url: .*
+ script: main.py
diff --git a/samples/storage_serviceaccount_appengine/listing.xsl b/samples/storage_serviceaccount_appengine/listing.xsl
new file mode 100755
index 0000000..ba12ba4
--- /dev/null
+++ b/samples/storage_serviceaccount_appengine/listing.xsl
@@ -0,0 +1,32 @@
+
+
+
+
+
+
+
+
+
+ | Object Name |
+ Modification Time |
+ ETag |
+ Size |
+ Storage Class |
+
+
+
+ |
+ |
+ |
+ |
+ |
+
+
+
+
+
+
+
diff --git a/samples/storage_serviceaccount_appengine/main.py b/samples/storage_serviceaccount_appengine/main.py
new file mode 100644
index 0000000..738a109
--- /dev/null
+++ b/samples/storage_serviceaccount_appengine/main.py
@@ -0,0 +1,97 @@
+#!/usr/bin/env python
+#
+# Copyright 2007 Google Inc.
+#
+# 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.
+#
+"""This application produces formatted listings for Google Cloud
+ Storage buckets.
+
+It takes a bucket name in the URL path and does an HTTP GET on the
+corresponding Google Cloud Storage URL to obtain a listing of the
+bucket contents. For example, if this app is invoked with the URI
+http://bucket-list.appspot.com/foo, it would remove the bucket name
+'foo', append it to the Google Cloud Storage service URI and send
+a GET request to the resulting URI. The bucket listing is returned
+in an XML document, which is prepended with a reference to an XSLT
+style sheet for human readable presentation.
+
+More information about using Google App Engine apps and service accounts
+to call Google APIs can be found here:
+
+
+
+"""
+
+__author__ = 'marccohen@google.com (Marc Cohen)'
+
+import httplib2
+import logging
+import os
+import pickle
+import re
+
+from google.appengine.api import memcache
+from google.appengine.ext import webapp
+from google.appengine.ext.webapp import template
+from google.appengine.ext.webapp.util import run_wsgi_app
+from oauth2client.appengine import AppAssertionCredentials
+
+# Constants for the XSL stylesheet and the Google Cloud Storage URI.
+XSL = '\n\n';
+URI = 'http://commondatastorage.googleapis.com'
+
+# Obtain service account credentials and authorize HTTP connection.
+credentials = AppAssertionCredentials(
+ scope='https://www.googleapis.com/auth/devstorage.read_write')
+http = credentials.authorize(httplib2.Http(memcache))
+
+
+class MainHandler(webapp.RequestHandler):
+
+ def get(self):
+ try:
+ # Derive desired bucket name from path after domain name.
+ bucket = self.request.path
+ if bucket[-1] == '/':
+ # Trim final slash, if necessary.
+ bucket = bucket[:-1]
+ # Send HTTP request to Google Cloud Storage to obtain bucket listing.
+ resp, content = http.request(URI + bucket, "GET")
+ if resp.status != 200:
+ # If error getting bucket listing, raise exception.
+ err = 'Error: ' + str(resp.status) + ', bucket: ' + bucket + \
+ ', response: ' + str(content)
+ raise Exception(err)
+ # Edit returned bucket listing XML to insert a reference to our style
+ # sheet for nice formatting and send results to client.
+ content = re.sub('(