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Commit 804f4a9

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author
Jeff Mendoza
committed
Merge pull request GoogleCloudPlatform#40 from GoogleCloudPlatform/jlm/appengine-images
Move sample using appengine images to this repository, add tests.
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‎appengine/images/README.md

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## Images Guestbook Sample
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This is a sample app for Google App Engine that exercises the [images
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Python
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API](https://cloud.google.com/appengine/docs/python/images/usingimages).
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See our other [Google Cloud Platform github
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repos](https://github.com/GoogleCloudPlatform) for sample applications
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and scaffolding for other python frameworks and use cases.
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## Run Locally
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1. Install the [Google Cloud SDK](https://cloud.google.com/sdk/),
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including the [gcloud tool](https://cloud.google.com/sdk/gcloud/),
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and [gcloud app
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component](https://cloud.google.com/sdk/gcloud-app).
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1. Setup the gcloud tool.
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```
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gcloud components update app
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gcloud auth login
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gcloud config set project <your-app-id>
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```
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You don't need a valid app-id to run locally, but will need a valid id
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to deploy below.
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1. Clone this repo.
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```
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git clone https://github.com/GoogleCloudPlatform/python-docs-samples.git
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cd appengine/images/
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```
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1. Run this project locally from the command line.
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```
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gcloud preview app run ./app.yaml
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```
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1. Visit the application at
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[http://localhost:8080](http://localhost:8080).
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## Deploying
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1. Use the [Cloud Developer
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Console](https://console.developer.google.com) to create a
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project/app id. (App id and project id are identical)
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1. Configure gcloud with your app id.
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```
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gcloud config set project <your-app-id>
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```
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1. Use the [Admin Console](https://appengine.google.com) to view data,
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queues, and other App Engine specific administration tasks.
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1. Use gcloud to deploy your app.
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```
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gcloud preview app deploy ./app.yaml
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```
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1. Congratulations! Your application is now live at your-app-id.appspot.com
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## Contributing changes
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* See [CONTRIBUTING.md](/CONTRIBUTING.md)
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## Licensing
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* See [LICENSE](/LICENSE)

‎appengine/images/__init__.py

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‎appengine/images/app.yaml

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# This file specifies your Python application's runtime configuration
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# including URL routing, versions, static file uploads, etc. See
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# https://developers.google.com/appengine/docs/python/config/appconfig
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# for details.
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runtime: python27
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api_version: 1
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threadsafe: yes
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# Handlers define how to route requests to your application.
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handlers:
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# This handler tells app engine how to route requests to a WSGI application.
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# The script value is in the format <path.to.module>.<wsgi_application>
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# where <wsgi_application> is a WSGI application object.
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- url: .* # This regex directs all routes to main.app
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script: main.app

‎appengine/images/favicon.ico

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‎appengine/images/index.yaml

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indexes:
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# AUTOGENERATED
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# This index.yaml is automatically updated whenever the dev_appserver
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# detects that a new type of query is run. If you want to manage the
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# index.yaml file manually, remove the above marker line (the line
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# saying "# AUTOGENERATED"). If you want to manage some indexes
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# manually, move them above the marker line. The index.yaml file is
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# automatically uploaded to the admin console when you next deploy
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# your application using appcfg.py.
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- kind: Greeting
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ancestor: yes
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properties:
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- name: date
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direction: desc

‎appengine/images/main.py

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# Copyright 2015 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# [START all]
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import cgi
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import urllib
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# [START import_images]
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from google.appengine.api import images
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# [END import_images]
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from google.appengine.api import users
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from google.appengine.ext import ndb
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import webapp2
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# [START model]
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class Greeting(ndb.Model):
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"""Models a Guestbook entry with an author, content, avatar, and date."""
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author = ndb.StringProperty()
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content = ndb.TextProperty()
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avatar = ndb.BlobProperty()
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date = ndb.DateTimeProperty(auto_now_add=True)
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# [END model]
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def guestbook_key(guestbook_name=None):
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"""Constructs a Datastore key for a Guestbook entity with name."""
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return ndb.Key('Guestbook', guestbook_name or 'default_guestbook')
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class MainPage(webapp2.RequestHandler):
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def get(self):
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self.response.out.write('<html><body>')
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guestbook_name = self.request.get('guestbook_name')
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greetings = Greeting.query(
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ancestor=guestbook_key(guestbook_name)) \
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.order(-Greeting.date) \
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.fetch(10)
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for greeting in greetings:
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if greeting.author:
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self.response.out.write(
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'<b>%s</b> wrote:' % greeting.author)
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else:
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self.response.out.write('An anonymous person wrote:')
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# [START display_image]
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self.response.out.write('<div><img src="/img?img_id=%s"></img>' %
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greeting.key.urlsafe())
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self.response.out.write('<blockquote>%s</blockquote></div>' %
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cgi.escape(greeting.content))
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# [END display_image]
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# [START form]
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self.response.out.write("""
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<form action="/sign?%s"
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enctype="multipart/form-data"
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method="post">
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<div>
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<textarea name="content" rows="3" cols="60"></textarea>
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</div>
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<div><label>Avatar:</label></div>
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<div><input type="file" name="img"/></div>
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<div><input type="submit" value="Sign Guestbook"></div>
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</form>
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<hr>
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<form>Guestbook name: <input value="%s" name="guestbook_name">
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<input type="submit" value="switch"></form>
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</body>
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</html>""" % (urllib.urlencode({'guestbook_name': guestbook_name}),
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cgi.escape(guestbook_name)))
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# [END form]
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# [START image_handler]
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class Image(webapp2.RequestHandler):
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def get(self):
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greeting_key = ndb.Key(urlsafe=self.request.get('img_id'))
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greeting = greeting_key.get()
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if greeting.avatar:
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self.response.headers['Content-Type'] = 'image/png'
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self.response.out.write(greeting.avatar)
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else:
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self.response.out.write('No image')
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# [END image_handler]
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# [START sign_handler]
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class Guestbook(webapp2.RequestHandler):
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def post(self):
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guestbook_name = self.request.get('guestbook_name')
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greeting = Greeting(parent=guestbook_key(guestbook_name))
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if users.get_current_user():
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greeting.author = users.get_current_user().nickname()
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greeting.content = self.request.get('content')
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# [START sign_handler_1]
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avatar = self.request.get('img')
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# [END sign_handler_1]
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# [START transform]
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avatar = images.resize(avatar, 32, 32)
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# [END transform]
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# [START sign_handler_2]
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greeting.avatar = avatar
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greeting.put()
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# [END sign_handler_1]
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self.redirect('/?' + urllib.urlencode(
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{'guestbook_name': guestbook_name}))
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# [END sign_handler]
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app = webapp2.WSGIApplication([('/', MainPage),
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('/img', Image),
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('/sign', Guestbook)],
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debug=True)
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# [END all]

‎appengine/images/tests/__init__.py

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‎appengine/images/tests/test_guestbook.py

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# Copyright 2015 Google Inc. All rights reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# from the app main.py
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from appengine.images import main
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import mock
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from tests import DatastoreTestbedCase
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import webapp2
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class TestHandlers(DatastoreTestbedCase):
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def test_get(self):
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# Build a request object passing the URI path to be tested.
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# You can also pass headers, query arguments etc.
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request = webapp2.Request.blank('/')
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# Get a response for that request.
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response = request.get_response(main.app)
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# Let's check if the response is correct.
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self.assertEqual(response.status_int, 200)
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@mock.patch('appengine.images.main.images')
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def test_post(self, mock_images):
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mock_images.resize.return_value = 'asdf'
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request = webapp2.Request.blank(
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'/sign',
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POST={'content': 'asdf'},
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)
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response = request.get_response(main.app)
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mock_images.resize.assert_called_once()
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# Correct response is a redirect
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self.assertEqual(response.status_int, 302)
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def test_img(self):
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greeting = main.Greeting(
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parent=main.guestbook_key('default_guestbook'),
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id=123,
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)
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greeting.author = 'asdf'
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greeting.content = 'asdf'
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greeting.put()
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request = webapp2.Request.blank(
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'/img?img_id=%s' % greeting.key.urlsafe()
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)
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response = request.get_response(main.app)
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self.assertEqual(response.status_int, 200)
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def test_img_missing(self):
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# Bogus image id, should get error
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request = webapp2.Request.blank('/img?img_id=123')
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response = request.get_response(main.app)
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self.assertEqual(response.status_int, 500)
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@mock.patch('appengine.images.main.images')
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def test_post_and_get(self, mock_images):
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mock_images.resize.return_value = 'asdf'
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request = webapp2.Request.blank(
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'/sign',
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POST={'content': 'asdf'},
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)
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response = request.get_response(main.app)
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request = webapp2.Request.blank('/')
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response = request.get_response(main.app)
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self.assertEqual(response.status_int, 200)

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