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@jdstanhope
Created March 4, 2013 01:20
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Google App Engine example of inline image uploading using Python
application: inline-upload
version: 1
runtime: python27
api_version: 1
threadsafe: yes
handlers:
- url: /favicon\.ico
static_files: favicon.ico
upload: favicon\.ico
- url: .*
script: main.app
libraries:
- name: webapp2
version: "2.5.2"
- name: jinja2
version: "2.6"
<!DOCTYPE html>
<html>
<head>
<title>Inline Image Upload Test</title>
<script type="text/javascript">
function startUpload() {
document.getElementById('upload_progress').style.visibility = 'visible';
return true;
}
function showImage(id) {
var image = document.getElementById('upload_image');
image.style.visibility = 'visible';
image.src = '/image/' + id;
}
function stopUpload(success, imageId) {
var result = document.getElementById('upload_result');
result.style.visibility = 'visible';
if (success) {
showImage(imageId);
result.innerText = 'Upload Succeeded'
}
else {
result.innerText = 'Upload Failed'
}
document.getElementById('upload_progress').style.visibility = 'hidden';
return true;
}
</script>
<style>
.hidden {
visibility: hidden;
}
</style>
</head>
<body>
{% if user %}
<h5>Welcome {{ user.nickname() }} <a href="{{ logout }}"> [Log out]</a></h5>
{% else %}
<h5><a href="{{ login }}">Log in</a></h5>
{% endif %}
<h1>Inline Image Upload Test</h1>
<form action="/upload" method="post" enctype="multipart/form-data" target="upload_target" onsubmit="startUpload();">
<label for="file">Image</label>
<input type="file" name="file" id="file"/>
<input type="submit" name="action" value="Upload"/>
</form>
<div id="upload_progress" class="hidden">Uploading</div>
<div id="upload_result" class="hidden"></div>
<img id="upload_image" class="hidden"/>
<iframe id="upload_target" name="upload_target" src="#" style="width: 0 ;height: 0; border: 0 solid #fff"></iframe>
</body>
</html>
#!/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.
#
import httplib
import os
from google.appengine.api import users
from google.appengine.ext import db
import webapp2
import jinja2
root_dir = os.path.dirname(__file__)
search_paths = [os.path.join(root_dir, 'templates')]
env = jinja2.Environment(loader=jinja2.FileSystemLoader(search_paths))
class Image(db.Model):
name = db.StringProperty(indexed=True)
data = db.BlobProperty()
class MainHandler(webapp2.RequestHandler):
def get(self):
template = env.get_template('main.html')
context = {
'user': users.get_current_user(),
'login': users.create_login_url('/'),
'logout': users.create_logout_url('/'),
}
content = template.render(context)
self.response.write(content)
class UploadHandler(webapp2.RequestHandler):
def post(self):
field_storage = self.request.POST['file']
data = self.request.get('file')
template = env.get_template('upload.html')
if data is None:
content = template.render({'result': 'false'})
self.response.write(content)
else:
image = Image(name=field_storage.filename, data=data)
image.put()
content = template.render({'result': 'true', 'image_id': image.key().id()})
self.response.write(content)
class ImageHandler(webapp2.RequestHandler):
def get(self, image_id):
image = Image.get_by_id(int(image_id))
self.response.write(image.data)
routes = [webapp2.Route(r'/', MainHandler, name='main'),
webapp2.Route(r'/upload', UploadHandler, name='upload'),
webapp2.Route(r'/image/<image_id>', ImageHandler, name='image')]
app = webapp2.WSGIApplication(routes, debug=True)
<!DOCTYPE html>
<html>
<head>
<script language="javascript" type="text/javascript">
{% if result %}
window.top.window.stopUpload(true, {{ image_id }});
{% else %}
window.top.window.stopUpload(false);
{% endif %}
</script>
</head>
<body>
</body>
</html>
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