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   <form method='POST' action='http://upload.example.com' enctype='multipart/form-data' id='form'>
        <input type='file' />
        <input type='submit' />
      </form>

      <script>
        var io = new goog.net.IframeIo;
        goog.events.listen (io, goog.net.EventType.COMPLETE,
        function (event) {
          alert(event.target.getResponseText ());

sahid

class User (db.model):
  name = db.StringProperty ()
  prop = db.IntergerPeroperty ()

class Presence (db.model):
  user = db.ReferenceProperty (User)
  last = db.DateTimeProperty ()

# Keys users onlines
presences     = Presence.all ().filter ('last >', date_considered_connected)

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## Models.py
class Message (MarkDeleted):
    uuid    = db.StringProperty (required=True)
    owner   = db.ReferenceProperty (Actor, collection_name="message_owner", required=True)
    target  = db.ReferenceProperty (Actor, collection_name="message_target", required=True)

    entry  = db.ReferenceProperty (Entry, required=True)
    reply  = db.SelfReferenceProperty ()

    label  = db.StringProperty (choices=MESSAGE_LABEL, required=True)

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def query_counter (q, cursor=None, limit=500):
    if cursor:
        q.with_cursor (cursor)
    count = q.count (limit=limit)
    if count == limit:
        return count + query_counter (q, q.cursor (), limit=limit)
    return count

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def prefetch_refprops(entities, *props):
    fields = [(entity, prop) for entity in entities for prop in props]
    ref_keys = [prop.get_value_for_datastore(x) for x, prop in fields]

    # Because if ref_keys has a None value,                                                                                                                                                            
    # db.get raise a BadArgumentError exception.                                                                                                                                                       
    for (i, v) in enumerate (ref_keys):
        if v is None:
            del ref_keys[i]
            del fields[i]

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import logging

from google.appengine.api import memcache

from django.conf import settings
from django import template


class HTMLListNode (template.Node):
    """ Create or reuse all node of the template.                                                                                                                                 

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# Largely inspired by: http://blog.notdot.net/2009/9/Efficient-model-memcaching

def serialize(models):
    if isinstance(models, db.Model):
        return db.model_to_protobuf(models).Encode()
    elif isinstance(models, list):
        return [serialize(x) for x in models]
    elif isinstance(models, dict):
	return dict([(k, serialize(x)) for k, x in models.items()])

sahid

import os
import logging

from google.appengine.ext import db
from google.appengine.api import datastore
from google.appengine.datastore import datastore_rpc

def async_put(entities, **kwargs):
  config = datastore.CreateConfig(**kwargs)
  entities, _ = datastore.NormalizeAndTypeCheck(entities, db.Model)

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import logging
import time

from google.appengine.runtime import apiproxy_errors
from google.appengine.ext import db

DATASTORE_NB_RETRY=5
DATASTORE_TIME_RETRY=.15
DATASTORE_DEFAULT_DEADLINE=5
DATASTORE_DEFAULT_CFG=db.create_config(

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class CapabilityDatastore (object):
    def process_request (self, request):
        datastore_write = CapabilitySet('datastore_v3', capabilities=['write'])
        if not datastore_write.is_enabled():
            return views.common_capability(request)