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main.py
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"""A simple guestbook app to test parts of NDB end-to-end."""
import cgi
import logging
import re
import sys
import time
from google.appengine.api import urlfetch
from google.appengine.api import users
from google.appengine.datastore import entity_pb
from webapp2 import webapp2
#from google.appengine.ext import webapp
from google.appengine.ext.webapp import util
from google.appengine.datastore import datastore_query
from google.appengine.datastore import datastore_rpc
from ndb import context
from ndb import eventloop
from ndb import model
from ndb import tasklets
HOME_PAGE = """
<script>
function focus() {
textarea = document.getElementById('body');
textarea.focus();
}
</script>
<body onload=focus()>
Nickname: <a href="/account">%(nickname)s</a> |
<a href="%(login)s">login</a> |
<a href="%(logout)s">logout</a>
<form method=POST action=/>
<!-- TODO: XSRF protection -->
<input type=text id=body name=body size=60>
<input type=submit>
</form>
</body>
"""
ACCOUNT_PAGE = """
<body>
Nickname: <a href="/account">%(nickname)s</a> |
<a href="%(logout)s">logout</a>
<form method=POST action=/account>
<!-- TODO: XSRF protection -->
Email: %(email)s<br>
New nickname:
<input type=text name=nickname size=20 value=%(proposed_nickname)s><br>
<input type=submit name=%(action)s value="%(action)s Account">
<input type=submit name=delete value="Delete Account">
<a href=/>back to home page</a>
</form>
</body>
"""
class Concept(model.Model):
"""Concept"""
id = model.IntegerProperty()
effective_time = model.DateTimeProperty()# server_default="CURRENT_TIMESTAMP")
active = model.BooleanProperty()# default=True)
module_id = model.IntegerProperty()#default='900000000001234567')
definition_status_id = model.IntegerProperty()# default=900000000000130009)
class Description(model.Model):
id = model.IntegerProperty()
effective_time = model.DateTimeProperty() #server_default="CURRENT_TIMESTAMP")
active = model.BooleanProperty()# default=True)
module_id = model.IntegerProperty()# default='900000000001234567')
concept_id = model.IntegerProperty()# can't be null
language_code = model.StringProperty()#length=8 ISO-639-1 code.
type_id = model.IntegerProperty()#default=S.DESCRIPTION.SYNONYM)
term = model.StringProperty()
case_significance_id = model.IntegerProperty()# default=None)
#full_concept = relationship('Concept', backref='descriptions', primaryjoin="Description.concept_id==Concept.id")
class Relationship(model.Model):
id = model.IntegerProperty()
effective_time = model.DateTimeProperty() # server_default="CURRENT_TIMESTAMP")
active = model.BooleanProperty()# default=True)
module_id = model.IntegerProperty()# default='900000000001234567')
source_id = model.IntegerProperty()# default=None)
destination_id = model.IntegerProperty()# default=None)
group = model.IntegerProperty()# default=0)
type_id = model.IntegerProperty()# default='116680003')
modifier_id = model.IntegerProperty()# default=None)
characteristic_type_id = model.IntegerProperty()# default='0')
class RefSet(model.Model):
id = model.StringProperty()#uuid
effective_time = model.DateTimeProperty() # server_default="CURRENT_TIMESTAMP")
active = model.BooleanProperty()# default=True)
module_id = model.IntegerProperty()# default='900000000001234567')
ref_set_id = model.IntegerProperty()# default=None)
referenced_component_id = model.IntegerProperty()# default=None)
data =model.BlobProperty()#
class Account(model.Model):
"""User account."""
email = model.StringProperty()
userid = model.StringProperty()
nickname = model.StringProperty()
class Message(model.Model):
"""Guestbook message."""
body = model.StringProperty()
when = model.FloatProperty()
userid = model.StringProperty()
class UrlSummary(model.Model):
"""Metadata about a URL."""
MAX_AGE = 60
url = model.StringProperty()
title = model.StringProperty()
when = model.FloatProperty()
def account_key(userid):
return model.Key(flat=['Account', userid])
def get_account(userid):
"""Return a Future for an Account."""
return account_key(userid).get_async()
@tasklets.tasklet
def get_nickname(userid):
"""Return a Future for a nickname from an account."""
account = yield get_account(userid)
if not account:
nickname = 'Unregistered'
else:
nickname = account.nickname or account.email
raise tasklets.Return(nickname)
class HomePage(webapp2.RequestHandler):
@context.toplevel
def get(self):
nickname = 'Anonymous'
user = users.get_current_user()
if user is not None:
nickname = yield get_nickname(user.user_id())
values = {'nickname': nickname,
'login': users.create_login_url('/'),
'logout': users.create_logout_url('/'),
}
self.response.out.write(HOME_PAGE % values)
qry, options = self._make_query()
pairs = yield qry.map_async(self._hp_callback, options=options)
for key, text in pairs:
self.response.out.write(text)
def _make_query(self):
qry = Message.query().order(-Message.when)
options = datastore_query.QueryOptions(batch_size=13, limit=43)
return qry, options
@tasklets.tasklet
def _hp_callback(self, message):
nickname = 'Anonymous'
if message.userid:
nickname = yield get_nickname(message.userid)
# Check if there's an URL.
body = message.body
m = re.search(r'(?i)\bhttps?://\S+[^\s.,;\]\}\)]', body)
if not m:
escbody = cgi.escape(body)
else:
url = m.group()
pre = body[:m.start()]
post = body[m.end():]
title = ''
key = model.Key(flat=[UrlSummary.GetKind(), url])
summary = yield key.get_async()
if not summary or summary.when < time.time() - UrlSummary.MAX_AGE:
rpc = urlfetch.create_rpc(deadline=0.5)
urlfetch.make_fetch_call(rpc, url,allow_truncated=True)
t0 = time.time()
result = yield rpc
t1 = time.time()
logging.warning('url=%r, status=%r, dt=%.3f',
url, result.status_code, t1-t0)
if result.status_code == 200:
bodytext = result.content
m = re.search(r'(?i)<title>([^<]+)</title>', bodytext)
if m:
title = m.group(1).strip()
summary = UrlSummary(key=key, url=url, title=title,
when=time.time())
yield summary.put_async()
hover = ''
if summary.title:
hover = ' title="%s"' % summary.title
escbody = (cgi.escape(pre) +
'<a%s href="%s">' % (hover, cgi.escape(url)) +
cgi.escape(url) + '</a>' + cgi.escape(post))
text = '%s - %s - %s<br>' % (cgi.escape(nickname),
time.ctime(message.when),
escbody)
raise tasklets.Return((-message.when, text))
@context.toplevel
def post(self):
# TODO: XSRF protection.
body = self.request.get('body', '').strip()
if body:
userid = None
user = users.get_current_user()
if user:
userid = user.user_id()
message = Message(body=body, when=time.time(), userid=userid)
yield message.put_async()
self.redirect('/')
class AccountPage(webapp2.RequestHandler):
@context.toplevel
def get(self):
user = users.get_current_user()
if not user:
self.redirect(users.create_login_url('/account'))
return
email = user.email()
action = 'Create'
account, nickname = yield (get_account(user.user_id()),
get_nickname(user.user_id()))
if account is not None:
action = 'Update'
if account:
proposed_nickname = account.nickname or account.email
else:
proposed_nickname = email
values = {'email': email,
'nickname': nickname,
'proposed_nickname': proposed_nickname,
'login': users.create_login_url('/'),
'logout': users.create_logout_url('/'),
'action': action,
}
self.response.out.write(ACCOUNT_PAGE % values)
@context.toplevel
def post(self):
# TODO: XSRF protection.
@tasklets.tasklet
def helper():
user = users.get_current_user()
if not user:
self.redirect(users.create_login_url('/account'))
return
account = yield get_account(user.user_id())
if self.request.get('delete'):
if account:
yield account.key.delete_async()
self.redirect('/account')
return
if not account:
account = Account(key=account_key(user.user_id()),
email=user.email(), userid=user.user_id())
nickname = self.request.get('nickname')
if nickname:
account.nickname = nickname
yield account.put_async()
self.redirect('/account')
yield model.transaction_async(helper)
urls = [
('/', HomePage),
('/account', AccountPage),
]
app = webapp2.WSGIApplication(urls)
def main():
util.run_wsgi_app(app)
if __name__ == '__main__':
main()
#
#
#class HomeHandler(webapp2.RequestHandler):
# def get(self, **kwargs):
# html = '<a href="%s">test item</a>' % self.url_for('view', item='test')
# self.response.out.write(html)
#
#
#class ViewHandler(webapp2.RequestHandler):
# def get(self, **kwargs):
# item = kwargs.get('item')
# self.response.out.write('You are viewing item "%s".' % item)
#
#
#class HandlerWithError(webapp2.RequestHandler):
# def get(self, **kwargs):
# raise ValueError('Oops!')
#
#
#def get_redirect_url(handler, **kwargs):
# return handler.url_for('view', item='i-came-from-a-redirect')
#
#
#app = webapp2.WSGIApplication([
# # Home sweet home.
# webapp2.Route('/', HomeHandler, name='home'),
# # A route with a named variable.
# webapp2.Route('/view/<item>', ViewHandler, name='view'),
# # Loads a handler lazily.
# webapp2.Route('/lazy', 'handlers.LazyHandler', name='lazy'),
# # Redirects to a given path.
# webapp2.Route('/redirect-me', webapp2.RedirectHandler, defaults={'url': '/lazy'}),
# # Redirects to a URL using a callable to get the destination URL.
# webapp2.Route('/redirect-me2', webapp2.RedirectHandler, defaults={'url': get_redirect_url}),
# # No exception should pass. If exceptions are not handled, a 500 page is displayed.
# webapp2.Route('/exception', HandlerWithError),
#])
#
#
#def main():
# app.run()
#
#
#if __name__ == '__main__':
# main()