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executable file 89 lines (67 sloc) 2.65 KB
#!/usr/bin/env python
import wsgiref.handlers
import urllib2
import logging
import os
import sys
import traceback
from google.appengine.ext import webapp
from google.appengine.api import memcache
from google.appengine.ext.webapp import template
from django.utils import simplejson as json
# pytz imports itself, so this is necessary
sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), 'utils', 'external')))
from models.alert import Alert
from models.place import Place
from models import InvalidPlace
from utils.encoder import PlaceEncoder
class AlertHandler(webapp.RequestHandler):
PLACE_KEY = "/%s/place/"
ALERT_KEY = "/%s/alert/"
def get(self):
place_name = self.request.get("p", None)
callback = self.request.get("callback", None)
if not place_name:
raise InvalidPlace(" ")
elif place_name == "favicon.ico":
""" This happens so often, it's annoying. """
self.response.set_status(204)
else:
place_name = urllib2.unquote(place_name)
p = memcache.get(self.PLACE_KEY % place_name)
if not p:
p = Place(place_name)
memcache.set(self.PLACE_KEY % place_name, p) # cache indefinitely
alerts = memcache.get(self.ALERT_KEY % place_name)
if not alerts:
alerts = Alert.alerts_for(p)
try:
memcache.set(self.ALERT_KEY % place_name, alerts, time=10) # cache a SHORT time
except:
logging.error('Error setting memcache.')
logging.error(''.join(traceback.format_exception(*sys.exc_info())))
p.alerts = alerts
javascript = json.dumps(p, sort_keys=True, indent=2, cls=PlaceEncoder)
self.response.headers['Content-Type'] = 'text/javascript'
self.response.out.write("%s(%s)" % (callback, javascript) if callback else javascript)
def handle_exception(self, exception, debug_mode=False):
logging.error(''.join(traceback.format_exception(*sys.exc_info())))
if hasattr(exception, "code"):
status = exception.code
message = exception.msg
else:
status = 500
message = "An Unknown Error Occurred."
self.response.set_status(status)
self.response.headers['Content-Type'] = 'text/javascript'
self.response.out.write(json.dumps({'error': message}))
class MainHandler(webapp.RequestHandler):
def get(self):
index = os.path.join(os.path.dirname(__file__), 'views', 'index.html')
self.response.out.write(template.render(index, {}))
def main():
application = webapp.WSGIApplication([('/alerts.json', AlertHandler), ('/', MainHandler)],
debug=True)
wsgiref.handlers.CGIHandler().run(application)
if __name__ == '__main__':
main()