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sm.py
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sm.py
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# -*- coding: utf-8 -*-
'Simulation modeling' # Имя приложения
# GAE API и стандартные модули
import logging
from google.appengine.ext import webapp
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.runtime import DeadlineExceededError
# Модули приложения
import models, tree, view
from models import aggregator
class Handler(webapp.RequestHandler):
def _handle_exception(self, exception, debug_mode):
logging.error(exception)
self.response.clear()
self.response.set_status(500)
self.response.out.write(view.internal_error())
class MainPage(Handler):
'Список моделей'
def get(self):
self.response.headers['Content-Type'] = 'text/html'
# Список моделей
names = {}
for name in models.__all__:
names[name] = getattr(__import__('models.' + name, fromlist = ['models']), name).__doc__
self.response.out.write(view.index(names))
class Model(Handler):
'Модель'
def request(self, name):
self.response.headers['Content-Type'] = 'text/html'
# Загрузка модели
model = getattr(__import__('models.' + name, fromlist=['models']), name)
title = model.__doc__
# Загрузка формы
ModelForm = getattr(__import__('forms.' + name, fromlist=['forms']), 'ModelForm')
# Загрузка представления
try:
show = getattr(view, name)
except:
show = view.model
# Входной запрос
query = self.request.POST or self.request.GET
form = ModelForm(query)
if not query:
# Выводим пустую форму. Никаких расчётов, просто запрос view.
self.response.out.write(show(name, title, form=form))
else:
# Проводим валидацию запроса.
if form.validate(): # Ошибок нет. Вызываем модель.
try:
output = aggregator.aggregator(model, form.data)
except DeadlineExceededError:
logging.error('Deadline exceeded error.')
self.response.set_status(500)
self.response.out.write(view.internal_error())
else:
query_pairs = ('%s=%s' % (item, value) for item, value in query.items())
query_string = '&'.join(query_pairs)
self.response.out.write(show(name, title, form=form, output=output, query=query_string))
else:
self.response.out.write(show(name, title, form=form))
get = post = request
class Help(Handler):
'Справочная система'
def get(self, name):
self.response.headers['Content-Type'] = 'text/html'
model = getattr(__import__('models.' + name, fromlist=['models']), name)
title = model.__doc__
self.response.out.write(view.help(name, title))
class UrlShortener(Handler):
'Обёртка для goo.gl API'
def get(self, model):
'Сокращение URL'
# Получение URL модели, который должен быть сокращён
host = self.request.host_url
args = self.request.query
url = '%s/%s?%s' % (host, model, args)
# Вызов goo.gl
from google.appengine.api import urlfetch
result = urlfetch.fetch(
url = 'https://www.googleapis.com/urlshortener/v1/url?key=AIzaSyCmKtYt1GL8F-9XXnywAHs2JzgMhm0OHzU',
method = urlfetch.POST,
payload = u'{ "longUrl" : "%s" }' % url,
headers = {
'Content-Type' : 'application/json',
}
)
if result.status_code == 200:
response = result.content
else:
raise Exception(result.status_code)
# Парсинг
from django.utils import simplejson as json
shortUrl = json.loads(response)['id']
self.response.headers['Content-Type'] = 'text/html'
self.response.out.write(view.shorten(shortUrl))
class NotFound(Handler):
'Страница не найдена'
def get(self, url):
self.response.clear()
self.response.set_status(404)
logging.error('Page "%s" was not found.' % url)
self.response.out.write(view.notfound())
# Определение списка страниц
model_list = '|'.join(models.__all__)
routes = [
('/', MainPage),
('^/url/(%s)/*' % model_list, UrlShortener),
('^/help/(%s)/*' % model_list, Help),
('^/(%s)/*' % model_list, Model),
('^/*$', MainPage),
('^(.*)$', NotFound),
]
# Запуск приложения
application = webapp.WSGIApplication(routes, debug=True)
def main():
run_wsgi_app(application)
if __name__ == "__main__":
main()