main.py

import os
import json
import motor
import tornado.web
import tornado.ioloop

from bson import json_util  # bson is installed along with pymongo
from tornado import gen


class IndexHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous
    @gen.engine
    def get(self):
        self.render('index.html')


class CrimeHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous
    @gen.engine
    def get(self):
        self.render('crime/index.html')


class VcHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous
    @gen.engine
    def get(self):
        self.render('vc/index.html')


class DBHandler(tornado.web.RequestHandler):
    def initialize(self, collection_name):
        self.collection_name = collection_name

    @tornado.web.asynchronous
    @gen.engine
    def get(self):
        db = self.settings['db']

        collection = db[self.collection_name]
        cursor = collection.find({}, fields={'_id': False}).sort('_id')

        data = yield motor.Op(cursor.to_list)

        response_str = json.dumps(data, default=json_util.default)

        self.set_header('Content-Type', 'application/json')
        self.write(response_str)
        self.finish()


if __name__ == '__main__':
    db = motor.MotorClient().open_sync().test

    app = tornado.web.Application(
        handlers=[(r'/', IndexHandler),
                  (r'/ndx', DBHandler, {'collection_name': 'ndx'}),
                  (r'/crime', CrimeHandler),
                  (r'/crimedb', DBHandler, {'collection_name': 'crime'}),
                  (r'/vc', VcHandler),
                  (r'/vcdb', DBHandler, {'collection_name': 'vc'})
                  ],
        static_path=os.path.join(os.path.dirname(__file__), "static"),
        debug=True, db=db)

    app.listen(8000)
    tornado.ioloop.IOLoop.instance().start()