tornado+websocket+mongodb实现在线视屏文字聊天

import redis
import tornado.httpserver
import tornado.ioloop
import tornado.web
from motor import motor_tornado
from tornado import websocket
from tornado.gen import coroutine

from conf import Config


class WebHandler(websocket.WebSocketHandler):
    # 在线用户dict
    all_user = {}

    def initialize(self, mongo, redis):
        self.mongo = mongo
        self.redis = redis

    @property
    def db(self):
        return self.mongo.get_database('rgc')

    @property
    def col(self):
        return self.db.get_collection('web')

    def check_origin(self, origin):
        return True  # 允许WebSocket的跨域请求

    @coroutine
    def on_message(self, message):
        #因为没有登录相关功能，每次传输都 用 # 拼接 发送者，消息，接受者
        resu = str.split(message, '#')

        name = resu[0]
        val = resu[1]
        to = resu[2]
        # 判断对方是否在线
        if 'name:{}'.format(to) not in list(self.all_user.keys()):
            self.write_message('Out Line')
            # 存储消息到db
            # if not self.redis.hget('name_list', '{}:{}'.format(name, to)):
            #     self.redis.hset('name_list', '{}:{}'.format(name, to), 1)
            self.col.insert({'name': '{}:{}'.format(name, to), 'msg': val})
        else:
            # 发送最新消息
            self.all_user['name:{}'.format(to)].write_message(val)

        # 检查是不是第一次上线
        if 'name:{}'.format(name) not in list(self.all_user.keys()):
            # 给自己发送历史消息
            his_one = self.col.find({'name': '{}:{}'.format(to, name)}, {'msg': 1, '_id': 0})
            for it in (yield his_one.to_list(100)):
                self.write_message(it['msg'])
        # 删除历史消息
        self.col.delete_many({'name': '{}:{}'.format(to, name)})
        # 单点登录聊天
        self.all_user.update({'name:{}'.format(name): self})
        # 发给自己
        self.write_message('send success')

    def open(self):
        pass

    def on_close(self):
        # 当客户端关闭连接时，去除内存中保存的用户，让其离线
        key = None
        for k, v in self.all_user.items():
            if v == self:
                key = k
                break
        if key:
            self.all_user.pop(key)
        print('{} out line'.format(key))


class HtmlHandler(tornado.web.RequestHandler):
    def get(self):
        self.render("static/index.html")


class StaticHandler(tornado.web.RequestHandler):
    def get(self, file_url):
        self.render("static/{}".format(file_url))


def make_app():
    settings = {'cookie_secret': 'dfdfdfd',
                'xsrf_cookies': True,
                'debug': True}
    other_db = {'mongo': motor_tornado.MotorClient(**Config.get('MONGO_CONF')),
                'redis': redis.StrictRedis()}
    return tornado.web.Application([
        (r'/web', WebHandler, other_db),
        (r'/', HtmlHandler),
        (r'/static/(.*)', StaticHandler)
    ], **settings)


if __name__ == '__main__':
    app = make_app()
    http_server = tornado.httpserver.HTTPServer(app)
    ip='127.0.0.1'
    port = 8000
    http_server.bind(8000, ip)
    http_server.start(1)
    print('server start! http://{}:{}'.format(ip, port))
    tornado.ioloop.IOLoop.current().start()