tornado

How to wrap asynchronous and gen functions together in Tornado?

由 巧了我就是萌 提交于 2020-01-01 17:09:15
问题 How to wrap asynchronous and gen functions together in Tornado? My code looks like below, the error is 'Future' object has no attribute 'body'. Did I place the decorators in a wrong way? import tornado.httpclient import tornado.web import tornado.gen import tornado.httpserver import tornado.ioloop class Class1(tornado.web.RequestHandler): @tornado.web.asynchronous def post(self, *args, **kwargs): url = self.get_argument('url', None) response = self.json_fetch('POST', url, self.request.body)

Python: How to combine a process poll and a non-blocking WebSocket server?

由 ∥☆過路亽．° 提交于 2020-01-01 16:35:31
问题 I have an idea. Write a WebSocket based RPC that would process messages according to the scenario below. Client connects to a WS (web socket) server Client sends a message to the WS server WS server puts the message into the incoming queue (can be a multiprocessing.Queue or RabbitMQ queue) One of the workers in the process pool picks up the message for processing Message is being processed (can be blazingly fast or extremely slow - it is irrelevant for the WS server) After the message is

Why does it make sense to use asynchronous clients for Redis?

由 你说的曾经没有我的故事 提交于 2020-01-01 12:12:09
问题 In this page listing the redis clients, I counted 8 asynchronous libraries. My understanding is that frameworks like as node.js or tornado only make sense when the asynchronous callback functions are not fighting with each other for I/O, otherwise you might as well go synchronous. But Redis is single-threaded. So they are actually fighting for I/O. Doesn't the single-threaded nature of Redis cancel all the potential benefits of asynchronous callbacks? Why does it make sense to use

How to handle a HTTP GET request to a file in Tornado?

由 ﹥＞﹥吖頭↗ 提交于 2020-01-01 06:08:34
问题 I'm using Ubuntu and have a directory called "webchat", under this directory there are 4 files: webchat.py, webchat.css, webchat.html, webchat.js. When creating a HTTP server using Tornado, i map the root ("/") to my python code: 'webchat.py' as follow: import os,sys import tornado.ioloop import tornado.web import tornado.httpserver #http server for webchat class webchat(tornado.web.RequestHandler): def get(self): self.write("Hello, chatter! [GET]") def post(self): self.write("Hello, chatter!

How to handle a HTTP GET request to a file in Tornado?

由 北战南征 提交于 2020-01-01 06:06:53
问题 I'm using Ubuntu and have a directory called "webchat", under this directory there are 4 files: webchat.py, webchat.css, webchat.html, webchat.js. When creating a HTTP server using Tornado, i map the root ("/") to my python code: 'webchat.py' as follow: import os,sys import tornado.ioloop import tornado.web import tornado.httpserver #http server for webchat class webchat(tornado.web.RequestHandler): def get(self): self.write("Hello, chatter! [GET]") def post(self): self.write("Hello, chatter!

python Tornado websockets how to send message every X seconds?

由 笑着哭i 提交于 2020-01-01 04:37:13
问题 I am trying to cobble together a test which allows websockets clients to connect to a Tornado server and I want the Tornado server to send out a message to all clients every X seconds. The reason I am doing this is because wbesockets connections are being silently dropped somewhere and I am wondering of periodic "pings" sent by the websockets server will maintain the connection. I'm afraid it's a pretty noobish question and the code below is rather a mess. I just don't have my head wrapped

Authentication using cookie key with asynchronous callback

由 。_饼干妹妹 提交于 2020-01-01 03:48:07
问题 I need to write authentication function with asynchronous callback from remote Auth API. Simple authentication with login is working well, but authorization with cookie key, does not work. It should checks if in cookies present key "lp_login", fetch API url like async and execute on_response function. The code almost works, but I see two problems. First, in on_response function I need to setup secure cookie for authorized user on every page. In code user_id returns correct ID, but line: self

tornado SQLAlchemy

由 安稳与你 提交于 2019-12-31 16:09:12
简介 tornado没有像Django那样提供了内建的ORM，需要使用第三方的SQLAlchemy来实现。 ORM全称：Object Relational Mapping 对象关系映射 好处：通过ORM可以不用关心后台是使用的哪种数据库，只需要按照ORM所提供的语法规则去书写相应的代码，ORM就会自动转换成对应的数据库SQL语句。 SQLAlchemy不仅仅只是用于tornado开发，它可以用于任何ORM场合。 补充： ORM叫对象关系映射，mysql是关系型数据库。而redis、mongodb它们是非关系数据库，以键值对形式表示数据，根本没有关系可言，所以没有ORM这一说法。 一、准备工作 1.安装好mysql 2.安装好所需的依赖：pymysql、sqlalchemy 二、SQLAlchemy连接数据库 （一）.导包 from sqlalchemy import create_engine （二）.设置连接的参数 HOSTNAME = '127.0.0.1' PORT = '3306' DATABASE = 'mydb' USERNAME = 'admin' PASSWORD = 'Root110qwe' （三）.定义连接数据库的URL db_url = 'mysql+pymysql://{}:{}@{}/{}?charset=utf8'.format(USERNAME

How to set React to production mode when using Gulp

由 天大地大妈咪最大 提交于 2019-12-31 12:51:47
问题 I need to run React in production mode, which presumably entails defining the following somewhere in the enviornment: process.env.NODE_ENV = 'production'; The issue is that I'm running this behind Tornado (a python web-server), not Node.js. I also use Supervisord to manage the tornado instances, so it's not abundantly clear how to set this in the running environment. I do however use Gulp to build my jsx files to javascript. Is it possible to somehow set this inside Gulp? And if so, how do I

Web框架之Tornado

由 懵懂的女人 提交于 2019-12-31 01:05:31
Web框架之Tornado 概述 Tornado 是 FriendFeed 使用的可扩展的非阻塞式 web 服务器及其相关工具的开源版本。这个 Web 框架看起来有些像web.py 或者 Google 的 webapp，不过为了能有效利用非阻塞式服务器环境，这个 Web 框架还包含了一些相关的有用工具 和优化。 Tornado 和现在的主流 Web 服务器框架（包括大多数 Python 的框架）有着明显的区别：它是非阻塞式服务器，而且速度相当快。得利于其 非阻塞的方式和对 epoll 的运用，Tornado 每秒可以处理数以千计的连接，这意味着对于实时 Web 服务来说，Tornado 是一个理想的 Web 框架。我们开发这个 Web 服务器的主要目的就是为了处理 FriendFeed 的实时功能 ——在 FriendFeed 的应用里每一个活动用户都会保持着一个服务器连接。（关于如何扩容 服务器，以处理数以千计的客户端的连接的问题，请参阅 C10K problem 。） 下载安装： ? 1 2 3 4 pip3 install tornado 源码安装 https: / / pypi.python.org / packages / source / t / tornado / tornado - 4.3 .tar.gz 框架使用 一、快速上手 + View Code ? 1 2
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