tornado

Python Tornado搭建高并发Restful API接口服务

由 ￣綄美尐妖づ 提交于 2019-12-28 19:45:43
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，而且速度相当快能实现高并发。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。Tornado不同于其他python web框架，它是一个服务器，部署非常简单。 开发环境搭建： 1.Python3.7 2.Tornado 6.02 依赖包： peewee-async(异步数据库引擎) aiofiles(异步读写文件) Wtforms(表单) 项目组织结构： 类似于Django，由多个独立app构成： 数据库模型 使用peewee提供的ORM，编写数据库基类，默认添加两个字段，添加时间和更新时间，如下： from peewee import * from datetime import datetime class BaseModel(Model): add_time = DateTimeField(default=datetime.now, verbose_name="添加时间", help_text='添加时间') update_time = DateTimeField(default=datetime.now, verbose_name=

tornado框架的简单实用

由 岁酱吖の 提交于 2019-12-28 13:09:30
一.安装模块 pip3 install tornado 二.简单的起服务的方法 import json, datetime from tornado.web import RequestHandler, Application from tornado.ioloop import IOLoop from tornado.httpserver import HTTPServer from tornado.options import define, options # 异步 import tornado.gen # 定义全局变量 define("port", default=9631) class getTest(RequestHandler): def get(self): # logDebug("shoppingCart","get:test请求成功") return self.write(json.dumps({"code": 200, "message": "请求成功"}, ensure_ascii=False)) class MainHandler(tornado.web.RequestHandler): @tornado.gen.coroutine def head(self, *args, **kwargs): self.write((json.dumps({"Test

Tornado的异步非阻塞

由 徘徊边缘 提交于 2019-12-26 00:41:24
一、进程池和线程池 1.串行 import time import requests url_lists = [ 'http://www.baidu.com', 'http://fanyi.baidu.com', 'http://map.baidu.com', 'http://music.baidu.com/', 'http://tieba.baidu.com', 'http://v.baidu.com', 'http://image.baidu.com', 'http://zhidao.baidu.com', 'http://news.baidu.com', 'http://xueshu.baidu.com'] start_time = time.time() for url in url_lists: response = requests.get(url) print(response.text) print("Runtime: {}".format(time.time()-start_time)) # Runtime: 1.95 　　 2.多进程 import time import requests from multiprocessing import Process url_lists = [ 'http://www.baidu.com', 'http://fanyi

Tornado websocket client loosing response messages?

由 北慕城南 提交于 2019-12-25 09:35:30
问题 I need to process frames from a webcam and send a few selected frames to a remote websocket server. The server answers immediately with a confirmation message (much like an echo server). Frame processing is slow and cpu intensive so I want to do it using a separate thread pool (producer) to use all the available cores. So the client (consumer) just sits idle until the pool has something to send. My current implementation, see below, works fine only if I add a small sleep inside the producer

Server-push whenever a function is called: Ajax or WebSockets

由 这一生的挚爱 提交于 2019-12-25 07:23:02
问题 I am currently working on a status-dashboard in Tornado (python). I need to have the web page dynamically update (by re-rendering a template) whenever an outside function is called. I was curious what is the most efficient way to accomplish this? and are their any tutorials out there for something similar. 回答1: If you want actual server push, then you will need either webSocket or server-sent events. Since server-sent events is very new (and not supported in very many browsers), your main

can a single instance of websocket[tornado] to handle different requests?

由 社会主义新天地 提交于 2019-12-25 04:45:33
问题 I work on a project which uses Ajax and Websockets. The task is to get rid of the Ajax and to use Websockets only. On the server side I'm using tornado and django with a tornado-url-dispatcher. I want to reuse some methods already defined in django using a single instance of websocket(tornado.websocket.WebSocketHandler). This class has 3 default handlers but I extended it by adding new handlers which redirects to the existent django methods and modified the dispatcher to point to the new

Tornado and Unicode

由 走远了吗. 提交于 2019-12-25 03:58:30
问题 does tornado accept unicode in the adress? #coding: utf-8 (there is # dont know how to show it here...) import tornado.ioloop import tornado.web class Abdou(tornado.web.RequestHandler): def get(self): self.write("hi") miaw = tornado.web.Application([ (u'/ééé', Abdou), ]) if __name__ == "__main__": miaw.listen(8000) tornado.ioloop.IOLoop in Flask it worked !!! from flask import Flask miaw = Flask(__name__) @miaw.route(u'/ééé') def abdou(): return "hi!" if __name__ == '__main__': miaw.run() NB:

How do you call function after client finishes download from tornado web server?

由 风流意气都作罢 提交于 2019-12-24 16:33:12
问题 I would like to be able to run some cleanup functions if and only if the client successfully completes the download of a file I'm serving using Tornado. I installed the firefox throttle tool and had it slow the connection down to dialup speed and installed this handler to generate a bunch of rubbish random text: class CrapHandler(BaseHandler): def get(self, token): crap = ''.join(random.choice(string.ascii_uppercase + string.digits) for x in range(100000)) self.write(crap) print "done" I get

Does twisted, cyclone or tornado do SMP multicore out of the box

由 半腔热情 提交于 2019-12-24 12:04:09
问题 I'd like to use any one of the 3 mentioned non-blocking servers on an AWS Linux server with 8 cores. It's not clear in any of the documentation whether SMP is implemented under the covers in the respective helloworld or any other examples. For example, this cyclone helloworld mentions nothing about cores or SMP or threads per core. import cyclone.web class MainHandler(cyclone.web.RequestHandler): def get(self): self.write("Hello, world") class Application(cyclone.web.Application): def __init_
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