tornado

Broadcasting a message using Tornado

落爺英雄遲暮 提交于 2019-12-06 10:57:57
问题 I have an app sending messages which should be broadcasted to every currently connected client. Lets say the clients count could go in thousands. How do I achieve this broadcasting logic without blocking? Sample code that I think will block: clients = [] class Broadcaster(tornado.websocket.WebSocketHandler): def on_message(self, message): for client in clients: self.write_message(message) Every example I found on the web was like the above code. There were some examples using @gen.coroutine

好程序员分享Python从入门到精通最佳学习路线

一世执手 提交于 2019-12-06 10:38:13
  好程序员分享Python从入门到精通最佳学习路线,随着人工智能时代的来临,Python开始崭露头角并迅速吸引了人们的广泛关注。很多人想要从事Python开发,但需要学什么内容、怎么快速学习呢?接下来小编就给大家分享Python最佳学习路线。   第一阶段Python基础与Linux数据库。这是Python的入门阶段,也是帮助零基础学员打好基础的重要阶段。你需要掌握Python基本语法规则及变量、逻辑控制、内置数据结构、文件操作、高级函数、模块、常用标准库模块、函数、异常处理、MySQL使用、协程等知识点。   学习目标:掌握Python基础语法,具备基础的编程能力;掌握Linux基本操作命令,掌握MySQL进阶内容,完成银行自动提款机系统实战、英汉词典、歌词解析器等项目。   第二阶段WEB全栈。这一部分主要学习Web前端相关技术,你需要掌握HTML、CSS、JavaScript、jQuery、BootStrap、Web开发基础、VUE、Flask Views、Flask模板、 数据库操作、Flask配置等知识。   学习目标:掌握WEB前端技术内容,掌握WEB后端框架,熟练使用Flask、Tornado、Django,可以完成数据监控后台的项目。   第三阶段数据分析+人工智能。这部分主要是学习爬虫相关的知识点,你需要掌握数据抓取、数据提取、数据存储、爬虫并发、动态网页抓取

Tornado or Django works with CGI?

不想你离开。 提交于 2019-12-06 10:10:42
Tornado is a webserver + framework like Django but for real-time features. On my server I don't have a python module or wsgi module so I thought CGI. Is there a way to get Tornado ( or Django ) works by using CGI folder ? If yes, Could you explain me how do I do that ? flup provides a CGI-to-WSGI adapter, but you really should consider using something like FastCGI instead. Main feature of Tornado is that it is high performance web-server written in Python, for creating web applications using Python programming language. Running Tornado as CGI application negates the very reason it exists,

How can I cancel a hanging asyncronous task in tornado, with a timeout?

浪尽此生 提交于 2019-12-06 09:13:07
My setup is python tornado server, which asynchronously processes tasks with a ThreadPoolExecutor . In some conditions, the task might turn into infinite loop. With the with_timeout decorator, I have managed to catch the timeout exception and return an error result to the client. The problem is that the task is still running in the background. How it is possible to stop the task from running in the ThreadPoolExecutor ? Or is it possible to cancel the Future ? Here is the code that reproduces the problem. Run the code with tornado 4 and concurrent.futures libraries and go to http://localhost

How to manage nohup.out file in Tornado?

℡╲_俬逩灬. 提交于 2019-12-06 08:57:33
I built a web service using tornado and it serves days and nights. I used the command to start my service: nohup python my_service.py & The service log is able to write to nohup.out . However, the file becomes bigger as time goes. I want to know how can I manage it more conveniently? For saying, using an automatic method to generate the log files with proper names and size? Such as: service_log_1.txt service_log_2.txt service_log_3.txt ... Thanks. jjsmith83 Yes, there is. Put a cron-job in effect, which truncates the file (by something like "cat /dev/null > nohup.out" ). How often you will

Python BaseHTTPServer and Tornado

穿精又带淫゛_ 提交于 2019-12-06 08:07:21
I'm running a BaseHTTPServer, passed through ThreadedHTTPServer so I get threading. server = ThreadedHTTPServer(('', int(port)), MainHandler) Next I fork according to the info here: Daemonizing python's BaseHTTPServer Then I do: server.serve_forever() What I am trying to do is have the same Python script run a Tornado WebSocket server as well, I tried creating the second handler and in my main creating the second server similar to above, but then the serve_forever() blocks (I assume) and I can't start the Tornado WebSocket server. I had considered using Tornado to serve my general web stuff

How could I make asynchronous mysql operations in tornado using Python3.4?

倾然丶 夕夏残阳落幕 提交于 2019-12-06 07:43:30
问题 I now use Python3.4 and I want to use asynchronous mysql client in Tornado. I have found torndb but after reading its source code, I think it couldn't make asynchronous mysql operations because it just encapsulates MySQLdb package. So is there a way to make asynchronous mysql operations in Tornado? 回答1: The canonical way to use MySQL with tornado is to use a separate set of processes to talk to MySQL and use asynchronous http requests to talk to those servers (see also answer #2 in Is Tornado

How to send message from the child process to websocket-client in Tornado?

生来就可爱ヽ(ⅴ<●) 提交于 2019-12-06 07:23:00
I have the Tornado server. It receives messages from websocket-connections. I need to run the worker function as a separate process and the worker should answer to client. The main idea is to work in a parallel mode. Something like this def worker(ws,message): input = json.loads(message) t = input["time"] time.sleep(t) ws.write_message("Hello, World!"*int(t)) class MainHandler(tornado.web.RequestHandler): def get(self): self.render('index.html') class WebSocket(tornado.websocket.WebSocketHandler): def check_origin(self, origin): return True def open(self): print("WebSocket opened") self

Passing data between classes in Tweepy and Tornado WebSocket

喜欢而已 提交于 2019-12-06 06:18:49
I have two main modules, Tornado WebSocket and Tweepy Streaming, and I'm trying to get them to talk to each other. Under on_status in the StdOutListener Tweepy class below (marked with <-- ), I'd like to call the WSHandler.on_message Tornado class higher up, with data passed from on_status . I'm not able to do so however, as I get error-messages related to undefined instances etc. with the code below. Any help greatly appreciated! (Also, the only non-blocking way I've managed to run both modules at the same time is with threading, as the IOLoop.add_callback does not keep StdOutListener from

tornado的Application的一些事儿

大憨熊 提交于 2019-12-06 05:27:15
from tornado.httpserver import HTTPServer from tornado.routing import RuleRouter, Rule, PathMatches, Router, HostMatches from tornado.web import RequestHandler, Application, StaticFileHandler from tornado.ioloop import IOLoop import uimodules class Http404(RequestHandler): def get(self): self.render('404.html') class Handler1(RequestHandler): def initialize(self, k1): self.k1 = k1 def get(self): print(self.reverse_url('index')) self.write('1') settins = { 'debug': False, # 调试模式和自动重载 'default_handler_class': Http404, # 如果没有匹配项就处理该类(比如自定义404页面) 'compress_response': True, 'ui_modules': uimodules,