tornado | 易学教程

Passing data between classes in Tweepy and Tornado WebSocket

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问题 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

Tornado or Django works with CGI?

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问题 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 ? 回答1: flup provides a CGI-to-WSGI adapter, but you really should consider using something like FastCGI instead. 回答2: Main feature of Tornado is that it is high performance web-server written in Python, for creating web

Jupyter notebook ImportError: No module named tornado.log

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问题 I have installed jupyter and when trying to start it, I get the following error: File "/Library/Frameworks/Python.framework/Versions/2.7/bin/jupyter-notebook", line 7, in <module> from notebook.notebookapp import main File"/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/notebook/__init__.py", line 25, in <module> from .nbextensions import install_nbextension File "/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/notebook/nbextensions

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

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问题 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

How to manage nohup.out file in Tornado?

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问题 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. 回答1: Yes, there is. Put a cron-job in effect,

How would I implement “tail” over HTTP with Python Tornado?

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问题 I'm trying to implement something like "tail -f" over HTTP with Python. Currently, I'm trying to use Tornado, but it only is handling one connection at a time, even when I do asynchronous requests. import socket import subprocess import tornado.gen as gen import tornado.httpserver import tornado.ioloop import tornado.iostream import tornado.options import tornado.web from tornado.options import define, options define("port", default=8888, help="run on the given port", type=int) define(

How to run the Tornado event loop alongside a Kivy GUI?

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问题 My client application uses a Kivy GUI (Kivy has its own event loop) and connects to the server using the WebSocket protocol with Tornado (Tornado also has an event loop). That's why the connection part is asynchronous. I want the user to interact with the UI while a Tornado client is running an infinite asynchronous loop of listening for server messages. Here's some example code: client_test.py from tornado.ioloop import IOLoop from tornado.websocket import websocket_connect class

how do I write a middleware for tornado?

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Every request to a handler in my tornado app need to check and validate a key before it processes the request. How could I create a middleware class in Tornado which would check and validate the key before if processes the request? My middleware class function would look something like this. class Checker(object): def process_request(self, request): try: key = request.META['HTTP_X_KEY'] except KeyError: key = None if key and key == os.environ.get('KEY'): #Process the request return None #Redirect to Home Page return HttpResponsePermanentRedirect('http://google.com', status=301) It is possible

Why is “pip install tornado” not installing the tornado module?

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问题 I am trying to install tornado onto my virtual environment, so I can get Jupyter to work. I tried pip install tornado and it seems like it runs but it only installs other modules. I even tried to uninstall tornado and then try to reinstall it, but since it doesn't exist, I can't even uninstall it. Is there a way to install tornado so I can see it? I feel like I've tried everything. Any advice? Edit1: I should mention, updating pip did nothing. The shell output below is me setting up virtual

What about the C10k in practice?

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问题 I just tested a small application made using Tornado , and i'm far from the 10k simultanuous connections ! To make the test, i've used Siege, under OpenSuse 12.2 64 bit , the machine is i7 with 8GB Here is the result: siege -c 4000 localhost:8000 I got this error: Transactions: 2164 hits Availability: 39.90 % Elapsed time: 6.85 secs Data transferred: 2.52 MB Response time: 1.04 secs Transaction rate: 315.91 trans/sec Throughput: 0.37 MB/sec Concurrency: 329.74 Successful transactions: 2164