tornado

设置 tornado 服务器的响应行和响应头

两盒软妹~` 提交于 2020-02-07 12:54:22
设置 tornado 服务器的响应行和响应头 from tornado . httpserver import HTTPServer from tornado . ioloop import IOLoop from tornado . options import define , parse_config_file , options from tornado . web import Application , RequestHandler define ( 'port' , type = int , default = 8888 , multiple = False ) parse_config_file ( 'config' ) class IndexHandler ( RequestHandler ) : def initialize ( self ) : '''get方法之前执行''' print ( 'initalize方法执行' ) def get ( self , * args , ** kwargs ) : self . write ( 'hello tornado' ) # self.set_status(404) # 设置响应头的状态码为404,但页面可以正常响应 self . set_status ( 777 , 'false code' ) #

disable browser cache for back button?

风格不统一 提交于 2020-02-06 04:11:25
问题 This is what I have tried from Python/tornadoweb: self.set_header("Cache-Control","no-cache, must-revalidate, max-age=0") self.set_header("Expires","Mon, 26 Jul 1997 05:00:00 GMT") This is what I see from firebug when I first load the page: Cache-Control no-cache, must-revalidate, max-age=0 Content-Length 1715 Content-Type text/html; charset=UTF-8 Etag "e55dc7115d80aa09b470510ababb3515706f4a61" Expires Mon, 26 Jul 1997 05:00:00 GMT Server TornadoServer/2.3 Set-Cookie xsfr

[原]tornado源码分析系列(五)[HTTPServer 层]

狂风中的少年 提交于 2020-02-04 07:44:31
引言:第四章讲解的有些乱,主要是代码太长了,而且还是在一章就讲完了,所以我决定将IOStream上层的HTTPServer类分作几章来讲,不按照代码顺序 在讲完了IOLoop和IOStream后就知道,第一次在监听套接口的时候需要用到IOLoop,然后创建一个IOStream对象,然后以后的IO操作都由IOStream对象完成 所以在上层的HTTP协议处理中,tornado定义了一个HTTPConnection类 这个类主要完成的工作就是完成对下,完成HTTP数据包的传输,对上层HTTPserver提供解析后的request对象 那么他们之间的工作模式是怎样的呢 看看Demo import httpserver import ioloop def handle_request(request): message = "You requested %s\n" % request.uri request.write("HTTP/1.1 200 OK\r\nContent-Length: %d\r\n\r\n%s" % ( len(message), message)) request.finish() http_server = httpserver.HTTPServer(handle_request) http_server.listen(8888) ioloop.IOLoop

Tornado doesn't restart cleanly in supervisor

怎甘沉沦 提交于 2020-01-31 05:25:11
问题 I'm using tornado to run a flask app, and I have a shell script which does a little work and then runs the app. #!/usr/bin/env bash some_work more_work python /usr/share/theapp/theapp.py I use supervisor to manage this little script. Starting up works fine ( sudo supervisorctl start theapp.sh ), but when I want to restart, the python subprocess doesn't exit and hangs around, occupying the port and preventing startup again. I've tried adding traps to ensure that the python code really is

Tornado doesn't restart cleanly in supervisor

痴心易碎 提交于 2020-01-31 05:25:11
问题 I'm using tornado to run a flask app, and I have a shell script which does a little work and then runs the app. #!/usr/bin/env bash some_work more_work python /usr/share/theapp/theapp.py I use supervisor to manage this little script. Starting up works fine ( sudo supervisorctl start theapp.sh ), but when I want to restart, the python subprocess doesn't exit and hangs around, occupying the port and preventing startup again. I've tried adding traps to ensure that the python code really is

Tornado 协程

∥☆過路亽.° 提交于 2020-01-30 00:42:51
同步异步I/O客户端 from tornado.httpclient import HTTPClient,AsyncHTTPClient def ssync_visit(): http_client = HTTPClient() response = http_client.fetch('www.baidu.com') # 阻塞,直到网站请求完成 print(response.body) def hendle_response(response): print(response.body) def async_visit(): http_client = AsyncHTTPClient() http_client.fetch('www.baidu.com',callback=hendle_response) # 非阻塞 async_visit() 协程 1、编写协程函数 from tornado import gen # 引入协程库 from tornado.httpclient import AsyncHTTPClient @gen.coroutine def coroutine_visit(): http_client = AsyncHTTPClient() response = yield http_client.fetch('www.baidu.com') print

tornado异步请求非阻塞

∥☆過路亽.° 提交于 2020-01-30 00:22:32
前言也许有同学很迷惑:tornado不是标榜异步非阻塞解决10K问题的嘛?但是我却发现不是torando不好,而是你用错了 比如最近发现一个事情:某网 前言 也许有同学很迷惑:tornado不是标榜异步非阻塞解决10K问题的嘛?但是我却发现不是torando不好,而是你用错了.比如最近发现一个事情:某网站打开页面很慢,服务器cpu/内存都正常.网络状态也良好. 后来发现,打开页面会有很多请求后端数据库的访问,有一个mongodb的数据库业务api的rest服务.但是它的tornado却用错了,一步步的来研究问题: 说明 以下的例子都有2个url,一个是耗时的请求,一个是可以或者说需要立刻返回的请求,我想就算一个对技术不熟,从道理上来说的用户, 他希望的是他访问的请求不会影响也不会被其他人的请求影响 #!/bin/env python import tornado.httpserver import tornado.ioloop import tornado.options import tornado.web import tornado.httpclient import time from tornado.options import define, options define("port", default=8000, help="run on the given port

Checking all elements with one click with Tornado

守給你的承諾、 提交于 2020-01-25 07:13:11
问题 I have this part of code in my html page: {% if users %} {% for user in users %} <form name="form_user_{{ user.id }}" method="post" action="/networks/{{ net.id }}/sensors/{{ sens.id }}/rights"> <tr> <td> <div> {{ escape(user.name) }} <input type='hidden' name="id" value='{{ user.id }}'> </div> </td> <td> <label class="radio inline" onclick="document.forms['form_user_{{ user.id }}'].submit();"> <input type="radio" name="perms" id="perms_{{user.id}}_0" value="0"> None </label> <label class=

buuctf 刷题记录 模板注入

青春壹個敷衍的年華 提交于 2020-01-24 22:10:59
查看源代码发现三个txt进入的格式是这样的 把filename改为/fllllllllllllag emmmmm,点其他的看看 有思路了重点就是求出这个cookie_secret 作为一个菜鸡,百度tornado 然后了解到了模板注入(配上网址https://www.jianshu.com/p/aef2ae0498df) render是一个类似模板的东西,可以使用不同的参数来访问网页 在tornado模板中,存在一些可以访问的快速对象,例如 {{ escape(handler.settings[“cookie”]) }} 构造playload :r?msg={{handler.settings}} 知道cookie_secret就简单了 直接按照题意来出来flag了 来源: CSDN 作者: SopRomeo 链接: https://blog.csdn.net/SopRomeo/article/details/104008989

DateField is not rendered as type=“date”

人盡茶涼 提交于 2020-01-24 02:17:06
问题 class Form(Form): plan_start = DateField('Plan Start', validators=[Required()]) this code will render this html. <input id="plan_start" name="plan_start" type="text" value=""> My question is: why the type is text and not date ? I only can get this resolved by passing explicitly the type='date' in template. {% raw form.plan_start.label %}{% raw form.plan_start(type='date') %} 回答1: You can use the DateField from html5. from wtforms.fields.html5 import DateField class Form(Form): plan_start =