python tornado websocket实时日志展示的实例代码

    #模块路径根据自身项目而定
    (r'/logs/index/',               'apps.logs.handler.IndexHandler'),
    (r'/logs/newlinesforcallbacker/',       'apps.logs.handler.WriteNewLinesHandler'),
    (r'/logs/newlinesforserver/',           'apps.logs.handler.ReceiveNewLinesHandler'),

class IndexHandler(BaseHandler):
    ''' 主页 '''
    def get(self, *args, **kwargs):
        self.render('logs/index.html')

<div align="center">
    <h2>this logs monitor</h2>
    <div style="width: 70%" id="main">
　　　　<!-- 行展示 -->
    </div>
</div>

class ProStatus(object):
    ''' 处理类 '''

    w_register = []

    def register(self, callbacker):
        ''' 记录客户端连接实例 '''
        self.w_register.append(callbacker)

    def unregister(self, callbacker):
        ''' 删除客户端连接实例 '''
        self.w_register.remove(callbacker)

    def makelines(self, lines):
        ''' 处理接受的行内容 '''
        pass

    def trigger(self, line):
        ''' 向所有被记录客户端发送最新内容 '''
       pass

class WriteNewLinesHandler(tornado.websocket.WebSocketHandler):
    ''' 接受websocket链接，保存链接实例 '''
    def check_origin(self, origin):     #针对websocket处理类重写同源检查的方法
        return True

    def open(self):
        ''' 处理新的连接  '''
        ProStatus().register(self)

    def on_close(self):
        ProStatus().unregister(self)  #删除客户端连接

    def on_message(self, message):
        pass

$(function(){
            function requestText(){
                host = "ws://" + location.hostname + ":" + location.port + "/logs/newlinesforcallbacker/"
                websocket = new WebSocket(host)

                websocket.onopen = function(evt){}      // 建立连接
                websocket.onmessage = function(evt){    // 获取服务器返回的信息
                    data = $.parseJSON(evt.data)
                    $("#main").append(data+"</br>")     //写入页面
                }
                websocket.onerror = function(evt){}
            }

            requestText()
})

class ProStatus(object):
    ''' 处理类 '''

    w_register = []

    def register(self, callbacker):
        ''' 记录客户端连接实例 '''
        pass

    def unregister(self, callbacker):
        ''' 删除客户端连接实例 '''
        pass

    def makelines(self, lines):
        ''' 处理接受的行内容 '''
        for line in lines:
            self.trigger(line)

    def trigger(self, line):
        ''' 向所有被记录客户端发送最新内容 '''
        for callabler in self.w_register:
            callabler.write_message(json.dumps(line))

class ReceiveNewLinesHandler(BaseHandler):
    ''' 接受服务器端脚本提交的最新行内容 '''
    def post(self, *args, **kwargs):
        linesdata = self.get_argument('lines', '')
        #print type(json.loads(linesdata))
        ProStatus().makelines(json.loads(linesdata))

#-*-coding:utf-8-*-
author = 'zhouwang'
import time
import urllib
import urllib2
import json

p = 0
while True:
    f = open('logs.txt', 'r+')
    f.seek(p, 0)    #偏移到上次结束位置

    lines = f.readlines()

    if lines:
        #对行内容操作, 向服务器发送最新行内容
        data = urllib.urlencode({'lines':json.dumps(lines)})
        url = 'http://localhost:8800/logs/newlinesforserver/'
        req = urllib2.Request(url, data)
        res_data = urllib2.urlopen(req)
        #print res_data.read()

    #获取当前位置，作为偏移值
    p = f.tell()
    f.close()
    time.sleep(1)