python Tornado框架的使用方法有哪些

pip install tornado

'''
@File    : views_service.py
@Copyright : rainbol
@Date    : 2020/8/31
@Desc    :
'''
import threading
import time
import tornado.web
import tornado
import tornado.ioloop
import tornado.web
import tornado.gen
from tornado.concurrent import run_on_executor
from concurrent.futures import ThreadPoolExecutor
from uuid import uuid4
import random

all_count = 0
big_list = {}


class ServiceHandler(tornado.web.RequestHandler):
  executor = ThreadPoolExecutor(20) # 最大線程數(shù) 必須定義一個(gè)executor的屬性，然后run_on_executor裝飾器才會(huì)有用。

  @run_on_executor # 在這個(gè)方法下，線程內(nèi)運(yùn)行；query函數(shù)被run_on_executor包裹(語(yǔ)法糖)，將該函數(shù)的執(zhí)行傳遞給線程池executor的線程執(zhí)行，優(yōu)化了處理耗時(shí)性任務(wù)，以致達(dá)到不阻塞主線程的效果。
  def time_demo(self, tid, uid):
    time.sleep(tid)
    threading_id = threading.current_thread().ident
    big_list[uid] = threading_id

  @tornado.gen.coroutine # 異步、協(xié)程處理；增加并發(fā)量
  def post(self):
    global all_count
    all_count += 1
    uid = str(uuid4())
    yield self.time_demo(random.randint(1, 100), uid) # 模擬業(yè)務(wù)處理,使用yield來(lái)實(shí)現(xiàn)異步阻塞請(qǐng)求
    r = {'status': 'True', '線程id': '%s' % big_list[uid], "count": all_count}

    self.write(tornado.escape.json_encode(r)) # 寫(xiě)入返回信息寫(xiě)入response
    self.finish() # 結(jié)束服務(wù)

  def get(self):
    return self.post()

'''
@File    : __init__.py
@Copyright : rainbol
@Date    : 2020/8/31
@Desc    :
'''
import tornado.web # web框架
import tornado.httpserver # http服務(wù)
import tornado.ioloop # 輸入輸出事件循環(huán)
import tornado.options # 配置工具
from tornado.options import options, define
from app.config import configs
from app.urls import urls
define('port', default=8000, type=int, help='運(yùn)行端口')


# 自定義應(yīng)用
class CustomApplication(tornado.web.Application):
  def __init__(self): # 重寫(xiě)構(gòu)造方法
    # 指定路由規(guī)則
    handlers = urls
    # 指定配置文件
    settings = configs
    super(CustomApplication, self).__init__(handlers=handlers, **settings)


# 定義服務(wù)
def create_server():
  # 允許在命令行中啟動(dòng)
  #tornado.options.parse_command_line()
  # 創(chuàng)建http服務(wù)
  http_server = tornado.httpserver.HTTPServer(
    CustomApplication() # 注意要實(shí)例化
  )
  # 綁定監(jiān)聽(tīng)的端口
  http_server.listen(options.port)
  # 啟動(dòng)輸入輸出事件循環(huán)
  tornado.ioloop.IOLoop.instance().start()

'''
@File    : manage.py
@Copyright : rainbol
@Date    : 2020/8/31
@Desc    :
'''
from app.views import create_server



if __name__ == '__main__':
  create_server()

from app.views.views_index import IndexHandler as index
from app.views.views_service import ServiceHandler as service

# 配置路由和配置到映射規(guī)則

urls = [
  (r"/index", index),
  (r"/demo", service),
]