tornado 响应头 中断 状态码 工作流程

set_header    设置响应头

clear_header 清除响应头

add_header   增加响应头

self.flush  self.finish  中断

set_status     设置状态码

工作流程

　　lesso3.py

 # -*- coding:utf-8 -*-

 import tornado.web
 import tornado.httpserver
 import tornado.options
 import tornado.ioloop
 from tornado.options import define,options

 define('port', default=8080, help='run port', type=int)
 define('version', default='0.0.1', help='version 0.0.1', type=str)

 class SetHandler(tornado.web.RequestHandler):

     def get(self):
         self.write('set_header')
         self.set_header('aaa',111) # 设置响应头
         self.set_header('ccc',222)
         self.set_header('ccc',333) # 重复设置会覆盖前面的
         self.clear_header('ccc')   # 清除响应头
         self.add_header('ccc',333) # 增加响应头

 class AddHandler(tornado.web.RequestHandler):

     def get(self):
         self.write('add_header')
         self.add_header('abc',444)  # 增加响应头

 class SendHandler(tornado.web.RequestHandler):

     def get(self):
         self.write('send_error <br>')
         # self.flush()  # 如果加上这个flush会小小的中断一下 后面的send_error 不会执行 write 会执行
         # self.finish()  # 如果加上这个finish会彻底中断,后面的任何指令都不会执行
         self.write('我被执行了')
         self.send_error(404)

 class NotFoundHandler(tornado.web.RequestHandler):

     def get(self, *args, **kwargs):
         self.send_error(404)   

     def write_error(self, status_code, **kwargs):
         self.render('error.html')

 class StatusHandler(tornado.web.RequestHandler):

     def get(self, *args, **kwargs):  # 重写状态码
         self.write('set_status')
         self.set_status(200,'every good !')

 '''工作流程'''
 class IndexHandler(tornado.web.RequestHandler):

     def set_default_headers(self):
         print('-----set_default_headers:设置headers----')

     def initialize(self):
         print('----initialize: 初始化----')

     def prepare(self):
         print('----prepare:准备工作----')

     def get(self, *args, **kwargs):
         self.write('----get 处理请求----')

     def post(self, *args, **kwargs):
         self.write('----post 处理请求----')

     def write_error(self, status_code, **kwargs):
         self.render('error.html')

     def on_finish(self):
         print('----on_finish: 处理结束 释放资源----')

 application = tornado.web.Application(
     handlers = [
     (r"/",SetHandler),
     (r"/add",AddHandler),
     (r"/send",SendHandler),
     (r"/status",StatusHandler),
     (r"/index",IndexHandler),
     (r"/(.*)",NotFoundHandler),
     ],
     template_path = './error',
     debug = True,
 )

 if __name__ == '__main__':
     print(options.port)
      print(options.version)
      tornado.options.parse_command_line()
     http_server = tornado.httpserver.HTTPServer(application)
     http_server.listen(options.port)
     tornado.ioloop.IOLoop.instance().start()