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
1 # -*- coding:utf-8 -*-
2
3 import tornado.web
4 import tornado.httpserver
5 import tornado.options
6 import tornado.ioloop
7 from tornado.options import define,options
8
9 define('port', default=8080, help='run port', type=int)
10 define('version', default='0.0.1', help='version 0.0.1', type=str)
11
12
13 class SetHandler(tornado.web.RequestHandler):
14
15 def get(self):
16 self.write('set_header')
17 self.set_header('aaa',111) # 设置响应头
18 self.set_header('ccc',222)
19 self.set_header('ccc',333) # 重复设置会覆盖前面的
20 self.clear_header('ccc') # 清除响应头
21 self.add_header('ccc',333) # 增加响应头
22
23
24 class AddHandler(tornado.web.RequestHandler):
25
26 def get(self):
27 self.write('add_header')
28 self.add_header('abc',444) # 增加响应头
29
30
31 class SendHandler(tornado.web.RequestHandler):
32
33 def get(self):
34 self.write('send_error <br>')
35 # 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
36 # 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
37 self.write('我被执行了')
38 self.send_error(404)
39
40
41 class NotFoundHandler(tornado.web.RequestHandler):
42
43 def get(self, *args, **kwargs):
44 self.send_error(404)
45
46 def write_error(self, status_code, **kwargs):
47 self.render('error.html')
48
49
50
51 class StatusHandler(tornado.web.RequestHandler):
52
53 def get(self, *args, **kwargs): # 重写状态码
54 self.write('set_status')
55 self.set_status(200,'every good !')
56
57
58 '''工作流程'''
59 class IndexHandler(tornado.web.RequestHandler):
60
61 def set_default_headers(self):
62 print('-----set_default_headers:设置headers----')
63
64 def initialize(self):
65 print('----initialize: 初始化----')
66
67 def prepare(self):
68 print('----prepare:准备工作----')
69
70 def get(self, *args, **kwargs):
71 self.write('----get 处理请求----')
72
73 def post(self, *args, **kwargs):
74 self.write('----post 处理请求----')
75
76 def write_error(self, status_code, **kwargs):
77 self.render('error.html')
78
79 def on_finish(self):
80 print('----on_finish: 处理结束 释放资源----')
81
82
83 application = tornado.web.Application(
84 handlers = [
85 (r"/",SetHandler),
86 (r"/add",AddHandler),
87 (r"/send",SendHandler),
88 (r"/status",StatusHandler),
89 (r"/index",IndexHandler),
90 (r"/(.*)",NotFoundHandler),
91 ],
92 template_path = './error',
93 debug = True,
94 )
95
96 if __name__ == '__main__':
97 print(options.port)
98 print(options.version)
99 tornado.options.parse_command_line()
100 http_server = tornado.httpserver.HTTPServer(application)
101 http_server.listen(options.port)
102 tornado.ioloop.IOLoop.instance().start()
