import tornado.web

import tornado.ioloop

import tornado.options

import tornado.httpserver

import os

from tornado.options import options

from tornado.web import RequestHandler

tornado.options.define('port', type=int, default=8000, help="服务器端口")

class IndexHandler(RequestHandler):

    # 设置默认的headers请求头

    def set_default_headers(self):

        # 设置请求头

        self.set_header('Content-Type', 'application/json')

        self.set_header('name', 'namejr')

    def get(self):

        self.set_header('name', 'jr')  # 设立会更改请求头的name属性(覆盖)

        self.write('OK')

if __name__ == '__main__':

    tornado.options.parse_command_line()

    app = tornado.web.Application([

        (r'/', IndexHandler),

    ],

    debug=True,

    )

    http_server = tornado.httpserver.HTTPServer(app)

    http_server.listen(options.port)

    tornado.ioloop.IOLoop.current().start()

import tornado.web

import tornado.ioloop

import tornado.options

import tornado.httpserver

from tornado.options import options

from tornado.web import RequestHandler

tornado.options.define('port', type=int, default=8000, help="服务器端口")

class IndexHandler(RequestHandler):

    # 自定义write_error

    def write_error(self, scode, **kwargs):

        self.write('错误状态码: {}'.format(scode))

        self.write('错误原因: {}'.format(kwargs['content']))

    def get(self):

        self.write_error(404, content='未找到网页')

        self.write('OK')

if __name__ == '__main__':

    tornado.options.parse_command_line()

    app = tornado.web.Application([

        (r'/', IndexHandler),

    ], debug=True)

    http_server = tornado.httpserver.HTTPServer(app)

    http_server.listen(options.port)

    tornado.ioloop.IOLoop.current().start()