import tornado.ioloop

import tornado.web

import tornado.httpserver  # 非阻塞

import tornado.options   # 提供了多种选择 python xxx.py --port=xxxx

from tornado.options import define,options

define('port',default=8000,help='run port',type=int)  # windows通过Ctrl+鼠标左键

define('version',default=0.1,help='version',type=str)

class MainHandler(tornado.web.RequestHandler):

    def get(self):

        self.render("ces.html")  # 写入页面

class AHandler(tornado.web.RequestHandler):

    def get(self):

        self.set_header("a",1)     # 设置响应头

        self.add_header("b",2)     # 添加 可重复名字

        self.clear_header("a")     # 撤销（删除）

class SendHandler(tornado.web.RequestHandler):

    def get(self):

        self.write("zzz")

        # self.flush()   有flush 仅对send_error不起作用

        self.write("不怕flush")

        # self.finish()  # 彻底结束

        self.send_error(404)   # 主动发出错误码

    def write_error(self, status_code, **kwargs):   # 会覆盖前面的缓冲区内的内容

        self.write("重写错误信息,覆盖前面的缓冲区内的内容")

        self.render("error.html")

class NotFoundHandler(tornado.web.RequestHandler):

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

        self.write("路由没找到")

class StatusHandler(tornado.web.RequestHandler):

    def get(self):

        self.set_status(404, "error")  # 修改状态码

class IndexHandler(tornado.web.RequestHandler):

    def set_default_headers(self):

        print("first--设置headers")

    def initialize(self):

        print("second--初始化")

    def prepare(self):

        print("third--准备工作")

    def get(self):

        print("fourth--处理get请求")

    def post(self):

        print('fourth--处理post请求')

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

        print("fifth--处理错误")

    def on_finish(self):

        print("sixth--c处理结束,释放资源--")

class GetHandler(tornado.web.RequestHandler):

    def get(self):                                   # 处理get请求

        name = self.get_argument("name","no")

        self.write(name)

        name = self.get_arguments("name")

        print(name)  # list

        self.write(str(name))

    def post(self, *args, **kwargs):　　　　　　　　　　# 处理post请求

        name = self.get_argument("name","no")

        passwd = self.get_argument("password","no")

        self.write("name: %s  <br> password:%s" %(name,passwd))

        name1 = self.get_body_argument("name","none")

        print(name1)

class UserHandler(tornado.web.RequestHandler):

    def get(self,name,age):

        self.write("name:%s<br>age:%s" %(name,age))

application = tornado.web.Application(

    handlers=[                      # 列表按顺序匹配

        (r"/", MainHandler),

        (r"/a", AHandler),

        (r"/send", SendHandler),

        (r"/sta", StatusHandler),

        (r"/index",IndexHandler),

        (r"/get",GetHandler),

        (r"/user/(.+)/([0-9]+)",UserHandler),

        (r"/user1/(?P<age>[0-9]+)/(?P<name>.+)",UserHandler),  # ?P<>取名

        (r"/.*", NotFoundHandler)

        ],

    template_path='templates',  # 表明页面html的路径

    debug=True           # 上传代码后服务器自动重启

)

if __name__ == '__main__':

    tornado.options.parse_command_line()   # 通过sys.arg获取命令行输入参数（python xxx.py --port=xxx）

    print(options.port)

    print(options.version)

    http_server = tornado.httpserver.HTTPServer(application)  # 非阻塞

    application.listen(options.port)

    tornado.ioloop.IOLoop.instance().start()   # 启动io循环