我们都知道在Web开发中，都需要服务器，比如Java Web开发的Tomcat，WebLogic，WebSphere，现在来看利用Tornado Web Server框架如何写一个简易的Python服务器。
一般来说只需要实现get和post方法就可以了。以上次使用redis数据库的例子说明，数据库插入代码如下：
import redisimport datetime class Database: def __init__(self): self.host = 'localhost' self.port = 6379 self.write_pool = {} def add_write(self,website,city,year,month,day,deal_number): key = '_'.join([website,city,str(year),str(month),str(day)]) val = deal_number self.write_pool[key] = val def batch_write(self): try: r = redis.StrictRedis(host=self.host,port=self.port) r.mset(self.write_pool) except Exception, exception: print exception def add_data(): beg = datetime.datetime.now() db = Database() for i in range(1,10000): db.add_write('meituan','beijing',2013,i,1,i) db.batch_write() end = datetime.datetime.now() print end-beg if __name__ == '__main__': add_data() 以上代码插入了数据，那么现在用我们的服务器来访问一些数据。
import jsonimport redisimport tornado.webimport tornado.httpserverfrom tornado.options import define, options define("port", default=8888, type=int) class DealHandler(tornado.web.RequestHandler): def initialize(self): self.port = 6379 self.host = "localhost" def get(self): website = self.get_argument("website",None) city = self.get_argument("city",None) year = self.get_argument("year",None) month = self.get_argument("month",None) keyset = [] for i in range(1,31): key = '_'.join([website,city,year,month,str(i)]) keyset.append(key) r = redis.StrictRedis(host=self.host,port=self.port) self.write( json.dumps(r.mget(keyset)) ) class ExampleHandler(tornado.web.RequestHandler): def get(self): who = self.get_argument("who", None) if who: self.write("Hello, " + who) else: self.write("Hello World!") def post(self): who = self.get_argument("who", None) if who: self.write("Hello, " + who) else: self.write("Hello World!") class Application(tornado.web.Application): def __init__(self): handlers = [ (r"/", ExampleHandler), (r"/deal", DealHandler), ] settings = dict() tornado.web.Application.__init__(self, handlers, settings) def create_server(): tornado.options.parse_command_line() http_server = tornado.httpserver.HTTPServer(Application()) http_server.listen(options.port) tornado.ioloop.IOLoop.instance().start() if __name__ == "__main__": create_server() 以上代码实现了一个简单的服务器，用于处理http请求。
在浏览器中输入：
http://localhost:8888/deal?website=meituan&city=beijing&year=2013&month=9
即可得到需要的数据。
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