Tornado(二)异步web

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异步web请求

测试工具

Siege utility

从同步开始

#coding=utf-8import tornado.httpserverimport tornado.ioloopimport tornado.optionsimport tornado.webimport tornado.httpclientfrom tornado.options import define, optionsdefine("port", default=8000, help="run on the given port", type=int)#接受命令行形式的一些参数class IndexHandler(tornado.web.RequestHandler):    def get(self):        client = tornado.httpclient.HTTPClient()        response = client.fetch("http://www.baidu.com")        # 同步的相当于request        self.write(response.body)if __name__ == "__main__":    tornado.options.parse_command_line()    #处理命令行    app = tornado.web.Application(handlers=[(r"/", IndexHandler)])    #实例化application    http_server = tornado.httpserver.HTTPServer(app)    http_server.listen(options.port)    tornado.ioloop.IOLoop.instance().start()

同步测试结果

Transactions:                114 hitsAvailability:             100.00 %Elapsed time:               9.99 secsData transferred:           2.58 MBResponse time:              0.60 secsTransaction rate:          11.41 trans/secThroughput:             0.26 MB/secConcurrency:                6.80Successful transactions:         114Failed transactions:               0Longest transaction:            4.67Shortest transaction:           0.01

基础异步调用

class IndexHandler(tornado.web.RequestHandler):    @tornado.web.asynchronous    def get(self):        client = tornado.httpclient.AsyncHTTPClient()        client.fetch("http://www.baidu.com",                callback=self.on_response)    def on_response(self, response):        self.write(response.body)        self.finish()

异步测试结果

Transactions:                771 hitsAvailability:              99.87 %Elapsed time:               9.60 secsData transferred:          17.54 MBResponse time:              0.08 secsTransaction rate:          80.31 trans/secThroughput:             1.83 MB/secConcurrency:                6.60Successful transactions:         771Failed transactions:               1Longest transaction:            0.92Shortest transaction:           0.01

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