tornado系列四:web请求

标签：

1、同步请求

import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import tornado.httpclient

import urllib
import json
import datetime
import time

from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)

class IndexHandler(tornado.web.RequestHandler):
    def get(self):
        query = self.get_argument(‘q‘)
        client = tornado.httpclient.HTTPClient()
        response = client.fetch("http://search.twitter.com/search.json?" +                 urllib.urlencode({"q": query, "result_type": "recent", "rpp": 100}))
        body = json.loads(response.body)
        result_count = len(body[‘results‘])
        now = datetime.datetime.utcnow()
        raw_oldest_tweet_at = body[‘results‘][-1][‘created_at‘]
        oldest_tweet_at = datetime.datetime.strptime(raw_oldest_tweet_at,
                "%a, %d %b %Y %H:%M:%S +0000")
        seconds_diff = time.mktime(now.timetuple()) -                 time.mktime(oldest_tweet_at.timetuple())
        tweets_per_second = float(result_count) / seconds_diff
        self.write("""
<div style="text-align: center">
    <div style="font-size: 72px">%s</div>
    <div style="font-size: 144px">%.02f</div>
    <div style="font-size: 24px">tweets per second</div>
</div>""" % (query, tweets_per_second))

if __name__ == "__main__":
    tornado.options.parse_command_line()
    app = tornado.web.Application(handlers=[(r"/", IndexHandler)])
    http_server = tornado.httpserver.HTTPServer(app)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import tornado.httpclient

import urllib
import json
import datetime
import time

from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)

class IndexHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous    #保证在函数返回后，连接不立即关闭，待异步处理完毕后手动关闭连接
    def get(self):
        query = self.get_argument(‘q‘)
        client = tornado.httpclient.AsyncHTTPClient()
        client.fetch("http://search.twitter.com/search.json?" +                 urllib.urlencode({"q": query, "result_type": "recent", "rpp": 100}),
                callback=self.on_response)    #设置response返回后的回调函数

    def on_response(self, response):
        body = json.loads(response.body)
        result_count = len(body[‘results‘])
        now = datetime.datetime.utcnow()
        raw_oldest_tweet_at = body[‘results‘][-1][‘created_at‘]
        oldest_tweet_at = datetime.datetime.strptime(raw_oldest_tweet_at,
                "%a, %d %b %Y %H:%M:%S +0000")
        seconds_diff = time.mktime(now.timetuple()) -                 time.mktime(oldest_tweet_at.timetuple())
        tweets_per_second = float(result_count) / seconds_diff
        self.write("""
<div style="text-align: center">
    <div style="font-size: 72px">%s</div>
    <div style="font-size: 144px">%.02f</div>
    <div style="font-size: 24px">tweets per second</div>
</div>""" % (self.get_argument(‘q‘), tweets_per_second))
        self.finish()    #手动关闭连接

if __name__ == "__main__":
    tornado.options.parse_command_line()
    app = tornado.web.Application(handlers=[(r"/", IndexHandler)])
    http_server = tornado.httpserver.HTTPServer(app)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

import tornado.httpserver
import tornado.ioloop
import tornado.options
import tornado.web
import tornado.httpclient
import tornado.gen

import urllib
import json
import datetime
import time

from tornado.options import define, options
define("port", default=8000, help="run on the given port", type=int)

class IndexHandler(tornado.web.RequestHandler):
    @tornado.web.asynchronous
    @tornado.gen.engine
    def get(self):
        query = self.get_argument(‘q‘)
        client = tornado.httpclient.AsyncHTTPClient()
        response = yield tornado.gen.Task(client.fetch,
                "http://search.twitter.com/search.json?" +                 urllib.urlencode({"q": query, "result_type": "recent", "rpp": 100}))
        body = json.loads(response.body)
        result_count = len(body[‘results‘])
        now = datetime.datetime.utcnow()
        raw_oldest_tweet_at = body[‘results‘][-1][‘created_at‘]
        oldest_tweet_at = datetime.datetime.strptime(raw_oldest_tweet_at,
                "%a, %d %b %Y %H:%M:%S +0000")
        seconds_diff = time.mktime(now.timetuple()) -                 time.mktime(oldest_tweet_at.timetuple())
        tweets_per_second = float(result_count) / seconds_diff
        self.write("""
<div style="text-align: center">
    <div style="font-size: 72px">%s</div>
    <div style="font-size: 144px">%.02f</div>
    <div style="font-size: 24px">tweets per second</div>
</div>""" % (query, tweets_per_second))
        self.finish()

if __name__ == "__main__":
    tornado.options.parse_command_line()
    app = tornado.web.Application(handlers=[(r"/", IndexHandler)])
    http_server = tornado.httpserver.HTTPServer(app)
    http_server.listen(options.port)
    tornado.ioloop.IOLoop.instance().start()

tornado系列四:web请求

标签：

原文地址：http://blog.csdn.net/midion9/article/details/51329112