python tornado 框架使用 （5）

(5)自己的handler，也就是对应url的处理函数

my_handler.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

import sys 
import os
import json
import time
import logging
from unipath import Path
import traceback
import tornado.httpserver   
import tornado.ioloop   
import tornado.options   
import tornado.web   
import tornado.gen   
import urllib
import urllib2
import zlib

from tornado.options import define, options   
from tornado.httpclient import AsyncHTTPClient
from tornado.web import HTTPError
from tornado.iostream import StreamClosedError

import common_logging
import common_urllib
from common_conf import g_conf

logger = logging.getLogger(__name__)


class MyHandler(tornado.web.RequestHandler):

    @tornado.web.asynchronous
    @tornado.gen.coroutine
    def get(self):
        error_string = ""
        res=""
        try:
            # 获取url中的参数
            parm = self.get_argument("parm", "") 
            res = parm
        except:
            logger.error("%s" % traceback.format_exc());
            error_string = "error"
        finally:
            logger.error("[url] request[%s] time[%s] error[%s] " % ( \
                    self.request.uri, \
                    self.request.request_time(), \
                    error_string \
                ))
            #输出返回结果
            self.write(res)
            self.finish()

    @tornado.web.asynchronous
    @tornado.gen.coroutine
    def post(self):
        error_string = ""
        res=''
        try:
            data = self.request.body
            res = data
        except:
            logger.error("%s" % traceback.format_exc());
            gaode_fetch_time = time.time() - gaode_start_time
            error_string = "cycle curl fail"
        finally:
            logger.error("[url] request[%s] data:[%s] time[%s] error[%s]" % ( \
                    self.request.uri, \
                    data, \
                    self.request.request_time(), \
                    error_string
                ))

            self.write(res)
            self.finish()

如果请求中需要在线抓取其他服务，则可使用tornado框架的代理抓取。

 75             client = AsyncHTTPClient()
 76             my_response = ""
 80             start_time = time.time()
 81             try:
 82                 my_response = yield client.fetch(url, method="POST", body=data, \
 83                     request_timeout = float(200))
 84             except:
 86                 gaode_response = ""
 87             fetch_time = time.time() - start_time
 88 
 89             if gaode_response and gaode_response.code == 200:
 90                 str_res = gaode_response.body