更新换代之requests库

      好久不更新博客了。。。

之前的博文都是通过urllib2进行http访问，接下来我要说一个利器啊！requests模块，无法用语言对他进行赞扬了，需要的，有兴趣的，可以去了解下，移步官方中文文档：

Requests: 让 HTTP 服务人类

简直是不要太刁。。。

      这篇博文呢，主要是将之前博文中用urllib2写的HttpClient类换成request。代码如下：

# coding=utf-8
from __future__ import unicode_literals
import requests
from io import StringIO


class HttpClient:
    def __init__(self):
        pass
    __headers = {
        'User-Agent': 'Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0',
        'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
        # 'Host':'www.xiami.com'
        }
    __proxies = {
          # "http": "http://10.10.1.10:3128",
          # "https": "http://10.10.1.10:1080",
        }

    def get(self, url, params=None, retries=3):
        try:
            req = requests.get(url, headers=self.__headers, timeout=30, params=params,
                               proxies=self.__proxies)
            req.raise_for_status()
            return req.text
        except Exception,e:
            print e
            if retries > 0:
                return self.get(url, params, retries - 1)
            else:
                print "Get Failed", url
                return ''

    def post(self, url, data=None, retires=3):
        try:
            req = requests.post(url, headers=self.__headers, timeout=30, data=data,
                                proxies=self.__proxies)
            req.raise_for_status()
            return req.text
        except Exception,e:
            print e
            if retires > 0:
                return self.post(url,data,retires - 1)
            else:
                print "Post Failed", url
                return ''

    def download(self, url, file_name, params=None, cookies=None):
        try:
            req = requests.get(url, headers=self.__headers, params=params,
                               proxies=self.__proxies)
            output = open(file_name, 'wb')
            output.write(req.content)
            output.close()
        except Exception,e:
            print 'error',e

    def get_cookies(self, url, key, params=None):
        try:
            req = requests.get(url, headers=self.__headers, timeout=30, params=params,
                               proxies=self.__proxies)
            req.raise_for_status()
            return req.cookies.get(key,'')
        except Exception,e:
            return ''

    def get_headers(self, url, key, params=None):
        try:
            req = requests.get(url, headers=self.__headers, timeout=30, params=params,
                               proxies=self.__proxies)
            req.raise_for_status()
            return req.headers.get(key)
        except Exception,e:
            return ''

　　记录一下，后面会时常更新博文的。