urllib基础模块的应用，通过该类获取到url中的html文档信息，内部可以重写代理的获取方法

复制代码 代码如下:
class ProxyScrapy(object):
    def __init__(self):
        self.proxy_robot = ProxyRobot()
        self.current_proxy = None
        self.cookie = cookielib.CookieJar()

    def __builder_proxy_cookie_opener(self):       
        cookie_handler = urllib2.HTTPCookieProcessor(self.cookie)       
        handlers = [cookie_handler]

        if PROXY_ENABLE:
            self.current_proxy = ip_port = self.proxy_robot.get_random_proxy()
            proxy_handler = urllib2.ProxyHandler({\’http\’: ip_port[7:]})
            handlers.append(proxy_handler)

        opener = urllib2.build_opener(*handlers)
        urllib2.install_opener(opener)
        return opener

    def get_html_body(self,url):
        opener = self.__builder_proxy_cookie_opener()

        request=urllib2.Request(url)
        #request.add_header(\”Accept-Encoding\”, \”gzip,deflate,sdch\”)
        #request.add_header(\”Accept\”, \”text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8\”)
        #request.add_header(\”Cache-Control\”, \”no-cache\”)
        #request.add_header(\”Connection\”, \”keep-alive\”)

        try:
            response = opener.open(request,timeout=2)

            http_code = response.getcode()
            if http_code == 200:
                if PROXY_ENABLE:
                    self.proxy_robot.handle_success_proxy(self.current_proxy)
                html = response.read()
                return html
            else:
                if PROXY_ENABLE:
                    self.proxy_robot.handle_double_proxy(self.current_proxy)
                return self.get_html_body(url)
        except Exception as inst:
            print inst,self.current_proxy
            self.proxy_robot.handle_double_proxy(self.current_proxy)
            return self.get_html_body(url)