python使用urllib模块和pyquery实现阿里巴巴排名查询

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

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)

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