Python urllib、urllib2、httplib抓取网页代码实例

 #!/usr/bin/python # -*- coding:utf-8 -*- # urllib2_test.py # author: wklken # 2012-03-17 [email protected] import urllib,urllib2,cookielib,socket url = "http://www.testurl....." #change yourself #最简单方式 def use_urllib2(): try: f = urllib2.urlopen(url, timeout=5).read() except urllib2.URLError, e: print e.reason print len(f) #使用Request def get_request(): #可以设置超时 socket.setdefaulttimeout(5) #可以加入参数 [无参数，使用get，以下这种方式，使用post] params = {"wd":"a","b":"2"} #可以加入请求头信息，以便识别 i_headers = {"User-Agent": "Mozilla/5.0 (Windows; U; Windows NT 5.1; zh-CN; rv:1.9.1) Gecko/20090624 Firefox/3.5", "Accept": "text/plain"} #use post,have some params post to server,if not support ,will throw exception #req = urllib2.Request(url, data=urllib.urlencode(params), headers=i_headers) req = urllib2.Request(url, headers=i_headers) #创建request后，还可以进行其他添加,若是key重复，后者生效 #request.add_header('Accept','application/json') #可以指定提交方式 #request.get_method = lambda: 'PUT' try: page = urllib2.urlopen(req) print len(page.read()) #like get #url_params = urllib.urlencode({"a":"1", "b":"2"}) #final_url = url + "?" + url_params #print final_url #data = urllib2.urlopen(final_url).read() #print "Method:get ", len(data) except urllib2.HTTPError, e: print "Error Code:", e.code except urllib2.URLError, e: print "Error Reason:", e.reason def use_proxy(): enable_proxy = False proxy_handler = urllib2.ProxyHandler({"http":"http://proxyurlXXXX.com:8080"}) null_proxy_handler = urllib2.ProxyHandler({}) if enable_proxy: opener = urllib2.build_opener(proxy_handler, urllib2.HTTPHandler) else: opener = urllib2.build_opener(null_proxy_handler, urllib2.HTTPHandler) #此句设置urllib2的全局opener urllib2.install_opener(opener) content = urllib2.urlopen(url).read() print "proxy len:",len(content) class NoExceptionCookieProcesser(urllib2.HTTPCookieProcessor): def http_error_403(self, req, fp, code, msg, hdrs): return fp def http_error_400(self, req, fp, code, msg, hdrs): return fp def http_error_500(self, req, fp, code, msg, hdrs): return fp def hand_cookie(): cookie = cookielib.CookieJar() #cookie_handler = urllib2.HTTPCookieProcessor(cookie) #after add error exception handler cookie_handler = NoExceptionCookieProcesser(cookie) opener = urllib2.build_opener(cookie_handler, urllib2.HTTPHandler) url_login = "https://www.yourwebsite/?login" params = {"username":"user","password":"111111"} opener.open(url_login, urllib.urlencode(params)) for item in cookie: print item.name,item.value #urllib2.install_opener(opener) #content = urllib2.urlopen(url).read() #print len(content) #得<div style="color:transparent">来源gaodai.ma#com搞#代!码网</div>到重定向 N 次以后最后页面URL def get_request_direct(): import httplib httplib.HTTPConnection.debuglevel = 1 request = urllib2.Request("http://www.google.com") request.add_header("Accept", "text/html,*/*") request.add_header("Connection", "Keep-Alive") opener = urllib2.build_opener() f = opener.open(request) print f.url print f.headers.dict print len(f.read()) if __name__ == "__main__": use_urllib2() get_request() get_request_direct() use_proxy() hand_cookie()