from urllib import request,parse
from urllib.error import HTTPError,URLError
from http import cookiejar
class session(object):
def __init__(self):
#保存cookie
cookie_object = cookiejar.CookieJar()
#handler 对应着操作
handler = request.HTTPCookieProcessor(cookie_object)
#调用handler内部的函数 存储到cookie object
self.opener = request.build_opener(handler)
#定义get方法传递opener
def get(self,url,headers=None):
return get(url,headers,self.opener)
#定义post方法传递opener
def post(self,url,form,headers=None):
return post(url,form,headers,self.opener)
#get方式
def get(url,headers=None,opener=None):
return urlrequest(url,headers=headers,opener=opener)
#post方式
def post(url,form,headers=None,opener=None):
return urlrequest(url,form,headers=headers,opener=opener)
def urlrequest(url,form=None,headers=None,opener=None):
user_agent = 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36'
if headers==None:
headers = {
'User-Agent':user_agent
}
html_bytes = b''
try:
if form:
form_str = parse.urlencode(form,encoding='utf-8')
form_bytes = form_str.encode('utf-8')
req = request.Request(url,data=form_bytes,headers=headers)
else:
req = request.Request(url,headers=headers)
if opener:
response = opener.open(req)
else:
response = request.urlopen(req)
html_bytes = response.read()
except HTTPError as e:
print(e)
except URLError as e:
print(e)
return html_bytes
if __name__ == '__main__':
url = 'http://www.baidu.com'
html_byte = get(url)
print(html_byte)
完善get和post方式爬取网页 增加cookie可模拟登录
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转载自blog.csdn.net/weixin_38920937/article/details/81674174
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