get和post ，保存cookie

from urllib import request,parse


def get(url,headers=None):
    return urlrequests(url,headers=headers)

def post(url,form,headers=None):
    return urlrequests(url,form,headers=headers)
#1,传入url
#2.user-agent
#3.headers
#4.定义request
#5.urlopen
#6.返回bytes数组
def urlrequests(url,form=None,headers=None):

    from http import cookiejar
    cookie = cookiejar.CookieJar()
    handler = request.HTTPCookieProcessor(cookie)
    opener = request.build_opener(handler)

    #如果需要用户自行传入headers则覆盖当前的headers
    if headers == None:
        headers = {
            ‘User-Agent‘: ‘Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.106 Safari/537.36‘,
        }
    html_bytes = b‘‘
    try:
        if form:
            # POST
            #先转成str再转成bytes
            form_bytes = parse.urlencode(form).encode(‘utf-8‘)

            req = request.Request(url,data=form_bytes,headers=headers)
        else:
            #GET
            req = request.Request(url,headers=headers)

        response = opener.open(req)
        html_bytes = response.read()
    except:
        pass

    return html_bytes

if __name__ == ‘__main__‘:
    url = ‘http://www.baidu.com‘
    ss = get(url)
    print(ss)