#爬蟲的post方式
作用：對引數進行打包反饋給伺服器

import urllib.request
import urllib.parse           #對引數打包
url = "http://www.sunck.wang:8085/form"
data = {
    "username":"sunck",
    "passwd":"123"
}
postdata = urllib.parse.urlencode(data).encode("utf-8")   #對data打包合成一個字典
#建立請求體
req = urllib.request.Request(url,data=postdata)
#發起請求,對req新增一個請求頭
req.add_header("User-Agent","Mozilla/5.0 (Windows NT 6.1; WOW64; rv:34.0) Gecko/20100101 Firefox/34.0")
response = urllib.request.urlopen(req)
print(response.read().decode("utf-8"))
 

#抓取動態頁面

def AjaxDemo(url) :
    headers ={
     "User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36"
    }
    req = urllib.request.Request(url,headers=headers)
    context =ssl._create_unverified_context()          #使用ssl建立未驗證的上下資料
    response = urllib.request.urlopen(req,context)
    JsonStr = response.read().decode("utf-8")
    data = json.loads(JsonStr)
    return data
url = "movie.douban.com/動態/"  #模擬動態url
print(AjaxDemo(url))