Python3中request模块访问网页以及客户端伪装

5t4we

                                                在python3中我们使用request模块访问一个网页，可以选择对文件的读写或者urllib.request.urlretrieve()方法将我们浏览的页面保存到本地。
方法1：
url_list=["[url=]http://www.bundcredit.com","http://www.baidu.com","http://www.winnerlook.com","http://www.winnertoke.com[/url]"]
for  urlinfo  in url_list:
    file=urllib.request.urlopen(urlinfo)
    data=file.read()
    with  open(str(urlinfo).split(".")[1]+".html","wb") as fileinfo:
        fileinfo.write(data)
方法2：
filename=urllib.request.urlretrieve("http://www.cniao5.com/course/sz.html",filename=str(fileline)
检查Web服务器Nginx的访问日志：
IP地址   时间   访问方法  访问协议  访问状态等
180.156.222.228 - - [26/Nov/2017:20:02:02 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
180.156.222.228 - - [26/Nov/2017:20:02:03 +0800] "GET / HTTP/1.1" 200 4462 "-" "Python-urllib/3.5" "-"
伪装其信息
import   urllib.request
import  re
url="http://www.bundcredit.com"
headers = ("User-Agent","Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0")
opener = urllib.request.build_opener()
opener.addheaders=[headers]
data=opener.open(url).read()
with  open( "1.html", "wb") as fileinfo:
    fileinfo.write(data)
伪装后的请求：
180.156.222.228 - - [26/Nov/2017:20:57:22 +0800] "GET / HTTP/1.1" 200 4462 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0" "-"
180.156.222.228 - - [26/Nov/2017:20:57:22 +0800] "GET / HTTP/1.1" 200 4462 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0" "-"
180.156.222.228 - - [26/Nov/2017:20:57:22 +0800] "GET / HTTP/1.1" 200 4462 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0" "-"
180.156.222.228 - - [26/Nov/2017:20:57:22 +0800] "GET / HTTP/1.1" 200 4462 "-" "Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:57.0) Gecko/20100101 Firefox/57.0" "-"