Funcy_cal 2018-10-06 06:43 采纳率: 0%
浏览 5058

爬取网页只能读取到“请刷新页面或按键盘F5”

以下是源码

 import urllib
from urllib import request
import re
import random
url = "http://x77558.net/bbs/thread.php?fid=6"

user_agent = [
    "Mozilla/5.0 (Macintosh; U; Intel Mac OS X 10_6_8; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50",

    "Mozilla/5.0 (Windows; U; Windows NT 6.1; en-us) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50",

    "Mozilla/5.0 (Windows NT 10.0; WOW64; rv:38.0) Gecko/20100101 Firefox/38.0",

    "Mozilla/5.0 (Windows NT 10.0; WOW64; Trident/7.0; .NET4.0C; .NET4.0E; .NET CLR 2.0.50727; .NET CLR 3.0.30729; .NET CLR 3.5.30729; InfoPath.3; rv:11.0) like Gecko",

    "Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; Trident/5.0)",

    "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; Trident/4.0)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 6.0)",

    "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1)",

    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:2.0.1) Gecko/20100101 Firefox/4.0.1",

    "Mozilla/5.0 (Windows NT 6.1; rv:2.0.1) Gecko/20100101 Firefox/4.0.1",

    "Opera/9.80 (Macintosh; Intel Mac OS X 10.6.8; U; en) Presto/2.8.131 Version/11.11",

    "Opera/9.80 (Windows NT 6.1; U; en) Presto/2.8.131 Version/11.11",

    "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_7_0) AppleWebKit/535.11 (KHTML, like Gecko) Chrome/17.0.963.56 Safari/535.11",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Maxthon 2.0)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; TencentTraveler 4.0)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; The World)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; SE 2.X MetaSr 1.0; SE 2.X MetaSr 1.0; .NET CLR 2.0.50727; SE 2.X MetaSr 1.0)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; 360SE)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Avant Browser)",

    "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)",

    "Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",

    "Mozilla/5.0 (iPod; U; CPU iPhone OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",

    "Mozilla/5.0 (iPad; U; CPU OS 4_3_3 like Mac OS X; en-us) AppleWebKit/533.17.9 (KHTML, like Gecko) Version/5.0.2 Mobile/8J2 Safari/6533.18.5",

    "Mozilla/5.0 (Linux; U; Android 2.3.7; en-us; Nexus One Build/FRF91) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",

    "MQQBrowser/26 Mozilla/5.0 (Linux; U; Android 2.3.7; zh-cn; MB200 Build/GRJ22; CyanogenMod-7) AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1",

    "Opera/9.80 (Android 2.3.4; Linux; Opera Mobi/build-1107180945; U; en-GB) Presto/2.8.149 Version/11.10",

    "Mozilla/5.0 (Linux; U; Android 3.0; en-us; Xoom Build/HRI39) AppleWebKit/534.13 (KHTML, like Gecko) Version/4.0 Safari/534.13",

    "Mozilla/5.0 (BlackBerry; U; BlackBerry 9800; en) AppleWebKit/534.1+ (KHTML, like Gecko) Version/6.0.0.337 Mobile Safari/534.1+",

    "Mozilla/5.0 (hp-tablet; Linux; hpwOS/3.0.0; U; en-US) AppleWebKit/534.6 (KHTML, like Gecko) wOSBrowser/233.70 Safari/534.6 TouchPad/1.0",

    "Mozilla/5.0 (SymbianOS/9.4; Series60/5.0 NokiaN97-1/20.0.019; Profile/MIDP-2.1 Configuration/CLDC-1.1) AppleWebKit/525 (KHTML, like Gecko) BrowserNG/7.1.18124",

    "Mozilla/5.0 (compatible; MSIE 9.0; Windows Phone OS 7.5; Trident/5.0; IEMobile/9.0; HTC; Titan)",

    "UCWEB7.0.2.37/28/999",

    "NOKIA5700/ UCWEB7.0.2.37/28/999",

    "Openwave/ UCWEB7.0.2.37/28/999",

    "Mozilla/4.0 (compatible; MSIE 6.0; ) Opera/UCWEB7.0.2.37/28/999",

    # iPhone 6:

    "Mozilla/6.0 (iPhone; CPU iPhone OS 8_0 like Mac OS X) AppleWebKit/536.26 (KHTML, like Gecko) Version/8.0 Mobile/10A5376e Safari/8536.25",
]


# read the url and return a list named page_data
def read_url(url,page_data,headers):
    req = urllib.request.Request(url, headers=headers)
    for i in range(3):
        web_data = urllib.request.urlopen(req).read()
        web_data = web_data.decode("gbk",errors = 'ignore')# the second parament can solver the problem that in 
    # error decode
    page_data.append(str(web_data))
    return page_data


# find taget in the page , used re , an return a list 
def find_tag(tagstr,idx,data,lists):
    lists.append(re.findall(tagstr,data[idx])) 
    return lists

# read the list to download the photo which type is jpg
def download_jpg(lists,path):
    for lis in lists:
        for l in lis:
            print(l)
            name = l.split("/")[-1]
            print(name)
            if ".jpg" or ".png" in l:
                if "js" in l:
                    continue
                elif "http" in l:
                    # sometimes met a missing name 403 , the solve is in the another file named download.py 
                    urllib.request.urlretrieve(l,path+name)
                else:
                    continue

tagstr = '<a title="开放主题" href="(.*?)"'

page_data = []
img_url_list = []
url_lsit = []
img_list = []

while len(page_data)==0 or page_data[-1]=="请刷新页面或按键盘F5":
    headers = {'User-Agent': random.choice(user_agent)}
    read_url(url,page_data,headers)
    print(page_data[-1])

  • 写回答

1条回答 默认 最新

  • lyhsdy 2018-10-24 02:08
    关注

    建议使用selenium模拟爬取

    评论

报告相同问题?

悬赏问题

  • ¥30 这是哪个作者做的宝宝起名网站
  • ¥60 版本过低apk如何修改可以兼容新的安卓系统
  • ¥25 由IPR导致的DRIVER_POWER_STATE_FAILURE蓝屏
  • ¥50 有数据,怎么建立模型求影响全要素生产率的因素
  • ¥50 有数据,怎么用matlab求全要素生产率
  • ¥15 TI的insta-spin例程
  • ¥15 完成下列问题完成下列问题
  • ¥15 C#算法问题, 不知道怎么处理这个数据的转换
  • ¥15 YoloV5 第三方库的版本对照问题
  • ¥15 请完成下列相关问题!