Python制作爬虫采集小说

import urllib.request
import http.cookiejar

import socket
import time
import re

timeout = 20
socket.setdefaulttimeout(timeout)

sleep_download_time = 10
time.sleep(sleep_download_time)
 
def makeMyOpener(head = {
 'Connection': 'Keep-Alive','Accept': 'text/html,application/xhtml+xml,*/*','Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3','User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
}):
 cj = http.cookiejar.CookieJar()
 opener = urllib.request.build_opener(urllib.request.HTTPCookieProcessor(cj))
 header = []
 for key,value in head.items():
  elem = (key,value)
  header.append(elem)
 opener.addheaders = header
 return opener
 
def saveFile(save_path,txts):
 f_obj = open(save_path,'w+')
 for item in txts:
  f_obj.write(item+'n')
 f_obj.close()
 
#get_code_list
code_list='http://www.cishuge.com/read/0/771/'
oper = makeMyOpener()
uop = oper.open(code_list,timeout=1000)
data = uop.read().decode('gbk','ignore')

pattern = re.compile('<li><a href="(.*?)".*?>(.*?)</a></li>',re.S)

items = re.findall(pattern,data)

print ('获取列表完成')
url_path='url_file.txt'

url_r=open(url_path,'r')
url_arr=url_r.readlines(100000)
url_r.close()
print (len(url_arr))

url_file=open(url_path,'a')

print ('获取已下载网址')

for tmp in items:
 save_path = tmp[1].replace(' ','')+'.txt'
 url = code_list+tmp[0]
 if url+'n' in url_arr:
  continue
 print('写日志：'+url+'n')
 url_file.write(url+'n')
 opene = makeMyOpener()
 op1 = opene.open(url,timeout=1000)
 data = op1.read().decode('gbk','ignore')
 opene.close()
 pattern = re.compile('    (.*?)<br />',re.S)
 txts = re.findall(pattern,data)
 saveFile(save_path,txts)
 
url_file.close()