欢迎您访问程序员文章站本站旨在为大家提供分享程序员计算机编程知识!
您现在的位置是: 首页  >  IT编程

Python通过解析网页实现看报程序的方法

程序员文章站 2022-05-25 18:45:51
本文所述实例可以实现基于python的查看图片报纸《参考消息》并将当天的图片报纸自动下载到本地供查看的功能,具体实现代码如下: # coding=gbk imp...

本文所述实例可以实现基于python的查看图片报纸《参考消息》并将当天的图片报纸自动下载到本地供查看的功能,具体实现代码如下:

# coding=gbk
import urllib2
import socket
import re
import time
import os

# timeout in seconds
#timeout = 10
#socket.setdefaulttimeout(timeout)
timeout = 10
urllib2.socket.setdefaulttimeout(timeout)

home_url = "http://www.hqck.net"
home_page = ""
try:
  home_page_context = urllib2.urlopen(home_url)
  home_page = home_page_context.read()

  print "read home page finishd."
  print "-------------------------------------------------"
except urllib2.urlerror,e:
  print e.code
  exit()
except:
  print e.code
  exit()

reg_str = r'<a class="item-baozhi" href="/arc/jwbt/ckxx/\d{4}/\d{4}/\w+\.html" rel="external nofollow" ><span class.+>.+</span></a>'

news_url_reg = re.compile(reg_str)

today_cankao_news = news_url_reg.findall(home_page)

if len(today_cankao_news) == 0:
  print "cannot find today's news!"
  exit()

my_news = today_cankao_news[0]
print "latest news link = " + my_news
print

url_s = my_news.find("/arc/")
url_e = my_news.find(".html")
url_e = url_e + 5

print "link index = [" + str(url_s) + "," + str(url_e) + "]"
my_news = my_news[url_s:url_e]
print "part url = " + my_news

full_news_url = home_url + my_news
print "full url = " + full_news_url
print

image_folder = "e:\\new_folder\\"

if (os.path.exists(image_folder) == false):
  os.makedirs(image_folder)
today_num = time.strftime('%y-%m-%d',time.localtime(time.time()))
image_folder = image_folder + today_num + "\\"
if (os.path.exists(image_folder) == false):
  os.makedirs(image_folder)
print "news image folder = " + image_folder
print

context_uri = full_news_url[0:-5]

first_page_url = context_uri + ".html"
try:
  first_page_context = urllib2.urlopen(first_page_url)
  first_page = first_page_context.read()
except urllib2.httperror, e:
  print e.code
  exit()

tot_page_index = first_page.find("共")
tot_page_index = tot_page_index

tmp_str = first_page[tot_page_index:tot_page_index+10]
end_s = tmp_str.find("页")

page_num = tmp_str[2:end_s]
print page_num

page_count = int(page_num)
print "total " + page_num + " pages:"
print

page_index = 1
download_suc = true
while page_index <= page_count:
  page_url = context_uri
  if page_index > 1:
    page_url = page_url + "_" + str(page_index)
  page_url = page_url + ".html"
  print "news page link = " + page_url

  try:
    news_img_page_context = urllib2.urlopen(page_url)
  except urllib2.urlerror,e:
    print e.reason
    download_suc = false
    break
  
  news_img_page = news_img_page_context.read()

  #f = open("e:\\page.html", "w")
  #f.write(news_img_page)
  #f.close()

  reg_str = r'http://image\s+jpg'
  image_reg = re.compile(reg_str)
  image_results = image_reg.findall(news_img_page)
  if len(image_results) == 0:
    print "cannot find news page" + str(page_index) + "!"
    download_suc = false
    break
  
  image_url = image_results[0]

  print "news image url = " + image_url
  news_image_context = urllib2.urlopen(image_url)

  image_name = image_folder + "page_" + str(page_index) + ".jpg"
  imgf = open(image_name, 'wb')
  print "getting image..."
  try:
    while true:
      date = news_image_context.read(1024*10)
      if not date:
        break
      imgf.write(date)
    imgf.close()
  except:
    download_suc = false
    print "save image " + str(page_index) + " failed!"
    print "unexpected error: " + sys.exc_info()[0] + sys.exc_info()[1]
  else:
    print "save image " + str(page_index) + " succeed!"
    print
  page_index = page_index + 1

if download_suc == true:
  print "news download succeed! path = \"" + str(image_folder) + "\""
  print "enjoy it! ^^"
else:
  print "news download failed!"