Python通过解析网页实现看报程序的方法

# 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'.+'

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://imageS+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!"