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python爬虫CSDN文章抓取

2014-05-27 20:14 387 查看
CSDN原则上不让非人浏览访问，正常爬虫无法从这里爬取文章，需要进行模拟人为浏览器访问。

使用：输入带文章的CSDN链接自动生成正文的HTML，文件名为标题名

#!/usr/bin/env python
# coding=utf-8
#########################################
#> File Name: CSDN_article.py
#> Author: nealgavin
#> Mail: nealgavin@126.com
#> Created Time: Tue 27 May 2014 03:42:54 PM CST
#########################################

import random
import socket
import urllib2
import urllib
import re
import string
import BeautifulSoup
import sys
import cookielib

ERROR = {
'0':'Can not open the url,checck you net',
'1':'Creat download dir error',
'2':'The image links is empty',
'3':'Download faild',
'4':'Build soup error,the html is empty',
'5':'Can not save the image to your disk',
}

class BrowserBase(object):
"""模拟浏览器"""
def __init__(self):
socket.setdefaulttimeout(20)
self.HTML = ''
self.articleName = ''
self.link = ''
def speak(self,name,content):
print '[%s]%s' %(name,content)

def openurl(self,url):
"""
打开网页
"""
cookie_support= urllib2.HTTPCookieProcessor(cookielib.CookieJar())
self.opener = urllib2.build_opener(cookie_support,urllib2.HTTPHandler)
urllib2.install_opener(self.opener)
user_agents = [
'Mozilla/5.0 (Windows; U; Windows NT 5.1; it; rv:1.8.1.11) Gecko/20071127 Firefox/2.0.0.11',
'Opera/9.25 (Windows NT 5.1; U; en)',
'Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.1; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)',
'Mozilla/5.0 (compatible; Konqueror/3.5; Linux) KHTML/3.5.5 (like Gecko) (Kubuntu)',
'Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8.0.12) Gecko/20070731 Ubuntu/dapper-security Firefox/1.5.0.12',
'Lynx/2.8.5rel.1 libwww-FM/2.14 SSL-MM/1.4.1 GNUTLS/1.2.9',
"Mozilla/5.0 (X11; Linux i686) AppleWebKit/535.7 (KHTML, like Gecko) Ubuntu/11.04 Chromium/16.0.912.77 Chrome/16.0.912.77 Safari/535.7",
"Mozilla/5.0 (X11; Ubuntu; Linux i686; rv:10.0) Gecko/20100101 Firefox/10.0 ",

]

agent = random.choice(user_agents)
self.opener.addheaders = [("User-agent",agent),("Accept","*/*"),('Referer','http://www.google.com')]
try:
res = self.opener.open(url)
self.HTML = res.read()
#            print res.read()
except Exception,e:
self.speak(str(e),url)
raise Exception
else:
return res
def OUT(self):
print self.HTML

def getArticleName(self,tags):

re_rules = r'<span class="(.+?)"><a href="(.+?)">(.+?)</a>'
p = re.compile(re_rules,re.DOTALL)
title = p.findall(str(tags))
self.chineseListOut(title)

def chineseListOut(self,tags):
title = []
for tag in tags:
for ele in tag:
#                print '+',str(ele),'-'
title.append(ele.strip())
self.link = "http://blog.csdn.net" + title[1]
tle = title[2].split()
self.articleName = '-'.join(tle)

def buildArticleHTML(self):
self.HTML = str(self.HTML)
self.HTML = '<html><meta charset="utf-8"><body>'+self.HTML
self.HTML = self.HTML + '</body><html>'

def getMainArticle(self):
"""get the main article of CSDN blog"""
soup = BeautifulSoup.BeautifulSoup(self.HTML)
tags_all = soup.findAll('div',{'class':'article_title'})
self.getArticleName(tags_all)
tags_all = soup.findAll('div',{'id':'article_content','class':'article_content'})
self.HTML = tags_all[0]
self.buildArticleHTML()

def saveArticleAsHTML(self):
filePath = self.articleName+'.html'
try:

filePointer = open(filePath,'w+')
except:
print 'open error'
print 'path = ',filePath
filePointer.write(self.HTML)
filePointer.close()

browser = BrowserBase()
url = raw_input('Input the links of CSDN article you needed!\n')
if url is None or len(url) == 0:
url = "http://blog.csdn.net/nealgavin/article/details/27110717"
browser.openurl(url)
browser.getMainArticle()
browser.saveArticleAsHTML()
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