本文實例講述了python實現批量下載新浪博客的方法。分享給大家供大家參考。具體實現方法如下：
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# coding=utf-8 import urllib2import sys, osimport reimport stringfrom BeautifulSoup import BeautifulSoupdef encode(s): return s.decode('utf-8').encode(sys.stdout.encoding, 'ignore')def getHTML(url): #proxy_handler = urllib2.ProxyHandler({'http':'http://211.138.124.211:80'}) #opener = urllib2.build_opener(proxy_handler) #urllib2.install_opener(opener) req = urllib2.Request(url) response = urllib2.urlopen(req, timeout=15) return BeautifulSoup(response, convertEntities=BeautifulSoup.HTML_ENTITIES)def visible(element): '''抓取可見的文本元素''' if element.parent.name in ['style', 'script', '[document]', 'head', 'title']: return False elif re.match('<!--.*-->', str(element)): return False elif element == u'\xa0': return False return Truedef delReturn(element): '''刪除元素內的換行''' return re.sub('(?<!^)\n+(?!$)', ' ', str(element)).decode('utf-8')def validFilename(filename): # windows return re.sub('[\/:*?<>"|\xa0]', '', filename)def writeToFile(text, filename, dirname): if not os.path.exists(dirname): os.makedirs(dirname) print encode('保存到目錄'), dirname filename = validFilename(filename) print encode('保存文章'), filename path = os.path.join(dirname, filename) if not os.path.exists(path): f = open(path, 'w') f.write(text) f.close() else: print filename, encode('已經存在')def formatContent(url, title=''): '''格式化文章內容''' page = getHTML(url) content = page.find('div', {'class':'articalContent'}) art_id = re.search('blog_(\w+)\.html', url).group(1) blog_name = page.find('span', id='blognamespan').string if title == '': title = page.find('h2', id=re.compile('^t_')).string temp_data = filter(visible, content.findAll(text=True)) # 去掉不可見元素 temp_data = ''.join(map(delReturn, temp_data)) # 刪除元素內的換行符 temp_data = temp_data.strip() # 刪除文章首尾的空行 temp_data = re.sub('\n{2,}', '\n\n', temp_data) # 刪除文章內過多的空行 # 輸出到文件 # 編碼問題 temp_data = '本文地址:'.decode('utf-8') + url + '\n\n' + temp_data op_text = temp_data.encode('utf-8') op_file = title + '_' + art_id +'.txt' writeToFile(op_text, op_file, blog_name)def articlelist(url): articles = {} page = getHTML(url) pages = page.find('ul', {'class':'SG_pages'}).span.string page_num = int(re.search('(\d+)', pages).group(1)) for i in range(1, page_num+1): print encode('生成第%d頁文章索引'%i) if i != 1: url = re.sub('(_)\d+(\.html)$', '\g<1>'+str(i)+'\g<2>', url) page = getHTML(url) article = page.findAll('span', {'class':'atc_title'}) for art in article: art_title = art.a['title'] art_href = art.a['href'] articles[art_title] = art_href return articlesdef blog_dld(articles): if not isinstance(articles, dict): return False print encode('開始下載文章') for art_title, art_href in articles.items(): formatContent(art_href, art_title)if __name__ == '__main__': sel = raw_input(encode('你要下載的是(1)全部文章還是(2)單篇文章，輸入1或者2: ')) if sel == '1': #articlelist_url = 'http://blog.sina.com.cn/s/articlelist_1303481411_0_1.html' articlelist_url = raw_input(encode('請輸入博客文章目錄鏈接: ')) articles = articlelist(articlelist_url) blog_dld(articles) else: #article_url = 'http://blog.sina.com.cn/s/blog_4db18c430100gxc5.html' article_url = raw_input(encode('請輸入博客文章鏈接: ')) formatContent(article_url) |
希望本文所述對大家的Python程序設計有所幫助。
