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使用Python爬取mobi格式电纸书
最近做了个微信推送kindle电子书的公众号：kindle免费书库
不过目前电子书不算非常多，所以需要使用爬虫来获取足够书籍。
于是，写了以下这个爬虫，来爬取kindle114的电子书。
值得注意的地方：
当爬取数过大时，由于对方有开启放抓取，会返回一个javascript而非原始的html，所以我使用
的PyV8来执行这段js从而拿到真正的地址。
目前存在的问题：
正则式写得还不够好，毕竟是第一次正式写爬虫：）
无法下载需要购买的附件
爬虫为单线程，爬完整个网站速度慢。我有试过转成多进程，但是貌似由于不能同时登陆，大多数
爬虫进程都无法正常爬取@@
# -*- coding: utf-8 -*-import urllib2import reimport requestsimport osimport hashlibdef fuckJS(js): import PyV8 import re #去掉<script>标签 js=js[31:-9] for st in [‘window‘,‘location‘,"‘assign‘","‘href‘","‘replace‘"]: equal=re.findall(‘[_A-Za-z0-9 =]+%s;‘%st,js)#找到变量赋值等式 if equal==[]:#有可能没有 continue else: equal=equal[0] var=equal.split(‘=‘)[0].strip()#找出变量名 #把等式干掉 js=js.replace(equal,‘‘) #把变量替换成它真正的意思 js=js.replace(var,st) #把[‘xx‘] 替换成 .xx js=js.replace("[‘%s‘]"%st.strip("‘"),‘.%s‘%st.strip("‘")) #将 window.href= http://www.mamicode.com/后的内容踢掉，因为当PyV8只输出最后一个等式的值 if re.findall(‘window\.href=http://www.mamicode.com/.+‘,js)!=[]: js=js.replace(re.findall(‘window\.href=http://www.mamicode.com/.+‘,js)[0],‘‘) #删掉location.xxx= js=js.replace(‘location.href=http://www.mamicode.com/‘,‘‘).replace(‘location.replace‘,‘‘).replace(‘location.assign‘,‘‘) #交给你了-v- ctxt2 = PyV8.JSContext() ctxt2.enter() #print ctxt2.eval(js) trueAddr = ctxt2.eval(js) print trueAddr return trueAddrdef downloadMobi(name, url): #去掉windows下不合法的文件名 unlawName = ‘<>/\\|:""*?‘ for i in unlawName: name = name.replace(i, ‘‘) #正则表达式写的不够好导致的问题@@ if name.count(‘ img src=http://www.mamicode.com/templateyeei_dream1cssyeeidigest_1.gif class=vm alt= title= ‘) > 0: name = name.split(‘  ‘)[0]+‘.mobi‘ #避免重复下载 if os.path.exists(‘D:\Kindle114SpiderDownload\\‘ + name): print ‘already have‘, name return url = url.split(‘ ‘)[0] s = requests.session() username = ‘你的用户名‘ password = ‘你的密码‘ passwordMd5 = hashlib.md5(password).hexdigest() data = {‘formhash‘: ‘23cd6c29‘, ‘referer‘: ‘‘,‘username‘: username, ‘password‘: passwordMd5, ‘questionid‘:‘0‘, ‘answer‘:‘‘} res=s.post(‘http://www.kindle114.com/member.php?mod=logging&action=login&loginsubmit=yes&loginhash=LYn7n&inajax=1‘,data) #res = s.get(‘http://www.kindle114.com/forum.php?mod=attachment&aid=MTQ2NTB8ZjhkNjY3NmF8MTQxNjg5OTYxOXw0NDIxfDczNjI%3D‘) try: res = s.get(url, timeout = 200) except: print ‘time out for ‘, name #print ‘content[:50]‘ #print res.content[:50] if res.content.count(‘<!DOCTYPE html‘) > 0: print ‘!!!!!!!!!!!!!!!!!not a mobi, this file need gold coin!!!!!!!!!!!!!!!‘ return try: with open(‘D:\\Kindle114SpiderDownload\\‘ + name, "wb") as code: code.write(res.content) except: print ‘!!!!!!!!!!!!!!!!!!!!!遇到不合法文件名!!!!!!!!!!!!!!!!!!‘, namedef spiderThread(url, threadName): req = urllib2.urlopen(url, timeout = 10) text = req.read() if text.count(‘<!DOCTYPE html‘) == 0: js = text trueURL = ‘http://www.kindle114.com/‘ + fuckJS(js) print ‘trueURL‘, trueURL req = urllib2.urlopen(trueURL) text = req.read() #href = http://www.mamicode.com/‘ href = http://www.mamicode.com/‘<a href="http://www.mamicode.com/(.*?)".*?target="_blank">(.*?)</a>‘ href_re = re.compile(href) href_info = href_re.findall(text) bookSum = 0 for i in href_info: if i[1].count(‘.mobi‘) > 0: bookSum+=1 if bookSum == 0: print ‘!!!bookSum = 0!!!!‘, text[:100] if bookSum == 1: print ‘only one book in this thread‘ bookFileName = threadName + ‘.mobi‘ for i in href_info: if i[1].count(‘.mobi‘) > 0: link = i[0].replace(‘amp;‘,‘‘) break print link, bookFileName downloadMobi(bookFileName, link) else: print str(bookSum), ‘in this thread‘ for i in href_info: if i[1].count(‘.mobi‘) > 0: link = i[0].replace(‘amp;‘,‘‘) bookFileName = i[1] print link, bookFileName downloadMobi(bookFileName, link)for pageNum in range(1, 125): url = ‘http://www.kindle114.com/forum.php?mod=forumdisplay&fid=2&filter=sortid&sortid=1&searchsort=1&geshi=1&page=‘ + str(pageNum) print ‘=============url‘, url,‘===============‘ try: req = urllib2.urlopen(url, timeout = 10) except: print ‘page time out‘, url text = req.read() href = ‘<h4><a href="http://www.mamicode.com/(.*?)" target="_blank" class="xst">(.*?)<span class="xi1">‘ href_re = re.compile(href) href_info = href_re.findall(text) for i in href_info: print i[0], i[1] url = ‘http://www.kindle114.com/‘+i[0] threadName = i[1] try: spiderThread(url, threadName) except Exception , e: print ‘!!!!!!!!!!!!! Error with ‘,threadName, url,‘!!!!!!!!!!!!!!!!‘ print eraw_input(‘finish all!!!‘)
使用Python爬取mobi格式电纸书
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