#!/usr/bin/python
# -*- coding: utf-8 -*-
 
import urllib,os,sys
import gevent,re
from gevent import monkey
from bs4 import BeautifulSoup
gevent.monkey.patch_socket()
 
'''
Description：Python 爬蟲抓取懶人圖庫的JS腳本模板
Author：admin
Create-Date：2015-05-25
Version：1.0
'''
 
HTTP_URL = 'http://www.lanrentuku.com%s'
DOWNLOAD_URL = HTTP_URL[:-2] + '/js/d%szip'
reg=r'\d{1,}\.+'
 
def encode(text):
  return text.encode("utf8")
 
def createDirectory(curPath):
  myPath = os.path.join(getSubDirectory(), u'JS代碼模板')
  if not os.path.exists(myPath):
    os.mkdir(myPath)
  return os.path.join(myPath, curPath)
 
def getSubDirectory():
  return os.getcwd()
 
def schedule(a, b, c): 
  per = 100.0 * a * b / c
  if per > 100 :
    per = 100
  sys.stdout.write('%.1f%%\r' % per)
  sys.stdout.flush()
 
def geturllist(url):
  url_list = {}
  html = urllib.urlopen(url)
  content = html.read()
  html.close()
  # 用BeautifulSoup解析
  decodeHtml = BeautifulSoup(content)
  try:
    aTags = decodeHtml.find_all('div', {'class':'list-pngjs'})[0].find_all('a')
  except IndexError, e:
    print e
    aTags = None
  # 獲取鏈接地址和標題
  if aTags is not None:
    for a_tag in aTags:
      url_list[HTTP_URL % a_tag.get('href')] = a_tag.get_text()
  return url_list
  
def download(down_url):
  try:
    m=re.search(reg,down_url[0])
    name = DOWNLOAD_URL % m.group(0)
    urllib.urlretrieve(name,createDirectory(down_url[1] + name[-4:]),schedule)
  except Exception, e:
    print e.message
  
def getpageurl(xUrl):
  # 進行列表頁循環
  return [xUrl % page for page in xrange(1,49)]
 
if __name__ == '__main__':
  jobs = []
  pageurl = getpageurl('http://www.lanrentuku.com/js/p%s.html')
  # 爬取所有鏈接
  for i in pageurl:
    for k in geturllist(i).items():
      jobs.append(gevent.spawn(download, k))
  gevent.joinall(jobs)