# -*- coding: utf-8 -*-
 
import urllib,time,os,Image,win32gui,win32con,win32api
 
class StealBing:
 
 def __init__(self):
  self.content = urllib.urlopen('http://cn.bing.com/').read()
  self.bgImageUrl = ''
  self.localFileName = ''
  self.localBMPFileName = ''
 
 def parserImageURL(self):
  tempStr = self.content[self.content.index('g_img={url:')+12:]
  self.bgImageUrl = tempStr[:tempStr.index('id:\'bgDiv\'')-2]
 
 def createLocalFileName(self):
  randomStr = time.strftime("%Y%m%d", time.localtime())
  self.localFileName = 'D:/Bing/' + randomStr + '.jpg'
  self.localBMPFileName = 'D:/Bing/' + randomStr + '.bmp'
 
 def downloadImage(self):
  if self.bgImageUrl == '':
   self.parserImageURL()
  if self.localFileName == '':
   self.createLocalFileName()
  urllib.urlretrieve(self.bgImageUrl, self.localFileName)
 
 def updateBGImage(self):
  img = Image.open(self.localFileName)
  img.save(self.localBMPFileName)
  os.remove(self.localFileName)
  k = win32api.RegOpenKeyEx(win32con.HKEY_CURRENT_USER,"Control Panel\\Desktop",0,win32con.KEY_SET_VALUE)
  win32api.RegSetValueEx(k, "WallpaperStyle", 0, win32con.REG_SZ, "2") #2拉伸适应桌面,0桌面居中
  win32api.RegSetValueEx(k, "TileWallpaper", 0, win32con.REG_SZ, "0") 
  win32gui.SystemParametersInfo(win32con.SPI_SETDESKWALLPAPER, self.localBMPFileName , 1+2)
 
if __name__ == '__main__':
 stealBing = StealBing()
 stealBing.downloadImage()
 stealBing.updateBGImage()