#!/usr/bin/python
# -*- coding: utf-8 -*-
'''
 百度中批量下载某歌手的歌(目前只下载第一页，可以自行拓展)
 @author:admin
 @qq: 1243385033
'''
import threading, urllib2, os,re,sys
from bs4 import BeautifulSoup
from Queue import Queue
'''目标歌手'''
SINGER = u'亚东'
'''保存路径'''
SAVE_FOLDER = 'F:/music/'
# 查询url
search_url = "http://music.baidu.com/search/song?key=%s&s=1"
# 百度音乐播放盒url
song_url = "http://box.zhangmen.baidu.com/x?op=12&count=1&mtype=1&title="
class Downloader(threading.Thread):
 def __init__(self, task):
  threading.Thread.__init__(self)
  self.task = task
 def run(self):
  '''覆盖父类的run方法'''
  while True:
   url = self.task.get()
   self.download(url)
   self.task.task_done()
 def build_path(self, filename):
  join = os.path.join
  parentPath=join(SAVE_FOLDER,SINGER)
  filename = filename + '.mp3'
  myPath = join(parentPath, filename)
  return myPath
 def download(self, url):
  '''下载文件'''
  sub_url = url.items()
  f_name = sub_url[0][0]
  req_url = sub_url[0][1]
  handle = urllib2.urlopen(req_url)
  # 保存路径
  save_path = self.build_path(f_name)
  with open(save_path, "wb") as handler:
   while True:
    chunk = handle.read(1024)
    if not chunk:
     break
    handler.write(chunk)
    msg = u"已经从 %s下载完成" % req_url
   sys.stdout.write(msg)
   sys.stdout.flush()
class HttpRequest:
 def __init__(self):
  self.task = []
  self.reg_decode = re.compile('<decode>.*?CDATA\[(.*?)\]].*?</decode>')
  self.reg_encode = re.compile('<encode>.*?CDATA\[(.*?)\]].*?</encode>')
  self.init()
  self.target_url = search_url % urllib2.quote(self.encode2utf8(SINGER))
 def encode2utf8(self,source):
  if source and isinstance(source,(str,unicode)):
   source=source.encode("utf8")
   return source
  return source
 def mkDir(self, dir_name):
  if not os.path.exists(dir_name):
   os.mkdir(dir_name)
 def init(self):
  self.mkDir(SAVE_FOLDER)
  subPath = os.path.join(SAVE_FOLDER, SINGER)
  self.mkDir(subPath)
 def http_request(self):
  global song_url
  '''发起请求'''
  response=urllib2.urlopen(self.target_url)
  # 获取头信息
  content = response.read()
  response.close()
  # 使用BeautifulSoup
  html = BeautifulSoup(content, from_encoding="utf8")
  # 提取HTML标签
  span_tag = html.find_all('div', {"monkey":"song-list"})[0].find_all('span', class_='song-title')
   # 遍历List
  for a_tag in span_tag:
   song_name = unicode(a_tag.find_all("a")[0].get_text())
   song_url = song_url + urllib2.quote(self.encode2utf8(song_name))
   song_url = song_url + '$$' + urllib2.quote(self.encode2utf8(SINGER)) + '$$$$&url=&listenreelect=0&.r=0.1696378872729838'
   xmlfile = urllib2.urlopen(song_url)
   xml_content = xmlfile.read()
   xmlfile.close()
   url1 = re.findall(self.reg_encode, xml_content)
   url2 = re.findall(self.reg_decode, xml_content)
   if not url1 or not url2:
    continue
   url = url1[0][:url1[0].rindex('/') + 1] + url2[0]
   self.task.append({song_name:url})
  return self.task
def start_download(urls):
 #创建一个队列
 quene=Queue()
 #获取list的大小
 size=len(urls)
 #开启线程
 for _ in xrange(size):
  t=Downloader(quene)
  t.setDaemon(True)
  t.start()
 #入队列
 for url in urls:
  quene.put(url)
 quene.join()
if __name__=='__main__':
 http=HttpRequest()
 urls=http.http_request()
 start_download(urls)