最近在学习python，使用的版本为python3.4，开发环境为使用Pydev插件的eclipse。正好觉得http://www.dexiazai.com/?page_id=23上的音乐不错，决定使用python批量下载下来。

     1、音乐地址

     经过分析，页面嵌入的虾米播放器中的地址如下，后面以逗号分隔的字符为音乐的id，如音乐的地址为http://www.xiami.com/song/2088578

<span style="font-size:14px;"><span style="font-size:14px;">   <embed src="http://www.xiami.com/widget/0_2088578,163414,603408,1769697211,1519594,1944911,1769482546,1771498226,2050705,1769213208,2957497,
    1769779902,1769897948,1770077250,1771638197,109133,1769220090,3469026,2456779,3673869,385167,1769528393,1770130506,1014582,3418745,1769554460,
    1769692638,1279925,1769582513,136064,1769528375,1769455237,1769075782,2095209,1770618381,3427512,2108249,1771186364,2087541,1769384565,1770432131,
    2149137,2083819,1768911382,3429194,2089207,1770177060,1770427913,1769279049,2089339,2085205,3437055,3646041,2070983,2070741,3619123,1770068122,
    2082956,2071004,1768679,1769683697,3567557,109133,1769572701,2152946,3489617,1770292731_235_346_FF8719_494949_1/multiPlayer.swf" type="application/x-shockwave-flash"
    width="235" height="320" wmode="opaque"></embed></span></span>

     经过分析知，可在http://www.xiami.com/song/playlist/id/2088578/object_name/default/object_id/0中查询音乐的xml信息，其中location是经过加密的源地址，通过解密后可得到正确的地址。之中具体的操作可参考《python爬取虾米音乐》这篇博客。

      2、获取所有音乐的id，形成列表

<span style="font-size:14px;"><span style="font-size:14px;">    dexiazai_url="http://www.dexiazai.com/?page_id=23"
    req=urllib2.Request(dexiazai_url, headers={
    'Connection': 'Keep-Alive',
    'Accept': 'text/html, application/xhtml+xml, */*',
    'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3',
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
    })
    response=urllib2.urlopen(req)
    content=response.read().decode('utf-8')
    pattern=re.compile('<embed.*?src="http://www.xiami.com/widget/0_(.*?)/multiPlayer.swf"',re.S)
    ids=re.search(pattern,content).group(1)
    idarr=ids.split(",")
   
   
</span></span>

     3、获取音乐名称（加上序号）

<span style="font-size:14px;"><span style="font-size:14px;">        url="http://www.xiami.com/song/"+str(idarr[i])
        print("==================num: "+str(i)+"=======================")
        print(url)   
        #获取歌词名
        req=urllib2.Request(url, headers={
        'Connection': 'Keep-Alive',
        'Accept': 'text/html, application/xhtml+xml, */*',
        'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3',
        'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
        })
        rep=urllib2.urlopen(req)
        cont=rep.read().decode('utf-8')
        pat=re.compile('<div.*?id="title">(.*?)</h1>', re.S)
        fname=re.search(pat,cont).group(1)
        fname=fname.strip().lstrip().rstrip().replace('<h1>','')
        #J'Ai Deux Amours转码为J'Ai Deux Amours
        fname=html.parser.unescape(fname)
        fname=fname.split("<a target")[0]
        fname=str(i+1)+"_"+fname

     4、附上所有代码
    </span><pre name="code" class="html"><span style="font-size:14px;"># -*- coding: utf-8 -*-
                            
import re
import urllib.request as urllib2
import html.parser
                            
class XiamiDownload(object):
                            
    """虾米音乐下载"""
                            
    def __init__(self, url_song):
                            
        """ 初始化，得到请求xml和加密的下载地址 """
                            
        self.url_song = url_song       
        self.url_xml = self.__get_xml()
        self.info = self. __get_info()
        self.url_location = self.info[0]
        self.lyc = self.info[1]
        self.pic = self.info[2]
                                
    def __get_xml(self):
                            
        """ 得到请求的 xml 地址 """
                            
        return 'http://www.xiami.com/song/playlist/id/%s/object_name/default/object_id/0' % re.search('\d+', self.url_song).group()
                            
    def __get_info(self):
                            
        """ 伪装浏览器请求，处理xml，得到 加密的 location """
                            
        headers = {
            'User-Agent':'Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9.1.6) Gecko/20091201 Firefox/3.5.6'
        }
        req = urllib2.Request(
            url = self.url_xml,
            headers = headers
        )
        try:
            xml = urllib2.urlopen(req).read().decode('utf-8')
            #print("xml:"+xml)
            pattern_location=re.compile('<location>(.*?)</location>',re.S)
            location = re.search(pattern_location, xml).group(1)
            #print("location:"+location)
            lyc_location=re.compile('<lyric>(.*?)</lyric>',re.S)
            lyc = re.search(lyc_location, xml).group(1) 
            pic_location=re.compile('<pic>(.*?)</pic>',re.S)
            pic = re.search(pic_location, xml).group(1) 
            return (location, lyc, pic)
        except:
            return("exception","exception","exception")
                            
    def get_url(self):
                            
        """ 解密 location 获得真正的下载地址 """
                            
        strlen = len(self.url_location[1:])
        rows = int(self.url_location[0])
        cols = strlen // rows
        right_rows = strlen % rows
        new_str = self.url_location[1:] 
        url_true = ''
        #print(strlen)                    
        for i in range(strlen):
            x = i % rows
            y = i / rows
            p = 0
            if x <= right_rows:
                p = x * (cols + 1) + y
            else:
                p = right_rows * (cols + 1) + (x - right_rows) * cols + y
            #print(p)
            url_true += new_str[int(p)]
            #print(url_true)
        return urllib2.unquote(url_true).replace('^', '0')
    
        
                            
if __name__ == '__main__':
                           
    dexiazai_url="http://www.dexiazai.com/?page_id=23"
    req=urllib2.Request(dexiazai_url, headers={
    'Connection': 'Keep-Alive',
    'Accept': 'text/html, application/xhtml+xml, */*',
    'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3',
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
    })
    response=urllib2.urlopen(req)
    content=response.read().decode('utf-8')
    pattern=re.compile('<embed.*?src="http://www.xiami.com/widget/0_(.*?)/multiPlayer.swf"',re.S)
    ids=re.search(pattern,content).group(1)
    idarr=ids.split(",")
    for i in range(len(idarr)-1):
        url="http://www.xiami.com/song/"+str(idarr[i])
        print("==================num: "+str(i)+"=======================")
        print(url)   
        #获取歌词名
        req=urllib2.Request(url, headers={
        'Connection': 'Keep-Alive',
        'Accept': 'text/html, application/xhtml+xml, */*',
        'Accept-Language': 'en-US,en;q=0.8,zh-Hans-CN;q=0.5,zh-Hans;q=0.3',
        'User-Agent': 'Mozilla/5.0 (Windows NT 6.3; WOW64; Trident/7.0; rv:11.0) like Gecko'
        })
        rep=urllib2.urlopen(req)
        cont=rep.read().decode('utf-8')
        pat=re.compile('<div.*?id="title">(.*?)</h1>', re.S)
        fname=re.search(pat,cont).group(1)
        fname=fname.strip().lstrip().rstrip().replace('<h1>','')
        #J'Ai Deux Amours转码为J'Ai Deux Amours
        fname=html.parser.unescape(fname)
        fname=fname.split("<a target")[0]
        fname=str(i+1)+"_"+fname
        print("歌曲名为： "+fname+"  开始下载")
        xi = XiamiDownload(url)
        if xi.url_location=="exception":
            continue
        url_download = xi.get_url()
        url_pic = xi.pic
        url_lyc = xi.lyc
                                
        print ('下载地址是: ' +url_download)
                                
        try:
            urllib2.urlretrieve(url_download, fname+'.mp3')
            urllib2.urlretrieve(url_pic, fname+'.jpg')
            urllib2.urlretrieve(url_lyc, fname+'.lyc')
        except:
            continue
                                    
        print ("完成下载...")


</span></span>

   5、效果

          6、使用cx_Freeze打包发布exe

         因为python3.4在py2exe或者pyinstaller发布有点问题（不支持），所以用cx_Freeze发布，cx_Freeze的下载地址为http://www.lfd.uci.edu/~gohlke/pythonlibs/#cx_freeze 我下载的是Cython‑0.22‑cp34‑none‑win32.whl，是python3.4的安装目录下使用py3.4 install D:\****\Cython‑0.22‑cp34‑none‑win32.whl安装。

         然后在python3.4的安装目录下\Lib\site-packages\cx_Freeze\samples\PyQt4中将setup.py拷贝出来再编辑将里面的安装文件名称指定为要发布的文件，然后在命令行执行python setup.py build 命令，则生成build文件夹，里面有可执行文件xiami_download_dexiazai.exe