Timothy's Space » Python http://www.xiaozhou.net 君看一叶舟，出没风波里 Tue, 07 Feb 2012 04:28:04 +0000 en hourly 1 http://wordpress.org/?v=3.3.1 VOA Special English MP3 Downloader http://www.xiaozhou.net/python/voa_special_english_mp3_downloader-2010-03-10.htm http://www.xiaozhou.net/python/voa_special_english_mp3_downloader-2010-03-10.htm#comments Tue, 09 Mar 2010 17:01:00 +0000 Timothy http://www.xiaozhou.net/python/voa-special-english-mp3-downloader-2010-03-10.htm 最近上下班开车挺无聊，听腻了各式音乐，打算利用上下班的时间学学英语，锻炼下生锈的耳朵，听听English MP3。以前一直比较喜欢VOA Special English的慢速版，虽然还是有一定的难度，但听起来多少能找到点感觉。今天突然心血来潮，google了下VOA的老家，很不幸，网页无法打开，第一直觉就是VOA被伟大的wall给挡住了。搜索了一下，果然如此……不过咱有SSH，怕啥？通过SSH果然可以正常访问，这也印证了前面的猜想。不过VOA的mp3貌似每天都出，一个一个点链接下载，实在是个体力活，人本来就有惰性，俺也不例外！于是，有了下面的想法……

咱IT民工，比较拿手的就是让电脑帮俺们去完成一些重复劳动，减轻体力负担，如果能让电脑自动帮俺下载mp3该多好！加之最近又在看python的东东，python很强大，几行代码就能完成复杂的工作。于是开始手痒，何不用python搞个下载器试试呢？ 对了，有wall，怎么办？不怕！咱有VPS，哈哈哈！

开工！在VOA的页面，上找到RSS页面地址(RSS页面包含有最新发布的文章以及mp3下载链接)，然后对RSS进行分析，写python脚本，调试，运行，效果还不错！最近发布文章的mp3被啪啪啪的拖到了VPS上。脚本十分简单：

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#!/usr/bin/python
#VOA Special English MP3 Downloader.
#Written by Timothy 2010.3.10
import urllib,time;
from xml.dom import minidom
from os import system
url = "http://www1.voanews.com/templates/Articles.rss?sectionPath=/learningenglish/home"
link = urllib.urlopen(url)
#content=link.read()
rss = minidom.parse(link)
elements = rss.getElementsByTagName('media:content')
for element in elements:
	if element.hasAttribute('type'):
		print 'Now downloading:' + element.getAttribute('url')
		system('wget -nc  ' + element.getAttribute('url'))

运行效果：

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timothy@vps:~$ ls
VOAEnglish.py
timothy@vps:~$ chmod +x VOAEnglish.py
timothy@vps:~$ ./VOAEnglish.py 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-sin-2578-smoking-09mar10.Mp3
--2010-03-09 16:37:40--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-sin-2578-smoking-09mar10.Mp3
Resolving www.voanews.com... 72.247.217.25, 72.247.217.9
Connecting to www.voanews.com|72.247.217.25|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7765680 (7.4M) [audio/mpeg]
Saving to: `se-sin-2578-smoking-09mar10.Mp3'
 
100%[==========================>] 7,765,680   10.0M/s   in 0.7s    
 
2010-03-09 16:37:41 (10.0 MB/s) - `se-sin-2578-smoking-09mar10.Mp3' saved [7765680/7765680]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-ag-broccoli-9mar10.Mp3
--2010-03-09 16:37:41--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-ag-broccoli-9mar10.Mp3
Resolving www.voanews.com... 72.247.217.25, 72.247.217.9
Connecting to www.voanews.com|72.247.217.25|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1905683 (1.8M) [audio/mpeg]
Saving to: `se-ag-broccoli-9mar10.Mp3'
 
100%[==========================>] 1,905,683   9.44M/s   in 0.2s    
 
2010-03-09 16:37:41 (9.44 MB/s) - `se-ag-broccoli-9mar10.Mp3' saved [1905683/1905683]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-dev-int-womens-day-8mar10.Mp3
--2010-03-09 16:37:41--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-dev-int-womens-day-8mar10.Mp3
Resolving www.voanews.com... 72.247.217.25, 72.247.217.9
Connecting to www.voanews.com|72.247.217.25|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1907146 (1.8M) [audio/mpeg]
Saving to: `se-dev-int-womens-day-8mar10.Mp3'
 
100%[==========================>] 1,907,146   8.81M/s   in 0.2s    
 
2010-03-09 16:37:41 (8.81 MB/s) - `se-dev-int-womens-day-8mar10.Mp3' saved [1907146/1907146]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-tia-molly-brown-05mar10.Mp3
--2010-03-09 16:37:41--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-tia-molly-brown-05mar10.Mp3
Resolving www.voanews.com... 72.247.217.9, 72.247.217.25
Connecting to www.voanews.com|72.247.217.9|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7429432 (7.1M) [audio/mpeg]
Saving to: `se-tia-molly-brown-05mar10.Mp3'
 
100%[==========================>] 7,429,432   8.68M/s   in 0.8s    
 
2010-03-09 16:37:42 (8.68 MB/s) - `se-tia-molly-brown-05mar10.Mp3' saved [7429432/7429432]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-pia-todd-duncan-7mar10.Mp3
--2010-03-09 16:37:42--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-pia-todd-duncan-7mar10.Mp3
Resolving www.voanews.com... 72.247.217.9, 72.247.217.25
Connecting to www.voanews.com|72.247.217.9|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7470601 (7.1M) [audio/mpeg]
Saving to: `se-pia-todd-duncan-7mar10.Mp3'
 
100%[==========================>] 7,470,601   6.06M/s   in 1.2s    
 
2010-03-09 16:37:43 (6.06 MB/s) - `se-pia-todd-duncan-7mar10.Mp3' saved [7470601/7470601]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-itn-tea-party-6mar10.Mp3
--2010-03-09 16:37:43--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-itn-tea-party-6mar10.Mp3
Resolving www.voanews.com... 72.247.217.25, 72.247.217.9
Connecting to www.voanews.com|72.247.217.25|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 2405145 (2.3M) [audio/mpeg]
Saving to: `se-itn-tea-party-6mar10.Mp3'
 
100%[==========================>] 2,405,145   3.98M/s   in 0.6s    
 
2010-03-09 16:37:44 (3.98 MB/s) - `se-itn-tea-party-6mar10.Mp3' saved [2405145/2405145]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-econ-corp-history-5mar10.Mp3
--2010-03-09 16:37:44--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-econ-corp-history-5mar10.Mp3
Resolving www.voanews.com... 72.247.217.9, 72.247.217.25
Connecting to www.voanews.com|72.247.217.9|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 1940583 (1.9M) [audio/mpeg]
Saving to: `se-econ-corp-history-5mar10.Mp3'
 
100%[==========================>] 1,940,583   6.77M/s   in 0.3s    
 
2010-03-09 16:37:44 (6.77 MB/s) - `se-econ-corp-history-5mar10.Mp3' saved [1940583/1940583]
 
Now downloading:http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-mosaic-05mar10.Mp3
--2010-03-09 16:37:44--  http://www.voanews.com/MediaAssets2/learningenglish/dalet/se-mosaic-05mar10.Mp3
Resolving www.voanews.com... 72.247.217.9, 72.247.217.25
Connecting to www.voanews.com|72.247.217.9|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 7341034 (7.0M) [audio/mpeg]
Saving to: `se-mosaic-05mar10.Mp3'
 
100%[==========================>] 7,341,034   9.01M/s   in 0.8s    
 
2010-03-09 16:37:45 (9.01 MB/s) - `se-mosaic-05mar10.Mp3' saved [7341034/7341034]
 
timothy@vps:~$ ls
se-ag-broccoli-9mar10.Mp3         se-pia-todd-duncan-7mar10.Mp3
se-dev-int-womens-day-8mar10.Mp3  se-sin-2578-smoking-09mar10.Mp3
se-econ-corp-history-5mar10.Mp3   se-tia-molly-brown-05mar10.Mp3
se-itn-tea-party-6mar10.Mp3       VOAEnglish.py
se-mosaic-05mar10.Mp3
timothy@vps:~$

VPS和VOA都在米国，下载速度很快啊……几秒钟的功夫……

最后，再想办法把mp3统统拖回来本地即可。此脚本适合拥有VPS的、有兴趣的同学使用，后续会慢慢改进脚本。

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