免费下载CSDN资源的代码，需要requests（好吧，我承认主要是因为我太懒了，已经记不到怎么用urllib来访问网页了，Orz），输入类似于http://download.csdn.net/detail/lyx_520/5312049的网址后自动获取下载地址，并用默认浏览器自动代开下载地址。方法来源于：http://hi.baidu.com/zzhzhlzd/item/e17562db3409759a270ae7c5

DownCSDN.py

#coding:gbk
from ctypes import *
import requests

_down='http://download.csdn.net/index.php/rest/source/getsourceinfo/'
url=raw_input("输入资源地址：")
url=url.strip()
id=url[url.rfind('/')+1:]
print id
url=_down+id
#print url
payload={'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:20.0) Gecko/20100101 Firefox/20.0'}
r=requests.get(url,headers=payload)
#print r.text
js=r.json()
print js['title']
downurl=js['url']
print downurl
ShellExecute=windll.shell32.ShellExecuteA
ShellExecute.argtypes=[c_ulong, c_char_p, c_char_p, c_char_p, c_char_p, c_ulong]
ShellExecute(0, 'open', downurl, '', '', 0)