coursera课程视频

#!/usr/bin/env python
# coding=utf-8

import urllib
import urllib2
import cookielib

def setcookie(enable_proxy=False):
    proxy_handler = urllib2.ProxyHandler({"http":'10.13.61.118:6666', "https":'10.13.61.118:6666'}) # 学校代理
    cookiejar = cookielib.LWPCookieJar()
    cookie_support = urllib2.HTTPCookieProcessor(cookiejar)
    debug_hander = urllib2.HTTPHandler(debuglevel=1) # debuglevel=0
    if enable_proxy:
        opener = urllib2.build_opener(cookie_support, proxy_handler, debug_hander)
    else:
        opener = urllib2.build_opener(cookie_support, debug_hander)
    urllib2.install_opener(opener)

def download(fp,tofile):
    outf = open(tofile,'wb')
    c = 0
    print ('Downloading to %s'%(tofile))
    while True:
        s = fp.read(1024*128)
        if len(s) == 0:
            break
        outf.write(s)
        c += len(s)
        print ('Download %d'%(c))
    outf.close()

import os
def main(num=32,  urlhost='https://class.coursera.org/ml-006/lecture/download.mp4?lecture_id='):
    for i in xrange(1,num+1):
        if os.path.exists(str(i)+'.mp4'):continue
        print urlhost+str(i)

        header = {
        'User-Agent':'Mozilla/5.0 (Windows NT 6.1; WOW64; rv:28.0) Gecko/20100101 Firefox/28.0',
        'Accept':'text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8',
        'Accept-Language':'zh-cn,zh;q=0.8,en-us;q=0.5,en;q=0.3',
        'Accept-Encoding':'gzip, deflate, sdcn',
        }
        req = urllib2.Request(url=urlhost+str(i), headers=header)
        try:
            fp = urllib2.urlopen(req)
        except:
            continue
        download(fp, str(i)+'.mp4')
        fp.close()

if __name__ == '__main__':
    setcookie()
    main(106, 'https://class.coursera.org/pgm/lecture/download.mp4?lecture_id=')