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edx_dl.py
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edx_dl.py
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#!/usr/bin/python
# -*- coding: utf-8 -*-
import glob
import json
import mechanize
import re
import sys
import os.path
from bs4 import BeautifulSoup
from math import floor
from random import random
from urllib import urlencode
from youtube_dl.FileDownloader import FileDownloader
from youtube_dl.InfoExtractors import YoutubeIE
from youtube_dl.utils import sanitize_filename
import config
replace_space_with_underscore = True
base_url = 'https://'+config.DOMAIN
# Dirty hack for differences in 10gen and edX implementation
if 'edx' in config.DOMAIN.split('.'):
login_url = '/login_ajax'
else:
login_url = '/login'
dashboard_url = '/dashboard'
youtube_url = 'http://www.youtube.com/watch?v='
def makeCsrf():
t = '0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
e = 24
csrftoken = list()
for i in range(0,e):
csrftoken.append(t[int(floor(random()*len(t)))])
return ''.join(csrftoken)
def csrfCookie(csrftoken):
return mechanize.Cookie(version=0,
name='csrftoken',
value=csrftoken,
port=None, port_specified=False,
domain=config.DOMAIN,
domain_specified=False,
domain_initial_dot=False,
path='/', path_specified=True,
secure=False, expires=None,
discard=True,
comment=None, comment_url=None,
rest={'HttpOnly': None}, rfc2109=False)
class EdXBrowser(object):
def __init__(self, config):
self._br = mechanize.Browser()
self._cj = mechanize.LWPCookieJar()
csrftoken = makeCsrf()
self._cj.set_cookie(csrfCookie(csrftoken))
self._br.set_handle_robots(False)
self._br.set_cookiejar(self._cj)
self._br.addheaders.append(('X-CSRFToken',csrftoken))
self._br.addheaders.append(('Referer',base_url))
self._logged_in = False
self._fd = FileDownloader(config.YDL_PARAMS)
self._fd.add_info_extractor(YoutubeIE())
self._config = config
def login(self):
try:
login_resp = self._br.open(base_url + login_url, urlencode({'email':self._config.EMAIL, 'password':self._config.PASSWORD}))
login_state = json.loads(login_resp.read())
self._logged_in = login_state.get('success')
if not self._logged_in:
print login_state.get('value')
return self._logged_in
except mechanize.HTTPError, e:
sys.exit('Can\'t sign in')
def list_courses(self):
self.courses = []
if self._logged_in:
dashboard = self._br.open(base_url + dashboard_url)
dashboard_soup = BeautifulSoup(dashboard.read())
my_courses = dashboard_soup.findAll('article', 'my-course')
i = 0
for my_course in my_courses:
course_url = my_course.a['href']
course_name = my_course.h3.text
if self._config.interactive_mode:
launch_download_msg = 'Download the course [%s] from %s? (y/n) ' % (course_name, course_url)
launch_download = raw_input(launch_download_msg)
if (launch_download.lower() == "n"):
continue
i += 1
courseware_url = re.sub(r'\/info$','/courseware',course_url)
self.courses.append({'name':course_name, 'url':courseware_url})
print '[%02i] %s' % (i, course_name)
def list_chapters(self, course_i):
self.paragraphs = []
if course_i < len(self.courses) and course_i >= 0:
print "Getting chapters..."
course = self.courses[course_i]
course_name = course['name']
courseware = self._br.open(base_url+course['url'])
courseware_soup = BeautifulSoup(courseware.read())
chapters = courseware_soup.findAll('div','chapter')
i = 0
for chapter in chapters:
chapter_name = chapter.find('h3').find('a').text
if self._config.interactive_mode:
launch_download_msg = 'Download the chapter [%s - %s]? (y/n) ' % (course_name, chapter_name)
launch_download = raw_input(launch_download_msg)
if (launch_download.lower() == "n"):
continue
i += 1
print '\t[%02i] %s' % (i, chapter_name)
paragraphs = chapter.find('ul').findAll('li')
j = 0
for paragraph in paragraphs:
j += 1
par_name = paragraph.p.text
par_url = paragraph.a['href']
self.paragraphs.append((course_name, i, j, chapter_name, par_name, par_url))
print '\t\t[%02i.%02i] %s' % (i, j, par_name)
def download(self):
print "\n-----------------------\nStart downloading\n-----------------------\n"
for (course_name, i, j, chapter_name, par_name, url) in self.paragraphs:
#nametmpl = sanitize_filename(course_name) + '/' \
# + sanitize_filename(chapter_name) + '/' \
# + '%02i.%02i.*' % (i,j)
#fn = glob.glob(DIRECTORY + nametmpl)
nametmpl = os.path.join(DIRECTORY,
sanitize_filename(course_name, replace_space_with_underscore),
sanitize_filename(chapter_name, replace_space_with_underscore),
'%02i.%02i.*' % (i,j))
fn = glob.glob(nametmpl)
if fn:
print "Processing of %s skipped" % nametmpl
continue
print "Processing %s..." % nametmpl
par = self._br.open(base_url + url)
par_soup = BeautifulSoup(par.read())
contents = par_soup.findAll('div','seq_contents')
k = 0
for content in contents:
#print "Content: %s" % content
content_soup = BeautifulSoup(content.text)
try:
video_type = content_soup.h2.text.strip()
video_stream = content_soup.find('div','video')['data-streams']
video_id = video_stream.split(':')[1]
video_url = youtube_url + video_id
k += 1
print '[%02i.%02i.%02i] %s (%s)' % (i, j, k, par_name, video_type)
#f.writelines(video_url+'\n')
#outtmpl = DIRECTORY + sanitize_filename(course_name) + '/' \
# + sanitize_filename(chapter_name) + '/' \
# + '%02i.%02i.%02i ' % (i,j,k) \
# + sanitize_filename('%s (%s)' % (par_name, video_type)) + '.%(ext)s'
outtmpl = os.path.join(DIRECTORY,
sanitize_filename(course_name, replace_space_with_underscore),
sanitize_filename(chapter_name, replace_space_with_underscore),
'%02i.%02i.%02i ' % (i,j,k) + \
sanitize_filename('%s (%s)' % (par_name, video_type), replace_space_with_underscore) + '.%(ext)s')
self._fd.params['outtmpl'] = outtmpl
self._fd.download([video_url])
except Exception as e:
#print "Error: %s" % e
pass
if __name__ == '__main__':
config.interactive_mode = ('--interactive' in sys.argv)
if config.interactive_mode:
sys.argv.remove('--interactive')
if len(sys.argv) >= 2:
DIRECTORY = sys.argv[-1].strip('"')
else:
DIRECTORY = os.path.curdir
print 'Downloading to ''%s'' directory' % DIRECTORY
edxb = EdXBrowser(config)
edxb.login()
print 'Found the following courses:'
edxb.list_courses()
if edxb.courses:
print "Processing..."
else:
print "No courses selected, nothing to download"
for c in range(len(edxb.courses)):
print 'Course: ' + str(edxb.courses[c])
print 'Chapters:'
edxb.list_chapters(c)
edxb.download()