def get_syllabus_url(class_name, preview):
"""
Return the Coursera index/syllabus URL, depending on if we want to only
preview or if we are enrolled in the course.
"""
class_type = 'preview' if preview else 'index'
page = CLASS_URL.format(class_name=class_name) + '/lecture/' + class_type
logging.debug('Using %s mode with page: %s', class_type, page)
return page
def get_syllabus_url(class_name, preview):
"""
Return the Coursera index/syllabus URL, depending on if we want to only
preview or if we are enrolled in the course.
"""
class_type = 'preview' if preview else 'index'
page = CLASS_URL.format(class_name=class_name) + '/lecture/' + class_type
logging.debug('Using %s mode with page: %s', class_type, page)
return page
def get_syllabus_url(class_name, preview):
"""
Return the Coursera index/syllabus URL.
The returned result depends on if we want to only use a preview page or
if we are enrolled in the course.
"""
class_type = "preview" if preview else "index"
page = CLASS_URL.format(class_name=class_name) + "/lecture/" + class_type
logging.debug("Using %s mode with page: %s", class_type, page)
return page
def do_we_have_valid_cookies(session, class_name):
"""
Checks whether we have all the required cookies
to authenticate on class.coursera.org, and if they are not yet stale.
"""
if not do_we_have_enough_cookies(session.cookies, class_name):
return False
url = CLASS_URL.format(class_name=class_name) + "/class"
r = session.head(url, allow_redirects=False)
if r.status_code == 200:
return True
else:
logging.debug("Stale session.")
return False
def login(session, class_name, username, password):
"""
Login on www.coursera.org with the given credentials.
This adds the following cookies to the session:
sessionid, maestro_login, maestro_login_flag
"""
try:
session.cookies.clear('www.coursera.org')
except KeyError:
pass
# Hit class url to obtain csrf_token
class_url = CLASS_URL.format(class_name=class_name)
r = requests.get(class_url, allow_redirects=False)
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
logging.error(e)
raise ClassNotFound(class_name)
csrftoken = r.cookies.get('csrf_token')
if not csrftoken:
raise AuthenticationFailed('Did not recieve csrf_token cookie.')
# Now make a call to the authenticator url.
headers = {
'Cookie': 'csrftoken=' + csrftoken,
'Referer': 'https://www.coursera.org',
'X-CSRFToken': csrftoken,
}
data = {
'email_address': username,
'password': password
}
r = session.post(AUTH_URL, data=data,
headers=headers, allow_redirects=False)
try:
r.raise_for_status()
except requests.exceptions.HTTPError:
raise AuthenticationFailed('Cannot login on www.coursera.org.')
logging.info('Logged in on www.coursera.org.')
def validate_cookies(session, class_name):
"""
Checks whether we have all the required cookies
to authenticate on class.coursera.org. Also check for and remove
stale session.
"""
if not do_we_have_enough_cookies(session.cookies, class_name):
return False
url = CLASS_URL.format(class_name=class_name) + '/class'
r = session.head(url, allow_redirects=False)
if r.status_code == 200:
return True
else:
logging.debug('Stale session.')
try:
session.cookies.clear('.coursera.org')
except KeyError:
pass
return False
def validate_cookies(session, class_name):
"""
Checks whether we have all the required cookies
to authenticate on class.coursera.org. Also check for and remove
stale session.
"""
if not do_we_have_enough_cookies(session.cookies, class_name):
return False
url = CLASS_URL.format(class_name=class_name) + '/class'
r = session.head(url, allow_redirects=False)
if r.status_code == 200:
return True
else:
logging.debug('Stale session.')
try:
session.cookies.clear('.coursera.org')
except KeyError:
pass
return False
def login(session, class_name, username, password):
"""
Login on www.coursera.org with the given credentials.
This adds the following cookies to the session:
sessionid, maestro_login, maestro_login_flag
"""
try:
session.cookies.clear("www.coursera.org")
except KeyError:
pass
# Hit class url to obtain csrf_token
class_url = CLASS_URL.format(class_name=class_name)
r = requests.get(class_url, allow_redirects=False)
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
logging.error(e)
raise ClassNotFound(class_name)
csrftoken = r.cookies.get("csrf_token")
if not csrftoken:
raise AuthenticationFailed("Did not recieve csrf_token cookie.")
# Now make a call to the authenticator url.
headers = {"Cookie": "csrftoken=" + csrftoken, "Referer": "https://www.coursera.org", "X-CSRFToken": csrftoken}
data = {"email_address": username, "password": password}
r = session.post(AUTH_URL, data=data, headers=headers, allow_redirects=False)
try:
r.raise_for_status()
except requests.exceptions.HTTPError:
raise AuthenticationFailed("Cannot login on www.coursera.org.")
logging.info("Logged in on www.coursera.org.")
def login(session, username, password, class_name=None):
"""
Login on coursera.org with the given credentials.
This adds the following cookies to the session:
sessionid, maestro_login, maestro_login_flag
"""
logging.debug('Initiating login.')
try:
session.cookies.clear('.coursera.org')
logging.debug('Cleared .coursera.org cookies.')
except KeyError:
logging.debug('There were no .coursera.org cookies to be cleared.')
# Hit class url
if class_name is not None:
class_url = CLASS_URL.format(class_name=class_name)
r = requests.get(class_url, allow_redirects=False)
try:
r.raise_for_status()
except requests.exceptions.HTTPError as e:
logging.error(e)
raise ClassNotFound(class_name)
# csrftoken is simply a 20 char random string.
csrftoken = random_string(20)
# Now make a call to the authenticator url.
csrf2cookie = 'csrf2_token_%s' % random_string(8)
csrf2token = random_string(24)
cookie = "csrftoken=%s; %s=%s" % (csrftoken, csrf2cookie, csrf2token)
logging.debug('Forging cookie header: %s.', cookie)
headers = {
'Cookie': cookie,
'X-CSRFToken': csrftoken,
'X-CSRF2-Cookie': csrf2cookie,
'X-CSRF2-Token': csrf2token,
}
data = {
'email': username,
'password': password,
'webrequest': 'true'
}
# Auth API V3
r = session.post(AUTH_URL_V3, data=data,
headers=headers, allow_redirects=False)
try:
r.raise_for_status()
# Some how the order of cookies parameters are important
# for coursera!!!
v = session.cookies.pop('CAUTH')
session.cookies.set('CAUTH', v)
except requests.exceptions.HTTPError:
raise AuthenticationFailed('Cannot login on coursera.org.')
logging.info('Logged in on coursera.org.')
