Added an idea of the script

everything.py

@@ -0,0 +1,97 @@
+#!/usr/bin/python3
+from requests import Session
+from lxml import html
+from re import compile, findall, match
+from os import makedirs
+from os.path import exists, getmtime
+from calendar import timegm
+from time import strptime
+
+AUTH_NONE = 0
+AUTH_MOODLE = 1
+
+_regex = compile('https\:\/\/www\.moodle\.tum\.de\/mod\/resource\/view\.php\?id\=\d{6}')
+_is_file = compile('\.(pdf|txt|py|c|jar)')
+
+def create_filepath(filepath):
+	if not exists(filepath):
+		makedirs(filepath)
+
+def download_file(session, url, filepath):
+	filename = filepath + url[url.rindex('/'):] #ugly as fuck
+
+	if not exists(filename):
+		print('[+] ' + filename)
+		req = session.get(url)
+		with open(filename, 'wb') as fh:
+			for chunk in req.iter_content():
+				fh.write(chunk)
+	else:
+		last_mod_file = getmtime(filename)
+		last_mod_www = timegm(strptime(session.head(url).headers['Last-Modified'], '%a, %d %b %Y %H:%M:%S %Z'))
+
+		if last_mod_www > last_mod_file:
+			print('[M] ' + filename)
+			req = session.get(url)
+			with open(filename, 'wb') as fh:
+				for chunk in req.iter_content():
+					fh.write(chunk)
+
+def resolve_direct_link(session, url):
+	return session.head(url).headers['Location']
+
+def get_file_links(session, url, base=''):
+	links = []
+	handle = session.get(url).text
+
+	if url.startswith('https://www.moodle.tum.de/course/'):
+		for match in findall(_regex, handle):
+			links.append(resolve_direct_link(session, match))
+	else:
+		hrefs = html.fromstring(handle).xpath('//a/@href')
+		for href in hrefs:
+			if _is_file.findall(href) != []: # is file link?
+				links.append(base + href)
+
+	return links
+
+def get_moodle_session(user, passwd):
+	session = Session()
+
+	session.get('https://www.moodle.tum.de/Shibboleth.sso/Login?providerId=https://tumidp.lrz.de/idp/shibboleth&target=https://www.moodle.tum.de/auth/shibboleth/index.php')
+	resp = session.post('https://tumidp.lrz.de/idp/Authn/UserPassword', data={'j_username':user, 'j_password':passwd})
+
+	parsed = html.fromstring(resp.text)
+
+	session.post('https://www.moodle.tum.de/Shibboleth.sso/SAML2/POST', data={'RelayState':parsed.forms[0].fields['RelayState'], 'SAMLResponse':parsed.forms[0].fields['SAMLResponse']})
+
+	return session
+
+def main(AUTH_MOODLE, user, passwd, url, files):
+	session = get_moodle_session(user, passwd)
+	links = get_file_links(session, url)
+
+	for link in links:
+		for ft in files:
+			reg = compile(ft[0])
+			match = reg.findall(link)
+			if match != []:
+				create_filepath(ft[1])
+				download_file(session, link, ft[1] + '/' + match[0])
+
+def main(mode, url, files, user='', passwd='', base=''):
+	session = None
+	if mode == AUTH_MOODLE:
+		session = get_moodle_session(user, passwd)
+	else:
+		session = Session()
+
+	links = get_file_links(session, url, base)
+
+	for link in links:
+		for ft in files:
+			reg = compile(ft[0])
+			match = reg.findall(link)
+			if match != []:
+				create_filepath(ft[1])
+				download_file(session, link, ft[1])