server.py 26.2 KB
Newer Older
1
from flask import Flask, g, request, url_for, redirect, session, render_template, flash, Response, make_response
2
from werkzeug.routing import Rule
3
from functools import wraps
Julian Rother's avatar
Julian Rother committed
4
from datetime import date, timedelta, datetime, time, MINYEAR
5
import threading
6
import os
7
import sys
Julian Rother's avatar
Julian Rother committed
8
import hashlib
9
import random
10
import sched
11
import traceback
12
import string
13
from socket import gethostname
Julian Rother's avatar
Julian Rother committed
14
from ipaddress import ip_address, ip_network
15
import math
Julian Rother's avatar
Julian Rother committed
16
import locale
17
import base64
Julian Rother's avatar
Julian Rother committed
18
19

locale.setlocale(locale.LC_ALL, 'de_DE.utf8')
20

21
app = Flask(__name__)
22

Andreas Valder's avatar
Andreas Valder committed
23
24
app.jinja_env.trim_blocks = True
app.jinja_env.lstrip_blocks = True
Julian Rother's avatar
Julian Rother committed
25
app.add_template_global(random.randint, name='randint')
26
27
app.add_template_global(datetime, name='datetime')
app.add_template_global(timedelta, name='timedelta')
28
app.add_template_global(gethostname, name='gethostname')
29
30
app.add_template_global(min, name='min')
app.add_template_global(max, name='max')
Andreas Valder's avatar
Andreas Valder committed
31

32

33
34
scheduler = sched.scheduler()
def run_scheduler():
Andreas Valder's avatar
Andreas Valder committed
35
	import time
36
	time.sleep(1) # UWSGI does weird things on startup
37
38
	while True:
		scheduler.run()
39
		time.sleep(10)
40

41
42
43
def sched_func(delay, priority=0, firstdelay=None, args=[], kargs={}):
	if firstdelay == None:
		firstdelay = random.randint(1, 120)
44
45
46
	def wrapper(func):
		def sched_wrapper():
			with app.test_request_context():
47
48
49
50
				try:
					func(*args, **kargs)
				except Exception:
					traceback.print_exc()
51
			scheduler.enter(delay, priority, sched_wrapper)
52
		scheduler.enter(firstdelay, priority, sched_wrapper)
53
54
55
56
		return func
	return wrapper

threading.Thread(target=run_scheduler, daemon=True).start()
57

58
config = app.config
59
config.from_pyfile('config.py.example', silent=True)
60
61
62
if sys.argv[0].endswith('run.py'): 
	config['SQLITE_INIT_DATA'] = True
	config['DEBUG'] = True
63
config.from_pyfile('config.py', silent=True)
Andreas Valder's avatar
Andreas Valder committed
64
65
if config['DEBUG']:
	app.jinja_env.auto_reload = True
Andreas Valder's avatar
Andreas Valder committed
66
67
68

# get git commit
import subprocess
Andreas Valder's avatar
Andreas Valder committed
69
output = subprocess.check_output(['git', "log", "-g", "-1", "--pretty=%H # %h # %d # %s"]).decode('UTF-8').split('#', 3)
Andreas Valder's avatar
Andreas Valder committed
70
app.jinja_env.globals['gitversion'] = { 'hash': output[1], 'longhash': output[0], 'branch': output[2], 'msg': output[3]  }
71

72
73
if not config.get('SECRET_KEY', None):
	config['SECRET_KEY'] = os.urandom(24)
Julian Rother's avatar
Julian Rother committed
74

75
from db import query, modify, show, searchquery, ldapauth
Julian Rother's avatar
Julian Rother committed
76

77
mod_endpoints = []
Julian Rother's avatar
Julian Rother committed
78

Julian Rother's avatar
Cleanup    
Julian Rother committed
79
@app.template_global()
80
81
82
83
def ismod(*args):
	return ('user' in session)

def mod_required(func):
84
	mod_endpoints.append(func.__name__)
85
86
	@wraps(func)
	def decorator(*args, **kwargs):
87
		if not ismod():
88
89
90
91
92
93
			flash('Diese Funktion ist nur für Moderatoren verfügbar!')
			return redirect(url_for('login', ref=request.url))
		else:
			return func(*args, **kwargs)
	return decorator

94
95
csrf_endpoints = []

96
def csrf_protect(func):
97
	csrf_endpoints.append(func.__name__)
98
99
100
101
	@wraps(func)
	def decorator(*args, **kwargs):
		if '_csrf_token' in request.values:
			token = request.values['_csrf_token']
Andreas Valder's avatar
Andreas Valder committed
102
		elif request.get_json() and ('_csrf_token' in request.get_json()):
103
104
			token = request.get_json()['_csrf_token']
		else:
105
			token = None
106
107
108
109
110
111
		if not ('_csrf_token' in session) or (session['_csrf_token'] != token ) or not token: 
			return 'csrf test failed', 403
		else:
			return func(*args, **kwargs)
	return decorator

112
113
@app.url_defaults
def csrf_inject(endpoint, values):
114
	if endpoint not in csrf_endpoints or not session.get('_csrf_token'):
115
116
117
		return
	values['_csrf_token'] = session['_csrf_token']

118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
def evalperm(perms):
	cperms = []
	lperms = []
	vperms = []
	for perm in perms:
		if perm['course_id']:
			cperms.append(perm)
		elif perm['lecture_id']:
			lperms.append(perm)
		elif perm['video_id']:
			vperms.append(perm)
	if vperms:
		return vperms
	elif lperms:
	 	return lperms
	elif cperms:
		return cperms
	return [{'type': 'public'}]
136

137
138
@app.template_filter()
def base64encode(str):
Andreas Valder's avatar
Andreas Valder committed
139
140
141
142
	try:
		return base64.b64encode(str.encode('UTF-8')).decode('UTF-8')
	except:
		return ''
143

144
@app.template_filter()
145
def checkperm(perms, username=None, password=None):
146
147
	if ismod():
		return True
148
149
150
	perms = evalperm(perms)
	for perm in perms:
		if perm['type'] == 'public':
151
			return True
152
153
		elif perm['type'] == 'password':
			if perm['param1'] == username and perm['param2'] == password:
154
				return True
155
156
		elif perm['type'] == 'l2p':
			if perm['param1'] in session.get('l2p_courses', []):
157
				return True
158
		elif perm['type'] == 'rwth':
159
160
			if session.get('rwthintern', False):
				return True
161
162
163
			if 'X-Real-IP' not in request.headers:
				continue
			ip = ip_address(request.headers['X-Real-IP'])
Julian Rother's avatar
Julian Rother committed
164
			for net in config['RWTH_IP_RANGES']:
165
166
				if ip in ip_network(net):
					return True
167
168
169
	return False

@app.template_filter()
170
171
def permdescr(perms):
	perms = evalperm(perms)
172
173
174
175
	public = False
	password = False
	l2p_courses = []
	rwth_intern = False
176
	fsmpi_intern = False
177
178
	for perm in perms:
		if perm['type'] == 'public':
179
			public = True
180
		elif perm['type'] == 'password':
181
			password = True
182
		elif perm['type'] == 'l2p':
183
			l2p_courses.append(perm['param1'])
184
		elif perm['type'] == 'rwth':
185
			rwth_intern = True
186
187
		elif perm['type'] == 'fsmpi':
			fsmpi_intern = True
188
	if public or not perms:
189
190
191
192
193
		return 'public', 'Öffentlich verfügbar'
	if rwth_intern:
		if password:
			return 'rwth', 'Nur für RWTH-Angehörige und Nutzer mit Passwort verfügbar'
		return 'rwth', 'Nur für RWTH-Angehörige verfügbar'
194
195
	if fsmpi_intern:
		return 'fsmpi', 'Nur für Fachschaftler verfügbar'
196
197
	if l2p_courses:
		if password:
198
199
			return 'l2p', 'Nur für Teilnehmer der Veranstaltung und Nutzer mit Passwort verfügbar'
		return 'l2p', 'Nur für Teilnehmer der Veranstaltung verfügbar'
200
201
	if password:
		return 'password', 'Nur für Nutzer mit Passwort verfügbar'
Julian Rother's avatar
Julian Rother committed
202
	return 'none', 'Nicht verfügbar'
203

204
app.jinja_env.globals['navbar'] = []
205
206
207
208
209
# iconlib can be 'bootstrap'
# ( see: http://getbootstrap.com/components/#glyphicons )
# or 'fa'
# ( see: http://fontawesome.io/icons/ )
def register_navbar(name, iconlib='bootstrap', icon=None):
210
	def wrapper(func):
211
		endpoint = func.__name__
212
		app.jinja_env.globals['navbar'].append((endpoint, name, iconlib, icon, not endpoint in mod_endpoints))
213
214
215
		return func
	return wrapper

Julian Rother's avatar
Cleanup    
Julian Rother committed
216
217
218
219
def render_endpoint(endpoint, flashtext=None, **kargs):
	if flashtext:
		flash(flashtext)
	# request.endpoint is used for navbar highlighting
220
	request.url_rule = Rule(request.path, endpoint=endpoint)
Julian Rother's avatar
Cleanup    
Julian Rother committed
221
222
	return app.view_functions[endpoint](**kargs)

223
224
225
226
227
228
229
def handle_errors(endpoint, text, code, *errors, **epargs):
	def wrapper(func):
		@wraps(func)
		def decorator(*args, **kwargs):
			try:
				return func(*args, **kwargs)
			except errors:
Julian Rother's avatar
Julian Rother committed
230
				if endpoint:
231
					return make_response(render_endpoint(endpoint, text, **epargs), code)
Julian Rother's avatar
Julian Rother committed
232
233
				else:
					return text, code
234
235
236
		return decorator
	return wrapper

Julian Rother's avatar
Cleanup    
Julian Rother committed
237
238
@app.errorhandler(404)
def handle_not_found(e):
239
	return render_endpoint('index', 'Diese Seite existiert nicht!'), 404
Julian Rother's avatar
Cleanup    
Julian Rother committed
240

241
242
243
244
@app.errorhandler(500)
@app.errorhandler(Exception)
def handle_internal_error(e):
	traceback.print_exc()
245
	return render_template('500.html'), 500
246

247
248
249
250
251
252
253
254
255
256
@sched_func(5*60, firstdelay=0)
def dump_error_page():
	if 'ERROR_PAGE' not in config:
		return
	request.url_rule = Rule(request.path, endpoint='handle_internal_error')
	text = render_template('500.html')
	f = open(config['ERROR_PAGE'], 'w')
	f.write(text)
	f.close()

Andreas Valder's avatar
Andreas Valder committed
257
258
# debian ships jinja2 without this test...
@app.template_test(name='equalto')
259
260
261
def equalto(a,b):
	return a == b

262
263
264
265
266
267
268
269
@app.template_filter(name='filterdict')
def jinja2_filterdict(value, attrdel):
	v = dict(value)
	for a in attrdel:
		if a in v:
			del v[a]
	return dict(v)

Julian Rother's avatar
Julian Rother committed
270
@app.template_filter(name='semester')
271
272
273
274
275
276
277
278
279
280
281
282
283
284
def human_semester(s, long=False):
	if not s or s == 'zeitlos' or len(s) != 6:
		return 'Zeitlos'
	year = s[0:4]
	semester = s[4:6].upper()
	if not year.isdigit() or semester not in ['SS', 'WS']:
		print('Invalid semester string "%s"'%s)
		return '??'
	if not long:
		return semester+year[2:]
	elif semester == 'SS':
		return 'Sommersemester %s'%year
	else:
		return 'Wintersemester %s/%s'%(year, str(int(year)+1)[2:])
Julian Rother's avatar
Julian Rother committed
285
286
287

@app.template_filter(name='date')
def human_date(d):
Andreas Valder's avatar
Andreas Valder committed
288
	return d.strftime('%d.%m.%Y')
Julian Rother's avatar
Julian Rother committed
289

Andreas Valder's avatar
Andreas Valder committed
290
@app.template_filter(name='time')
291
def human_time(d):
Andreas Valder's avatar
Andreas Valder committed
292
293
	return d.strftime('%H:%M')

Julian Rother's avatar
Julian Rother committed
294
295
296
297
@app.template_filter()
def rfc3339(d):
	return d.strftime('%Y-%m-%dT%H:%M:%S+02:00')

298
299
@app.template_global()
def get_announcements(minlevel=0):
300
301
	offset = timedelta()
	if ismod():
302
		offset = timedelta(hours=24)
303
304
305
306
	try:
		return query('SELECT * FROM announcements WHERE NOT deleted AND ((time_expire = NULL) OR time_expire > ?) AND (? OR (visible AND time_publish < ?)) AND level >= ? ORDER BY level DESC', datetime.now()-offset, ismod(), datetime.now(), minlevel)
	except:
		return []
307

308
309
310
311
312
@app.template_filter()
def fixnl(s):
	# To be remove, as soon as db schema is cleaned-up
	return str(s).replace('\n', '<br>')

313
314
315
316
317
318
319
320
321
322
323
@app.template_filter()
def tagid(s):
	if not s:
		return 'EMPTY'
	s = s.replace(' ', '_').lower()
	r = ''
	for c in s:
		if c in string.ascii_lowercase+string.digits+'_':
			r = r + c
	return r

324
325
326
327
328
329
330
331
332
def genlive(streams):
        for stream in streams:
                stream['visible'] = True
                stream['downloadable'] = False
                stream['path'] = 'pub/hls/%s.m3u8'%stream['livehandle']
                stream['file_size'] = 0
        return streams


333
@app.route('/')
334
@register_navbar('Home', icon='home')
335
def index():
336
337
338
	# handle legacy urls...
	if 'course' in request.args:
		return redirect(url_for('course', handle=request.args['course']),code=302)
339
340
	if 'view' in request.args:
		if (request.args['view'] == 'player') and ('lectureid' in request.args) :
341
342
343
344
			courses = query('SELECT courses.handle FROM courses JOIN lectures ON courses.id = lectures.course_id WHERE lectures.id = ?', request.args['lectureid'])
			if not courses:
				return "Not found", 404
			return redirect(url_for('lecture', course=courses[0]['handle'], id=request.args['lectureid']),code=302)
345

346
	start = date.today()
347
	end = start + timedelta(days=7)
348
	upcomming = query('''
349
		SELECT lectures.*, streams.active AS nowlive, "course" AS sep, courses.*
Andreas Valder's avatar
Andreas Valder committed
350
351
		FROM lectures
		JOIN courses ON (lectures.course_id = courses.id)
352
		LEFT JOIN streams ON lectures.id = streams.lecture_id
353
354
		WHERE (time > ?) AND (time < ?) AND (? OR (lectures.visible AND courses.visible AND courses.listed)) AND NOT lectures.norecording
		ORDER BY time ASC LIMIT 30''', start, end, ismod())
Andreas Valder's avatar
Andreas Valder committed
355
356
357
	for i in upcomming:
		i['date'] = i['time'].date()
	latestvideos=query('''
358
		SELECT lectures.*, "course" AS sep, courses.*
Andreas Valder's avatar
Andreas Valder committed
359
360
361
362
363
		FROM lectures
		LEFT JOIN videos ON (videos.lecture_id = lectures.id)
		LEFT JOIN courses on (courses.id = lectures.course_id)
		WHERE (? OR (courses.visible AND courses.listed AND lectures.visible AND videos.visible))
		GROUP BY videos.lecture_id
364
		ORDER BY MAX(videos.time_created) DESC
Andreas Valder's avatar
Andreas Valder committed
365
		LIMIT 6	''',ismod())
366
	livestreams = query('''SELECT streams.handle AS livehandle, lectures.*, "course" AS sep, courses.*
367
368
369
370
371
		FROM streams
		JOIN lectures ON lectures.id = streams.lecture_id
		JOIN courses ON courses.id = lectures.course_id
		WHERE streams.active AND (? OR (streams.visible AND courses.visible AND courses.listed AND lectures.visible))
		''', ismod())
Julian Rother's avatar
Julian Rother committed
372
	featured = query('SELECT * FROM featured WHERE (? OR visible) ORDER BY `order`', ismod())
373
	featured = list(filter(lambda x: not x['deleted'], featured))
Julian Rother's avatar
Julian Rother committed
374
375
376
377
	for item in featured:
		if item['type'] == 'courses':
			if item['param'] not in ['title', 'semester', 'organizer', 'subject']:
				continue
378
			item['courses'] = query('SELECT * FROM courses WHERE (visible AND listed) AND `%s` = ? ORDER BY `%s`'%(item['param'], item['param']), item['param2'])
379
	return render_template('index.html', latestvideos=livestreams+latestvideos, upcomming=upcomming, featured=featured)
380

381
@app.route('/courses')
382
@register_navbar('Videos', icon='film')
383
def courses():
384
	courses = query('SELECT * FROM courses WHERE (? OR (visible AND listed)) ORDER BY lower(semester), lower(title)', ismod())
385
386
387
	for course in courses:
		if course['semester'] == '':
			course['semester'] = 'zeitlos'
Andreas Valder's avatar
Andreas Valder committed
388
	groupedby = request.args.get('groupedby')
Julian Rother's avatar
Julian Rother committed
389
	if groupedby not in ['title', 'semester', 'organizer', 'subject']:
Andreas Valder's avatar
Andreas Valder committed
390
		groupedby = 'semester'
391
	return render_template('courses.html', courses=courses, groupedby=groupedby)
Andreas Valder's avatar
Andreas Valder committed
392

393
394
@app.route('/<handle>')
@app.route('/<int:id>')
395
@handle_errors('courses', 'Diese Veranstaltung existiert nicht!', 404, IndexError)
396
397
def course(id=None, handle=None):
	if id:
398
		course = query('SELECT * FROM courses WHERE id = ? AND (? OR visible)', id, ismod())[0]
399
	else:
400
		course = query('SELECT * FROM courses WHERE handle = ? AND (? OR visible)', handle, ismod())[0]
401
402
	course['perm'] = query('SELECT * FROM perm WHERE (NOT perm.deleted) AND course_id = ? ORDER BY type', course['id'])
	perms = query('SELECT perm.* FROM perm JOIN lectures ON (perm.lecture_id = lectures.id) WHERE (NOT perm.deleted) AND lectures.course_id = ? ORDER BY perm.type', course['id'])
403
	lectures = query('SELECT * FROM lectures WHERE course_id = ? AND (? OR visible) ORDER BY time, duration DESC', course['id'], ismod())
404
	for lecture in lectures:
405
		lecture['perm'] = []
406
		lecture['perm'] += course['perm']
407
		lecture['course'] = course
408
409
410
		for perm in perms:
			if perm['lecture_id'] == lecture['id']:
				lecture['perm'].append(perm)
Andreas Valder's avatar
Andreas Valder committed
411
	videos = query('''
412
			SELECT videos.*, (videos.downloadable AND courses.downloadable) as downloadable, "formats" AS sep, formats.*
Andreas Valder's avatar
Andreas Valder committed
413
414
415
416
417
418
			FROM videos
			JOIN lectures ON (videos.lecture_id = lectures.id)
			JOIN formats ON (videos.video_format = formats.id)
			JOIN courses ON (lectures.course_id = courses.id)
			WHERE lectures.course_id= ? AND (? OR videos.visible)
			ORDER BY lectures.time, formats.prio DESC
419
			''', course['id'], ismod())
420
	livestreams = query('''SELECT streams.handle AS livehandle, streams.lecture_id, "formats" AS sep, formats.*
421
422
423
424
425
426
			FROM streams
			JOIN lectures ON lectures.id = streams.lecture_id
			JOIN formats ON formats.keywords = "hls"
			WHERE streams.active AND (? OR streams.visible) AND lectures.course_id = ?
			''', ismod(), course['id'])
	videos += genlive(livestreams)
427
	return render_template('course.html', course=course, lectures=lectures, videos=videos)
Andreas Valder's avatar
Andreas Valder committed
428

Andreas Valder's avatar
Andreas Valder committed
429
@app.route('/faq')
430
@register_navbar('FAQ', icon='question-sign')
Andreas Valder's avatar
Andreas Valder committed
431
def faq():
432
	return render_template('faq.html')
Andreas Valder's avatar
Andreas Valder committed
433

434
435
436
437
@app.route('/<course>/<int:id>')
@app.route('/<int:courseid>/<int:id>')
@app.route('/<course>/<int:id>/embed', endpoint='embed')
@app.route('/<int:courseid>/<int:id>/embed', endpoint='embed')
438
@handle_errors('course', 'Diese Vorlesung existiert nicht!', 404, IndexError)
439
def lecture(id, course=None, courseid=None):
Andreas Valder's avatar
Andreas Valder committed
440
441
	lecture = query('SELECT * FROM lectures WHERE id = ? AND (? OR visible)', id, ismod())[0]
	videos = query('''
442
			SELECT videos.*, (videos.downloadable AND courses.downloadable) as downloadable, "formats" AS sep, formats.*
Andreas Valder's avatar
Andreas Valder committed
443
444
			FROM videos
			JOIN formats ON (videos.video_format = formats.id)
445
446
447
448
			JOIN courses ON (courses.id = ?)
			WHERE videos.lecture_id = ? AND (? OR videos.visible)
			ORDER BY formats.prio DESC
			''', lecture['course_id'], lecture['id'], ismod())
449
	livestreams = query('''SELECT streams.handle AS livehandle, streams.lecture_id, "formats" AS sep, formats.*
450
451
452
453
454
455
			FROM streams
			JOIN lectures ON lectures.id = streams.lecture_id
			JOIN formats ON formats.keywords = "hls"
			WHERE streams.active AND (? OR streams.visible) AND lectures.id = ?
			''', ismod(), id)
	videos += genlive(livestreams)
456
	perms = query('SELECT perm.* FROM perm WHERE ((NOT perm.deleted) AND (perm.lecture_id = ? OR perm.course_id = ?))',
457
			lecture['id'], lecture['course_id'])
458
	if not videos:
459
460
461
462
463
464
		if lecture['live'] and lecture['time'] > datetime.now()-timedelta(minutes=30) and lecture['time']-timedelta(hours=20) < datetime.now():
			flash('Der Livestream beginnt um '+human_time(lecture['time'])+' Uhr.')
		elif lecture['time'] > datetime.now():
			flash('Diese Vorlesung hat noch nicht stattgefunden!')
		else:
			flash('Zu dieser Vorlesung wurden noch keine Videos veröffentlicht!')
465
	courses = query('SELECT * FROM courses WHERE id = ? AND (? OR visible)', lecture['course_id'], ismod())
466
467
	if not courses:
		return render_endpoint('courses', 'Diese Veranstaltung existiert nicht!'), 404
468
	chapters = query('SELECT * FROM chapters WHERE lecture_id = ? AND NOT deleted AND (? OR visible) ORDER BY time ASC', id, ismod())
469
470
471
472
473
	username = password = None
	if request.authorization:
		username = request.authorization.username
		password = request.authorization.password
	if not checkperm(perms, username=username, password=password):
474
		mode, text = permdescr(perms)
475
		if mode == 'rwth':
476
			flash(text+'. <a target="_blank" class="reloadonclose" href="'+url_for('start_rwthauth')+'">Hier authorisieren</a>.', category='player')
477
		elif mode == 'l2p':
478
			if 'l2p_courses' in session:
479
				flash(text+'. Du bist kein Teilnehmer des L2P-Kurses! <a target="_blank" class="reloadonclose" href="'+url_for('start_l2pauth')+'">Kurse aktualisieren</a>.', category='player')
480
			else:
481
				flash(text+'. <a target="_blank" class="reloadonclose" href="'+url_for('start_l2pauth')+'">Hier authorisieren</a>.', category='player')
482
		else:
483
			flash(text+'.', category='player')
484
	return render_template('embed.html' if request.endpoint == 'embed' else 'lecture.html', course=courses[0], lecture=lecture, videos=videos, chapters=chapters)
Andreas Valder's avatar
Andreas Valder committed
485

486
487
488
489
490
491
492

@app.route('/search')
def search():
	if 'q' not in request.args:
		return redirect(url_for('index'))
	q = request.args['q']
	courses = searchquery(q, '*', ['title', 'short', 'organizer', 'subject', 'description'],
493
			'courses', 'WHERE (? OR (visible AND listed)) GROUP BY id ORDER BY _score DESC, semester DESC LIMIT 20', ismod())
Julian Rother's avatar
Julian Rother committed
494
495
496
497
498
	#lectures = searchquery(q, 'lectures.*, courses.visible AS coursevisible, courses.listed, "course" AS sep, courses.*',
	#			['lectures.title', 'lectures.comment', 'lectures.speaker', 'courses.short'],
	#			'lectures LEFT JOIN courses on (courses.id = lectures.course_id)',
	#			'WHERE (? OR (coursevisible AND listed AND visible)) GROUP BY id ORDER BY _score DESC, time DESC LIMIT 30', ismod())
	lectures = searchquery(q, 'lectures.*, courses.visible AS coursevisible, courses.listed, courses.id AS courses_id, courses.visible AS courses_visible, courses.listed AS courses_listed, courses.title AS courses_title, courses.short AS courses_short, courses.handle AS courses_handle, courses.organizer AS courses_organizer, courses.subject AS courses_subject, courses.credits AS courses_credits, courses.created_by AS courses_created_by, courses.time_created AS courses_time_created, courses.time_updated AS courses_time_updated, courses.semester AS courses_semester, courses.downloadable AS courses_downloadable, courses.embedinvisible AS courses_embedinvisible, courses.description AS courses_description, courses.internal AS courses_internal, courses.responsible AS courses_responsible',
499
500
			['lectures.title', 'lectures.comment', 'lectures.speaker', 'courses.short'],
			'lectures LEFT JOIN courses on (courses.id = lectures.course_id)',
501
			'WHERE (? OR (coursevisible AND listed AND visible)) GROUP BY id ORDER BY _score DESC, time DESC LIMIT 30', ismod())
Julian Rother's avatar
Julian Rother committed
502
503
504
505
506
	for lecture in lectures:
		lecture['course'] = {}
		for key in lecture:
			if key.startswith('courses_'):
				lecture['course'][key[8:]] = lecture[key]
507
	return render_template('search.html', searchtext=request.args['q'], courses=courses, lectures=lectures)
Andreas Valder's avatar
Andreas Valder committed
508

509
def check_mod(user, groups):
510
511
512
513
514
515
	if not user:
		return False
	for group in config['LDAP_GROUPS']:
		if group in groups:
			return True
	return False
516

517
@app.route('/internal/login', methods=['GET', 'POST'])
Julian Rother's avatar
Julian Rother committed
518
def login():
519
520
	if request.method == 'GET':
		return render_template('login.html')
521
522
	userinfo, groups = ldapauth(request.form.get('user'), request.form.get('password'))
	user = userinfo.get('uid')
523
	if not check_mod(user, groups):
524
		flash('Login fehlgeschlagen!')
525
		return render_template('login.html')
526
	session['user'] = userinfo
527
528
	dbuser = query('SELECT * FROM users WHERE name = ?', user)
	if not dbuser:
Julian Rother's avatar
Julian Rother committed
529
		modify('INSERT INTO users (name, realname, fsacc, level, calendar_key, rfc6238) VALUES (?, ?, ?, 1, "", "")', user, session['user']['givenName'], user)
530
531
		dbuser = query('SELECT * FROM users WHERE name = ?', user)
	session['user']['dbid'] = dbuser[0]['id']
532
	session['_csrf_token'] = ''.join(random.SystemRandom().choice(string.ascii_letters + string.digits) for _ in range(64))
Andreas Valder's avatar
Andreas Valder committed
533
	session.permanent = True
Julian Rother's avatar
Julian Rother committed
534
	return redirect(request.values.get('ref', url_for('index')))
Julian Rother's avatar
Julian Rother committed
535

536
@app.route('/internal/logout', methods=['GET', 'POST'])
Julian Rother's avatar
Julian Rother committed
537
def logout():
538
	session.pop('user', None)
Julian Rother's avatar
Julian Rother committed
539
	return redirect(request.values.get('ref', url_for('index')))
Julian Rother's avatar
Julian Rother committed
540

541
@app.route('/internal/auth')
542
543
544
545
def auth(): # For use with nginx auth_request
	if 'X-Original-Uri' not in request.headers:
		return 'Internal Server Error', 500
	url = request.headers['X-Original-Uri'].lstrip(config['VIDEOPREFIX'])
Julian Rother's avatar
Julian Rother committed
546
547
	if request.cookies.get('tracking', '') and request.cookies['tracking'].isdigit():
		cookie = int(request.cookies['tracking'])
548
	else:
Julian Rother's avatar
Julian Rother committed
549
		cookie = random.getrandbits(8*8-1)
550
	if url.endswith('jpg') or ismod():
551
		return "OK", 200
552
553
	if url.startswith('pub/hls/'):
		handle = url[len('pub/hls/'):].split('_')[0].split('.')[0]
554
		perms = query('''SELECT lectures.id AS lecture, perm.*
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
				FROM streams
				JOIN lectures ON (streams.lecture_id = lectures.id)
				JOIN courses ON (lectures.course_id = courses.id)
				LEFT JOIN perm ON ((lectures.id = perm.lecture_id OR courses.id = perm.course_id) AND NOT perm.deleted)
				WHERE streams.handle = ?
				AND (courses.visible AND lectures.visible AND streams.visible)
				ORDER BY perm.video_id DESC, perm.lecture_id DESC, perm.course_id DESC''', handle)
	else:
		perms = query('''SELECT videos.path, videos.id AS vid, perm.*
				FROM videos
				JOIN lectures ON (videos.lecture_id = lectures.id)
				JOIN courses ON (lectures.course_id = courses.id)
				LEFT JOIN perm ON ((videos.id = perm.video_id OR lectures.id = perm.lecture_id OR courses.id = perm.course_id) AND NOT perm.deleted)
				WHERE videos.path = ?
				AND (courses.visible AND lectures.visible AND videos.visible)
				ORDER BY perm.video_id DESC, perm.lecture_id DESC, perm.course_id DESC''',
				url)
572
	if not perms:
573
		return "Not allowed", 403
574
	auth = request.authorization
575
576
577
578
	username = password = None
	if auth:
		username = auth.username
		password = auth.password
579
	if checkperm(perms, username=username, password=password):
580
		try:
581
582
			if not url.startswith('pub/hls/'):
				modify('INSERT INTO log (id, `time`, `date`, video, source) VALUES (?, ?, ?, ?, 1)', cookie, datetime.now(), datetime.combine(date.today(), time()), perms[0]['vid'])
583
584
585
586
			elif url.endswith('.ts'):
				fmt = url.split('_')[-1].split('-')[0]
				seg = url.split('.')[0].split('-')[-1]
				modify('INSERT INTO hlslog (id, `time`, segment, lecture, handle, format) VALUES (?, ?, ?, ?, ?, ?)', cookie, datetime.now(), seg, perms[0]['lecture'], handle, fmt)
587
588
589
		except:
			pass
		r = make_response('OK', 200)
Julian Rother's avatar
Julian Rother committed
590
		r.set_cookie('tracking', str(cookie), max_age=2147483647) # Many many years
591
		return r
592
	password_auth = False
593
594
	for perm in perms:
		if perm['type'] == 'password':
595
596
597
			password_auth = True
			break
	if password_auth:
598
599
		return Response("Login required", 401, {'WWW-Authenticate': 'Basic realm="Login Required"'})
	return "Not allowed", 403
Andreas Valder's avatar
Andreas Valder committed
600

Julian Rother's avatar
Julian Rother committed
601
602
603
604
@app.route('/files/<filename>')
def files(filename):
	return redirect(config['VIDEOPREFIX']+'/'+filename)

Andreas Valder's avatar
Andreas Valder committed
605
@app.route('/sitemap.xml')
Andreas Valder's avatar
Andreas Valder committed
606
607
608
609
610
611
612
613
614
615
def sitemap():
	pages=[]
	# static pages
	for rule in app.url_map.iter_rules():
		if 'GET' in rule.methods and len(rule.arguments)==0:
			if rule.endpoint not in mod_endpoints:
				pages.append([rule.rule])
	for i in query('select * from courses where visible and listed'):
		pages.append([url_for('course',handle=i['handle'])])
		for j in query('select * from lectures where (course_id = ? and visible)',i['id']):
616
			pages.append([url_for('lecture',course=i['handle'],id=j['id'])])
Andreas Valder's avatar
Andreas Valder committed
617
618
619
620


	return Response(render_template('sitemap.xml', pages=pages), 200, {'Content-Type': 'application/atom+xml'} )

621
622
623
624
625

@app.route('/site/')
@app.route('/site/<string:phpfile>')
def legacy(phpfile=None):
	if phpfile=='embed.php' and ('lecture' in request.args):
626
627
628
629
		courses = query('SELECT courses.handle FROM courses JOIN lectures ON courses.id = lectures.course_id WHERE lectures.id = ?', request.args['lecture'])
		if not courses:
			return render_endpoint('index', 'Diese Seite existiert nicht!'), 404
		return redirect(url_for('embed', course=courses[0]['handle'], id=request.args['lecture']),code=302)
630
631
632
633
634
635
636
637
	if phpfile=='embed.php' and ('vid' in request.args):
		lectures = query('SELECT lecture_id FROM videos WHERE id = ?', request.args['vid'])
		if not lectures:
			return render_endpoint('index', 'Dieses Videos existiert nicht!'), 404
		courses = query('SELECT courses.handle FROM courses JOIN lectures ON courses.id = lectures.course_id WHERE lectures.id = ?', lectures[0]['lecture_id'])
		if not courses:
			return render_endpoint('index', 'Diese Seite existiert nicht!'), 404
		return redirect(url_for('embed', course=courses[0]['handle'], id=lectures[0]['lecture_id']),code=302)
638
639
640
641
642
643
644
645
	if phpfile=='feed.php' and ('all' in request.args):
		return redirect(url_for('feed'),code=302)
	if phpfile=='feed.php' and ('newcourses' in request.args):
		return redirect(url_for('courses_feed'),code=302)
	if phpfile=='feed.php':
		return redirect(url_for('feed', handle=request.args.copy().popitem()[0]),code=302)
	print("Unknown legacy url:",request.url)
	return redirect(url_for('index'),code=302)
Julian Rother's avatar
Julian Rother committed
646
647
648
649
650
651
652
653
654
655
656
657

import json

@app.route('/internal/dbstatus')
@register_navbar('DB-Status', icon='ok')
@mod_required
def dbstatus():
	hosts = set()
	clusters = {}
	status = {}
	variables = {}
	for host in config.get('MYSQL_DBSTATUS_HOSTS', [])+[config.get('MYSQL_HOST', None)]:
Andreas Valder's avatar
Andreas Valder committed
658
659
660
661
662
		try:
			for _host in show('SHOW VARIABLES LIKE "wsrep_cluster_address"', host=host)['wsrep_cluster_address'][len('gcomm://'):].split(','):
				hosts.add(_host)
		except:
			pass
Julian Rother's avatar
Julian Rother committed
663
	for host in sorted(list(hosts)):
Julian Rother's avatar
Julian Rother committed
664
665
666
667
668
669
670
671
672
673
674
675
		try:
			status[host] = show('SHOW GLOBAL STATUS LIKE "wsrep%"', host=host)
			variables[host] = show('SHOW GLOBAL VARIABLES LIKE "wsrep%"', host=host)
		except:
			status[host] = {'wsrep_cluster_state_uuid': '', 'wsrep_local_state_comment': 'Not reachable', 'wsrep_cluster_conf_id': '0', 'wsrep_cluster_status': 'Unknown'}
			variables[host] = {'wsrep_node_name': host, 'wsrep_cluster_name': 'unknown'}
		cluster = variables[host]['wsrep_cluster_name']+'-'+status[host]['wsrep_cluster_conf_id']
		if cluster not in clusters:
			clusters[cluster] = []
		clusters[cluster].append(host)
	return render_template('dbstatus.html', clusters=clusters, statuses=status, vars=variables), 200

676
677
678
679
680
681
682
@app.template_global()
def is_readonly():
	try:
		return show('SHOW GLOBAL STATUS LIKE "wsrep_ready"')['wsrep_ready'] != 'ON'
	except:
		return True

Andreas Valder's avatar
Andreas Valder committed
683
import edit
Julian Rother's avatar
Julian Rother committed
684
import feeds
685
import importer
686
import stats
Andreas Valder's avatar
Andreas Valder committed
687
import sorter
688
689
if 'ICAL_URL' in config:
	import meetings
690
import l2pauth
Andreas Valder's avatar
Andreas Valder committed
691
692
if 'JOBS_API_KEY' in config:
	import jobs
Andreas Valder's avatar
Andreas Valder committed
693
import timetable
Andreas Valder's avatar
Andreas Valder committed
694
import chapters
695
import icalexport
696
import livestreams