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server.py 21.52 KiB
from flask import Flask, g, request, url_for, redirect, session, render_template, flash, Response, make_response
from werkzeug.routing import Rule
from functools import wraps
from datetime import date, timedelta, datetime, time, MINYEAR
import threading
import os
import sys
import hashlib
import random
import sched
import traceback
app = Flask(__name__)
app.jinja_env.trim_blocks = True
app.jinja_env.lstrip_blocks = True
app.add_template_global(random.randint, name='randint')
app.add_template_global(datetime, name='datetime')
app.add_template_global(timedelta, name='timedelta')
scheduler = sched.scheduler()
def run_scheduler():
import time
time.sleep(1) # UWSGI does weird things on startup
while True:
scheduler.run()
time.sleep(10)
def sched_func(delay, priority=0, firstdelay=None, args=[], kargs={}):
if firstdelay == None:
firstdelay = random.randint(1, 120)
def wrapper(func):
def sched_wrapper():
with app.test_request_context():
func(*args, **kargs)
scheduler.enter(delay, priority, sched_wrapper)
scheduler.enter(firstdelay, priority, sched_wrapper)
return func
return wrapper
threading.Thread(target=run_scheduler, daemon=True).start()
config = app.config
config.from_pyfile('config.py.example', silent=True)
if sys.argv[0].endswith('run.py'):
config['SQLITE_INIT_DATA'] = True
config['DEBUG'] = True
config.from_pyfile('config.py', silent=True)
if config['DEBUG']:
app.jinja_env.auto_reload = True
if not config.get('SECRET_KEY', None):
config['SECRET_KEY'] = os.urandom(24)
from db import query, modify, searchquery, ldapauth, ldapget
mod_endpoints = []
@app.template_global()
def ismod(*args):
return ('user' in session)
def mod_required(func):
mod_endpoints.append(func.__name__)
@wraps(func)
def decorator(*args, **kwargs):
if not ismod():
flash('Diese Funktion ist nur für Moderatoren verfügbar!')
return redirect(url_for('login', ref=request.url))
else:
return func(*args, **kwargs)
return decorator
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'}]
@app.template_filter()
def checkperm(perms, username=None, password=None):
perms = evalperm(perms)
for perm in perms:
if perm['type'] == 'public':
return True
elif perm['type'] == 'password':
if perm['param1'] == username and perm['param2'] == password:
return True
elif perm['type'] == 'l2p':
if perm['param1'] in session.get('l2p_courses', []):
return True
elif perm['type'] == 'rwth':
if session.get('rwthintern', False):
return True
return False
@app.template_filter()
def permdescr(perms):
perms = evalperm(perms)
public = False
password = False
l2p_courses = []
rwth_intern = False
for perm in perms:
if perm['type'] == 'public':
public = True
elif perm['type'] == 'password':
password = True
elif perm['type'] == 'l2p':
l2p_courses.append(perm['param'])
elif perm['type'] == 'rwth':
rwth_intern = True
if public or not perms:
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'
if l2p_courses:
if password:
return 'l2p', 'Nur für Teilnehmer der Veranstaltung und Nutzer mit Passwort verfügbar'
return 'l2p', 'Nur für Teilnehmer der Veranstaltung verfügbar'
if password:
return 'password', 'Nur für Nutzer mit Passwort verfügbar'
return 'public', 'Öffentlich verfügbar'
app.jinja_env.globals['navbar'] = []
# 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):
def wrapper(func):
endpoint = func.__name__
app.jinja_env.globals['navbar'].append((endpoint, name, iconlib, icon, not endpoint in mod_endpoints))
return func
return wrapper
def render_endpoint(endpoint, flashtext=None, **kargs):
if flashtext:
flash(flashtext)
# request.endpoint is used for navbar highlighting
request.url_rule = Rule(request.path, endpoint=endpoint)
return app.view_functions[endpoint](**kargs)
def handle_errors(endpoint, text, code, *errors, **epargs):
def wrapper(func):
@wraps(func)
def decorator(*args, **kwargs):
try:
return func(*args, **kwargs)
except errors:
if endpoint:
return make_response(render_endpoint(endpoint, text, **epargs), code)
else:
return text, code
return decorator
return wrapper
@app.errorhandler(404)
def handle_not_found(e):
return render_endpoint('index', 'Diese Seite existiert nicht!'), 404
@app.errorhandler(500)
@app.errorhandler(Exception)
def handle_internal_error(e):
traceback.print_exc()
return render_template('500.html')
@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()
# debian ships jinja2 without this test...
@app.template_test(name='equalto')
def equalto(a,b):
return a == b
@app.template_filter(name='semester')
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:])
@app.template_filter(name='date')
def human_date(d):
return d.strftime('%d.%m.%Y')
@app.template_filter(name='time')
def human_time(d):
return d.strftime('%H:%M')
@app.template_filter()
def rfc3339(d):
return d.strftime('%Y-%m-%dT%H:%M:%S+02:00')
@app.template_global()
def get_announcements(minlevel=0):
offset = timedelta()
if ismod():
offset = timedelta(hours=24)
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)
@app.template_filter()
def fixnl(s):
# To be remove, as soon as db schema is cleaned-up
return str(s).replace('\n', '<br>')
@app.route('/')
@register_navbar('Home', icon='home')
def index():
start = date.today() - timedelta(days=1)
end = start + timedelta(days=7)
upcomming = query('''
SELECT lectures.*, "course" AS sep, courses.*
FROM lectures
JOIN courses ON (lectures.course_id = courses.id)
WHERE (time > ?) AND (time < ?) and lectures.visible and courses.visible and courses.listed
ORDER BY time ASC LIMIT 30''',start,end)
for i in upcomming:
i['date'] = i['time'].date()
latestvideos=query('''
SELECT lectures.*, "course" AS sep, courses.*
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
ORDER BY MAX(videos.time_updated) DESC
LIMIT 6 ''',ismod())
featured = query('SELECT * FROM featured WHERE NOT deleted AND (? OR visible)', ismod())
return render_template('index.html', latestvideos=latestvideos, upcomming=upcomming, featured=featured)
@app.route('/course')
@register_navbar('Videos', icon='film')
def courses():
courses = query('SELECT * FROM courses WHERE (? OR (visible AND listed)) ORDER BY title', ismod())
for course in courses:
if course['semester'] == '':
course['semester'] = 'zeitlos'
groupedby = request.args.get('groupedby')
if groupedby not in ['title', 'semester', 'organizer']:
groupedby = 'semester'
return render_template('courses.html', courses=courses, groupedby=groupedby)
@app.route('/course/<handle>')
@app.route('/course/<int:id>')
@handle_errors('courses', 'Diese Veranstaltung existiert nicht!', 404, IndexError)
def course(id=None, handle=None):
if id:
course = query('SELECT * FROM courses WHERE id = ? AND (? OR visible)', id, ismod())[0]
else:
course = query('SELECT * FROM courses WHERE handle = ? AND (? OR visible)', handle, ismod())[0]
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'])
lectures = query('SELECT * FROM lectures WHERE course_id = ? AND (? OR visible) ORDER BY time, duration DESC', course['id'], ismod())
for lecture in lectures:
lecture['perm'] = []
lecture['course'] = course
for perm in perms:
if perm['lecture_id'] == lecture['id']:
lecture['perm'].append(perm)
videos = query('''
SELECT videos.*, (videos.downloadable AND courses.downloadable) as downloadable, formats.description AS format_description, formats.player_prio, formats.prio
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
''', course['id'], ismod())
return render_template('course.html', course=course, lectures=lectures, videos=videos)
@app.route('/faq')
@register_navbar('FAQ', icon='question-sign')
def faq():
return render_template('faq.html')
@app.route('/play/<int:id>')
@app.route('/embed/<int:id>', endpoint='embed')
@handle_errors('course', 'Diese Vorlesung existiert nicht!', 404, IndexError)
def lecture(id):
lecture = query('SELECT * FROM lectures WHERE id = ? AND (? OR visible)', id, ismod())[0]
videos = query('''
SELECT videos.*, (videos.downloadable AND courses.downloadable) as downloadable, formats.description AS format_description, formats.player_prio, formats.prio
FROM videos
JOIN formats ON (videos.video_format = formats.id)
JOIN courses ON (courses.id = ?)
WHERE videos.lecture_id = ? AND (? OR videos.visible)
ORDER BY formats.prio DESC
''', lecture['course_id'], lecture['id'], ismod())
perms = query('SELECT perm.* FROM perm WHERE ((NOT perm.deleted) AND (perm.lecture_id = ? OR perm.course_id = ?))',
lecture['id'], lecture['course_id'])
if not videos:
flash('Zu dieser Vorlesung wurden noch keine Videos veröffentlicht!')
courses = query('SELECT * FROM courses WHERE id = ? AND (? OR visible)', lecture['course_id'], ismod())
if not courses:
return render_endpoint('courses', 'Diese Veranstaltung existiert nicht!'), 404
chapters = query('SELECT * FROM chapters WHERE lecture_id = ? AND NOT deleted AND (? OR visible) ORDER BY time ASC', id, ismod())
if not checkperm(perms):
mode, text = permdescr(perms)
if mode == 'rwth':
flash(text+'. <a target="_blank" href="'+url_for('start_rwthauth')+'">Hier authorisieren</a>.')
elif mode == 'l2p':
flash(text+'. <a target="_blank" href="'+url_for('start_l2pauth')+'">Hier authorisieren</a>.')
else:
flash(text+'.')
return render_template('embed.html' if request.endpoint == 'embed' else 'lecture.html', course=courses[0], lecture=lecture, videos=videos, chapters=chapters)
@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'],
'courses', 'WHERE (? OR (visible AND listed)) GROUP BY id ORDER BY _score DESC, semester DESC LIMIT 20', ismod())
#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',
['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())
for lecture in lectures:
lecture['course'] = {}
for key in lecture:
if key.startswith('courses_'):
lecture['course'][key[8:]] = lecture[key]
return render_template('search.html', searchtext=request.args['q'], courses=courses, lectures=lectures)
def check_mod(user, groups):
return user and 'users' in groups
@app.route('/login', methods=['GET', 'POST'])
def login():
if request.method == 'GET':
return render_template('login.html')
user, groups = ldapauth(request.form.get('user'), request.form.get('password'))
if not check_mod(user, groups):
flash('Login fehlgeschlagen!')
return render_template('login.html')
session['user'] = ldapget(user)
dbuser = query('SELECT * FROM users WHERE name = ?', user)
if not dbuser:
modify('INSERT INTO users (name, realname, fsacc, level, calendar_key, rfc6238) VALUES (?, ?, ?, 1, "", "")', user, session['user']['givenName'], user)
dbuser = query('SELECT * FROM users WHERE name = ?', user)
session['user']['dbid'] = dbuser[0]['id']
return redirect(request.values.get('ref', url_for('index')))
@app.route('/logout', methods=['GET', 'POST'])
def logout():
session.pop('user')
return redirect(request.values.get('ref', url_for('index')))
# name: (tablename, idcolumn, [editable_fields], [fields_to_set_at_creation_time])
tabs = {
'courses': ('courses_data', 'id', ['visible', 'listed', 'title', 'short',
'handle', 'organizer', 'subject', 'semester', 'downloadable',
'internal', 'responsible','deleted','description'],
['created_by', 'time_created', 'time_updated']),
'lectures': ('lectures_data', 'id', ['visible', 'title', 'comment',
'internal', 'speaker', 'place', 'time', 'duration', 'jumplist','deleted'],
['course_id', 'time_created', 'time_updated']),
'videos': ('videos_data', 'id', ['visible','deleted'],
['created_by', 'time_created', 'time_updated']),
'chapters': ('chapters', 'id', ['time', 'text', 'visible', 'deleted'],
['created_by', 'time_created', 'time_updated']),
'announcements': ('announcements', 'id', ['text', 'level', 'visible',
'deleted', 'time_publish', 'time_expire'],
['created_by', 'time_created', 'time_updated']),
'featured': ('featured', 'id', ['title', 'text', 'internal', 'visible', 'deleted'],
['created_by', 'time_created', 'time_updated']),
'perm': ('perm', 'id', ['type', 'param1', 'param2', 'deleted'],
['course_id', 'lecture_id', 'video_id', 'created_by', 'time_created', 'time_updated']),
'sorterrorlog': ('sorterrorlog_data', 'id', ['deleted'],
['time_created', 'time_updated'])
}
@app.route('/edit', methods=['GET', 'POST'])
@mod_required
def edit(prefix='', ignore=[]):
# All editable tables are expected to have a 'time_updated' field
ignore.append('ref')
ignore.append('prefix')
if not prefix and 'prefix' in request.args:
prefix = request.args['prefix']
modify('BEGIN')
changes = request.values.items()
if (request.method == 'POST') and (request.get_json()):
changes = request.get_json().items()
for key, val in changes:
if key in ignore:
continue
key = prefix+key
table, id, column = key.split('.', 2)
assert table in tabs
assert column in tabs[table][2]
modify('INSERT INTO changelog (`table`,id_value, id_key, field, value_new, value_old, `when`, who, executed) VALUES (?,?,?,?,?,(SELECT %s FROM %s WHERE %s = ?),?,?,1)'%(column, tabs[table][0], tabs[table][1]),
table, id, tabs[table][1], column, val, id, datetime.now(), session['user']['dbid'])
modify('UPDATE %s SET %s = ?, time_updated = ? WHERE %s = ?'%(tabs[table][0], column, tabs[table][1]), val, datetime.now(), id)
modify('COMMIT')
if 'ref' in request.values:
return redirect(request.values['ref'])
return "OK", 200
@app.route('/new/<table>', methods=['GET', 'POST'])
@mod_required
def create(table):
assert table in tabs
defaults = {'created_by': session['user']['dbid'], 'time_created': datetime.now(), 'time_updated': datetime.now()}
columns = []
values = []
for column, val in defaults.items():
if column in tabs[table][3]:
columns.append(column)
values.append(val)
args = request.values
if (request.method == 'POST') and (request.get_json()):
args = request.get_json()
for column, val in args.items():
if column == 'ref':
continue
assert column in tabs[table][2]+tabs[table][3]
assert column not in defaults
columns.append(column)
values.append(val)
id = modify('INSERT INTO %s (%s) VALUES (%s)'%(tabs[table][0],
','.join(columns), ','.join(['?']*len(values))), *values)
if 'ref' in request.values:
return redirect(request.values['ref'])
return str(id), 200
@app.route('/auth')
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'])
ip = request.headers.get('X-Real-IP', '')
if url.endswith('jpg'):
return "OK", 200
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)
WHERE videos.path = ?
AND (? OR (courses.visible AND lectures.visible AND videos.visible))
ORDER BY perm.video_id DESC, perm.lecture_id DESC, perm.course_id DESC''',
url, ismod())
if not perms:
return "Not allowed", 403
auth = request.authorization
username = password = None
if auth:
username = auth.username
password = auth.password
if checkperm(perms, username=username, password=password):
return 'OK', 200
modify('INSERT INTO log VALUES (?, "", ?, "video", ?, ?)', ip, datetime.now(), perms[0]['vid'], url)
password_auth = False
for perm in perms:
if perm['type'] == 'password':
password_auth = True
break
if password_auth:
return Response("Login required", 401, {'WWW-Authenticate': 'Basic realm="Login Required"'})
return "Not allowed", 403
@app.route('/stats')
@register_navbar('Statistiken', icon='stats')
@mod_required
def stats():
return render_template('stats.html')
@app.route('/changelog')
@register_navbar('Changelog', icon='book')
@mod_required
def changelog():
changelog = query('SELECT * FROM changelog LEFT JOIN users ON (changelog.who = users.id) ORDER BY `when` DESC LIMIT 50')
for entry in changelog:
entry['path'] = '.'.join([entry['table'], entry['id_value'], entry['field']])
return render_template('changelog.html', changelog=changelog)
@app.route('/files/<filename>')
def files(filename):
return redirect(config['VIDEOPREFIX']+'/'+filename)
@app.route('/newchapter/<int:lectureid>', methods=['POST', 'GET'])
def suggest_chapter(lectureid):
time = request.values['time']
text = request.values['text']
assert(time and text)
try:
x = datetime.strptime(time,'%H:%M:%S')
time= timedelta(hours=x.hour,minutes=x.minute,seconds=x.second).total_seconds()
time = int(time)
except ValueError:
flash('Falsches Zeitformat, "%H:%M:%S" wird erwartet. Z.B. "01:39:42" für eine Kapitel bei Stunde 1, Minute 39, Sekunde 42')
submitter = None
if not ismod():
submitter = request.environ['REMOTE_ADDR']
id = modify('INSERT INTO chapters (lecture_id, time, text, time_created, time_updated, created_by, submitted_by) VALUES (?, ?, ?, ?, ?, ?, ?)',
lectureid, time, text, datetime.now(), datetime.now(), session.get('user', {'dbid':None})['dbid'], submitter)
if 'ref' in request.values:
return redirect(request.values['ref'])
return 'OK', 200
@app.route('/chapters/<int:lectureid>')
def chapters(lectureid):
chapters = query("SELECT * FROM chapters WHERE lecture_id = ? and visible ORDER BY time DESC", lectureid)
last = None
for c in chapters:
c['start'] = c['time']
c['end'] = last['start'] if last else 9999
last = c
return Response(render_template('chapters.srt',chapters=chapters), 200, {'Content-Type':'text/vtt'})
@app.route('/sitemap.xml')
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']):
pages.append([url_for('lecture',id=j['id'])])
return Response(render_template('sitemap.xml', pages=pages), 200, {'Content-Type': 'application/atom+xml'} )
import feeds
import importer
import sorter
if 'ICAL_URL' in config:
import meetings
if 'L2P_APIKEY' in config:
import l2pauth
import jobs
import timetable