3DS-RPC/server.py
Spotlight 69293c6bf5
Upgrade Flask-Limiter
The issue involving `key_func` was it not being specified. Additionally, we currently only support the in-memory backend - this will need to be rectified at a future point, but serves our purposes at the moment.
2025-04-04 06:06:32 -05:00

892 lines
28 KiB
Python

# Created by Deltaion Lee (MCMi460) on Github
from flask import Flask, make_response, request, redirect, render_template, send_file
from flask_limiter import Limiter
from flask_limiter.util import get_remote_address
from flask_migrate import Migrate
from flask_sqlalchemy import SQLAlchemy
import sys, datetime, xmltodict, pickle, secrets
from sqlalchemy import select, update, insert, delete
from api.love2 import *
from api.private import CLIENT_ID, CLIENT_SECRET, HOST
from api.public import pretendoBotFC, nintendoBotFC
from api.networks import NetworkType, nameToNetworkType
from database import *
app = Flask(__name__)
app.config["SQLALCHEMY_DATABASE_URI"] = get_db_url()
db = SQLAlchemy()
db.init_app(app)
# We need to manually specify our base model's metadata after
# importing all other models using it as the declarative base.
# (See above with `from database import *`)
migrate = Migrate(app, db, target_metadata=Base.metadata)
limiter = Limiter(
get_remote_address,
app=app,
storage_uri="memory://"
)
API_ENDPOINT: str = 'https://discord.com/api/v10'
local = False
port = 2277
version = 0.31
agent = '3DS-RPC/'
frontend_uptime = datetime.datetime.now()
start_db_time(None, NetworkType.NINTENDO)
start_db_time(None, NetworkType.PRETENDO)
@app.errorhandler(404)
def handler404(e):
return render_template('dist/404.html')
disable_backend_warnings = False
try:
if sys.argv[1] == 'ignoreBackend' and local:
disable_backend_warnings = True
except:
pass
if local:
HOST = 'http://localhost:2277'
# Limiter limits
user_presence_limit = '3/minute'
new_user_limit = '2/minute'
cdn_limit = '60/minute'
toggler_limit = '5/minute'
# Database files
title_database = []
titles_to_uid = []
requests.packages.urllib3.disable_warnings(requests.packages.urllib3.exceptions.InsecureRequestWarning)
# Create title cache
def cache_titles():
global title_database, titles_to_uid
# Pull databases
database_path = './cache/'
if not os.path.exists(database_path):
os.mkdir(database_path)
database_path = os.path.join(database_path, 'databases.dat')
if os.path.isfile(database_path):
with open(database_path, 'rb') as file:
t = pickle.loads(file.read())
title_database = t[0]
titles_to_uid = t[1]
else:
title_database = []
titles_to_uid = []
# Create progress bar
bar = ProgressBar()
for region in ['US', 'JP', 'GB', 'KR', 'TW']:
title_database.append(
xmltodict.parse(requests.get('https://samurai.ctr.shop.nintendo.net/samurai/ws/%s/titles?shop_id=1&limit=5000&offset=0' % region, verify = False).text)
)
# Update progress bar as database requests complete
bar.update(.5 / 5)
titles_to_uid += requests.get('https://raw.githubusercontent.com/hax0kartik/3dsdb/master/jsons/list_%s.json' % region).json()
bar.update(.5 / 5)
bar.end() # End the progress bar
# Save databases to file
with open(database_path, 'wb') as file:
file.write(pickle.dumps(
(title_database,
titles_to_uid)
))
print('[Saved database to file]')
# Create entry in database with friendCode
def create_user(friend_code: int, network: NetworkType, add_new_instance: bool):
# Make sure the user isn't trying to create any registered bot friend code.
if int(friend_code) == int(pretendoBotFC):
raise Exception('invalid FC')
if int(friend_code) == int(nintendoBotFC):
raise Exception('invalid FC')
try:
if not add_new_instance:
raise Exception('UNIQUE constraint failed: friends.friendCode')
already_added_check = db.session.scalar(
select(Friend)
.where(Friend.friend_code == str(friend_code).zfill(12))
.where(Friend.network == network)
)
if already_added_check:
raise Exception('UNIQUE constraint failed: friends.friendCode')
db.session.add(Friend(
friend_code=str(friend_code).zfill(12),
network=network,
online=False,
title_id='0',
upd_id='0',
last_accessed=time.time() + 300,
account_creation=time.time(),
last_online=time.time(),
favorite_game=0
))
db.session.commit()
except Exception as e:
if 'UNIQUE constraint failed: friends.friendCode' in str(e):
db.session.execute(
update(Friend)
.where(Friend.friend_code == str(friend_code).zfill(12))
.where(Friend.network == network)
.values(last_accessed=time.time())
)
db.session.commit()
def fetch_bearer_token(code: str):
data = {
'client_id': '%s' % CLIENT_ID,
'client_secret': '%s' % CLIENT_SECRET,
'grant_type': 'authorization_code',
'code': code,
'redirect_uri': '%s/authorize' % HOST,
}
headers = {
'Content-Type': 'application/x-www-form-urlencoded',
}
r = requests.post('%s/oauth2/token' % API_ENDPOINT, data=data, headers=headers)
r.raise_for_status()
return r.json()
def refresh_bearer(token: str):
user = user_from_token(token)
data = {
'client_id': '%s' % CLIENT_ID,
'client_secret': '%s' % CLIENT_SECRET,
'grant_type': 'refresh_token',
'refresh_token': user.refresh_token,
}
headers = {
'Content-Type': 'application/x-www-form-urlencoded',
}
r = requests.post('%s/oauth2/token' % API_ENDPOINT, data=data, headers=headers)
r.raise_for_status()
token, user, pfp = create_discord_user('', r.json())
return token, user, pfp
def token_from_id(discord_id: int) -> str:
stmt = select(Discord).where(Discord.id == discord_id)
result = db.session.scalar(stmt)
return result.site_session_token
def user_from_token(token: str) -> Discord:
stmt = select(Discord).where(Discord.site_session_token == token)
result = db.session.scalar(stmt)
if not result:
raise Exception('invalid token!')
return result
def create_discord_user(code: str, response: dict = None):
if not response:
response = fetch_bearer_token(code)
headers = {
'Authorization': 'Bearer %s' % response['access_token'],
}
new = requests.get('https://discord.com/api/users/@me', headers=headers)
user = new.json()
token = secrets.token_hex(20)
try:
already_exist_check = db.session.scalar(
select(Discord)
.where(Discord.id == user['id'])
)
if already_exist_check:
raise Exception('UNIQUE constraint failed: discord.id')
db.session.add(Discord(
id=user['id'],
refresh_token=response['refresh_token'],
bearer_token=response['access_token'],
rpc_session_token=None,
site_session_token=token,
last_accessed=0,
generation_date=time.time()
))
db.session.commit()
except Exception as e:
if 'UNIQUE constraint failed' in str(e):
old_token = token_from_id(user['id'])
discord_user = user_from_token(old_token)
discord_user.refresh_token = response['refresh_token']
discord_user.bearer_token = response['access_token']
discord_user.generation_date = time.time()
discord_user.site_session_token = token
db.session.commit()
if user['avatar']:
if user['avatar'].startswith('a_'):
avatar_extension = 'gif'
else:
avatar_extension = 'png'
avatar_url = 'https://cdn.discordapp.com/avatars/%s/%s.%s' % (user['id'], user['avatar'], avatar_extension)
else:
avatar_url = ''
return token, user['username'], avatar_url
def delete_discord_user(discord_id: int):
db.session.delete(db.session.get(Discord, discord_id))
db.session.delete(db.session.get(DiscordFriends, discord_id))
db.session.commit()
def get_connected_consoles(discord_id: int):
stmt = select(DiscordFriends).where(DiscordFriends.id == discord_id)
result = db.session.scalars(stmt).all()
return [(result.friend_code, result.active, result.network) for result in result]
def sidenav():
nintendo_start_time = db.session.get(Config, NetworkType.NINTENDO).backend_uptime
pretendo_start_time = db.session.get(Config, NetworkType.PRETENDO).backend_uptime
status = 'Offline'
if nintendo_start_time is not None and pretendo_start_time is not None:
status = 'Operational'
elif (nintendo_start_time is not None and pretendo_start_time is None) or (nintendo_start_time is None and pretendo_start_time is not None):
status = 'Semi-Operational'
# Get a human-readable uptime.
time_now = datetime.datetime.now()
if nintendo_start_time is not None:
nintendo_status = 'Nintendo Backend has been up for %s...' % str(time_now - nintendo_start_time)[:-7]
else:
nintendo_status = 'Nintendo Backend: Offline'
if pretendo_start_time is not None:
pretendo_status = 'Pretendo Backend has been up for %s...' % str(time_now - pretendo_start_time)[:-7]
else:
pretendo_status = 'Pretendo Backend: Offline'
# Trim off microseconds
frontend_status = str(datetime.datetime.now() - frontend_uptime)[:-7]
data = {
'uptime': frontend_status,
'nintendo-uptime-backend': nintendo_status,
'pretendo-uptime-backend': pretendo_status,
'status': status,
}
return data
def user_agent_check():
user_agent = request.headers['User-Agent']
try:
if float(user_agent.replace(agent, '')) != version:
raise Exception('client is not v%s' % version)
except:
raise Exception('this client is invalid')
def get_presence(friend_code: int, network: NetworkType, is_api: bool):
try:
if is_api:
# First, run 3DS-RPC client checks.
user_agent_check()
# Create a user for this friend code, or update its last access date.
# TODO(spotlightishere): This should be restructured!
create_user(friend_code, network, False)
network_start_time = db.session.get(Config, network).backend_uptime
if network_start_time is None and not disable_backend_warnings:
raise Exception('Backend currently offline. please try again later')
friend_code = str(friend_code).zfill(12)
principal_id = friend_code_to_principal_id(friend_code)
stmt = (
select(Friend)
.where(Friend.friend_code == friend_code)
.where(Friend.network == network)
)
result = db.session.scalar(stmt)
if not result:
raise Exception('Friend code not recognized!\nHint: You may not have added the bot as a friend')
if result.online:
presence = {
'titleID': result.title_id,
'updateID': result.upd_id,
'joinable': result.joinable,
'gameDescription': result.game_description,
'game': getTitle(result.title_id, titles_to_uid, title_database),
'disclaimer': 'all information regarding the title (User/Presence/game) is downloaded from Nintendo APIs',
}
else:
presence = {}
mii = result.mii
if mii:
mii = MiiData().mii_studio_url(mii)
return {
'Exception': False,
'User': {
'principalId': principal_id,
'friendCode': str(friend_code).zfill(12),
'online': result.online,
'Presence': presence,
'username': result.username,
'message': result.message,
'mii': mii,
'accountCreation': result.account_creation,
'lastAccessed': result.last_accessed,
'lastOnline': result.last_online,
'favoriteGame': result.favorite_game,
}
}
except Exception as e:
return {
'Exception': {
'Error': str(e),
}
}
##################
# NON-API ROUTES #
##################
# Index page
@app.route('/')
def index():
stmt = (
select(Friend)
.where(Friend.online == True)
.where(Friend.username != None)
.order_by(Friend.last_accessed.desc())
)
results = db.session.scalars(stmt).all()
num = len(results)
data = sidenav()
data['active'] = [({
'mii': MiiData().mii_studio_url(user.mii),
'username': user.username,
'game': getTitle(user.title_id, titles_to_uid, title_database),
'friendCode': user.friend_code.zfill(12),
'joinable': user.joinable,
'network': user.network.lower_name(),
}) for user in results if user.username]
data['active'] = data['active'][:2]
stmt = (
select(Friend)
.where(Friend.username != None)
.order_by(Friend.account_creation.desc())
.limit(6)
)
results = db.session.scalars(stmt).all()
data['new'] = [({
'mii': MiiData().mii_studio_url(user.mii),
'username': user.username,
'game': getTitle(user.title_id, titles_to_uid, title_database) if user.online and user.title_id != 0 else '',
'friendCode': user.friend_code.zfill(12),
'joinable': user.joinable,
'network': user.network.lower_name(),
}) for user in results if user.username]
data['new'] = data['new'][:2]
data['num'] = num
response = make_response(render_template('dist/index.html', data=data))
return response
# Index page
@app.route('/index.html')
def index_html():
return index()
# Favicon
@app.route('/favicon.ico')
def favicon():
return send_file('static/assets/img/favicon.ico')
# Settings page
@app.route('/settings')
def settings():
if not request.cookies.get('token'):
return redirect('/connect')
data = {
'consoles': [],
}
data = sidenav()
try:
stmt = (
select(Discord)
.where(Discord.site_session_token == request.cookies['token'])
)
result = db.session.scalar(stmt)
except Exception as e:
if 'invalid token' in str(e):
response = make_response(redirect('/'))
response.set_cookie('token', '', expires=0)
response.set_cookie('user', '', expires=0)
response.set_cookie('pfp', '', expires=0)
return response
return redirect('/')
data['profileButton'] = result.show_profile_button
data['smallImage'] = result.show_small_image
response = make_response(render_template('dist/settings.html', data=data))
return response
@app.route('/settings.html')
def settings_redirect():
return redirect('/settings')
# Roster page
@app.route('/roster')
def roster():
stmt = (
select(Friend)
.where(Friend.username != None)
.order_by(Friend.account_creation.desc())
.limit(8)
)
results = db.session.scalars(stmt).all()
data = sidenav()
data['title'] = 'New Users'
data['users'] = [({
'mii': MiiData().mii_studio_url(user.mii),
'username': user.username,
'game': getTitle(user.title_id, titles_to_uid, title_database),
'friendCode': user.friend_code.zfill(12),
'joinable': user.joinable,
'network': user.network.lower_name(),
}) for user in results if user.username]
response = make_response(render_template('dist/users.html', data=data))
return response
# Active page
@app.route('/active')
def active():
stmt = (
select(Friend)
.where(Friend.username != None)
.where(Friend.online)
.order_by(Friend.account_creation.desc())
)
results = db.session.scalars(stmt).all()
data = sidenav()
data['title'] = 'Active Users'
data['users'] = [({
'mii': MiiData().mii_studio_url(user.mii),
'username': user.username,
'game': getTitle(user.title_id, titles_to_uid, title_database),
'friendCode': user.friend_code.zfill(12),
'joinable': user.joinable,
'network': user.network.lower_name(),
}) for user in results if user.username]
response = make_response(render_template('dist/users.html', data=data))
return response
# Register page
@app.route('/register.html')
def register():
network = request.args.get('network')
if network is None:
return make_response(render_template('dist/registerselectnetwork.html'))
try:
network = NetworkType[network.upper()]
response = make_response(render_template('dist/register.html', data = {
'botFC': '-'.join(network.friend_code()[i:i+4] for i in range(0, len(network.friend_code()), 4)),
'network': network
}))
return response
except:
return make_response(render_template('dist/registerselectnetwork.html'))
# Register page redirect
@app.route('/register')
def register_page():
return register()
# Connection page
@app.route('/connect')
def connect():
return render_template('dist/connect.html', data={'local': local})
@app.route('/discord')
def discord_connect():
return redirect('/connect')
# Failure page
@app.route('/failure.html')
def failure():
return render_template('dist/failure.html')
# Success page
@app.route('/success.html')
def success():
data = {
'url': 'user/' + request.args.get('fc'),
'fc': request.args.get('fc'),
'network': request.args.get('network')
}
return render_template('dist/success.html', data=data)
# Consoles page
@app.route('/consoles')
def consoles():
if not request.cookies.get('token'):
return redirect('/connect')
data = {
'consoles': [],
}
try:
discord_id = user_from_token(request.cookies['token']).id
except Exception as e:
if 'invalid token' in str(e):
response = make_response(redirect('/'))
response.set_cookie('token', '', expires=0)
response.set_cookie('user', '', expires=0)
response.set_cookie('pfp', '', expires=0)
return response
return redirect('/')
for console, active, network_type in get_connected_consoles(discord_id):
network = NetworkType(network_type)
stmt = (
select(Friend)
.where(Friend.friend_code == console)
.where(Friend.network == network)
)
result = db.session.scalar(stmt)
data['consoles'].append({
'fc': '-'.join(console[i:i+4] for i in range(0, 12, 4)),
'username': result.username,
'active': active,
'network': network.lower_name()
})
data.update(sidenav())
response = render_template('dist/consoles.html', data=data)
return response
@app.route('/user/<string:friend_code>/')
def user_page(friend_code: str):
network: NetworkType
try:
network = nameToNetworkType(request.args.get('network'))
friend_code_int = int(friend_code.replace('-', ''))
user_data = get_presence(friend_code_int, network, False)
if user_data['Exception'] or not user_data['User']['username']:
raise Exception(user_data['Exception'])
except:
return render_template('dist/404.html')
if not user_data['User']['online'] or not user_data['User']['Presence']:
user_data['User']['Presence']['game'] = None
user_data['User']['favoriteGame'] = getTitle(user_data['User']['favoriteGame'], titles_to_uid, title_database)
user_data['User']['network'] = network.lower_name()
if user_data['User']['favoriteGame']['name'] == 'Home Screen':
user_data['User']['favoriteGame'] = None
for i in ('accountCreation', 'lastAccessed', 'lastOnline'):
if user_data['User'][i] == 0:
user_data['User'][i] = 'Never'
elif time.time() - user_data['User'][i] > 86400:
user_data['User'][i] = datetime.datetime.fromtimestamp(user_data['User'][i]).strftime('%b %d, %Y')
elif time.time() - user_data['User'][i] > 600:
s = str(datetime.timedelta(seconds=int(time.time() - user_data['User'][i]))).split(':')
user_data['User'][i] = s[0] + 'h, ' + s[1] + 'm, ' + s[2] + 's ago'
else:
user_data['User'][i] = 'Just now'
# COMMENT/DELETE THIS BEFORE COMMITTING
# print(user_data)
user_data.update(sidenav())
response = make_response(render_template('dist/user.html', data = user_data))
return response
@app.route('/terms')
def terms():
return redirect('https://github.com/MCMi460/3DS-RPC/blob/main/TERMS.md')
##############
# API ROUTES #
##############
# Create entry in database with friendCode
@app.route('/api/user/create/<int:friend_code>/', methods=['POST'])
@limiter.limit(new_user_limit)
def new_user(friend_code: int, network: int = -1, user_check: bool = True):
try:
if user_check:
user_agent_check()
if network == -1:
network = NetworkType.NINTENDO
try:
request_arg = request.data.decode('utf-8').split(',')[0]
network = nameToNetworkType(request_arg)
except:
pass
create_user(friend_code, network, True)
return {
'Exception': False,
}
except Exception as e:
return {
'Exception': {
'Error': str(e),
}
}
# Grab presence from friendCode
@app.route('/api/user/<int:friend_code>/', methods=['GET'])
@limiter.limit(user_presence_limit)
def user_presence(friend_code: int):
# Check if a specific network is being specified as a query parameter.
network_name = request.args.get('network')
if network_name:
network = nameToNetworkType(network_name)
else:
network = NetworkType.NINTENDO
return get_presence(friend_code, network, True)
# Toggle
@app.route('/api/toggle/<int:friend_code>/', methods=['POST'])
@limiter.limit(toggler_limit)
def toggler(friend_code: int):
network = NetworkType.NINTENDO
if request.data.decode('utf-8').split(',')[2]:
network = nameToNetworkType(request.data.decode('utf-8').split(',')[2])
try:
fc = str(principal_id_to_friend_code(friend_code_to_principal_id(friend_code))).zfill(12)
except:
return 'failure!\nthat is not a real friendCode!'
stmt = (
select(Friend)
.where(Friend.friend_code == fc)
.where(Friend.network == network)
)
result = db.session.scalar(stmt)
if not result:
return 'failure!\nthat is not an existing friendCode!'
f = request.data.decode('utf-8').split(',')
token = f[0]
active = bool(int(f[1]))
discord_id = user_from_token(token).id
stmt = (
select(DiscordFriends)
.where(DiscordFriends.id == discord_id)
.where(DiscordFriends.friend_code == fc)
.where(DiscordFriends.network == network)
)
result = db.session.scalar(stmt)
if not result:
stmt = select(DiscordFriends).where(DiscordFriends.id == discord_id)
allFriends = db.session.scalars(stmt).all()
if len(allFriends) >= 10:
return 'failure!\nyou can\'t have more than ten consoles added at one time!'
if active:
db.session.execute(
update(DiscordFriends)
.where(DiscordFriends.active)
.where(DiscordFriends.id == discord_id)
.values(active = False)
)
if result:
db.session.execute(
update(DiscordFriends)
.where(DiscordFriends.friend_code == fc)
.where(DiscordFriends.network == network)
.where(DiscordFriends.id == discord_id)
.values(active=active)
)
else:
db.session.execute(
insert(DiscordFriends)
.values(id=discord_id, friend_code=fc, active=active, network=network)
)
db.session.commit()
return 'success!'
# Delete
@app.route('/api/delete/<int:friend_code>/', methods=['POST'])
@limiter.limit(toggler_limit)
def deleter(friend_code: int):
fc = str(principal_id_to_friend_code(friend_code_to_principal_id(friend_code))).zfill(12)
if not ',' in request.data.decode('utf-8'): # Old API compatiblity. In the future this should be depercated.
token = request.data.decode('utf-8')
discord_id = user_from_token(token).id
db.session.execute(
delete(DiscordFriends)
.where(DiscordFriends.friend_code == fc)
.where(DiscordFriends.network == NetworkType.NINTENDO)
.where(DiscordFriends.id == discord_id)
)
db.session.commit()
return 'success!'
data = request.data.decode('utf-8').split(',')
token = data[0]
network = nameToNetworkType(data[1])
discord_id = user_from_token(token).id
db.session.execute(
delete(DiscordFriends)
.where(DiscordFriends.friend_code == fc)
.where(DiscordFriends.network == network)
.where(DiscordFriends.id == discord_id)
)
db.session.commit()
return 'success!'
# Toggle one
@app.route('/api/settings/<string:which>/', methods=['POST'])
@limiter.limit(toggler_limit)
def settings_toggler(which: str):
toggle = bool(int(request.data.decode('utf-8')))
if not which in ('smallImage', 'profileButton'):
return 'failure!'
if which == 'smallImage':
which = 'show_small_image'
else:
which = 'show_profile_button'
try:
db.session.execute(
update(Discord)
.where(Discord.site_session_token == request.cookies['token'])
.values({getattr(Discord, which): toggle})
)
db.session.commit()
except:
return 'failure!'
return 'success!'
# Make Nintendo's cert a 'secure' cert
@app.route('/cdn/i/<string:file>/', methods=['GET'])
@limiter.limit(cdn_limit)
def cdn_image(file: str):
response = make_response(requests.get('https://kanzashi-ctr.cdn.nintendo.net/i/%s' % file, verify=False).content)
response.headers['Content-Type'] = 'image/jpeg'
return response
# Local image cache
@app.route('/cdn/l/<string:file>/', methods=['GET'])
@limiter.limit(cdn_limit)
def local_image_cdn(file: str):
file = hex(int(file, 16)).replace('0x', '').zfill(16).upper()
return send_file('cache/' + file + '.png')
# Login route
@app.route('/login', methods=['POST'])
@limiter.limit(new_user_limit)
def login():
try:
fc = str(principal_id_to_friend_code(friend_code_to_principal_id(request.form['fc']))).zfill(12)
if request.form['network'] is None:
network = NetworkType.NINTENDO
else:
network = NetworkType(int(request.form['network']))
new_user(fc, network, False)
except:
return redirect('/failure.html')
return redirect(f'/success.html?fc={fc}&network={network.lower_name()}')
# Discord route
@app.route('/authorize')
@limiter.limit(new_user_limit)
def authorize():
if not request.args.get('code'):
return render_template('dist/404.html')
token, user, pfp = create_discord_user(request.args['code'])
response = make_response(redirect('/consoles'))
response.set_cookie('token', token, expires=datetime.datetime.now() + datetime.timedelta(days=30))
response.set_cookie('user', user, expires=datetime.datetime.now() + datetime.timedelta(days=30))
response.set_cookie('pfp', pfp, expires=datetime.datetime.now() + datetime.timedelta(days=30))
return response
@app.route('/refresh')
def refresh():
if local:
try:
token, user, pfp = refresh_bearer(request.cookies['token'])
response = make_response(redirect('/consoles'))
response.set_cookie('token', token, expires=datetime.datetime.now() + datetime.timedelta(days=30))
response.set_cookie('user', user, expires=datetime.datetime.now() + datetime.timedelta(days=30))
response.set_cookie('pfp', pfp, expires=datetime.datetime.now() + datetime.timedelta(days=30))
return response
except:
delete_discord_user(user_from_token(request.cookies['token']).id)
return redirect('/404.html')
if __name__ == '__main__':
cache_titles()
if local:
app.run(host='0.0.0.0', port=port)
else:
import gevent.pywsgi
server = gevent.pywsgi.WSGIServer(('0.0.0.0', port), app)
server.serve_forever()