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server.py
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server.py
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from functools import wraps
from flask import request, session, Response, render_template, redirect, send_from_directory, abort, flash
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import and_, ForeignKey, func
from sqlalchemy.types import ARRAY
from flask_session import Session
from Crypto.Util.number import bytes_to_long, long_to_bytes
import hashlib
import os
import datetime
from datetime import timedelta
import hashlib
import random
import re
import json
import zlib
import base64
import sys
import zipfile
from database import *
import csv
app = Flask(__name__)
db.app = app
db.init_app(app)
#flag login
USERNAME_REGEX = re.compile(r'[0-9a-zA-Z_!@#€\-&+]{4,32}')
USERNAME_INVALID = 'Invalid username, must match [0-9a-zA-Z_!@#€-&+]{4,32}'
USERNAME_PASSWORD_INVALID = 'Wrong username and/or password'
USERNAME_TAKEN = 'Username already taken'
USER_MAIL_TAKEN = 'Email already registered'
MIN_PSW_LENGTH = 6
APIKEY_INVALID_PREFIX = "invalid_"
app.secret_key = 'TSMBhyuIY8l0BYlYAQoA1dUYEGJzmTJADZaPWCJ4ucbAwwnePQ3t/dsLdz/ghfWL'
SQLALCHEMY_DATABASE_URI = 'sqlite:///database.db'
SALT_LENGTH = 8
#flask & SQLalchemy configs
app.config['SESSION_TYPE'] = 'filesystem'
app.config['SESSION_USE_SIGNER'] = True #cookie cifrati con secret key
app.config['PERMANENT_SESSION_LIFETIME'] = timedelta(days=31)
app.config['SESSION_FILE_THRESHOLD'] = 500
app.config['SQLALCHEMY_DATABASE_URI'] = SQLALCHEMY_DATABASE_URI
app.config['SQLALCHEMY_POOL_RECYCLE'] = 299
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = False
app.config['TEMPLATES_AUTO_RELOAD'] = True
Session(app)
#authentification decorator
def require_auth(func):
'''Checks whether user is logged in or redirect to login.'''
@wraps(func)
def wrapper(*args, **kwargs):
if 'apikey' not in session:
return redirect('/')
user = User.query.filter_by(apikey = session['apikey']).first()
if user == None:
return redirect('/')
return func(*args, **kwargs)
return wrapper
#SITE ROUTES: connetto le sottopagine
@app.route('/', methods = ['GET'])
def index(): #se login va a buon fine vado in portfolio, altrimenti ritorno a home
print("\n >>> MINERVA SERVER TRACE: @index\n")
if 'apikey' in session and User.query.filter_by(apikey = session['apikey']).first() != None:
return redirect('/portfolio')
return render_template('index.html')
@app.route('/about_us', methods = ['GET']) #pubblica, non richiede autentificazione
def about_us():
print("\n >>> MINERVA SERVER TRACE: @about_us\n")
return render_template('about_us.html')
@app.route('/portfolio', methods = ['GET', 'POST'])
@require_auth
def portfolio():
if request.method == 'POST':
print("\n >>> MINERVA SERVER TRACE: placing order\n")
user = User.query.filter_by(apikey = session['apikey']).first()
if(request.form['tipo'] == "sell"):
coin_from = request.form['from_crypto']
coin_to = request.form['to_crypto']
price = request.form['price']
amount = request.form['amount']
sell_fun(user, coin_from, coin_to, price, amount)
else:
if(request.form['tipo'] == "buy"):
coin_from = request.form['from_crypto']
coin_to = request.form['to_crypto']
price = request.form['price']
amount = request.form['amount']
buy_fun(user, coin_from, coin_to, price, amount)
return redirect("/portfolio")
if request.method == 'GET':
print("\n >>> MINERVA SERVER TRACE: @portfolio\n")
user = User.query.filter_by(apikey = session['apikey']).first()
wallet_to_csv('static/me.csv', user.id)
transactions_to_csv("static/transactions_me.csv", user.id)
return render_template('portfolio.html', user = user)
@app.route('/sign_up', methods = ['POST'])
def sign_up():
if request.method == 'POST':
username = request.form['username']
password = request.form['password']
email = request.form['email']
capital = request.form['capital']
print("\n >>> MINERVA SERVER TRACE: @signup, form ok\n")
if len(password) < MIN_PSW_LENGTH:
flash('Password too short, should be at least %d characters' % MIN_PSW_LENGTH, 'danger')
print("\n >>> MINERVA SERVER TRACE: error, password too short (min 6 chars)\n")
return redirect('/')
match = USERNAME_REGEX.match(username)
if match == None or match.start() != 0 or match.end() != len(username):
flash(USERNAME_INVALID, 'danger')
print("\n >>> MINERVA SERVER TRACE: error, username invalid\n")
return redirect('/')
if User.query.filter_by(username=username).count() > 0:
flash(USERNAME_TAKEN, 'danger')
print("\n >>> MINERVA SERVER TRACE: error, username taken\n")
return redirect('/')
if User.query.filter_by(email=email).count() > 0:
flash(USER_MAIL_TAKEN, 'danger')
print("\n >>> MINERVA SERVER TRACE: error, email taken\n")
return redirect('/')
apikey = os.urandom(32).hex()
salt = os.urandom(SALT_LENGTH)
secret = hashlib.pbkdf2_hmac('sha256', password.encode(), salt, 10000).hex()
user = User(username = username,
email = email,
salt = salt.hex(),
password = secret,
apikey = apikey,
capital = capital)
db.session.add(user)
db.session.commit()
users = User.query.filter_by(username = username)
user = users.first()
session['apikey'] = user.apikey
populate_me(user.id)
db.session.commit()
print("\n >>> MINERVA SERVER TRACE: redirecting to PORTFOLIO\n")
return redirect('/portfolio')
@app.route('/login', methods=['POST', 'GET'])
def login():
print("\n >>> MINERVA SERVER TRACE: @login\n")
if request.method == 'GET':
if 'apikey' in session and User.query.filter_by(apikey = session['apikey']).first() != None:
flash("wrong apikey", 'danger')
print("\n >>> MINERVA SERVER TRACE: wrong apikey, redirecting to HOME\n")
return redirect('/')
else:
print("\n >>> MINERVA SERVER TRACE: redirecting to PORTFOLIO - solving issues with passing parameters\n")
return redirect('/portfolio')
elif request.method == 'POST':
username = request.form['username'].strip()
password = request.form['password']
match = USERNAME_REGEX.match(username)
if match == None or match.start() != 0 or match.end() != len(username):
flash(USERNAME_INVALID, 'danger')
print("\n >>> MINERVA SERVER TRACE: error no such user in db, redirecting to HOME\n")
return redirect('/')
users = User.query.filter_by(username = username)
if users.count() > 1: # shouldn't be possible due to integrity contraints
# WTF
flash("double user", 'danger')
print("\n >>> MINERVA SERVER TRACE: error double user, redirecting to HOME\n")
return redirect('/')
user = users.first()
if user == None:
flash(USERNAME_PASSWORD_INVALID, 'danger')
print("\n >>> MINERVA SERVER TRACE: error no user, redirecting to HOME\n")
return redirect('/')
salt = bytes.fromhex(user.salt)
psw = user.password
input_psw = hashlib.pbkdf2_hmac('sha256', password.encode(), salt, 10000).hex()
if input_psw != psw:
print("\n >>> MINERVA SERVER TRACE: error invalid password, redirecting to HOME\n")
flash(USERNAME_PASSWORD_INVALID, 'danger')
return redirect('/')
session['apikey'] = user.apikey
print("\n >>> MINERVA SERVER TRACE: redirecting to PORTFOLIO\n")
return redirect('/portfolio')
@app.route('/logout', methods = ['GET'])
@require_auth
def logout():
if 'apikey' in session:
del session['apikey']
print("\n >>> MINERVA SERVER TRACE: leaving page, redirecting to HOME\n")
return redirect('/')
if __name__ == '__main__':
db.drop_all()
print("\n >>> MINERVA SERVER TRACE: dropping DB\n")
db.create_all()
populate_moneta()
db.session.commit()
print("\n >>> MINERVA SERVER TRACE: DB on and populated\n")
print("\n >>> MINERVA SERVER TRACE: MTG website is online!\n")
app.run('0.0.0.0', 5005, debug=True)