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service.py
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service.py
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from hashlib import sha256
from uuid import uuid4
from datetime import datetime, timedelta
import json
import math
from flask import Flask \
, render_template \
, redirect \
, url_for \
, request
app = Flask(__name__)
import db
@app.route('/', methods=['GET'])
def index():
return redirect(url_for('register_form'))
@app.route('/register', methods=['GET'])
def register_form():
return render_template('register_form.html')
@app.route('/register', methods=['POST'])
def register():
login = request.form['login']
if not login:
return render_template('register_fail.html', reason='Empty login not allowed.')
password = request.form['password']
if len(password) < 6:
return render_template('register_fail.html', reason='Password is too short')
name = request.form['name'] or None
email = request.form['email'] or None
phone = request.form['phone'] or None
if db.user(login=login):
return render_template('register_fail.html', reason='User already exists.'.format(login))
db.user.insert(login=login,
password_hash=sha256(password.encode('UTF-8')).digest(),
name=name,
email=email,
phone=phone)
db.user.commit()
return render_template('register_ok.html', login=request.form['login'])
@app.route('/oauth/authorize', methods=['GET'])
def authorize_form():
response_type = request.args.get('response_type', None)
client_id = request.args.get('client_id', None)
state = request.args.get('state', None)
if client_id is None:
return render_template('authorize_fail.html', reason='Require client_id.')
try:
client_id = int(client_id)
except:
client_id = None
if client_id not in db.client:
return render_template('authorize_fail.html', reason='client_id is invalid.')
if response_type is None:
return redirect(db.client[client_id]['redirect_uri'] + '?error=invalid_request' +
('' if state is None else '&state=' + state), code=302)
if response_type != 'code':
return redirect(db.client[client_id]['redirect_uri'] + '?error=unsupported_response_type' +
('' if state is None else '&state=' + state), code=302)
return render_template('authorize_form.html', state=state,
client_id=client_id,
client_name=db.client[client_id]['name'])
@app.route('/oauth/authorize', methods=['POST'])
def authorize():
client_id = int(request.form.get('client_id'))
login = request.form.get('login')
password = request.form.get('password')
state = request.form.get('state', None)
if not db.user(login=login):
return redirect(db.client[client_id]['redirect_uri'] + '?error=access_denied' + ('' if state is None else '&state=' + state), code=302)
if db.user(login=login)[0]['password_hash'] != sha256(password.encode('UTF-8')).digest():
return redirect(db.client[client_id]['redirect_uri'] + '?error=access_denied' + ('' if state is None else '&state=' + state), code=302)
code=sha256(str(uuid4()).encode('UTF-8')).hexdigest()
db.authorization_code.insert(user_id=db.user(login=login)[0]['__id__'],
code=code,
expire_time=datetime.now() + timedelta(minutes=10))
db.authorization_code.commit()
return redirect(db.client[client_id]['redirect_uri'] + '?code=' + code + ('' if state is None else '&state=' + state), code=302)
@app.route('/oauth/token', methods=['POST'])
def token():
try:
grant_type = request.form.get('grant_type')
client_id = request.form.get('client_id')
client_secret = request.form.get('client_secret')
except KeyError:
return json.dumps({'error': 'invalid_request'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
try:
client_id = int(client_id)
except:
client_id = None
if client_id not in db.client or db.client[client_id]['secret'] != client_secret:
return json.dumps({'error': 'invalid_client'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
if grant_type == 'authorization_code':
try:
code = request.form.get('code')
except KeyError:
return json.dumps({'error': 'invalid_request'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
if not db.authorization_code(code=code) or db.authorization_code(code=code)[0]['expire_time'] < datetime.now():
return json.dumps({'error': 'invalid_grant'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
user_id = db.authorization_code(code=code)[0]['user_id']
db.authorization_code.delete(db.authorization_code(code=code))
db.authorization_code.commit()
elif grant_type == 'refresh_token':
try:
refresh_token = request.form.get('refresh_token')
except KeyError:
return json.dumps({'error': 'invalid_request'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
if not db.token(refresh=refresh_token):
return json.dumps({'error': 'invalid_grant'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
user_id = db.token(refresh=refresh_token)[0]['user_id']
db.token.delete(db.token(refresh=refresh_token))
db.token.commit()
else:
return json.dumps({'error': 'unsupported_grant_type'}), 400, {
'Content-Type': 'application/json;charset=UTF-8',
}
access_token = sha256(str(uuid4()).encode('UTF-8')).hexdigest()
expire_time = datetime.now() + timedelta(hours=1)
refresh_token = sha256(str(uuid4()).encode('UTF-8')).hexdigest()
db.token.insert(user_id=user_id,
access=access_token,
expire_time=expire_time,
refresh=refresh_token)
db.token.commit()
return json.dumps({
'access_token': access_token,
'token_type': 'bearer',
'expires_in': 3600,
'refresh_token': refresh_token,
}), 200, {
'Content-Type': 'application/json;charset=UTF-8',
'Cache-Control': 'no-store',
'Pragma': 'no-cache',
}
@app.route('/food/', methods=['GET'])
def get_food():
try:
per_page = int(request.args.get('per_page', 20))
if per_page < 20 or per_page > 100:
raise Exception()
page = int(request.args.get('page', 0))
if page < 0 or page > len(db.food) // per_page:
raise Exception()
except:
return '', 400
items = []
for i, food in enumerate(db.food):
if i < page * per_page:
continue
if i >= (page + 1) * per_page:
break
items.append({
'id': food['__id__'],
'name': food['name'],
'price': food['price'],
})
return json.dumps({
'items': items,
'per_page': per_page,
'page': page,
'page_count': math.ceil(len(db.food) / per_page)
}, indent=4), 200, {
'Content-Type': 'application/json;charset=UTF-8',
}
@app.route('/food/<id>', methods=['GET'])
def get_food_item(id):
try:
id = int(id)
if id not in db.food:
raise Exception()
except:
return '', 404
food = db.food[id]
return json.dumps({
'id': food['__id__'],
'name': food['name'],
'price': food['price'],
}, indent=4), 200, {
'Content-Type': 'application/json;charset=UTF-8',
}
@app.route('/me', methods=['GET'])
def get_me():
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
return json.dumps({
'login': db.user[user_id]['login'],
'name': db.user[user_id]['name'],
'email': db.user[user_id]['email'],
'phone': db.user[user_id]['phone'],
}, indent=4), 200, {
'Content-Type': 'application/json;charset=UTF-8',
}
@app.route('/orders/', methods=['GET'])
def get_orders():
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
try:
per_page = int(request.args.get('per_page', 20))
if per_page < 20 or per_page > 100:
raise Exception()
page = int(request.args.get('page', 0))
if page < 0 or page > len(db.order(user_id=user_id)) // per_page:
raise Exception()
except:
return '', 400
items = []
for i, order in enumerate(db.order(user_id=user_id)):
if i < page * per_page:
continue
if i >= (page + 1) * per_page:
break
items.append({
'id': order['__id__'],
'food': order['food'],
'delivery_location': order['delivery_location'],
'time_placed': order['time_placed'].isoformat(),
'time_delivered': None if order['time_delivered'] is None else order['time_delivered'].isoformat(),
})
return json.dumps({
'items': items,
'per_page': per_page,
'page': page,
'page_count': math.ceil(len(db.order) / per_page)
}, indent=4), 200, {
'Content-Type': 'application/json;charset=UTF-8',
}
@app.route('/orders/<id>', methods=['GET'])
def get_orders_item(id):
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
try:
id = int(id)
if id not in db.order or db.order[id]['user_id'] != user_id:
raise Exception()
except:
return '', 404
order = db.order[id]
return json.dumps({
'id': order['__id__'],
'food': order['food'],
'delivery_location': order['delivery_location'],
'time_placed': order['time_placed'].isoformat(),
'time_delivered': None if order['time_delivered'] is None else order['time_delivered'].isoformat(),
}, indent=4), 200, {
'Content-Type': 'application/json;charset=UTF-8',
}
@app.route('/orders/', methods=['POST'])
def post_orders():
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
try:
order = request.json
for food in order['food']:
if food['id'] not in db.food or 'amount' not in food:
raise Exception()
if 'delivery_location' not in order:
raise Exception()
except:
return '', 400
id = db.order.insert(user_id=user_id,
food=order['food'],
delivery_location=order['delivery_location'],
time_placed=datetime.now())
db.order.commit()
return '', 201, {
'Location': '/orders/{}'.format(id)
}
@app.route('/orders/<id>', methods=['DELETE'])
def delete_order_item(id):
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
try:
id = int(id)
if id not in db.order or db.order[id]['user_id'] != user_id:
raise Exception()
except:
return '', 404
db.order.delete(db.order[id])
db.order.commit()
return '', 200
@app.route('/orders/<id>', methods=['PUT'])
def put_order_item(id):
access_token = request.headers.get('Authorization', '')[len('Bearer '):]
if not db.token(access=access_token) or db.token(access=access_token)[0]['expire_time'] < datetime.now():
return '', 403
user_id = db.token(access=access_token)[0]['user_id']
try:
id = int(id)
if id not in db.order or db.order[id]['user_id'] != user_id:
raise Exception()
except:
return '', 404
try:
order = request.json
for food in order['food']:
if food['id'] not in db.food or 'amount' not in food:
raise Exception()
if 'delivery_location' not in order:
raise Exception()
except:
return '', 400
db.order.update(db.order[id], food=order['food'],
delivery_location=order['delivery_location'],
time_placed=datetime.now())
db.order.commit()
return '', 200
if __name__ == '__main__':
app.run(port=5050, debug=True)