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tornado_interface.py
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tornado_interface.py
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# create tornado web server
import tornado
import tornado.web
import json
import backend
from http import HTTPStatus
import hashlib
import logging
from io import BytesIO
import sys
logger = logging.getLogger(__name__)
class BaseHandler(tornado.web.RequestHandler):
blacklisted_tokens = set()
def get_current_user(self):
if self.get_cookie("username") in BaseHandler.blacklisted_tokens:
return None
return self.get_signed_cookie("username").decode('utf-8')
class LoginHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
def post(self):
data = json.loads(self.request.body.decode('utf-8'))
username = data.get('username', None)
password = data.get('password', None)
if username is None or password is None:
self.write({"msg": "Missing username or password"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
# hash password with sha256
password = hashlib.sha256(password.encode('utf-8')).hexdigest()
try:
backend.login(username, password, self.conn)
self.write({"msg": "Logined successfully"})
self.set_signed_cookie("username", username)
except RuntimeError as ex:
logger.error(ex)
self.set_status(HTTPStatus.UNAUTHORIZED)
self.write({"msg": "Bad username or password"})
class LogoutHandler(BaseHandler):
@tornado.web.authenticated
def delete(self):
BaseHandler.blacklisted_tokens.add(self.get_cookie("username"))
self.clear_cookie("username")
self.write({"msg": "Successfully logged out"})
class AddUserHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def post(self):
try:
backend.check_admin(self.get_current_user(), self.conn)
except RuntimeError:
self.write({"msg": "You are not admin"})
self.set_status(HTTPStatus.FORBIDDEN)
return
username = self.get_argument('username', None)
password = self.get_argument('password', None)
if username is None or password is None:
self.write({"msg": "Missing username or password"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
if backend.check_user_exists(username, self.conn):
self.write({"msg": "User already exists"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
# hash password with sha256
password = hashlib.sha256(password.encode('utf-8')).hexdigest()
backend.add_user(username, password, self.conn)
self.write({"msg": "User added"})
class RemoveUserHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def delete(self):
try:
backend.check_admin(self.get_current_user(), self.conn)
except RuntimeError:
self.write({"msg": "You are not admin"})
self.set_status(HTTPStatus.FORBIDDEN)
return
username = self.get_argument('username', None)
if username is None:
self.write({"msg": "Missing username"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
if not backend.check_user_exists(username, self.conn):
self.write({"msg": "User does not exist"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
backend.remove_user(username, self.conn)
self.write({"msg": "User removed"})
class ListUsersHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
try:
backend.check_admin(self.get_current_user(), self.conn)
except RuntimeError:
self.write({"msg": "You are not admin"})
self.set_status(HTTPStatus.FORBIDDEN)
return
users = backend.list_users(self.conn)
users = [{"username": user[0], "password": user[1], "is_admin": user[2]} for user in users]
self.write(json.dumps(users))
class AddPacketHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def post(self):
size = self.get_argument('size', None)
time = self.get_argument('time', None)
username = self.get_current_user()
if size is None or time is None:
self.write({"msg": "Missing size or time"})
self.set_status(HTTPStatus.BAD_REQUEST)
return
backend.add_packet(size, time, username, self.conn)
self.write({"msg": "Packet added"})
class QueryPacketsHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
size_range = self.get_argument('size_range', "0,10000000000")
time_range = self.get_argument('time_range', "0,10000000000")
username = self.get_current_user()
try:
backend.check_admin(username, self.conn)
packets = backend.query_packets_admin(size_range, time_range, self.conn)
except RuntimeError:
packets = backend.query_packets_user(username, size_range, time_range, self.conn)
packets = [{"packet_id": packet[0], "packet_size": packet[1], "packet_time": packet[2], "user": packet[3]} for packet in packets]
self.write(json.dumps(packets))
class GetTotalHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
total_packets, total_size = backend.get_total(self.conn)
self.write({"total_packets": total_packets, "total_size": total_size})
class GetAverageHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
average = backend.get_average(self.conn)
self.write({"average": average})
class GetThroughputHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
# save plt to file
plt = backend.get_throughput(self.conn)
# get figure and set it's size to 12inch x 8inch
fig = plt.gcf()
fig.set_size_inches(12, 8)
buf = BytesIO()
plt.savefig(buf, format='png')
buf.seek(0)
content = buf.read()
# set content type to image/png
self.set_header('Content-Type', 'image/png')
self.write(content)
class GetPacketPlotHandler(BaseHandler):
def initialize(self, conn):
self.conn = conn
@tornado.web.authenticated
def get(self):
# save plt to file
plt = backend.get_packet_plot(self.conn)
# get figure and set it's size to 12inch x 8inch
fig = plt.gcf()
fig.set_size_inches(12, 8)
buf = BytesIO()
plt.savefig(buf, format='png')
buf.seek(0)
content = buf.read()
# set content type to image/png
self.set_header('Content-Type', 'image/png')
self.write(content)
def main():
conn = backend.connect_db()
application = tornado.web.Application([
(r"/login", LoginHandler, { "conn": conn }),
(r"/logout", LogoutHandler),
(r"/add_user", AddUserHandler, { "conn": conn }),
(r"/remove_user", RemoveUserHandler, { "conn": conn }),
(r"/list_users", ListUsersHandler, { "conn": conn }),
(r"/add_packet", AddPacketHandler, { "conn": conn }),
(r"/query_packets", QueryPacketsHandler, { "conn": conn }),
(r"/get_total", GetTotalHandler, { "conn": conn }),
(r"/get_average", GetAverageHandler, { "conn": conn }),
(r"/get_throughput", GetThroughputHandler, { "conn": conn }),
(r"/get_packet_plot", GetPacketPlotHandler, { "conn": conn }),
], cookie_secret="__TODO:_GENERATE_YOUR_OWN_RANDOM_VALUE_HERE__")
# run server
application.listen(5001)
tornado.ioloop.IOLoop.current().start()
if __name__ == "__main__":
main()