162 lines
4.2 KiB
Python
162 lines
4.2 KiB
Python
# The core application of the Mia project.
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# by imacat <imacat@mail.imacat.idv.tw>, 2020/7/5
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# Copyright (c) 2020 imacat.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""The HTTP digest authentication utilities of the Mia core
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application.
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"""
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import ipaddress
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import socket
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from functools import wraps
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from django.db.models import F
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from django.db.models.functions import Now
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from django.http import HttpResponse, HttpRequest
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from geoip import geolite2
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from .models import User, Country
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class AccountBackend:
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"""The account backend for the django-digest module."""
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def get_partial_digest(self, username):
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"""Returns the HTTP digest authentication password digest hash
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of a user.
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Args:
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username (str): The log in user name.
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Return:
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str: The HTTP digest authentication password hash of
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the user, or None if the user does not exist.
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"""
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user = User.objects.filter(login_id=username).first()
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if user is None:
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return None
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return user.password
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def get_user(self, username):
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"""Returns the user by her log in user name.
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Args:
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username (str): The log in user name.
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Return:
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User: The user, or None if the user does not eixst.
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"""
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return User.objects.filter(login_id=username).first()
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def login_required(function=None):
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"""The decorator to check if the user has logged in, and send
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HTTP 401 if the user has not logged in.
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"""
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def decorator(view_func):
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@wraps(view_func)
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def _wrapped_view(request, *args, **kwargs):
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if request.user.is_anonymous:
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return HttpResponse(status=401)
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if "logout" in request.session:
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del request.session["logout"]
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if "visit_logged" in request.session:
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del request.session["visit_logged"]
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return HttpResponse(status=401)
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_log_visit(request)
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print(request.META["REMOTE_ADDR"])
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return view_func(request, *args, **kwargs)
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return _wrapped_view
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if function:
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return decorator(function)
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return decorator
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def _log_visit(request):
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"""Logs the visit information for the logged-in user.
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Args:
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request (HttpRequest): The request.
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"""
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if "visit_logged" in request.session:
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return
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user = request.user
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ip = request.META["REMOTE_ADDR"]
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User.objects.filter(pk=user.pk).update(
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visits=F("visits") + 1,
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visited_at=Now(),
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visited_ip=ip,
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visited_host=_get_host(ip),
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visited_country=_get_country(ip),
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)
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request.session["visit_logged"] = True
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def _get_host(ip):
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"""Look-up the host name by its IP.
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Args:
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ip (str): The IP
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Returns:
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str: The host name, or None if the look-up fails.
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"""
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try:
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return socket.gethostbyaddr(ip)[0]
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except Exception:
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return None
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def _get_country(ip):
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"""Look-up the country by its IP.
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Args:
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ip (str): The IP
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Returns:
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Country: The country.
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"""
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code = _get_country_code(ip)
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try:
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return Country.objects.get(code=code)
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except Country.DoesNotExist:
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pass
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return None
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def _get_country_code(ip):
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"""Look-up the country code by its IP.
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Args:
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ip (str): The IP
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Returns:
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str: The country code, or None if the look-up fails.
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"""
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try:
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return geolite2.lookup(ip).country
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except ValueError:
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pass
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except AttributeError:
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pass
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try:
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ipaddr = ipaddress.ip_address(ip)
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if ipaddr.is_private:
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return "AA"
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except ValueError:
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pass
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return None
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