264 lines
8.9 KiB
Python
264 lines
8.9 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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import logging
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import sqlite3
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import threading
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import traceback
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from datetime import datetime
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from wsgiref import simple_server
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from pesto import Response, dispatcher_app
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from pesto.session import session_middleware
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from pesto.session.memorysessionmanager import MemorySessionManager
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from time import sleep, time
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from collections import namedtuple
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from jinja2 import Environment, FileSystemLoader
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from urllib import urlencode
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from hashlib import sha256
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import config
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dispatcher = dispatcher_app()
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app = session_middleware(MemorySessionManager())(dispatcher)
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logger = logging.getLogger()
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env = Environment(loader=FileSystemLoader('templates'),
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autoescape='html',
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extensions=['jinja2.ext.autoescape'])
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conn = None
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updater = None
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from functools import wraps
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def render(filepath):
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def decorator(f):
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@wraps(f)
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def func(request, *a, **kw):
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template = env.get_template(filepath)
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data = f(request, *a, **kw)
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return Response([template.render(**data)])
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return func
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return decorator
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def restrict_ip(prefix='', exclude=[], fail_response=Response(status=403)):
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def decorator(f):
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@wraps(f)
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def func(request, *a, **kw):
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r_addr = request.remote_addr
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if not r_addr.startswith(prefix) or r_addr in exclude:
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return fail_response
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return f(request, *a, **kw)
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return func
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return decorator
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def strfts(ts, format='%d/%m/%Y %H:%M'):
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return datetime.fromtimestamp(ts).strftime(format)
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env.filters['strfts'] = strfts
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def setup_db():
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conn = sqlite3.connect(config.db)
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conn.row_factory = sqlite3.Row
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conn.isolation_level = None # for autocommit mode
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return conn
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DeviceInfo = namedtuple('DeviceInfo', ['hwaddr', 'owner', 'ignored'])
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User = namedtuple('User', ['login', 'passwd', 'url'])
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def get_device_info(conn, hwaddr):
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return list(get_device_infos(conn, (hwaddrs,)))[0]
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def get_device_infos(conn, hwaddrs):
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stmt = '''select hwaddr, name, ignored, login, url from
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devices left join users on devices.owner = users.userid
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where devices.hwaddr in (''' + ','.join(['?'] * len(hwaddrs)) + ')'
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for row in conn.execute(stmt, hwaddrs):
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owner = User(row['login'], None, row['url']) if row['login'] else None
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ignored = row['ignored']
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yield DeviceInfo(row['hwaddr'], owner, ignored)
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class Updater(threading.Thread):
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def __init__(self, timeout, *a, **kw):
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self.timeout = timeout
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self.lock = threading.Lock()
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self.active = {}
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threading.Thread.__init__(self, *a, **kw)
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def purge_stale(self):
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now = time()
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for addr, (atime, ip, name) in self.active.items():
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if now - atime > self.timeout:
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del self.active[addr]
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def get_active_devices(self):
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self.lock.acquire()
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self.purge_stale()
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r = dict(self.active)
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self.lock.release()
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return r
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def get_device(self, ip):
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for hwaddr, (atime, dip, name) in \
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self.get_active_devices().iteritems():
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if ip == dip:
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return hwaddr, name
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def update(self, hwaddr, atime = None, ip = None, name = None):
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atime = atime or time()
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self.lock.acquire()
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self.active[hwaddr] = (atime, ip, name)
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self.lock.release()
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logger.info('updated %s with atime %s and ip %s',
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hwaddr, strfts(atime), ip)
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class CapUpdater(Updater):
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def __init__(self, cap_file, *a, **kw):
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self.cap_file = cap_file
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Updater.__init__(self, *a, **kw)
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def run(self):
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while True:
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try:
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with open(self.cap_file, 'r', buffering=0) as f:
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logger.info('Updater ready on cap file %s', self.cap_file)
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while True:
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hwaddr = f.readline().strip()
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if not hwaddr:
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break
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self.update(hwaddr)
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logging.warning('Cap file %s closed, reopening', self.cap_file)
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except Exception as e:
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logging.error('Updater got an exception:\n' + \
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traceback.format_exc(e))
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sleep(10.0)
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class DnsmasqUpdater(Updater):
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def __init__(self, lease_file, lease_offset, *a, **kw):
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self.lease_file = lease_file
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self.lease_offset = lease_offset
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self.last_modified = 0
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Updater.__init__(self, *a, **kw)
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def run(self):
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import os
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while True:
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try:
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mtime = os.stat(self.lease_file).st_mtime
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if mtime > self.last_modified:
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logger.info('Lease file changed, updating')
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with open(self.lease_file, 'r') as f:
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for line in f:
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ts, hwaddr, ip, name, client_id = line.split(' ')
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self.update(hwaddr, int(ts) - self.lease_offset, ip, name)
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self.last_modified = mtime
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sleep(3.0)
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except Exception as e:
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logging.error('Updater got an exception:\n' + \
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traceback.format_exc(e))
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sleep(10.0)
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@dispatcher.match('/', 'GET')
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@render('main.html')
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def now_at(request):
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devices = updater.get_active_devices()
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device_infos = list(get_device_infos(conn, devices.keys()))
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device_infos.sort(key=lambda di: devices.__getitem__)
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users = list(dict((info.owner, devices[info.hwaddr][0]) for info in device_infos
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if info.owner and not info.ignored).iteritems())
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users.sort(key=lambda (u, a): a, reverse=True)
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unknown = set(devices.keys()) - set(d.hwaddr for d in device_infos)
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return dict(users=users, unknown=unknown, login=request.session.get('login'))
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restrict_to_hs = restrict_ip(prefix=config.claimable_prefix,
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exclude=config.claimable_exclude)
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@dispatcher.match('/register', 'GET')
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@restrict_to_hs
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@render('register.html')
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def register_form(request):
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return request.form
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@dispatcher.match('/register', 'POST')
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@restrict_to_hs
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def register(request):
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login = request['login']
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url = request['url']
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if 'wiki' in request.form:
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url = config.wiki_url % { 'login': login }
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try:
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conn.execute('insert into users (login, url, pass) values (?, ?, ?)',
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[login, url, sha256(request['password']).hexdigest()])
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return Response.redirect('/')
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except sqlite3.Error as e:
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request.form['error'] = 'Cannot add user - username taken?'
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return register_form(request)
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@dispatcher.match('/login', 'GET')
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@restrict_to_hs
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@render('login.html')
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def login_form(request):
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return request.form
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def get_credentials(login, password):
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row = conn.execute('select userid from users where login = ? and pass = ?',
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[login, sha256(password).hexdigest()]).fetchone()
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return row and row['userid']
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@dispatcher.match('/login', 'POST')
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@restrict_to_hs
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def login(request):
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login = request.get('login')
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pwd = request.get('password')
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goto = request.get('goto') or '/'
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userid = get_credentials(login, pwd)
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if userid:
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request.session['userid'] = userid
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request.session['login'] = login
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return Response.redirect(goto)
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else:
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request.form['error'] = 'Username or password invalid'
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return login_form(request)
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@dispatcher.match('/logout', 'GET')
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@restrict_to_hs
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def logout(request):
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request.session.clear()
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return Response.redirect('/')
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def login_required(f):
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@wraps(f)
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def func(request, *a, **kw):
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if 'userid' not in request.session:
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return Response.redirect('/login?' +
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urlencode({'goto': request.path_info,
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'error': 'You must log in to continue'}))
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return f(request, *a, **kw)
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return func
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@dispatcher.match('/claim', 'GET')
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@restrict_to_hs
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@login_required
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@render('claim.html')
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def claim_form(request):
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hwaddr, name = updater.get_device(request.remote_addr)
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return { 'hwaddr': hwaddr, 'name': name,
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'login': request.session['login'] }
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@dispatcher.match('/claim', 'POST')
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@restrict_to_hs
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@login_required
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@render('post_claim.html')
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def claim(request):
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hwaddr, lease_name = updater.get_device(request.remote_addr)
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if not hwaddr:
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return { 'error': 'Invalid device.' }
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userid = request.session['userid']
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try:
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conn.execute('insert into devices (hwaddr, name, owner, ignored)\
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values (?, ?, ?, ?)', [hwaddr, request['name'], userid, False])
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return {}
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except sqlite3.Error as e:
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return { 'error': 'Could not add device! Perhaps someone claimed it?' }
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port = 8080
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if __name__ == '__main__':
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print env.list_templates()
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logger.setLevel(logging.DEBUG)
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logger.addHandler(logging.StreamHandler())
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conn = setup_db()
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updater = DnsmasqUpdater(config.lease_file, config.lease_offset, config.timeout)
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updater.start()
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server = simple_server.make_server('', port, app)
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server.serve_forever()
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