313 lines
10 KiB
Python
313 lines
10 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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import sqlite3
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import threading
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import traceback
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import json
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from flask import Flask, render_template, abort, g, \
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redirect, session, request, flash, url_for
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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 time import sleep, time
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from collections import namedtuple
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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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app = Flask('at')
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app.secret_key = config.secret_key
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updater = None
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from functools import wraps
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def restrict_ip(prefix='', exclude=[]):
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def decorator(f):
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@wraps(f)
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def func(*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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abort(403)
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return f(*a, **kw)
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return func
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return decorator
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def req_to_ctx():
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return dict(request.form.iteritems())
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@app.template_filter('strfts')
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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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@app.before_request
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def make_connection():
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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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g.db = conn
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@app.teardown_request
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def close_connection(exception):
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g.db.close()
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DeviceInfo = namedtuple('DeviceInfo', ['hwaddr', 'name', 'owner', 'ignored'])
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User = namedtuple('User', ['id', '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, userid, 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['userid'], row['login'], None, row['url']) \
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if row['login'] else None
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ignored = row['ignored']
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yield DeviceInfo(row['hwaddr'], row['name'], 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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return None, None
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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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app.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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app.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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app.logger.warning('Cap file %s closed, reopening', self.cap_file)
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except Exception as e:
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app.logger.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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app.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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app.logger.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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@app.route('/')
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def main_view():
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return render_template('main.html', **now_at())
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@app.route('/api')
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def list_all():
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result = now_at()
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def prettify_user((user, atime)):
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return {
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'login': user.login,
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'timestamp': atime,
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'pretty_time': strfts(atime),
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'url': user.url,
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}
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result['users'] = map(prettify_user, result['users'])
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result['unknown'] = len(result['unknown'])
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return json.dumps(result)
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def now_at():
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devices = updater.get_active_devices()
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device_infos = list(get_device_infos(g.db, 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)
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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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@app.route('/register', methods=['GET'])
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@restrict_to_hs
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def register_form():
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return render_template('register.html', **req_to_ctx())
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@app.route('/register', methods=['POST'])
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@restrict_to_hs
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def register():
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login = request.form['login'].lower()
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url = request.form['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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g.db.execute('insert into users (login, url, pass) values (?, ?, ?)',
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[login, url, sha256(request.form['password']).hexdigest()])
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return redirect('/')
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except sqlite3.Error as e:
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flash('Cannot add user - username taken?', category='error')
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return register_form()
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@app.route('/login', methods=['GET'])
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@restrict_to_hs
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def login_form():
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return render_template('login.html', **req_to_ctx())
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def get_user(conn, login, password):
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row = conn.execute('select userid, login, pass, url from users where\
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login = ? and pass = ?', [login, sha256(password).hexdigest()]).fetchone()
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return row and User(row['userid'], row['login'], None, row['url'])
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@app.route('/login', methods=['POST'])
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@restrict_to_hs
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def login():
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login = request.form.get('login', '').lower()
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pwd = request.form.get('password', '')
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goto = request.values.get('goto') or '/'
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user = get_user(g.db, login, pwd)
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if user:
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session['userid'] = user.id
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session['login'] = user.login
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session['user'] = user
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return redirect(goto)
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else:
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flash('Username or password invalid', category='error')
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return login_form()
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@app.route('/logout')
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@restrict_to_hs
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def logout():
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session.clear()
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return redirect('/')
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def login_required(f):
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@wraps(f)
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def func(*a, **kw):
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if 'userid' not in session:
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flash('You must log in to continue', category='error')
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return redirect('/login?' +
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urlencode({'goto': request.path}))
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return f(*a, **kw)
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return func
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@app.route('/claim', methods=['GET'])
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@restrict_to_hs
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@login_required
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def claim_form():
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hwaddr, name = updater.get_device(request.remote_addr)
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return render_template('claim.html', hwaddr=hwaddr, name=name)
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@app.route('/claim', methods=['POST'])
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@restrict_to_hs
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@login_required
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def claim():
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hwaddr, lease_name = updater.get_device(request.remote_addr)
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ctx = None
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if not hwaddr:
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ctx = { 'error': 'Invalid device.' }
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else:
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userid = session['userid']
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try:
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g.db.execute('insert into devices (hwaddr, name, owner, ignored)\
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values (?, ?, ?, ?)', [hwaddr, request.form['name'], userid, False])
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ctx = {}
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except sqlite3.Error as e:
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ctx = { 'error': 'Could not add device! Perhaps someone claimed it?' }
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return render_template('post_claim.html', **ctx)
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def get_user_devices(conn, user):
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devs = conn.execute('select hwaddr, name, ignored from devices where\
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owner = ?', [user.id])
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return (DeviceInfo(row['hwaddr'], row['name'], user, row['ignored']) for
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row in devs)
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def set_password(conn, user, password):
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return conn.execute('update users set pass = ? where userid = ?',
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[sha256(password).hexdigest(), user.id])
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@app.route('/account', methods=['GET','POST'])
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@login_required
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def account():
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if request.method == 'POST':
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old = request.form['old']
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if get_user(g.db, session['login'], old) and \
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set_password(g.db, session['user'], request.form['new']):
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flash('Password changed', category='message')
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else:
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flash('Could not change password!', category='error')
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devices = get_user_devices(g.db, session['user'])
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return render_template('account.html', devices=devices)
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def set_ignored(conn, hwaddr, user, value):
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return conn.execute('update devices set ignored = ? where hwaddr = ? and owner = ?',
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[value, hwaddr, user.id])
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def delete_device(conn, hwaddr, user):
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return conn.execute('delete from devices where hwaddr = ? and owner = ?',
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[hwaddr, user.id])
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@app.route('/devices/<id>/<action>/')
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@login_required
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def device(id, action):
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user = session['user']
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if action == 'hide':
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set_ignored(g.db, id, user, True)
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if action == 'show':
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set_ignored(g.db, id, user, False)
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if action == 'delete':
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delete_device(g.db, id, user)
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return redirect(url_for('account'))
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port = 8080
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if __name__ == '__main__':
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import logging
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app.logger.setLevel(logging.DEBUG)
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updater = DnsmasqUpdater(config.lease_file, config.lease_offset, config.timeout)
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updater.start()
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app.run('0.0.0.0', config.port, debug=config.debug)
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