282 lines
9.3 KiB
Python

#
# This file is part of Plinth.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as
# published by the Free Software Foundation, either version 3 of the
# License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
from django.utils.translation import ugettext_lazy as _
import json
import logging
import os
from plinth import actions
from plinth import action_utils
from plinth.signals import domain_added, domain_removed
LOGGER = logging.getLogger(__name__)
# defaults for the credentials; @kitename acts as a placeholder and is
# understood (and replaced with the actual kitename) by pagekite.
BACKEND_HOST = 'localhost'
KITE_NAME = '@kitename'
KITE_SECRET = '@kitesecret'
# Augeas base path for Pagekite configuration files
CONF_PATH = '/files/etc/pagekite.d'
# Parameters that get stored in configuration service_on entries
SERVICE_PARAMS = ['protocol', 'kitename', 'backend_host', 'backend_port',
'secret']
# Predefined services are used to build the PredefinedServiceForm
#
# ATTENTION: When changing the params, make sure that the AddCustomServiceForm
# still recognizes when you try to add a service equal to a predefined one
PREDEFINED_SERVICES = {
'http': {
'params': {'protocol': 'http',
'kitename': KITE_NAME,
'backend_port': '80',
'backend_host': BACKEND_HOST,
'secret': KITE_SECRET},
'label': _('Web Server (HTTP)'),
'help_text': _('Site will be available at '
'<a href=\"http://{0}\">http://{0}</a>'),
},
'https': {
'params': {'protocol': 'https',
'kitename': KITE_NAME,
'backend_port': '443',
'backend_host': BACKEND_HOST,
'secret': KITE_SECRET},
'label': _('Web Server (HTTPS)'),
'help_text': _('Site will be available at '
'<a href=\"https://{0}\">https://{0}</a>'),
},
'ssh': {
'params': {'protocol': 'raw/22',
'kitename': KITE_NAME,
'backend_port': '22',
'backend_host': BACKEND_HOST,
'secret': KITE_SECRET},
'label': _('Secure Shell (SSH)'),
'help_text': _('See SSH client setup <a href="'
'https://pagekite.net/wiki/Howto/SshOverPageKite/">'
'instructions</a>')
},
}
def get_kite_details():
output = run(['get-kite'])
kite_details = output.split()
return {'kite_name': kite_details[0],
'kite_secret': kite_details[1]}
def get_pagekite_config():
"""
Return the current PageKite configuration by executing various actions.
"""
status = {}
# PageKite service enabled/disabled
# To enable PageKite two things are necessary:
# 1) pagekite not being disabled in /etc/pagekite.d/10_account.rc
# 2) the pagekite service running
is_disabled = (run(['is-disabled']).strip() == 'true')
service_running = action_utils.service_is_running('pagekite')
status['enabled'] = service_running and not is_disabled
# PageKite kite details
status.update(get_kite_details())
# PageKite frontend server
server = run(['get-frontend']).strip()
# Frontend entries are only considered valid if there's a ':' in
# them otherwise, pagekite refuses to work, and we only set values
# with ':'.
if ':' in server:
server_domain, server_port = server.split(':')
status['server_domain'] = server_domain
status['server_port'] = int(server_port)
else:
status['server_domain'] = server
# No valid entry exists, default to port 80. Hack: Return
# string instead of int to force setting port on save
status['server_port'] = '80'
return status
def get_pagekite_services():
"""Get enabled services. Returns two values:
1. predefined services: {'http': False, 'ssh': True, 'https': True}
2. custom services: [{'protocol': 'http', 'secret' 'nono', ..}, [..]}
"""
custom = []
predefined = {}
# set all predefined services to 'disabled' by default
[predefined.update({proto: False}) for proto in PREDEFINED_SERVICES.keys()]
# now, search for the enabled ones
for serviceline in run(['get-services']).split('\n'):
if not serviceline: # skip empty lines
continue
service = json.loads(serviceline)
for name, predefined_service in PREDEFINED_SERVICES.items():
if service == predefined_service['params']:
predefined[name] = True
break
else:
custom.append(service)
return predefined, custom
def prepare_service_for_display(service):
""" Add extra information that is used when displaying a service
- protocol is split into 'protocol' and 'frontend_port'
- detect whether 'subdomains' are supported (as boolean)
"""
protocol = service['protocol']
if '/' in protocol:
service['protocol'], service['frontend_port'] = protocol.split('/')
service['subdomains'] = service['kitename'].startswith('*.')
return service
def run(arguments, superuser=True, input=None):
"""Run a given command and raise exception if there was an error"""
command = 'pagekite'
if superuser:
return actions.superuser_run(command, arguments, input=input)
else:
return actions.run(command, arguments, input=input)
def convert_service_to_string(service):
""" Convert service dict into a ":"-separated parameter string
>>> convert_service_to_string({'kitename': '@kitename', \
'backend_host': 'localhost', 'secret': '@kitesecret', \
'protocol': 'https/443', 'backend_port': '443'})
'https/443:@kitename:localhost:443:@kitesecret'
"""
try:
service_string = ":".join([service[param] for param in SERVICE_PARAMS])
except KeyError:
raise ValueError("Could not parse params: %s " % service)
return service_string
def load_service(json_service):
""" create a service out of json command-line argument
1) parse json
2) only use the parameters that we need (SERVICE_PARAMS)
3) convert unicode to strings
"""
service = json.loads(json_service)
return dict((str(key), str(service[key])) for key in SERVICE_PARAMS)
def get_augeas_servicefile_path(protocol):
"""Get the augeas path where a service for a protocol should be stored
TODO: Once we use python3 switch from doctests to unittests
>>> get_augeas_servicefile_path('http')
'/files/etc/pagekite.d/80_http.rc/service_on'
>>> get_augeas_servicefile_path('https')
'/files/etc/pagekite.d/443_https.rc/service_on'
>>> get_augeas_servicefile_path('http/80')
'/files/etc/pagekite.d/80_http.rc/service_on'
>>> get_augeas_servicefile_path('http/8080')
'/files/etc/pagekite.d/8080_http.rc/service_on'
>>> get_augeas_servicefile_path('raw/22')
'/files/etc/pagekite.d/22_raw.rc/service_on'
>>> get_augeas_servicefile_path('xmpp')
Traceback (most recent call last):
...
ValueError: Unsupported protocol: xmpp
"""
if not protocol.startswith(("http", "https", "raw")):
raise ValueError('Unsupported protocol: %s' % protocol)
try:
_protocol, port = protocol.split('/')
except ValueError:
if protocol == 'http':
relpath = '80_http.rc'
elif protocol == 'https':
relpath = '443_https.rc'
else:
raise ValueError('Unsupported protocol: %s' % protocol)
else:
relpath = '%s_%s.rc' % (port, _protocol)
return os.path.join(CONF_PATH, relpath, 'service_on')
def update_names_module(initial_registration=False, enabled=None,
kite_name=None):
"""
Update the PageKite domain and services of the 'names' module.
- initial_registration: Boolean (optional): Register also if not enabled
- enabled: Boolean (optional) whether PageKite is enabled
- kite_name: String (optional)
"""
domain_removed.send_robust(sender='pagekite', domain_type='pagekite')
if enabled is None:
try:
enabled = get_pagekite_config()['enabled']
except IndexError:
enabled = False
if enabled:
# Get enabled services and kite name
services = get_pagekite_services()[0]
enabled_services = [service for service in services if
services[service]]
if kite_name is None:
try:
kite_name = get_kite_details()['kite_name']
except IndexError:
pass
else:
enabled_services = None
kite_name = None
if initial_registration or (enabled and kite_name):
domain_added.send_robust(
sender='pagekite', domain_type='pagekite', name=kite_name,
description=_('Pagekite'), services=enabled_services)
if __name__ == "__main__":
import doctest
doctest.testmod()