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#!/usr/share/vyos-http-api-tools/bin/python3
#
# Copyright (C) 2019-2024 VyOS maintainers and contributors
#
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2 or later as
# published by the Free Software Foundation.
#
# 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os
import sys
import grp
import json
import logging
import signal
from time import sleep
from fastapi import FastAPI
from fastapi.exceptions import RequestValidationError
from uvicorn import Config as UvicornConfig
from uvicorn import Server as UvicornServer
from vyos.configsession import ConfigSession
from vyos.defaults import api_config_state
from api.session import SessionState
from api.rest.models import error
CFG_GROUP = 'vyattacfg'
debug = True
LOG = logging.getLogger('http_api')
logs_handler = logging.StreamHandler()
LOG.addHandler(logs_handler)
if debug:
LOG.setLevel(logging.DEBUG)
else:
LOG.setLevel(logging.INFO)
def load_server_config():
with open(api_config_state) as f:
config = json.load(f)
return config
app = FastAPI(debug=True,
title="VyOS API",
version="0.1.0")
@app.exception_handler(RequestValidationError)
async def validation_exception_handler(_request, exc):
return error(400, str(exc.errors()[0]))
###
# Modify uvicorn to allow reloading server within the configsession
###
server = None
shutdown = False
class ApiServerConfig(UvicornConfig):
pass
class ApiServer(UvicornServer):
def install_signal_handlers(self):
pass
def reload_handler(signum, frame):
# pylint: disable=global-statement
global server
LOG.debug('Reload signal received...')
if server is not None:
server.handle_exit(signum, frame)
server = None
LOG.info('Server stopping for reload...')
else:
LOG.warning('Reload called for non-running server...')
def shutdown_handler(signum, frame):
# pylint: disable=global-statement
global shutdown
LOG.debug('Shutdown signal received...')
server.handle_exit(signum, frame)
LOG.info('Server shutdown...')
shutdown = True
# end modify uvicorn
def flatten_keys(d: dict) -> list[dict]:
keys_list = []
for el in list(d['keys'].get('id', {})):
key = d['keys']['id'][el].get('key', '')
if key:
keys_list.append({'id': el, 'key': key})
return keys_list
def initialization(session: SessionState, app: FastAPI = app):
# pylint: disable=global-statement,broad-exception-caught,import-outside-toplevel
global server
try:
server_config = load_server_config()
except Exception as e:
LOG.critical(f'Failed to load the HTTP API server config: {e}')
sys.exit(1)
if 'keys' in server_config:
session.keys = flatten_keys(server_config)
rest_config = server_config.get('rest', {})
session.debug = bool('debug' in rest_config)
session.strict = bool('strict' in rest_config)
graphql_config = server_config.get('graphql', {})
session.origins = graphql_config.get('cors', {}).get('allow_origin', [])
if 'rest' in server_config:
session.rest = True
else:
session.rest = False
if 'graphql' in server_config:
session.graphql = True
if isinstance(server_config['graphql'], dict):
if 'introspection' in server_config['graphql']:
session.introspection = True
else:
session.introspection = False
# default values if not set explicitly
session.auth_type = server_config['graphql']['authentication']['type']
session.token_exp = server_config['graphql']['authentication']['expiration']
session.secret_len = server_config['graphql']['authentication']['secret_length']
else:
session.graphql = False
# pass session state
app.state = session
# add REST routes
if session.rest:
from api.rest.routers import rest_init
rest_init(app)
else:
from api.rest.routers import rest_clear
rest_clear(app)
# add GraphQL route
if session.graphql:
from api.graphql.routers import graphql_init
graphql_init(app)
else:
from api.graphql.routers import graphql_clear
graphql_clear(app)
LOG.debug('Active routes are:')
for r in app.routes:
LOG.debug(f'{r.path}')
config = ApiServerConfig(app, uds="/run/api.sock", proxy_headers=True)
server = ApiServer(config)
if __name__ == '__main__':
# systemd's user and group options don't work, do it by hand here,
# else no one else will be able to commit
cfg_group = grp.getgrnam(CFG_GROUP)
os.setgid(cfg_group.gr_gid)
# Need to set file permissions to 775 too so that every vyattacfg group member
# has write access to the running config
os.umask(0o002)
signal.signal(signal.SIGHUP, reload_handler)
signal.signal(signal.SIGTERM, shutdown_handler)
session_state = SessionState()
session_state.session = ConfigSession(os.getpid())
while True:
LOG.debug('Enter main loop...')
if shutdown:
break
if server is None:
initialization(session_state)
server.run()
sleep(1)
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