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# Copyright 2022-2023 ETSI TeraFlowSDN - TFS OSG (https://tfs.etsi.org/)
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#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import functools, logging, threading, time
from typing import Optional, Union
from flask import Flask, request
from flask_restful import Api, Resource
from werkzeug.serving import make_server
from common.Settings import get_http_bind_address
logging.getLogger('werkzeug').setLevel(logging.WARNING)
def log_request(logger, response):
timestamp = time.strftime('[%Y-%b-%d %H:%M]')
logger.info('%s %s %s %s %s', timestamp, request.remote_addr, request.method, request.full_path, response.status)
return response
class GenericRestServer(threading.Thread):
def __init__(
self, bind_port : Union[str, int], base_url : str, bind_address : Optional[str] = None,
cls_name : str = __name__
) -> None:
threading.Thread.__init__(self, daemon=True)
self.logger = logging.getLogger(cls_name)
self.bind_port = bind_port
self.base_url = base_url
self.bind_address = get_http_bind_address() if bind_address is None else bind_address
self.endpoint = 'http://{:s}:{:s}{:s}'.format(str(self.bind_address), str(self.bind_port), str(self.base_url))
self.srv = None
self.ctx = None
self.app = Flask(__name__)
self.app.after_request(functools.partial(log_request, self.logger))
self.api = Api(self.app, prefix=self.base_url)
def add_resource(self, resource : Resource, *urls, **kwargs):
self.api.add_resource(resource, *urls, **kwargs)
def run(self):
self.srv = make_server(self.bind_address, self.bind_port, self.app, threaded=True)
self.ctx = self.app.app_context()
self.ctx.push()
self.logger.info('Listening on {:s}...'.format(str(self.endpoint)))
self.srv.serve_forever()
def shutdown(self):
self.srv.shutdown()