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| /dist/ | ||
| /.pytest_cache/ | ||
| tests/test-results.xml | ||
| *.egg-info/ | ||
| *.egg-info/ | ||
| __pycache__ | ||
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| # NEON AI (TM) SOFTWARE, Software Development Kit & Application Framework | ||
| # All trademark and other rights reserved by their respective owners | ||
| # Copyright 2008-2022 Neongecko.com Inc. | ||
| # Contributors: Daniel McKnight, Guy Daniels, Elon Gasper, Richard Leeds, | ||
| # Regina Bloomstine, Casimiro Ferreira, Andrii Pernatii, Kirill Hrymailo | ||
| # BSD-3 License | ||
| # Redistribution and use in source and binary forms, with or without | ||
| # modification, are permitted provided that the following conditions are met: | ||
| # 1. Redistributions of source code must retain the above copyright notice, | ||
| # this list of conditions and the following disclaimer. | ||
| # 2. Redistributions in binary form must reproduce the above copyright notice, | ||
| # this list of conditions and the following disclaimer in the documentation | ||
| # and/or other materials provided with the distribution. | ||
| # 3. Neither the name of the copyright holder nor the names of its | ||
| # contributors may be used to endorse or promote products derived from this | ||
| # software without specific prior written permission. | ||
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" | ||
| # AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, | ||
| # THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR | ||
| # PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR | ||
| # CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
| # EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
| # PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, | ||
| # OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
| # LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
| # NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
| # SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
|
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| import requests | ||
| import json | ||
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| from os import makedirs | ||
| from os.path import join, isfile, isdir, dirname | ||
| from time import time | ||
| from ovos_utils.log import LOG | ||
| from ovos_utils.xdg_utils import xdg_cache_home | ||
|
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| _DEFAULT_BACKEND_URL = "https://hana.neonaiservices.com" | ||
| _client_config = {} | ||
| _headers = {} | ||
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| def _get_client_config_path(url: str = _DEFAULT_BACKEND_URL): | ||
| url_key = hash(url) | ||
| return join(xdg_cache_home(), "neon", f"hana_token_{url_key}.json") | ||
|
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| class ServerException(Exception): | ||
| """Exception class representing a backend server communication error""" | ||
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| def _init_client(backend_address: str): | ||
| """ | ||
| Initialize request headers for making backend requests. If a local cache is | ||
| available it will be used, otherwise an auth request will be made to the | ||
| specified backend server | ||
| @param backend_address: Hana server URL to connect to | ||
| """ | ||
| global _client_config | ||
| global _headers | ||
|
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| if not _client_config: | ||
| client_config_path = _get_client_config_path(backend_address) | ||
| if isfile(client_config_path): | ||
| with open(client_config_path) as f: | ||
| _client_config = json.load(f) | ||
| else: | ||
| _get_token(backend_address) | ||
|
|
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| if not _headers: | ||
| _headers = {"Authorization": f"Bearer {_client_config['access_token']}"} | ||
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| def _get_token(backend_address: str, username: str = "guest", | ||
| password: str = "password"): | ||
| """ | ||
| Get new auth tokens from the specified server. This will cache the returned | ||
| token, overwriting any previous data at the cache path. | ||
| @param backend_address: Hana server URL to connect to | ||
| @param username: Username to authorize | ||
| @param password: Password for specified username | ||
| """ | ||
| global _client_config | ||
| # TODO: username/password from configuration | ||
| resp = requests.post(f"{backend_address}/auth/login", | ||
| json={"username": username, | ||
| "password": password}) | ||
| if not resp.ok: | ||
| raise ServerException(f"Error logging into {backend_address}. " | ||
| f"{resp.status_code}: {resp.text}") | ||
| _client_config = resp.json() | ||
| client_config_path = _get_client_config_path(backend_address) | ||
| if not isdir(dirname(client_config_path)): | ||
| makedirs(dirname(client_config_path)) | ||
| with open(client_config_path, "w+") as f: | ||
| json.dump(_client_config, f, indent=2) | ||
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| def _refresh_token(backend_address: str): | ||
| """ | ||
| Get new tokens from the specified server using an existing refresh token | ||
| (if it exists). This will update the cached tokens and associated metadata. | ||
| @param backend_address: Hana server URL to connect to | ||
| """ | ||
| global _client_config | ||
| _init_client(backend_address) | ||
| update = requests.post(f"{backend_address}/auth/refresh", json={ | ||
| "access_token": _client_config.get("access_token"), | ||
| "refresh_token": _client_config.get("refresh_token"), | ||
| "client_id": _client_config.get("client_id")}) | ||
| if not update.ok: | ||
| raise ServerException(f"Error updating token from {backend_address}. " | ||
| f"{update.status_code}: {update.text}") | ||
| _client_config = update.json() | ||
| client_config_path = _get_client_config_path(backend_address) | ||
| with open(client_config_path, "w+") as f: | ||
| json.dump(_client_config, f, indent=2) | ||
|
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| def request_backend(endpoint: str, request_data: dict, | ||
| server_url: str = _DEFAULT_BACKEND_URL) -> dict: | ||
| """ | ||
| Make a request to a Hana backend server and return the json response | ||
| @param endpoint: server endpoint to query | ||
| @param request_data: dict data to send in request body | ||
| @param server_url: Base URL of Hana server to query | ||
| @returns: dict response | ||
| """ | ||
| _init_client(server_url) | ||
| if time() >= _client_config.get("expiration", 0): | ||
| try: | ||
| _refresh_token(server_url) | ||
| except ServerException as e: | ||
| LOG.error(e) | ||
| _get_token(server_url) | ||
| resp = requests.post(f"{server_url}/{endpoint.lstrip('/')}", | ||
| json=request_data, headers=_headers) | ||
| if resp.ok: | ||
| return resp.json() | ||
| else: | ||
| raise ServerException(f"Error response {resp.status_code}: {resp.text}") |
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