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#!/usr/bin/env python3
import json
import os
import sys
import traceback
import urllib.request
import flask_socketio
from dotenv import load_dotenv
from flask import Flask, request, jsonify
from flask_compress import Compress
from flask_cors import CORS
from oauth2client import client, crypt
from opendc.models.user import User
from opendc.util import rest, path_parser, database
from opendc.util.exceptions import AuthorizationTokenError, RequestInitializationError
from opendc.util.json import JSONEncoder
load_dotenv()
TEST_MODE = "OPENDC_FLASK_TESTING" in os.environ
# Setup Sentry if DSN is specified
if 'SENTRY_DSN' in os.environ:
import sentry_sdk
from sentry_sdk.integrations.flask import FlaskIntegration
sentry_sdk.init(
integrations=[FlaskIntegration()],
traces_sample_rate=0.1
)
# Set up database if not testing
if not TEST_MODE:
database.DB.initialize_database(
user=os.environ['OPENDC_DB_USERNAME'],
password=os.environ['OPENDC_DB_PASSWORD'],
database=os.environ['OPENDC_DB'],
host=os.environ.get('OPENDC_DB_HOST', 'localhost'))
# Set up the core app
FLASK_CORE_APP = Flask(__name__)
FLASK_CORE_APP.testing = TEST_MODE
FLASK_CORE_APP.config['SECRET_KEY'] = os.environ['OPENDC_FLASK_SECRET']
FLASK_CORE_APP.json_encoder = JSONEncoder
# Set up CORS support
CORS(FLASK_CORE_APP)
compress = Compress()
compress.init_app(FLASK_CORE_APP)
SOCKET_IO_CORE = flask_socketio.SocketIO(FLASK_CORE_APP, cors_allowed_origins="*")
API_VERSIONS = {'v2'}
@FLASK_CORE_APP.route('/tokensignin', methods=['POST'])
def sign_in():
"""Authenticate a user with Google sign in"""
try:
token = request.form['idtoken']
except KeyError:
return 'No idtoken provided', 401
try:
idinfo = client.verify_id_token(token, os.environ['OPENDC_OAUTH_CLIENT_ID'])
if idinfo['aud'] != os.environ['OPENDC_OAUTH_CLIENT_ID']:
raise crypt.AppIdentityError('Unrecognized client.')
if idinfo['iss'] not in ['accounts.google.com', 'https://accounts.google.com']:
raise crypt.AppIdentityError('Wrong issuer.')
except ValueError:
url = "https://www.googleapis.com/oauth2/v3/tokeninfo?id_token={}".format(token)
req = urllib.request.Request(url)
response = urllib.request.urlopen(url=req, timeout=30)
res = response.read()
idinfo = json.loads(res)
except crypt.AppIdentityError as e:
return 'Did not successfully authenticate'
user = User.from_google_id(idinfo['sub'])
data = {'isNewUser': user.obj is None}
if user.obj is not None:
data['userId'] = user.get_id()
return jsonify(**data)
@FLASK_CORE_APP.route('/<string:version>/<path:endpoint_path>', methods=['GET', 'POST', 'PUT', 'DELETE'])
def api_call(version, endpoint_path):
"""Call an API endpoint directly over HTTP."""
# Check whether given version is valid
if version not in API_VERSIONS:
return jsonify(error='API version not found'), 404
# Get path and parameters
(path, path_parameters) = path_parser.parse(version, endpoint_path)
query_parameters = request.args.to_dict()
for param in query_parameters:
try:
query_parameters[param] = int(query_parameters[param])
except:
pass
try:
body_parameters = json.loads(request.get_data())
except:
body_parameters = {}
# Create and call request
(req, response) = _process_message({
'id': 0,
'method': request.method,
'parameters': {
'body': body_parameters,
'path': path_parameters,
'query': query_parameters
},
'path': path,
'token': request.headers.get('auth-token')
})
print(
f'HTTP:\t{req.method} to `/{req.path}` resulted in {response.status["code"]}: {response.status["description"]}')
sys.stdout.flush()
flask_response = jsonify(json.loads(response.to_JSON()))
flask_response.status_code = response.status['code']
return flask_response
@SOCKET_IO_CORE.on('request')
def receive_message(message):
""""Receive a SocketIO request"""
(req, res) = _process_message(message)
print(f'Socket: {req.method} to `/{req.path}` resulted in {res.status["code"]}: {res.status["description"]}')
sys.stdout.flush()
flask_socketio.emit('response', res.to_JSON(), json=True)
def _process_message(message):
"""Process a request message and return the response."""
try:
req = rest.Request(message)
res = req.process()
return req, res
except AuthorizationTokenError:
res = rest.Response(401, 'Authorization error')
res.id = message['id']
except RequestInitializationError as e:
res = rest.Response(400, str(e))
res.id = message['id']
if not 'method' in message:
message['method'] = 'UNSPECIFIED'
if not 'path' in message:
message['path'] = 'UNSPECIFIED'
except Exception:
res = rest.Response(500, 'Internal server error')
if 'id' in message:
res.id = message['id']
traceback.print_exc()
req = rest.Request()
req.method = message['method']
req.path = message['path']
return req, res
if __name__ == '__main__':
print("Web server started on 8081")
SOCKET_IO_CORE.run(FLASK_CORE_APP, host='0.0.0.0', port=8081, use_reloader=False)
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