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# coding: utf8
import config
from flask import Flask
from flask import request
from flask import render_template
from flask import send_from_directory
from flask import redirect
from flask import jsonify
from flask import has_request_context
import sys
import os
import requests
import urllib
import json
import random
import string
from time import time
import importlib
import logging
import traceback
last_code = None
last_code_user = None
last_code_time = None
# Path to device plugins
sys.path.insert(0, config.DEVICES_DIRECTORY)
# Logging
logger = logging.getLogger()
old_factory = logging.getLogRecordFactory()
def record_factory(*args, **kwargs):
record = old_factory(*args, **kwargs)
record.remote_addr = '-'
record.user = '-'
if has_request_context():
record.remote_addr = request.remote_addr
if hasattr(request, 'user_id'):
record.user = request.user_id
return record
logging.setLogRecordFactory(record_factory)
log_handler = logging.FileHandler(config.LOG_FILE, 'a') if hasattr(config, 'LOG_FILE') else StreamHandler()
log_handler.setFormatter(
logging.Formatter(
fmt=config.LOG_FORMAT if hasattr(config, 'LOG_FORMAT') else "[%(asctime)s] [%(levelname)s] [%(remote_addr)s] [%(user)s]: %(message)s",
datefmt=config.LOG_DATE_FORMAT if hasattr(config, 'LOG_DATE_FORMAT') else "%Y-%m-%d %H:%M:%S",
)
)
logger.addHandler(log_handler)
if hasattr(config, 'LOG_LEVEL'): logger.setLevel(config.LOG_LEVEL)
app = Flask(__name__)
logger.info("Started.")
# Function to load user info
def get_user(user_id):
request.user_id = user_id
filename = os.path.join(config.USERS_DIRECTORY, user_id + ".json")
if os.path.isfile(filename) and os.access(filename, os.R_OK):
with open(filename, mode='r') as f:
text = f.read()
data = json.loads(text)
return data
else:
logger.warning(f"user not found")
return None
# Function to retrieve token from header
def get_token():
auth = request.headers.get('Authorization')
parts = auth.split(' ', 2)
if len(parts) == 2 and parts[0].lower() == 'bearer':
return parts[1]
else:
logger.warning(f"invalid token: {auth}")
return None
# Function to check current token, returns username
def check_token():
access_token = get_token()
access_token_file = os.path.join(config.TOKENS_DIRECTORY, access_token)
if os.path.isfile(access_token_file) and os.access(access_token_file, os.R_OK):
with open(access_token_file, mode='r') as f:
user_id = f.read()
request.user_id = user_id
return user_id
else:
return None
# Function to load device info
def get_device(device_id):
filename = os.path.join(config.DEVICES_DIRECTORY, device_id + ".json")
if os.path.isfile(filename) and os.access(filename, os.R_OK):
with open(filename, mode='r') as f:
text = f.read()
data = json.loads(text)
data['id'] = device_id
return data
else:
return None
# Random string generator
def random_string(stringLength=8):
chars = string.ascii_letters + string.digits
return ''.join(random.choice(chars) for i in range(stringLength))
@app.route('/css/<path:path>')
def send_css(path):
return send_from_directory('css', path)
# OAuth entry point
@app.route('/auth/', methods=['GET', 'POST'])
def auth():
try:
global last_code, last_code_user, last_code_time
if request.method == 'GET':
# Ask user for login and password
return render_template('login.html')
elif request.method == 'POST':
if ("username" not in request.form
or "password" not in request.form
or "state" not in request.args
or "response_type" not in request.args
or request.args["response_type"] != "code"
or "client_id" not in request.args
or request.args["client_id"] != config.CLIENT_ID):
if "username" in request.form:
request.user_id = request.form['username']
logger.error("invalid auth request")
return "Invalid request", 400
# Check login and password
user = get_user(request.form["username"])
if user == None or user["password"] != request.form["password"]:
logger.warning("invalid password")
return render_template('login.html', login_failed=True)
# Generate random code and remember this user and time
last_code = random_string(8)
last_code_user = request.form["username"]
last_code_time = time()
params = {'state': request.args['state'],
'code': last_code,
'client_id': config.CLIENT_ID}
logger.info("code generated")
return redirect(request.args["redirect_uri"] + '?' + urllib.parse.urlencode(params))
except:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
# OAuth, token request
@app.route('/token/', methods=['POST'])
def token():
try:
global last_code, last_code_user, last_code_time
request.user_id = last_code_user
if ("client_secret" not in request.form
or request.form["client_secret"] != config.CLIENT_SECRET
or "client_id" not in request.form
or request.form["client_id"] != config.CLIENT_ID
or "code" not in request.form):
logger.error("invalid token request")
return "Invalid request", 400
# Check code
if request.form["code"] != last_code:
logger.warning("invalid code")
return "Invalid code", 403
# Check time
if time() - last_code_time > 10:
logger.warning("code is too old")
return "Code is too old", 403
# Generate and save random token with username
access_token = random_string(32)
access_token_file = os.path.join(config.TOKENS_DIRECTORY, access_token)
with open(access_token_file, mode='wb') as f:
f.write(last_code_user.encode('utf-8'))
logger.info("access granted")
# Return just token without any expiration time
return jsonify({'access_token': access_token})
except:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
# Just placeholder for root
@app.route('/')
def root():
return "Your smart home is ready."
# Script must response 200 OK on this request
@app.route('/v1.0', methods=['GET', 'POST'])
def main_v10():
return "OK"
# Method to revoke token
@app.route('/v1.0/user/unlink', methods=['POST'])
def unlink():
try:
user_id = check_token()
access_token = get_token()
request_id = request.headers.get('X-Request-Id')
access_token_file = os.path.join(config.TOKENS_DIRECTORY, access_token)
if os.path.isfile(access_token_file) and os.access(access_token_file, os.R_OK):
os.remove(access_token_file)
logger.info(f"token {access_token} revoked", access_token)
return jsonify({'request_id': request_id})
except:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
# Devices list
@app.route('/v1.0/user/devices', methods=['GET'])
def devices_list():
try:
user_id = check_token()
if user_id == None:
return "Access denied", 403
request_id = request.headers.get('X-Request-Id')
logger.debug(f"devices request #{request_id}")
# Load user info
user = get_user(user_id)
devices = []
# Load config for each device available for this user
for device_id in user["devices"]:
device = get_device(device_id)
devices.append(device)
result = {'request_id': request_id, 'payload': {'user_id': user_id, 'devices': devices}}
logger.debug(f"devices response #{request_id}: \r\n{json.dumps(result, indent=4)}")
return jsonify(result)
except Exception as ex:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
# Method to query current device status
@app.route('/v1.0/user/devices/query', methods=['POST'])
def query():
try:
user_id = check_token()
if user_id == None:
return "Access denied", 403
request_id = request.headers.get('X-Request-Id')
user = get_user(user_id)
r = request.get_json()
logger.debug(f"query request #{request_id}: \r\n{json.dumps(r, indent=4)}")
devices_request = r["devices"]
result = {'request_id': request_id, 'payload': {'devices': []}}
# For each requested device...
for device in devices_request:
# Check that user can access this device
if not device["id"] in user["devices"]:
return "Access denied", 403
new_device = {'id': device['id'], 'capabilities': []}
# Load device config
device_info = get_device(device['id'])
# Load device module
device_module = importlib.import_module(device['id'])
# Get query method
query_method = getattr(device_module, "query", None)
if not query_method: query_method = getattr(device_module, device['id'] + "_query", None)
if not query_method: raise NotImplementedError(f"Neither \"query\" nor \"{device['id'] + '_query'}\" method was found in {device['id']} module")
# Call it for every requested capability
for capability in device_info['capabilities']:
# But skip it if it's not retrievable
if not capability.get("retrievable", True): continue
# Pass parameters: capability type and instance (if any)
capability_type = capability['type']
parameters = capability.get("parameters", None)
instance = parameters.get("instance", None) if parameters != None else None
r = query_method(capability_type, instance)
if type(r) == tuple:
value, instance = r
else:
value = r
if not instance: logger.error(f"'instance' is empty for device {device['id']}, please set it in the JSON file or in the query method")
new_device['capabilities'].append({
'type': capability_type,
'state': {
"instance": instance,
"value": value
}
})
result['payload']['devices'].append(new_device)
logger.debug(f"query response #{request_id}: \r\n{json.dumps(result, indent=4)}")
return jsonify(result)
except Exception as ex:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
# Method to execute some action with devices
@app.route('/v1.0/user/devices/action', methods=['POST'])
def action():
try:
user_id = check_token()
if user_id == None:
return "Access denied", 403
request_id = request.headers.get('X-Request-Id')
user = get_user(user_id)
r = request.get_json()
logger.debug(f"action request #{request_id}: \r\n{json.dumps(r, indent=4)}")
devices_request = r["payload"]["devices"]
result = {'request_id': request_id, 'payload': {'devices': []}}
# For each requested device...
for device in devices_request:
# Check that user can access this device
if not device["id"] in user["devices"]:
return "Access denied", 403
new_device = {'id': device['id'], 'capabilities': []}
# Load device module
device_module = importlib.import_module(device['id'])
# Get action method
action_method = getattr(device_module, "action", None)
if not action_method: action_method = getattr(device_module, device['id'] + "_action", None)
if not action_method: raise NotImplementedError(f"Neither \"action\" nor \"{device['id'] + '_action'}\" method was found in {device['id']} module")
# Call it for every requested capability
for capability in device['capabilities']:
# Pass parameters: capability type, instance, new value and relative parameter (if any)
capability_type = capability['type']
state = capability['state']
instance = state.get("instance", None)
value = state.get("value", None)
relative = state.get("relative", False)
try:
new_device['capabilities'].append({
'type': capability['type'],
'state': {
"instance": instance,
"action_result": {
"status": action_method(capability_type, instance, value, relative)
}
}
})
except Exception as ex:
logger.error(traceback.format_exc())
new_device['capabilities'].append({
'type': capability['type'],
'state': {
"instance": instance,
"action_result": {
"status": "ERROR",
"error_code": "INTERNAL_ERROR",
"error_message": f"{type(ex).__name__}: {str(ex)}"
}
}
})
result['payload']['devices'].append(new_device)
logger.debug(f"action response #{request_id}: \r\n{json.dumps(result, indent=4)}")
return jsonify(result)
except Exception as ex:
logger.error(traceback.format_exc())
return f"Error {type(ex).__name__}: {str(ex)}", 500
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