stable/freqtrade/rpc/api_server.py

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import logging
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import threading
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from datetime import date, datetime
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from ipaddress import IPv4Address
from typing import Any, Callable, Dict
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from arrow import Arrow
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from flask import Flask, jsonify, request
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from flask.json import JSONEncoder
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from flask_cors import CORS
from flask_jwt_extended import (JWTManager, create_access_token,
create_refresh_token, get_jwt_identity,
jwt_refresh_token_required,
verify_jwt_in_request_optional)
from werkzeug.security import safe_str_cmp
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from werkzeug.serving import make_server
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from freqtrade.__init__ import __version__
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from freqtrade.rpc.rpc import RPC, RPCException
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logger = logging.getLogger(__name__)
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BASE_URI = "/api/v1"
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class ArrowJSONEncoder(JSONEncoder):
def default(self, obj):
try:
if isinstance(obj, Arrow):
return obj.for_json()
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elif isinstance(obj, date):
return obj.strftime("%Y-%m-%d")
elif isinstance(obj, datetime):
return obj.strftime("%Y-%m-%d %H:%M:%S")
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iterable = iter(obj)
except TypeError:
pass
else:
return list(iterable)
return JSONEncoder.default(self, obj)
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# Type should really be Callable[[ApiServer, Any], Any], but that will create a circular dependency
def require_login(func: Callable[[Any, Any], Any]):
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def func_wrapper(obj, *args, **kwargs):
verify_jwt_in_request_optional()
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auth = request.authorization
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if get_jwt_identity() or auth and obj.check_auth(auth.username, auth.password):
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return func(obj, *args, **kwargs)
else:
return jsonify({"error": "Unauthorized"}), 401
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return func_wrapper
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# Type should really be Callable[[ApiServer], Any], but that will create a circular dependency
def rpc_catch_errors(func: Callable[[Any], Any]):
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def func_wrapper(obj, *args, **kwargs):
try:
return func(obj, *args, **kwargs)
except RPCException as e:
logger.exception("API Error calling %s: %s", func.__name__, e)
return obj.rest_error(f"Error querying {func.__name__}: {e}")
return func_wrapper
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class ApiServer(RPC):
"""
This class runs api server and provides rpc.rpc functionality to it
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This class starts a non-blocking thread the api server runs within
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"""
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def check_auth(self, username, password):
return (safe_str_cmp(username, self._config['api_server'].get('username')) and
safe_str_cmp(password, self._config['api_server'].get('password')))
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def __init__(self, freqtrade) -> None:
"""
Init the api server, and init the super class RPC
:param freqtrade: Instance of a freqtrade bot
:return: None
"""
super().__init__(freqtrade)
self._config = freqtrade.config
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self.app = Flask(__name__)
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self._cors = CORS(self.app,
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resources={r"/api/*": {
"supports_credentials": True,
"origins": self._config['api_server'].get('CORS_origins', [])}}
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)
# Setup the Flask-JWT-Extended extension
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self.app.config['JWT_SECRET_KEY'] = self._config['api_server'].get(
'jwt_secret_key', 'super-secret')
self.jwt = JWTManager(self.app)
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self.app.json_encoder = ArrowJSONEncoder
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# Register application handling
self.register_rest_rpc_urls()
thread = threading.Thread(target=self.run, daemon=True)
thread.start()
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def cleanup(self) -> None:
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logger.info("Stopping API Server")
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self.srv.shutdown()
def run(self):
"""
Method that runs flask app in its own thread forever.
Section to handle configuration and running of the Rest server
also to check and warn if not bound to a loopback, warn on security risk.
"""
rest_ip = self._config['api_server']['listen_ip_address']
rest_port = self._config['api_server']['listen_port']
logger.info(f'Starting HTTP Server at {rest_ip}:{rest_port}')
if not IPv4Address(rest_ip).is_loopback:
logger.warning("SECURITY WARNING - Local Rest Server listening to external connections")
logger.warning("SECURITY WARNING - This is insecure please set to your loopback,"
"e.g 127.0.0.1 in config.json")
if not self._config['api_server'].get('password'):
logger.warning("SECURITY WARNING - No password for local REST Server defined. "
"Please make sure that this is intentional!")
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# Run the Server
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logger.info('Starting Local Rest Server.')
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try:
self.srv = make_server(rest_ip, rest_port, self.app)
self.srv.serve_forever()
except Exception:
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logger.exception("Api server failed to start.")
logger.info('Local Rest Server started.')
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def send_msg(self, msg: Dict[str, str]) -> None:
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"""
We don't push to endpoints at the moment.
Take a look at webhooks for that functionality.
"""
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pass
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def rest_dump(self, return_value):
""" Helper function to jsonify object for a webserver """
return jsonify(return_value)
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def rest_error(self, error_msg):
return jsonify({"error": error_msg}), 502
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def register_rest_rpc_urls(self):
"""
Registers flask app URLs that are calls to functonality in rpc.rpc.
First two arguments passed are /URL and 'Label'
Label can be used as a shortcut when refactoring
:return:
"""
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self.app.register_error_handler(404, self.page_not_found)
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# Actions to control the bot
self.app.add_url_rule(f'{BASE_URI}/token/login', 'login',
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view_func=self._token_login, methods=['POST'])
self.app.add_url_rule(f'{BASE_URI}/token/refresh', 'token_refresh',
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view_func=self._token_refresh, methods=['POST'])
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self.app.add_url_rule(f'{BASE_URI}/start', 'start',
view_func=self._start, methods=['POST'])
self.app.add_url_rule(f'{BASE_URI}/stop', 'stop', view_func=self._stop, methods=['POST'])
self.app.add_url_rule(f'{BASE_URI}/stopbuy', 'stopbuy',
view_func=self._stopbuy, methods=['POST'])
self.app.add_url_rule(f'{BASE_URI}/reload_config', 'reload_config',
view_func=self._reload_config, methods=['POST'])
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# Info commands
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self.app.add_url_rule(f'{BASE_URI}/balance', 'balance',
view_func=self._balance, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/count', 'count', view_func=self._count, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/daily', 'daily', view_func=self._daily, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/edge', 'edge', view_func=self._edge, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/profit', 'profit',
view_func=self._profit, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/performance', 'performance',
view_func=self._performance, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/status', 'status',
view_func=self._status, methods=['GET'])
self.app.add_url_rule(f'{BASE_URI}/version', 'version',
view_func=self._version, methods=['GET'])
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self.app.add_url_rule(f'{BASE_URI}/show_config', 'show_config',
view_func=self._show_config, methods=['GET'])
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self.app.add_url_rule(f'{BASE_URI}/ping', 'ping',
view_func=self._ping, methods=['GET'])
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self.app.add_url_rule(f'{BASE_URI}/trades', 'trades',
view_func=self._trades, methods=['GET'])
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# Combined actions and infos
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self.app.add_url_rule(f'{BASE_URI}/blacklist', 'blacklist', view_func=self._blacklist,
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methods=['GET', 'POST'])
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self.app.add_url_rule(f'{BASE_URI}/whitelist', 'whitelist', view_func=self._whitelist,
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methods=['GET'])
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self.app.add_url_rule(f'{BASE_URI}/forcebuy', 'forcebuy',
view_func=self._forcebuy, methods=['POST'])
self.app.add_url_rule(f'{BASE_URI}/forcesell', 'forcesell', view_func=self._forcesell,
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methods=['POST'])
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# TODO: Implement the following
# help (?)
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@require_login
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def page_not_found(self, error):
"""
Return "404 not found", 404.
"""
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return self.rest_dump({
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'status': 'error',
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'reason': f"There's no API call for {request.base_url}.",
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'code': 404
}), 404
@require_login
@rpc_catch_errors
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def _token_login(self):
"""
Handler for /token/login
Returns a JWT token
"""
auth = request.authorization
if auth and self.check_auth(auth.username, auth.password):
keystuff = {'u': auth.username}
ret = {
'access_token': create_access_token(identity=keystuff),
'refresh_token': create_refresh_token(identity=keystuff),
}
return self.rest_dump(ret)
return jsonify({"error": "Unauthorized"}), 401
@jwt_refresh_token_required
@rpc_catch_errors
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def _token_refresh(self):
"""
Handler for /token/refresh
Returns a JWT token based on a JWT refresh token
"""
current_user = get_jwt_identity()
new_token = create_access_token(identity=current_user, fresh=False)
ret = {'access_token': new_token}
return self.rest_dump(ret)
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@require_login
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@rpc_catch_errors
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def _start(self):
"""
Handler for /start.
Starts TradeThread in bot if stopped.
"""
msg = self._rpc_start()
return self.rest_dump(msg)
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@require_login
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@rpc_catch_errors
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def _stop(self):
"""
Handler for /stop.
Stops TradeThread in bot if running
"""
msg = self._rpc_stop()
return self.rest_dump(msg)
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@require_login
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@rpc_catch_errors
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def _stopbuy(self):
"""
Handler for /stopbuy.
Sets max_open_trades to 0 and gracefully sells all open trades
"""
msg = self._rpc_stopbuy()
return self.rest_dump(msg)
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@rpc_catch_errors
def _ping(self):
"""
simple poing version
"""
return self.rest_dump({"status": "pong"})
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@require_login
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@rpc_catch_errors
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def _version(self):
"""
Prints the bot's version
"""
return self.rest_dump({"version": __version__})
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@require_login
@rpc_catch_errors
def _show_config(self):
"""
Prints the bot's version
"""
return self.rest_dump(self._rpc_show_config())
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@require_login
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@rpc_catch_errors
def _reload_config(self):
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"""
Handler for /reload_config.
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Triggers a config file reload
"""
msg = self._rpc_reload_config()
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return self.rest_dump(msg)
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@require_login
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@rpc_catch_errors
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def _count(self):
"""
Handler for /count.
Returns the number of trades running
"""
msg = self._rpc_count()
return self.rest_dump(msg)
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@require_login
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@rpc_catch_errors
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def _daily(self):
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"""
Returns the last X days trading stats summary.
:return: stats
"""
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timescale = request.args.get('timescale', 7)
timescale = int(timescale)
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stats = self._rpc_daily_profit(timescale,
self._config['stake_currency'],
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self._config.get('fiat_display_currency', '')
)
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return self.rest_dump(stats)
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@require_login
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@rpc_catch_errors
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def _edge(self):
"""
Returns information related to Edge.
:return: edge stats
"""
stats = self._rpc_edge()
return self.rest_dump(stats)
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@require_login
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@rpc_catch_errors
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def _profit(self):
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"""
Handler for /profit.
Returns a cumulative profit statistics
:return: stats
"""
stats = self._rpc_trade_statistics(self._config['stake_currency'],
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self._config.get('fiat_display_currency')
)
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return self.rest_dump(stats)
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@require_login
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@rpc_catch_errors
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def _performance(self):
"""
Handler for /performance.
Returns a cumulative performance statistics
:return: stats
"""
stats = self._rpc_performance()
return self.rest_dump(stats)
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@require_login
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@rpc_catch_errors
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def _status(self):
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"""
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Handler for /status.
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Returns the current status of the trades in json format
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"""
try:
results = self._rpc_trade_status()
return self.rest_dump(results)
except RPCException:
return self.rest_dump([])
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@require_login
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@rpc_catch_errors
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def _balance(self):
"""
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Handler for /balance.
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Returns the current status of the trades in json format
"""
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results = self._rpc_balance(self._config['stake_currency'],
self._config.get('fiat_display_currency', ''))
return self.rest_dump(results)
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@require_login
@rpc_catch_errors
def _trades(self):
"""
Handler for /trades.
Returns the X last trades in json format
"""
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limit = int(request.args.get('limit', 0))
results = self._rpc_trade_history(limit)
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return self.rest_dump(results)
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@require_login
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@rpc_catch_errors
def _whitelist(self):
"""
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Handler for /whitelist.
"""
results = self._rpc_whitelist()
return self.rest_dump(results)
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@require_login
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@rpc_catch_errors
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def _blacklist(self):
"""
Handler for /blacklist.
"""
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add = request.json.get("blacklist", None) if request.method == 'POST' else None
results = self._rpc_blacklist(add)
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return self.rest_dump(results)
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@require_login
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@rpc_catch_errors
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def _forcebuy(self):
"""
Handler for /forcebuy.
"""
asset = request.json.get("pair")
price = request.json.get("price", None)
trade = self._rpc_forcebuy(asset, price)
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if trade:
return self.rest_dump(trade.to_json())
else:
return self.rest_dump({"status": f"Error buying pair {asset}."})
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@require_login
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@rpc_catch_errors
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def _forcesell(self):
"""
Handler for /forcesell.
"""
tradeid = request.json.get("tradeid")
results = self._rpc_forcesell(tradeid)
return self.rest_dump(results)