stable/freqtrade/rpc/api_server/webserver.py

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import logging
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from ipaddress import IPv4Address
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from typing import Any, Dict
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import rapidjson
import uvicorn
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from fastapi import Depends, FastAPI
from fastapi.middleware.cors import CORSMiddleware
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from starlette.responses import JSONResponse
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from freqtrade.exceptions import OperationalException
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from freqtrade.rpc.api_server.uvicorn_threaded import UvicornServer
from freqtrade.rpc.rpc import RPC, RPCException, RPCHandler
logger = logging.getLogger(__name__)
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class FTJSONResponse(JSONResponse):
media_type = "application/json"
def render(self, content: Any) -> bytes:
"""
Use rapidjson for responses
Handles NaN and Inf / -Inf in a javascript way by default.
"""
return rapidjson.dumps(content).encode("utf-8")
class ApiServer(RPCHandler):
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__instance = None
__initialized = False
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_rpc: RPC
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_has_rpc: bool = False
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_bgtask_running: bool = False
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_config: Dict[str, Any] = {}
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def __new__(cls, *args, **kwargs):
"""
This class is a singleton.
We'll only have one instance of it around.
"""
if ApiServer.__instance is None:
ApiServer.__instance = object.__new__(cls)
ApiServer.__initialized = False
return ApiServer.__instance
def __init__(self, config: Dict[str, Any], standalone: bool = False) -> None:
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ApiServer._config = config
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if self.__initialized and (standalone or self._standalone):
return
self._standalone: bool = standalone
self._server = None
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ApiServer.__initialized = True
api_config = self._config['api_server']
self.app = FastAPI(title="Freqtrade API",
docs_url='/docs' if api_config.get('enable_openapi', False) else None,
redoc_url=None,
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default_response_class=FTJSONResponse,
)
self.configure_app(self.app, self._config)
self.start_api()
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def add_rpc_handler(self, rpc: RPC):
"""
Attach rpc handler
"""
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if not self._has_rpc:
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self._rpc = rpc
ApiServer._rpc = rpc
ApiServer._has_rpc = True
else:
# This should not happen assuming we didn't mess up.
raise OperationalException('RPC Handler already attached.')
def cleanup(self) -> None:
""" Cleanup pending module resources """
if self._server:
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logger.info("Stopping API Server")
self._server.cleanup()
def send_msg(self, msg: Dict[str, str]) -> None:
pass
def handle_rpc_exception(self, request, exc):
logger.exception(f"API Error calling: {exc}")
return JSONResponse(
status_code=502,
content={'error': f"Error querying {request.url.path}: {exc.message}"}
)
def configure_app(self, app: FastAPI, config):
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from freqtrade.rpc.api_server.api_auth import http_basic_or_jwt_token, router_login
from freqtrade.rpc.api_server.api_v1 import router as api_v1
from freqtrade.rpc.api_server.api_v1 import router_public as api_v1_public
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from freqtrade.rpc.api_server.web_ui import router_ui
app.include_router(api_v1_public, prefix="/api/v1")
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app.include_router(api_v1, prefix="/api/v1",
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dependencies=[Depends(http_basic_or_jwt_token)],
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)
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app.include_router(router_login, prefix="/api/v1", tags=["auth"])
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# UI Router MUST be last!
app.include_router(router_ui, prefix='')
app.add_middleware(
CORSMiddleware,
allow_origins=config['api_server'].get('CORS_origins', []),
allow_credentials=True,
allow_methods=["*"],
allow_headers=["*"],
)
app.add_exception_handler(RPCException, self.handle_rpc_exception)
def start_api(self):
"""
Start API ... should be run in thread.
"""
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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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if (self._config['api_server'].get('jwt_secret_key', 'super-secret')
in ('super-secret, somethingrandom')):
logger.warning("SECURITY WARNING - `jwt_secret_key` seems to be default."
"Others may be able to log into your bot.")
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logger.info('Starting Local Rest Server.')
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verbosity = self._config['api_server'].get('verbosity', 'error')
uvconfig = uvicorn.Config(self.app,
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port=rest_port,
host=rest_ip,
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use_colors=False,
log_config=None,
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access_log=True if verbosity != 'error' else False,
)
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try:
self._server = UvicornServer(uvconfig)
self._server.run_in_thread()
except Exception:
logger.exception("Api server failed to start.")