Pull jsonrpc machinery out of deribit backend into piker.data._web_bs module and make it generic
parent
c5447fda06
commit
4facd161a9
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@ -23,7 +23,6 @@ import time
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import asyncio
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from contextlib import asynccontextmanager as acm, AsyncExitStack
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from itertools import count
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from functools import partial
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from datetime import datetime
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from typing import Any, Optional, Iterable, Callable
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@ -36,7 +35,11 @@ from fuzzywuzzy import process as fuzzy
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import numpy as np
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from piker.data.types import Struct
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from piker.data._web_bs import NoBsWs, open_autorecon_ws
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from piker.data._web_bs import (
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NoBsWs,
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open_autorecon_ws,
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open_jsonrpc_session
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)
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from .._util import resproc
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@ -422,65 +425,14 @@ async def get_client(
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async with (
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trio.open_nursery() as n,
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open_autorecon_ws(_testnet_ws_url) as ws
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open_jsonrpc_session(
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_testnet_ws_url, dtype=JSONRPCResult) as json_rpc
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):
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_rpc_id: Iterable = count(0)
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_rpc_results: dict[int, dict] = {}
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_expiry_time: int = float('inf')
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_access_token: Optional[str] = None
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_refresh_token: Optional[str] = None
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async def json_rpc(method: str, params: dict) -> dict:
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"""perform a json rpc call and wait for the result, raise exception in
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case of error field present on response
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"""
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msg = {
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'jsonrpc': '2.0',
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'id': next(_rpc_id),
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'method': method,
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'params': params
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}
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_id = msg['id']
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_rpc_results[_id] = {
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'result': None,
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'event': trio.Event()
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}
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await ws.send_msg(msg)
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await _rpc_results[_id]['event'].wait()
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ret = _rpc_results[_id]['result']
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del _rpc_results[_id]
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if ret.error is not None:
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raise Exception(json.dumps(ret.error, indent=4))
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return ret
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async def _recv_task():
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"""receives every ws message and stores it in its corresponding result
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field, then sets the event to wakeup original sender tasks.
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"""
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async for msg in ws:
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msg = JSONRPCResult(**msg)
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if msg.id not in _rpc_results:
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# in case this message wasn't beign accounted for store it
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_rpc_results[msg.id] = {
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'result': None,
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'event': trio.Event()
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}
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_rpc_results[msg.id]['result'] = msg
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_rpc_results[msg.id]['event'].set()
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client = Client(json_rpc)
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_refresh_token: Optional[str] = None
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_access_token: Optional[str] = None
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async def _auth_loop(
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task_status: TaskStatus = trio.TASK_STATUS_IGNORED
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):
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@ -536,7 +488,6 @@ async def get_client(
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else:
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await trio.sleep(renew_time / 2)
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n.start_soon(_recv_task)
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# if we have client creds launch auth loop
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if client._key_id is not None:
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await n.start(_auth_loop)
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@ -19,6 +19,7 @@ ToOlS fOr CoPInG wITh "tHE wEB" protocols.
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"""
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from contextlib import asynccontextmanager, AsyncExitStack
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from itertools import count
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from types import ModuleType
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from typing import Any, Optional, Callable, AsyncGenerator
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import json
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@ -35,6 +36,8 @@ from trio_websocket._impl import (
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from ..log import get_logger
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from .types import Struct
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log = get_logger(__name__)
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@ -150,3 +153,85 @@ async def open_autorecon_ws(
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finally:
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await stack.aclose()
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'''
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JSONRPC response-request style machinery for transparent multiplexing of msgs
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over a NoBsWs.
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'''
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class JSONRPCResult(Struct):
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jsonrpc: str = '2.0'
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id: int
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result: Optional[dict] = None
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error: Optional[dict] = None
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@asynccontextmanager
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async def open_jsonrpc_session(
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url: str,
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start_id: int = 0,
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dtype: type = JSONRPCResult
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) -> Callable[[str, dict], dict]:
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async with (
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trio.open_nursery() as n,
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open_autorecon_ws(url) as ws
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):
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_rpc_id: Iterable = count(start_id)
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_rpc_results: dict[int, dict] = {}
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async def json_rpc(method: str, params: dict) -> dict:
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'''
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perform a json rpc call and wait for the result, raise exception in
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case of error field present on response
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'''
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msg = {
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'jsonrpc': '2.0',
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'id': next(_rpc_id),
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'method': method,
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'params': params
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}
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_id = msg['id']
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_rpc_results[_id] = {
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'result': None,
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'event': trio.Event()
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}
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await ws.send_msg(msg)
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await _rpc_results[_id]['event'].wait()
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ret = _rpc_results[_id]['result']
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del _rpc_results[_id]
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if ret.error is not None:
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raise Exception(json.dumps(ret.error, indent=4))
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return ret
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async def _recv_task():
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'''
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receives every ws message and stores it in its corresponding result
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field, then sets the event to wakeup original sender tasks.
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'''
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async for msg in ws:
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msg = dtype(**msg)
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if msg.id not in _rpc_results:
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# in case this message wasn't beign accounted for store it
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_rpc_results[msg.id] = {
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'result': None,
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'event': trio.Event()
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}
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_rpc_results[msg.id]['result'] = msg
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_rpc_results[msg.id]['event'].set()
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n.start_soon(_recv_task)
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yield json_rpc
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n.cancel_scope.cancel()
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