106 lines
3.9 KiB
Python
106 lines
3.9 KiB
Python
# # ⚠ Warning
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT
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# LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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# NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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# SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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#
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# [🥭 Mango Markets](https://mango.markets/) support is available at:
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# [Docs](https://docs.mango.markets/)
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# [Discord](https://discord.gg/67jySBhxrg)
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# [Twitter](https://twitter.com/mangomarkets)
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# [Github](https://github.com/blockworks-foundation)
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# [Email](mailto:hello@blockworks.foundation)
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import json
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import logging
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import rx
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import rx.subject
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import typing
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import websocket
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from threading import Thread
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from .datetimes import local_now
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# # 🥭 ReconnectingWebsocket class
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#
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# The `ReconnectingWebsocket` class wraps a websocket with an automatic-reconnection
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# mechanism. If an error disconnects the websocket, it will automatically reconnect. It
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# will continue to automatically reconnect, until it is explicitly closed.
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#
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class ReconnectingWebsocket:
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def __init__(
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self, url: str, on_open_call: typing.Callable[[websocket.WebSocketApp], None]
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) -> None:
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self._logger: logging.Logger = logging.getLogger(self.__class__.__name__)
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self.url = url
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self.on_open_call = on_open_call
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self.reconnect_required: bool = True
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self.ping_interval: int = 0
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self.connecting: rx.subject.behaviorsubject.BehaviorSubject = (
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rx.subject.behaviorsubject.BehaviorSubject(local_now())
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)
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self.disconnected: rx.subject.behaviorsubject.BehaviorSubject = (
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rx.subject.behaviorsubject.BehaviorSubject(local_now())
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)
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self.ping: rx.subject.behaviorsubject.BehaviorSubject = (
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rx.subject.behaviorsubject.BehaviorSubject(local_now())
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)
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self.pong: rx.subject.behaviorsubject.BehaviorSubject = (
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rx.subject.behaviorsubject.BehaviorSubject(local_now())
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)
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self.item: rx.subject.subject.Subject = rx.subject.subject.Subject()
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def close(self) -> None:
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self._logger.info(f"Closing WebSocket for {self.url}")
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self.reconnect_required = False
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self._ws.close()
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def force_reconnect(self) -> None:
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self._logger.info(f"Forcing a reconnect on WebSocket for {self.url}")
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self._ws.close()
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def _on_open(self, ws: websocket.WebSocketApp) -> None:
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self._logger.info(f"Opening WebSocket for {self.url}")
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if self.on_open_call:
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self.on_open_call(ws)
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def _on_message(self, _: typing.Any, message: str) -> None:
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data = json.loads(message)
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self.item.on_next(data)
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def _on_error(self, *args: typing.Any) -> None:
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self._logger.warning(f"WebSocket for {self.url} has error {args}")
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def _on_ping(self, *_: typing.Any) -> None:
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self.ping.on_next(local_now())
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def _on_pong(self, *_: typing.Any) -> None:
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self.pong.on_next(local_now())
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def open(self) -> None:
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thread = Thread(target=self._run)
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thread.start()
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def send(self, message: str) -> None:
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self._ws.send(message)
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def _run(self) -> None:
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while self.reconnect_required:
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self._logger.info(f"WebSocket connecting to: {self.url}")
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self.connecting.on_next(local_now())
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self._ws = websocket.WebSocketApp(
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self.url,
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on_open=self._on_open,
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on_message=self._on_message,
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on_error=self._on_error,
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on_ping=self._on_ping,
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on_pong=self._on_pong,
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)
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self._ws.run_forever(ping_interval=self.ping_interval)
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self.disconnected.on_next(local_now())
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