# Copyright (c) Microsoft Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import asyncio
from typing import Dict, Optional, cast
from pyee.asyncio import AsyncIOEventEmitter
from playwright._impl._connection import Channel
from playwright._impl._errors import TargetClosedError
from playwright._impl._helper import Error, ParsedMessagePayload
from playwright._impl._transport import Transport
class JsonPipeTransport(AsyncIOEventEmitter, Transport):
def __init__(
self,
loop: asyncio.AbstractEventLoop,
pipe_channel: Channel,
) -> None:
super().__init__(loop)
Transport.__init__(self, loop)
self._stop_requested = False
self._pipe_channel = pipe_channel
def request_stop(self) -> None:
self._stop_requested = True
self._pipe_channel.send_no_reply("close", {})
def dispose(self) -> None:
self.on_error_future.cancel()
self._stopped_future.cancel()
async def wait_until_stopped(self) -> None:
await self._stopped_future
async def connect(self) -> None:
self._stopped_future: asyncio.Future = asyncio.Future()
def handle_message(message: Dict) -> None:
if self._stop_requested:
return
self.on_message(cast(ParsedMessagePayload, message))
def handle_closed(reason: Optional[str]) -> None:
self.emit("close", reason)
if reason:
self.on_error_future.set_exception(TargetClosedError(reason))
self._stopped_future.set_result(None)
self._pipe_channel.on(
"message",
lambda params: handle_message(params["message"]),
)
self._pipe_channel.on(
"closed",
lambda params: handle_closed(params.get("reason")),
)
async def run(self) -> None:
await self._stopped_future
def send(self, message: Dict) -> None:
if self._stop_requested:
raise Error("Playwright connection closed")
self._pipe_channel.send_no_reply("send", {"message": message})