Fix DeprecationWarning on Python 3.10+

This is still compatible with Python 3.7+

.github/workflows/docker.yml

@@ -0,0 +1,43 @@
+name: Create and publish Docker images for tagged versions
+
+on:
+  push:
+    tags:
+      - 'v*'
+
+env:
+  REGISTRY: ghcr.io
+  IMAGE_NAME: ${{ github.repository }}
+
+jobs:
+  build-docker-image:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+      packages: write
+
+    steps:
+      - name: Check out repository
+        uses: actions/checkout@v3
+
+      - name: Log into GHCR
+        if: github.event_name != 'pull_request'
+        uses: docker/login-action@v2
+        with:
+          registry: ${{ env.REGISTRY }}
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      - name: Extract Docker metadata
+        id: meta
+        uses: docker/metadata-action@v4
+        with:
+          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
+
+      - name: Build and push Docker image
+        uses: docker/build-push-action@v3
+        with:
+          context: .
+          push: ${{ github.event_name != 'pull_request' }}
+          tags: ${{ steps.meta.outputs.tags }}
+          labels: ${{ steps.meta.output.labels }}

Dockerfile

@@ -1,5 +1,18 @@
-FROM docker.io/library/python:3-alpine
+FROM python:3-slim
+
+LABEL org.opencontainers.image.description='Unwebsockify is a TCP to WebSocket proxy/bridge -- like a reverse websockify.' \
+      org.opencontainers.image.source='https://github.com/jimparis/unwebsockify' \
+      org.opencontainers.image.licenses='MIT'
+
+ENV PYTHONDONTWRITEBYTECODE=1 \
+    PYTHONFAULTHANDLER=1 \
+    PYTHONHASHSEED=random \
+    PYTHONUNBUFFERED=1
+
 WORKDIR /usr/src/app
-RUN pip install --no-cache-dir websockets
-COPY unwebsockify.py ./
-ENTRYPOINT [ "python", "-u", "./unwebsockify.py" ]
+
+COPY requirements.txt .
+RUN pip install --no-cache-dir -r requirements.txt
+
+COPY unwebsockify.py .
+ENTRYPOINT [ "python", "./unwebsockify.py" ]

unwebsockify.py

@@ -48,7 +48,7 @@ class Proxy:
     async def handle_client(self, r, w):
         peer = w.get_extra_info("peername")
         print(f'{peer} connected')
-        loop = asyncio.get_event_loop()
+        loop = asyncio.get_running_loop()
         try:
             async with websockets.connect(
                     self.url, subprotocols=self.subproto) as ws:
@@ -96,7 +96,8 @@ def main(argv):
 
     args = parser.parse_args()
 
-    loop = asyncio.get_event_loop()
+    loop = asyncio.new_event_loop()
+    asyncio.set_event_loop(loop)
     proxy = Proxy(args.port, args.listen, args.url, args.subproto)
     loop.run_until_complete(proxy.start())
     loop.run_forever()