Init

.github/workflows/build_docker_image.yml

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+name: Build docker image
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  Build-Docker-Image:
+    runs-on: ubuntu-latest
+    steps:
+      -
+        name: Checkout
+        uses: actions/checkout@v2
+      
+      -
+        name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v1
+
+      - id: repository_name
+        uses: ASzc/change-string-case-action@v1
+        with:
+          string: ${{ github.repository }}
+
+      -
+        name: Login to ghcr.io
+        uses: docker/login-action@v1 
+        with:
+          registry: ghcr.io
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
+
+      -
+        name: Build and push
+        id: docker_build
+        uses: docker/build-push-action@v2
+        env:
+          IMAGE: ${{ steps.repository_name.outputs.lowercase }}
+        with:
+          push: true
+          tags: ghcr.io/${{ env.IMAGE }}:latest
+          context: .
+          file: ./docker/production.dockerfile
+
+      - 
+        name: Invoke deployment hook
+        uses: joelwmale/webhook-action@master
+        with:
+          url: ${{ secrets.WEBHOOK_URL }}

.gitignore

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+venv

app/main.py

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+import uuid
+import asyncio
+import os
+
+from fastapi import FastAPI, APIRouter, File, UploadFile, Form, HTTPException, BackgroundTasks, status
+from fastapi.responses import FileResponse
+from starlette.background import BackgroundTask
+
+import aiofiles
+
+
+router = APIRouter(
+    tags=["converter"]
+)
+
+
+@router.post("/")
+async def convert(background_tasks: BackgroundTasks, file: UploadFile = File({}), format: str = Form({})):
+    temp_uuid = uuid.uuid1()
+
+    temp_filename = str(temp_uuid) + '.fb2'
+    converted_temp_filename = str(temp_uuid) + '.' + format
+
+    async with aiofiles.open(temp_filename, 'wb') as f:
+        content = await file.read()
+
+        if isinstance(content, str):
+            content = content.encode()
+
+        await f.write(content)
+
+    proc = await asyncio.create_subprocess_exec(
+        './bin/fb2c', 'convert', '--to', format, temp_filename,
+        stdout=asyncio.subprocess.PIPE,
+        stderr=asyncio.subprocess.PIPE
+    )
+
+    await proc.communicate()
+
+    background_tasks.add_task(os.remove, temp_filename)
+
+    if proc.returncode != 0:
+        return HTTPException(status_code=status.HTTP_400_BAD_REQUEST, detail="Can't convert!")
+
+    return FileResponse(
+        converted_temp_filename,
+        background=BackgroundTask(lambda: os.remove(converted_temp_filename))
+    )
+
+
+app = FastAPI()
+
+app.include_router(router)

docker/build.dockerfile

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+FROM python:3.10-slim as build-image
+
+RUN apt-get update \
+    && apt-get install --no-install-recommends -y unzip \
+    && rm -rf /var/lib/apt/lists/*
+
+# Get converter bin
+WORKDIR  /root/fb2converter
+ADD https://github.com/rupor-github/fb2converter/releases/download/v1.59.0/fb2c_linux_amd64.zip ./
+RUN unzip fb2c_linux_amd64.zip
+
+# Install requirements
+WORKDIR /root/temp
+ENV VENV_PATH=/opt/venv
+COPY ./requirements.txt ./
+RUN python -m venv $VENV_PATH \
+    && . /opt/venv/bin/activate \
+    && pip install -r requirements.txt --no-cache-dir
+
+
+FROM python:3.10-slim as runtime-image
+
+WORKDIR /app
+
+COPY ./app/ ./
+
+ENV VENV_PATH=/opt/venv
+ENV PATH="$VENV_PATH/bin:$PATH"
+
+COPY --from=build-image /root/fb2converter/ /app/bin/
+COPY --from=build-image $VENV_PATH $VENV_PATH
+
+EXPOSE 8080
+
+CMD uvicorn main:app --host="0.0.0.0" --port="8080"

requirements.txt

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+fastapi
+python-multipart
+aiofiles
+uvicorn