Streaming between containers with Docker Compose

Docker Engine Compose
1

I am attempting to use docker compose on an open source project to containerize my python API, a nextjs web app, and a pgvector database. I am able to run docker compose, my images build, and the web app seems to interface with the API container for all of my requests except text/event-streams.

I believe that my API can handle this—when I connect my web app locally to the API docker image, it processes these streaming events without issue—but when I try to make the request from my web app image it fails with the following network response and no indication that the response was sent to the API.

{
    "error": "Error fetching data",
    "message": "Network Error",
    "stack": "AxiosError: Network Error\n    at fetch (/app/.next/server/pages/api/rag-completion.js:24:89961)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)\n    at async e8.request (/app/.next/server/pages/api/rag-completion.js:24:92487)\n    at e8.request (/app/.next/server/pages/api/rag-completion.js:24:92580)\n    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)"
}

This leads me to believe that there might be an issue with how I define the network in my Docker Compose file, however I’ve not been able to pin down any specific reason why streaming wouldn’t be supported. Most references to this are from ~2017, and seem to be unresolved.

My compose.yaml is as follows:

networks:
  r2r-network:
    driver: bridge

services:
  r2r:
    image: emrgntcmplxty/r2r:main
    ports:
      - "8000:8000"
    environment:
      - OPENAI_API_KEY=${OPENAI_API_KEY}
      - POSTGRES_USER=${POSTGRES_USER:-postgres}
      - POSTGRES_PASSWORD=${POSTGRES_PASSWORD:-postgres}
      - POSTGRES_HOST=postgres
      - POSTGRES_PORT=5432
      - POSTGRES_DBNAME=${POSTGRES_DBNAME:-postgres}
    depends_on:
      - postgres
    networks:
      - r2r-network
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost:8000/health"]
      interval: 10s
      timeout: 5s
      retries: 5


  r2r-dashboard:
    image: emrgntcmplxty/r2r-dashboard:latest
    ports:
      - "3000:3000"
    depends_on:
      - r2r
    networks:
      - r2r-network

  postgres:
    image: pgvector/pgvector:pg16
    environment:
      POSTGRES_USER: ${POSTGRES_USER:-postgres}
      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD:-postgres}
      POSTGRES_DB: ${POSTGRES_DBNAME:-postgres}
    ports:
      - "5432:5432"
    volumes:
      - postgres_data:/var/lib/postgresql/data
    networks:
      - r2r-network

volumes:
  postgres_data:

And if it is helpful to see the Dockerfiles, they can be found here:

Does anyone have experience with streaming issues between containers in Docker Compose? Are there any specific configurations or settings I should look into to resolve this issue? I greatly appreciate any insights!