Simple self-hosted WebWormhole.io using docker-compose

Note: This config is currently missing a TURN server, so it won’t work if the clients can’t reach each other! I am working on this.

WebWormhole.io is a new service similar to and inspired by magic-wormhole that allows easily sharing files between browsers without the need to install a software. Internally, it uses WebRTC, allowing direct transfer of files between computers even through firewalls.

While there is no official Docker image published on Docker Hub, the WebWormhole GitHub project provides an official Dockerfile. Based on this, I have published ulikoehler/webwormhole which has been built using

git clone https://github.com/saljam/webwormhole.git
cd webwormhole
docker build -t ulikoehler/webwormhole:latest .
docker push ulikoehler/webwormhole:latest

This is the docker-compose.yml that you can use to run WebWormhole behind a reverse proxy:

version: '3'
services:
  webwormhole:
    image: 'ulikoehler/webwormhole:latest'
    entrypoint: ["/bin/ww", "server", "-http=localhost:52618", "-https="]
    network_mode: host

and this is my nginx config:

server {
    server_name  webwormhole.mydomain.com;

    access_log off;
    error_log /var/log/nginx/webwormhole.mydomain.com.error.log;

    location / {
        proxy_pass http://localhost:52618/;
        proxy_http_version 1.1;
        proxy_set_header Upgrade $http_upgrade;
        proxy_set_header Connection "Upgrade";
        proxy_redirect default;
    }

    listen 443 ssl; # managed by Certbot
    ssl_certificate /etc/letsencrypt/live/webwormhole.mydomain.com/fullchain.pem; # managed by Certbot
    ssl_certificate_key /etc/letsencrypt/live/webwormhole.mydomain.com/privkey.pem; # managed by Certbot
    include /etc/letsencrypt/options-ssl-nginx.conf; # managed by Certbot
    #ssl_dhparam /etc/letsencrypt/ssl-dhparams.pem; # managed by Certbot
}
server {
    if ($host = webwormhole.mydomain.com) {
        return 301 https://$host$request_uri;
    }

    server_name webwormhole.mydomain.com;

    listen 80;
    return 404; # managed by Certbot
}

I storeĀ docker-compose.yml inĀ /var/lib/webwormhole.mydomain.com and I used the script from our previous post Create a systemd service for your docker-compose project in 10 seconds in order to create this systemd config file in /etc/systemd/system/webwormhole.mydomain.com.service:

[Unit]
Description=webwormhole.mydomain.com
Requires=docker.service
After=docker.service

[Service]
Restart=always
User=root
Group=docker
WorkingDirectory=/var/lib/webwormhole.mydomain.com
# Shutdown container (if running) when unit is started
ExecStartPre=/usr/local/bin/docker-compose -f docker-compose.yml down
# Start container when unit is started
ExecStart=/usr/local/bin/docker-compose -f docker-compose.yml up
# Stop container when unit is stopped
ExecStop=/usr/local/bin/docker-compose -f docker-compose.yml down

[Install]
WantedBy=multi-user.target

which you can start and enable using

sudo systemctl enable webwormhole.mydomain.com
sudo systemctl start webwormhole.mydomain.com