Feature Request: Ability to use the node:net library to talk to the container so that vendored client libraries for vendored services can be used.

[jschlesser]

It would be helpful to be able to talk to the container from the DO using the node:net library so that vendored libs can be used to talk to non http services. I understand that in general workers are very http oriented and that there is some kind of proxy that tcpPort is talking to when code like this const conn = this.ctx.container.getTcpPort(8080).connect('10.0.0.1:8080'); is run.

My particular use case is the use of the mssql lib https://www.npmjs.com/package/mssql in a Durable Object to maintain a connection pool to a database that isn't supported by hyperdrive.

And in the Dockerfile something like this cloudflared access tcp --hostname sql-tunnel.mydomain.com --url localhost:1433 --service-token-id ${CF_ACCESS_CLIENT_ID} --service-token-secret ${CF_ACCESS_CLIENT_SECRET}

In my case the container would only have to run the client end of a cloudflared tunnel into my datacenter.

However, this feature handles a general pattern of talking to a service that runs TCP sockets on the Container or tunneled to a datacenter paired with a well known and battle tested client library purpose built for the service. It could be redis or mongodb or a datawarehouse or some other crazy thing.

It would make the DO code below possible:

const sql = require('mssql');
// gets some host and port information that is only good for talking to our container
const {host,port} = this.ctx.container.getTcpPort(1433).getAddressInfo()

const config = {
    user: process.env.DB_USER ,
    password: process.env.DB_PASSWORD,
    server: host,  // Container's internal cloudflared proxy
    port: port,
    database: process.env.DB_NAME,
    options: {
        encrypt: true,
        trustServerCertificate: true,
        enableArithAbort: true,
        connectionTimeout: 30000,
        requestTimeout: 30000
    }
};
try {
    pool = await sql.connect(config);
    console.log('✅ Connected to SQL Server through Cloudflare proxy');
    return true;
} catch (err) {
    console.error('❌ Failed to connect to SQL Server:', err.message);
    return false;
}