Wrong typings for connection address in http request

[PatrykMiszczak]

Steps to reproduce

For the example code:

import { serve } from "https://deno.land/std@0.50.0/http/server.ts";

const server = serve({ port: 8000 });

console.log("Started");

for await (const req of server) {
    const peerHost: string = req.conn.remoteAddr.hostname;

    console.log(`Host ${peerHost} connected`);

    req.respond({});
}

I get:

error: TS2339 [ERROR]: Property 'hostname' does not exist on type 'Addr'.
  Property 'hostname' does not exist on type 'UnixAddr'.
    const peerHost: string = req.conn.remoteAddr.hostname;

When I replace req.conn.remoteAddr.hostname with (req.conn.remoteAddr as Deno.NetAddr).hostname everything works as expected:

Started
Host 127.0.0.1 connected

The full remoteAddr looks similar to { hostname: "127.0.0.1", port: 64859, transport: "tcp" }

Version

$ deno --version
deno 1.0.0
v8 8.4.300
typescript 3.9.2

[xReveres]

I also solved it by doing like this:

const remote = JSON.parse(JSON.stringify(req.conn.remoteAddr));
console.log(remote.hostname, remote.port, remote.transport);

It is bugged like groups in regex match I guess

[SyrupThinker]

Your error is a duplicate of #5102, check this comment; it applies to the hostname field aswell.

Your cast (req.conn.remoteAddr as Deno.NetAddr).hostname is an expected solution because you know contextually that it is a Deno.NetAddr.

[bartlomieju]

@SyrupThinker's response is a proper solution