Switch from unix socket to TCP proxy

Proxy to Go server on 127.0.0.1:8000 instead of unix socket.
Go sees localhost connections as trusted for auto-login.
Removes all the unix socket, IP forwarding, and socket path
plumbing complexity.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/binary.ts

@@ -1,8 +1,9 @@
 import { join } from 'path'
-import { accessSync, chmodSync, constants, mkdirSync, unlinkSync } from 'fs'
+import { accessSync, chmodSync, constants, mkdirSync } from 'fs'
 import type { Subprocess } from 'bun'
 
 const BIN_DIR = join(import.meta.dir, '..', 'bin')
+const GO_PORT = 8000
 
 let healthy = false
 let proc: Subprocess | undefined
@@ -16,10 +17,10 @@ function getBinaryName(): string {
   return `tronbyt-server-${platform}-${arch}`
 }
 
-async function waitForHealthy(socketPath: string, maxAttempts = 60): Promise<boolean> {
+async function waitForHealthy(maxAttempts = 60): Promise<boolean> {
   for (let i = 0; i < maxAttempts; i++) {
     try {
-      const resp = await fetch('http://localhost/health', { unix: socketPath })
+      const resp = await fetch(`http://127.0.0.1:${GO_PORT}/health`)
       if (resp.ok) return true
     } catch {}
     await Bun.sleep(1000)
@@ -63,7 +64,7 @@ function validate(dataDir: string): string | undefined {
   }
 }
 
-export async function spawn(dataDir: string, socketPath: string) {
+export async function spawn(dataDir: string) {
   const binPath = join(BIN_DIR, getBinaryName())
 
   if (!(await Bun.file(binPath).exists())) {
@@ -76,14 +77,11 @@ export async function spawn(dataDir: string, socketPath: string) {
     return
   }
 
-  try { unlinkSync(socketPath) } catch {}
-
   console.log('Starting tronbyt server...')
 
   proc = Bun.spawn([binPath], {
     env: {
       ...process.env,
-      TRONBYT_UNIX_SOCKET: socketPath,
       DATA_DIR: dataDir,
       DB_DSN: join(dataDir, 'tronbyt.db'),
       PRODUCTION: process.env.PRODUCTION ?? 'true',
@@ -100,7 +98,7 @@ export async function spawn(dataDir: string, socketPath: string) {
     proc = undefined
   })
 
-  if (await waitForHealthy(socketPath)) {
+  if (await waitForHealthy()) {
     healthy = true
     console.log('Tronbyt server is healthy')
   } else {

src/proxy.ts

@@ -5,31 +5,29 @@ export interface WsData {
   protocols: string[]
 }
 
+const GO_PORT = 8000
+const GO_BASE = `http://127.0.0.1:${GO_PORT}`
+
 const upstreams = new Map<ServerWebSocket<WsData>, WebSocket>()
 
-export function createProxy(socketPath: string, isHealthy: () => boolean, isRunning: () => boolean) {
+export function createProxy(isHealthy: () => boolean, isRunning: () => boolean) {
-  async function proxyFetch(req: Request, clientIP?: string): Promise<Response> {
+  async function proxyFetch(req: Request): Promise<Response> {
     const url = new URL(req.url)
 
     if (url.pathname === '/ok') {
       if (!isHealthy()) return new Response('starting', { status: isRunning() ? 200 : 503 })
-      return fetch('http://localhost/health', { unix: socketPath })
+      return fetch(`${GO_BASE}/health`)
         .then((r) => (r.ok ? new Response('ok') : new Response('unhealthy', { status: 503 })))
         .catch(() => new Response('unhealthy', { status: 503 }))
     }
 
     const hasBody = req.method !== 'GET' && req.method !== 'HEAD'
     const body = hasBody ? await req.arrayBuffer() : undefined
-    const headers = new Headers(req.headers)
-    const forwardedFor = req.headers.get('x-forwarded-for')
-    headers.set('x-forwarded-for', forwardedFor ? `${forwardedFor}, ${clientIP}` : (clientIP ?? ''))
-    headers.set('x-real-ip', clientIP ?? '')
 
-    return fetch(`http://localhost${url.pathname}${url.search}`, {
+    return fetch(`${GO_BASE}${url.pathname}${url.search}`, {
       method: req.method,
-      headers,
+      headers: req.headers,
       body,
-      unix: socketPath,
     }).then((r) => {
       // Bun auto-decompresses gzip but leaves content-encoding header.
       // Strip it so the next proxy layer doesn't try to decompress again.
@@ -45,7 +43,7 @@ export function createProxy(socketPath: string, isHealthy: () => boolean, isRunn
 
   const websocket = {
     open(ws: ServerWebSocket<WsData>) {
-      const upstream = new WebSocket(`ws+unix://${socketPath}:${ws.data.path}`, ws.data.protocols)
+      const upstream = new WebSocket(`ws://127.0.0.1:${GO_PORT}${ws.data.path}`, ws.data.protocols)
       upstream.binaryType = 'arraybuffer'
       upstreams.set(ws, upstream)
 

src/server.ts

@@ -1,12 +1,10 @@
-import { join } from 'path'
 import { createProxy, type WsData } from './proxy'
 import { isHealthy, isRunning, shutdown, spawn } from './binary'
 
 const DATA_DIR = process.env.DATA_DIR!
 const PORT = Number(process.env.PORT) || 3000
-const SOCKET_PATH = join(DATA_DIR, 'tronbyt.sock')
 
-const { proxyFetch, websocket } = createProxy(SOCKET_PATH, isHealthy, isRunning)
+const { proxyFetch, websocket } = createProxy(isHealthy, isRunning)
 
 const server = Bun.serve({
   port: PORT,
@@ -25,9 +23,7 @@ const server = Bun.serve({
       return new Response('WebSocket upgrade failed', { status: 500 })
     }
 
-    const clientIP = req.headers.get('x-forwarded-for')?.split(',')[0]?.trim()
+    return proxyFetch(req)
-      || server.requestIP(req)?.address
-    return proxyFetch(req, clientIP)
   },
 
   websocket,
@@ -38,4 +34,4 @@ console.log(`Listening on port ${server.port}`)
 process.on('SIGTERM', shutdown)
 process.on('SIGINT', shutdown)
 
-spawn(DATA_DIR, SOCKET_PATH)
+spawn(DATA_DIR)