opencode/packages/opencode/src/server/server.ts at dev · argszero/opencode · GitHub

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import "./init-projectors"

import { NodeHttpServer } from "@effect/platform-node"

import { AppNodeBuilder } from "@opencode-ai/core/effect/app-node-builder"

import { ConfigProvider, Context, Effect, Exit, Layer, Scope } from "effect"

import { HttpRouter, HttpServer } from "effect/unstable/http"

import { OpenApi } from "effect/unstable/httpapi"

import { createServer } from "node:http"

import { MDNS } from "./mdns"

import { HttpApiApp } from "./routes/instance/httpapi/server"

import { disposeMiddleware } from "./routes/instance/httpapi/lifecycle"

import { WebSocketTracker } from "./routes/instance/httpapi/websocket-tracker"

import { PublicApi } from "./routes/instance/httpapi/public"

import type { CorsOptions } from "@opencode-ai/server/cors"

import { lazy } from "@/util/lazy"

// @ts-ignore This global is needed to prevent ai-sdk from logging warnings to stdout https://github.com/vercel/ai/blob/2dc67e0ef538307f21368db32d5a12345d98831b/packages/ai/src/logger/log-warnings.ts#L85

globalThis.AI_SDK_LOG_WARNINGS = false

export type Listener = {

hostname: string

port: number

url: URL

stop: (close?: boolean) => Promise<void>

}

type ServerApp = {

fetch(request: Request): Response | Promise<Response>

request(input: string | URL | Request, init?: RequestInit): Response | Promise<Response>

}

type ListenOptions = CorsOptions & {

port: number

hostname: string

mdns?: boolean

mdnsDomain?: string

}

type ListenerState = {

scope: Scope.Scope

server: Context.Service.Shape<typeof HttpServer.HttpServer>

http: ListenerServer

websockets: WebSocketTracker.Interface

}

type EffectListener = Omit<Listener, "stop"> & {

stop: (close?: boolean) => Effect.Effect<void>

}

interface ListenerServer {

readonly closeAll: Effect.Effect<void>

}

class ListenerServerService extends Context.Service<ListenerServerService, ListenerServer>()(

"@opencode/ListenerServer",

) {}

export const Default = lazy(() => {

const handler = HttpApiApp.webHandler().handler

const app: ServerApp = {

fetch: (request: Request) => handler(request, HttpApiApp.context),

request(input, init) {

return app.fetch(input instanceof Request ? input : new Request(new URL(input, "http://localhost"), init))

}

return { app }

})

export async function openapi() {

return OpenApi.fromApi(PublicApi)

}

export let url: URL | undefined

export async function listen(opts: ListenOptions): Promise<Listener> {

const listener = await Effect.runPromise(listenEffect(opts))

return {

hostname: listener.hostname,

port: listener.port,

url: listener.url,

stop: (close?: boolean) => Effect.runPromiseExit(listener.stop(close)).then(() => undefined),

}

const listenEffect: (opts: ListenOptions) => Effect.Effect<EffectListener, unknown> = Effect.fn("Server.listen")(

function* (opts: ListenOptions) {

const state = yield* startWithPortFallback(opts)

const address = yield* tcpAddress(state)

const listenerUrl = makeURL(opts.hostname, address.port)

const unpublishMdns = yield* setupMdns(opts, address.port, state.scope)

url = listenerUrl

return {

hostname: opts.hostname,

port: address.port,

url: listenerUrl,

stop: yield* makeStop(state, unpublishMdns, listenerUrl),

}

)

function listenerLayer(opts: ListenOptions, port: number) {

return HttpRouter.serve(HttpApiApp.createRoutes(opts), {

middleware: disposeMiddleware,

disableLogger: true,

disableListenLog: true,

}).pipe(

Layer.provideMerge(AppNodeBuilder.build(WebSocketTracker.node)),

Layer.provideMerge(serverLayer({ port, hostname: opts.hostname })),

// Install a fresh `ConfigProvider` per listener so `Config.string(...)`

// reads reflect the current `process.env`. Effect's default

// `ConfigProvider` snapshots `process.env` on first read and caches the

// result on a module-singleton Reference; without overriding it here,

// every later `Server.listen()` keeps observing that initial snapshot.

Layer.provide(ConfigProvider.layer(ConfigProvider.fromEnv())),

)

}

function startWithPortFallback(opts: ListenOptions) {

if (opts.port !== 0) return startListener(opts, opts.port)

// Match the legacy listener port-resolution behavior: explicit `0` prefers

// 4096 first, then any free port.

return startListener(opts, 4096).pipe(Effect.catch(() => startListener(opts, 0)))

}

function startListener(opts: ListenOptions, port: number) {

const scope = Scope.makeUnsafe()

return Layer.buildWithMemoMap(listenerLayer(opts, port), Layer.makeMemoMapUnsafe(), scope).pipe(

Effect.provide(HttpApiApp.context),

Effect.onError(() => Scope.close(scope, Exit.void).pipe(Effect.ignore)),

Effect.map(

(ctx): ListenerState => ({

scope,

server: Context.get(ctx, HttpServer.HttpServer),

http: Context.get(ctx, ListenerServerService),

websockets: Context.get(ctx, WebSocketTracker.Service),

}),

)

}

function tcpAddress(state: ListenerState) {

return Effect.gen(function* () {

if (state.server.address._tag === "TcpAddress") return state.server.address

yield* Scope.close(state.scope, Exit.void).pipe(Effect.ignore)

return yield* Effect.die(new Error(`Unexpected HttpServer address tag: ${state.server.address._tag}`))

})

}

function makeURL(hostname: string, port: number) {

const result = new URL("http://localhost")

result.hostname = hostname

result.port = String(port)

return result

}

function setupMdns(opts: ListenOptions, port: number, scope: Scope.Scope) {

return Effect.gen(function* () {

const publish =

opts.mdns && port && opts.hostname !== "127.0.0.1" && opts.hostname !== "localhost" && opts.hostname !== "::1"

if (publish) {

const unpublish = yield* Effect.cached(Effect.sync(() => MDNS.unpublish()))

yield* Effect.sync(() => MDNS.publish(port, opts.mdnsDomain))

yield* Scope.addFinalizer(scope, unpublish)

return unpublish

}

if (opts.mdns) {

yield* Effect.logWarning("mDNS enabled but hostname is loopback; skipping mDNS publish")

}

return Effect.void

})

}

function makeStop(state: ListenerState, unpublishMdns: Effect.Effect<void>, listenerUrl: URL) {

return Effect.gen(function* () {

const forceCloseOnce = yield* Effect.cached(forceClose(state).pipe(Effect.ignore))

const closeScopeOnce = yield* Effect.cached(

Scope.close(state.scope, Exit.void).pipe(

Effect.ignore,

Effect.ensuring(

Effect.sync(() => {

if (url === listenerUrl) url = undefined

}),

)

return (close?: boolean) =>

Effect.gen(function* () {

yield* unpublishMdns

if (close) yield* forceCloseOnce

yield* closeScopeOnce

})

}

function forceClose(state: ListenerState) {

return Effect.all([state.http.closeAll, state.websockets.closeAll], { concurrency: "unbounded", discard: true })

}

function serverLayer(opts: { port: number; hostname: string }) {

const server = createServer()

const serverRef = { closeStarted: false, forceStop: false }

const close = server.close.bind(server)

// Keep shutdown owned by NodeHttpServer, but honor listener.stop(true) by

// force-closing active HTTP sockets when its finalizer calls server.close().

// oxlint-disable-next-line typescript-eslint/no-unsafe-type-assertion -- Node's overloads don't preserve a monkey-patched method assignment.

server.close = ((callback?: Parameters<typeof server.close>[0]) => {

serverRef.closeStarted = true

const result = close(callback)

if (serverRef.forceStop) server.closeAllConnections()

return result

}) as typeof server.close

return Layer.mergeAll(

NodeHttpServer.layer(() => server, { port: opts.port, host: opts.hostname, gracefulShutdownTimeout: "1 second" }),

Layer.succeed(ListenerServerService)(

ListenerServerService.of({

closeAll: Effect.sync(() => {

serverRef.forceStop = true

if (serverRef.closeStarted) server.closeAllConnections()

}),

)

}

export * as Server from "./server"

opencode/packages/opencode/src/server/server.ts at dev · argszero/opencode · GitHub

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